The mitochondrion is known as the “powerhouse” of eukaryotic cells since it is the main site of adenosine 5′‐triphosphate (ATP) production. Using a temperature‐sensitive fluorescent probe, it has recently been suggested that the stray free energy, not captured into ATP, is potentially sufficient to sustain mitochondrial temperatures higher than the cellular environment, possibly reaching up to 50 °C. By 50 °C, some DNA and mitochondrial proteins may reach their melting temperatures; how then do these biomolecules maintain their structure and function? (...) Further, the production of reactive oxygen species (ROS) accelerates with temperature, implying higher oxidative stresses in the mitochondrion than generally appreciated. Herein, it is proposed that mitochondrial heat shock proteins (particularly Hsp70), in addition to their roles in protein transport and folding, protect mitochondrial proteins and DNA from thermal and ROS damage. Other thermoprotectant mechanisms are also discussed. (shrink)

Zunächst wird anhand von drei europäischen Schriftstellern, Ärzten und Historikern und in Form von zusammengesetzten Auszügen eine Zusammenfassung der arabisch-islamischen Medizin während 500 Jahren vorgelegt.Die Ethik im allgemeinen und dann in der Medizin der Araber im speziellen wird fortfahrend sehr klar dargestellt.Da im Islam die Wissenschaft sehr gelobt und vorangetrieben wird, ist die schnelle Entwicklung der modernen Medizin – Klonen, Organverpflanzung, Exitus, Sterbehilfe etc. – nicht in Kontradiktion mit der Religion, vorausgesetzt, daß die Einheit Gottes und die Würde seiner Propheten (...) – Moses, Jesus und Mohammed – nicht und die Würde des Menschen selbst nicht erniedrigt wird. (shrink)

Positive Psychology Interventions as an Opportunity in Arab Countries to Promoting Well-being AbstractIn this perspective paper, we emphasize the importance of further research on culturally-sensitive positive psychology interventions in the Arab region. We argue that these interventions are needed in the region because they not only reduce mental health problems but also promote well-being and flourishing. To achieve this, we shed light on the cultural elements of the Arab region and how the concept of well-being differs from that of Western (...) culture. We review the research conducted in Arabia, briefly evaluate the quality of this research and list some adapted measurements. We furthermore propose guidelines and recommendations for future evidence-based positive psychology interventions research to align with the national culture in various sectors and community samples that contribute to the development of well-being in the Arab world.Introduction Extensive research on Positive Psychology Interventions (PPIs) - defined as activities focus on promoting positive feelings, thoughts, or behaviour (Sin & Lyubomirsky, 2009) - has shown their effectiveness in well-being and mental illness (e.g., Chakhssi et al., 2018; Hendriks et al., 2020). A recent review of 347 studies showed that PPIs have a significant effect on promoting quality of life and well-being and reducing anxiety and depression (Carr et al., 2020). However, the issue is that most of these studies (82%) remain narrow in focus only on Western Educated Industrialised Rich Democratic (WEIRD) countries (Hendriks et al., 2019). Therefore, they may not be effective for other countries such as the Arab countries where there are various cultural differences. This highlights the key role that culture can play in enhancing PPIs engagement, acceptability, and eventually, effectiveness (Hendriks & Graafsma, 2019). Recently, the field of PP in the Arab region has begun to grow (Basurrah et al., 2021; Rao et al., 2015). However, studies conducted in these countries are scant and of poor methodological quality. We have found humble quantity and quality of empirical studies. Yet, Arab countries, home to 5% of the world’s population, have a burden of mental health problems above global levels (GBD 2015 Eastern Mediterranean Region Mental Health Collaborators, 2018). Prevalent stigma, war and conflict were some of the contributors (Maalouf et al., 2019). Thus, to properly address this cultural stigma against mental health problems, PPIs could provide an additional role alongside traditional psychology approaches (e.g., Cognitive Behavioural therapy - CBT). Further, in light of the political conditions that some Arab countries are going through and the negative effects that they cause, it has become necessary to use the method of prevention that is the focus of PP and not only of treatment as a strategy for applications and practice. It has been noted that the mental health care system in the Arab region focuses highly on illnesses treatment and neglects the significant role that PP plays in enhancing human potential and well-being. We - here in Arabia –are becoming more influenced by many global issues particularly the COVID-19 pandemic and their impact on mental health and well-being (e. g. prevalence of stress, anxiety, depression among the general population during the pandemic (Salari et al., 2020). In response, Waters et al. (2021) have recently presented how positive psychological factors can play a significant role in buffering mental illness, enhancing mental health throughout the pandemic, and building positive processes and capacities that can help to promote future mental health.Here in this perspective paper, we highlight the cultural aspects of Arab countries. Specifically, we present previous PPIs research conducted in Arabia and briefly evaluate the quality of this research. Importantly, we discuss the need of developing an indigenous and culturally sensitive PP among the Arab region (Lambert et al., 2015).Arab Culture “Arab World,” which comprises 5% of the world’s population, refers to the Arab countries in the Middle East and North Africa. Despite the increasing pace and progress of different businesses in many Arab countries, individual communities are still limited in certain prominent economic places. Arab people rather gather in collective communities. They generally share the same Arabic Islamic culture, speak the same language, and descend from the same Arab families when going back in history no matter what nationality they have nowadays. Yet, very many changes came to communities before borders were drawn between countries and after. For instance, geography, topography, demography, and socio-economic status affect peoples’ nature of jobs and lifestyles. For example, Arabs in the east, west, or the middle have similar tongues; however, almost every Arab country has its accent. Therefore, people need to go back to the formal Arabic language ‘Fus-ha’ or learn more about different Arabic dialects when communicating cross-countries. According to Hofstede’s model (2011) based on the individualism-collectivism dimension, the Arab countries (Eastern society) have been classified as a collectivist culture, where their identity and decisions are influenced by social systems. In contrast, the United States (Western society) has been classified as an individualist culture focusing on individual decisions. Although there are degrees of individualism among Arabs in certain countries, they still share collective common characteristics. Here, we explore the meaning of collectivistic conceptions of the self, emotions, values, and religion in Arab countries and how they differ from those in individual Western cultures. The Self Since the field of PP focuses on the development of self, it is vital to recognize that self-concept varies across cultures. Individualism generally emphasises the self-directed and autonomous individual (Realo et al., 2002). People in individualist countries focus primarily on their personal characteristics (e.g., motives, abilities) to build their self-concept. On the other hand, collectivism refers to several social structures that highly value the groups to which people belong, such as family and tribe (Realo, 2003). People in collectivist countries such as the Arab countries focus primarily on their relationships with others to build their self-concept (Markus & Kitayama, 1991). Hence, research from Arab countries should focus on the core elements of collectivism when implementing PPIs to make a significant, meaningful impact. For example, people from a collective culture may experience a greater enhancement in well-being when practising interventions that are more prosocial and group-oriented such as compassion, performing acts of kindness, writing a gratitude letter, and using character strengths in everyday context including social context, compared with self-oriented interventions such as identifying character strengths. Emotions, value, and Religion Research shows that Western culture emphasises the goal of maximizing positive emotions, while Eastern culture emphasises embracing and balancing positive and negative emotions (Leu et al., 2011). To illustrate, culture plays an important role in influencing perceptions of happiness. People in individualist countries value happiness highly. In contrast, people from the collective countries value low arousal positive emotions (Leu et al., 2011) and exhibit a fear of happiness (Joshanloo & Weijers, 2014; Joshanloo, 2013). Hence, the influence of positive emotions plays a limited role in the mental health of Eastern society. Speaking of Value, for an Arab, the family is the centre of honour and the most important social unit. This loyalty has an impact on every part of an Arab’s life. Arabs honour their families and highly value their friendships. Therefore, future research could shed more light on group-oriented interventions (e.g., kindness) that focus more on the relationship with family, friends, and community. When it comes to religion, Arab society has a rich culture in values and believes that place a high emphasis on spirituality. Religion is the most important and distinctive aspect of Arab culture. Arab countries vary in terms of religion, with Islam being the predominant religion in most of them. Well-being (Hedonic and Eudaimonic) It is necessary here to clarify what is meant by hedonic and eudaimonic definitions of well-being. While the term ‘Hedonic’ is based on the pursuit of maximum levels of pleasure (feeling good), the term ‘Eudaimonic’, on the other hand, is based on meaning and the development of virtues (functioning well; Keyes & Annas, 2009). Research indicates that cultures are not equally supportive of hedonic and eudaimonic aspects (Joshanloo & Jarden, 2016). In comparison to collectivism, hedonism appears to be more congruent with individualism (Joshanloo, 2014). Pleasure and positive emotions are considered a way to pursue happiness in Western culture, while this method is not highly favoured in Eastern cultures (Lee et al., 2013); Because they consider suffering and negative emotions as contributing factors to spiritual development. Therefore, the eastern perspective is more in line with a eudaimonistic view which emphasises virtues, meaning, and feeling of belongingness. However, although we believe that both approaches can be found to a certain level in both cultures, the differences suggest that there are different routes to happiness. Positive Psychology in the Arab region Positive psychology - "the scientific study of what makes life most worth living" (Seligman & Csikszentmihalyi, 2000) - is one of the newest branches of psychology. It focuses on three main pillars: (1) positive subjective experiences (such as happiness and love); (2) positive individual characters (such as gratitude and compassion); and (3) positive institutions (for the application of positive principles within institutions and organizations; Seligman & Csikszentmiha lyi, 2000). Some of the main topics of interest in positive psychology include character strengths, gratitude, hope, happiness, mindfulness, optimism, positive thinking, and resilience. Within the applications of this science, various domains of well-being (such as happiness, engagement, positive emotions, and meaning) can be enhanced by practising positive psychology interventions (Sin & Lyubomirsky, 2009). Interestingly, these interventions have also produced benefits beyond well-being, such as reduced mental health issues (Chakhssi et al., 2018; Hendriks et al., 2020).Nowadays, PP is increasingly noticed in the Arab world (Lambert & Pasha-Zaidi, 2019; Rao et al., 2015). In recent years, there has been a great effort to explore the PP field across Arab countries. Several initiatives have emerged aimed at promoting well-being and flourishing. For example, the Middle East Journal of Positive Psychology published its first volume in 2015. On the International Day of Happiness in 2017, United Arab Emirates University launched its Emirates Center for Happiness Research. Meanwhile, Effat University in Saudi Arabia started the first Positive Psychology and Well-being Research Lab, the first symposium, and the first PP course. In 2019, Louise Lambert and Nausheen Pasha-Zaidi published the first regional text entitled “Positive Psychology in the Middle East/North Africa.” There are other efforts spent in the region as well; such as the work conducted in Egypt. Ibrahim Younus established the Arab Association for Positive Psychology https://www.psycholearn.com/en/associative.php which provides several courses on PP and also published a book entitled “The Power of Positive Psychology” (Younus, 2017). Despite this development, nothing can compare to the quantity and even quality of research in other countries. In light of our observations, the few PP studies may be attributed to the lack of awareness of the constructive approach and prevention compared to problem-solving. An Arab dentist once said: “people do not come to me until they are badly in pain.” In any case, many studies have taken place in Arab countries in the last decade, more of which are descriptive and less of which experimental. For example, Abdel-Khalek (2010) found positive correlations between quality of life, subjective well-being, and religiosity among students in Kuwait. Abdel-Khalek (2016) developed “the Arabic Scale of Religiosity,” which significantly correlated with PP variables among students in Algeria, Kuwait, and Egypt. Recently, empirical studies on PPIs have arisen in Arab-Islamic countries. More attention has been focused on promoting well-being and alleviating the high burden of mental health problems in the region (GBD 2015 Eastern Mediterranean Region Mental Health Collaborators, 2018). For instance, several studies examined the effectiveness of mindfulness among university students (e.g., Al-Ghalib & Slim, 2018; Awad, 2019; Thomas et al., 2016), parents of children with autism (Rayan & Ahmed, 2016) and addicted adults (Al-Rashidi, 2018). Such an intervention has positive effects. Participants who practised mindfulness reported reduction in stress and depression as well as improvement in well-being and resilience. Moreover, the results of a recent pilot study found positive impacts on enhancing emotional regulations and reducing stress among Arab teachers (Berkovich-Ohana et al., 2020). Some studies have also begun to examine various interventions targeting character strengths (Basurrah et al., 2020; Chérif et al., 2020), self-compassion (Elaiwah, 2017), positive thinking (Mohammed et al., 2014; Hadad, 2014), and hope (Zaki, 2016). Interestingly, a new finding considering the fear of happiness among people from collective countries has been examined. Lambert et al. (2019) provided evidence that a 14-week PPIs programme has an impact on reducing the fear and fragility of happiness beliefs among university students in the United Arab Emirates.Since Arab countries place great emphasis on spirituality, several authors have considered the aspect of religion when implementing PPIs. For instance, an empirical study by Al-Seheel and Noor (2016) found that expressing gratitude towards God “Allah” increases the happiness of the Muslim more than the usual gratitude intervention. Additionally, Al-Ghalib and Salim (2018) examined a religiously sensitive mindfulness-training programme with university students and found a positive effect on life satisfaction and a slight reduction in stress, depression, and anxiety. Hence, the role of religion is vital to make the interventions more relevant to Arab culture where people can connect Islamic philosophy with PP theories and practices. These studies reviewed here provide further support for the need for culturally sensitive interventions among the Arab population. More recently, the first systematic review of PPIs in Arab countries was conducted by Basurrah et al. (2021; the protocol has been published in BMJ Open and the final manuscript has been submitted for publication). Reviewing a total of 39 studies, the most commonly studied interventions were mindfulness, positive thinking, and resilience. Only a handful of studies examined gratitude, character strengths, forgiveness, self-compassion, savouring, or finding flow. Further analysis revealed that most studies from Arab countries have several methodological limitations. This included a lack of protocol guidelines, few well-designed randomized controlled trials (RCTs), blinding issues, small sample sizes, lack of active control groups, and lack of research into certain populations (e.g., teachers, employees, and people in distress in refugee camps). Discussion PP was founded on an individualistic framework (Christopher & Hickinbottom, 2008). To ensure that PPIs are culturally meaningful, this paper includes some cultural elements of the Arab region that should be considered to serve the needs of the Arab population. In the Arab world, some people may believe that PP is solely about happiness and being positive. If so, it is important to educate the public about the findings of rigorous studies evaluating PPIs such as gratitude, hope or flow on health, well-being and performance. To explain the value and effectiveness of these evidence-based approaches, examples might include studies linking gratitude with benefits for people with heart disease (Cousin et al., 2021), or how PPIs can promote quality of life in cancer patients (Casellas-Grau et al., 2014). There is some evidence about PPIs being effective in improving well-being in the Arab region, but research in this region is still in its infancy and little information is available regarding PPIs and the experience of Arabs participating in such interventions. Hence, there is still much more to investigate in this regard. Future research should empirically examine the effectiveness of various unstudied interventions such as savouring, gratitude, self-compassion, character strengths or finding flow. A combination of quantitative and qualitative approaches is required to provide an in-depth understanding of Arabs’ experience and impressions of PPIs and how and why they work. This may provide useful information to inform the appropriate design of PPIs to suit Arab culture and needs. Furthermore, while some research on PPIs has been carried out in the region, most of these studies have been of poor quality that suffered from small sample sizes, confounding factors, and a high degree of bias. To overcome these issues, future research should improve research quality, including protocol guidelines and well-designed RCTs. In particular, research should include randomization, allocation, blinding, power analysis to determine adequate sample size, active control groups to reduce bias, and follow-up periods of at least 12 months.Among the most popular resources that future PP practitioners may refer to are the International Positive Psychology Association (IPPA) and the International Positive Education Network (IPEN). Also, we recommend the Middle East Journal of Positive Psychology and the first regional book (Lambert & Pasha-Zaidi, 2019). To develop and/or adapt a multi-component PPIs, we would recommend referring to Character Strengths (Peterson & Seligman, 2004), the theory of well-being (PERMA Model: Positive Emotion, Engagement, Relationships, Meaning, and Accomplishment; Seligman, 2011), and the Five Ways to Well-being: Connect, Be Active, Take Notice, Keep Learning, and Give (Aked et al., 2008). Finally, single-component PPIs are based on theories like Broaden-And-Build (Fredrickson, 2004), Hope (Snyder et al., 2002), and Self-Determination (Deci & Ryan, 2012) can be also considered. Two other concepts that would be usefully applied are ‘Savouring’ (Bryant & Veroff, 2007) and Phillip Zimbardo’s Time Perspective (Stolarski et al., 2015). For instance, savouring has a positive temporal orientation to reminiscing the good memories from the past, enjoying the hedonic present moments, and willing proactively to make a better future. Now, what is even maybe more interesting for Muslims is “Transcendent Future” where all intentions, words and actions are devoted to that life after death. In addition, there is a model already prepared for the clinical purpose called Positive Psychotherapy (PPT). Tayyab Rashid and Martin Seligman published a PPT manual for clinicians in 2018. And for cross-cultural applications, including Muslim Arab culture, Rashid and Al-Haj Baddar (2019) have written a paper presenting PPT and its efficacy. PPT overview in detail shows sessions, themes, skills, practice, and cultural considerations where a mixture of PPIs based on PERMA, Strengths, and other PP concepts can be found. Regarding PP measurements, it is highly recommended to generate indigenous tools based on cultural backgrounds reviewed here in the article. An example of this is a tool for measuring Muslim well-being by including domains beyond what is found in Western literature. So far, in the Arab region, several attempts have been made to adapt PP tools. For example, Marei Salama-Younes (2018) validated the Arabic versions of different measures of well-being (e.g., satisfaction with life scale, the subjective vitality scale). Other validated scales as well include the self-compassion scale (Alabdulaziz et al., 2020), and the passion scale (Salama-Younes & Hashim, 2018). Conclusion This paper has discussed the cultural aspects of Arab countries and the need of developing culturally sensitive PPIs. The past decade has seen an increase in mental health problems in the Arab region. Stigma and lack of awareness have been always there. Among the issues are also wars, conflicts, and displacement in many Arab countries such as Iraq, Lebanon, and Palestine (Hassan et al., 2016). These indicate an urgent need to prevent mental illness and promote well-being. Indeed, we highlighted the importance of integrating culture with PPIs, following the guidelines for the cultural adaptation of PPIs (Hendriks & Graafsma, 2019) and the ethical guidelines for PP practice (Jarden et al., 2020). Another significant contribution of this paper is to highlight the importance of improving the quality of research conducted in Arab countries. In brief, this paper has several practical implications. It is an open invitation for researchers, policymakers, and practitioners alike to be more exposed to PP; as well as to better conceptualising and adapting interventions and measurement tools to the local culture in different sectors to maximize their effectiveness. And as we consider it as an invitation for us too, here we are starting a PPIs practice guide in Arabic language and for Arab practitioners. The insights gained from this paper may be useful for placing well-being on top of priorities for achieving individual, organizational, and optimal national functioning in different sectors. There is also a need to change the stigma or negative beliefs about seeking health for psychological support, which is an issue for countries in the Middle East (Baess, 2018). (shrink)

By moving away from the traditional reductionist reading of the quantum theory of atoms in molecules, in this paper we analyze the role played by QTAIM in the relationship between molecular chemistry and quantum mechanics from an emergentist perspective. In particular, we show that such a relationship involves two steps: an intra-domain emergence and an inter-domain emergence. Intra-domain emergence, internal to quantum mechanics, results from the fact that the electron density, from which all the other QTAIM’s concepts are defined, arises (...) from the wavefunction as a coarse-grained magnitude. Inter-domain emergence involves an analogical link, a mapping, between QTAIM’s entities, such as topological atoms and bond paths, and the entities that populate the molecular-chemistry domain, such as chemical atoms and chemical bonds. (shrink)

In the spring of 2003, Jacques Derrida sat down for a public debate in Paris with Algerian intellectual Mustapha Chérif. The eminent philosopher arrived at the event directly from the hospital where he had just been diagnosed with pancreatic cancer, the illness that would take his life just over a year later. That he still participated in the exchange testifies to the magnitude of the subject at hand: the increasingly distressed relationship between Islam and the West, and the questions of (...) freedom, justice, and democracy that surround it. As Chérif relates in this account of their dialogue, the topic of Islam held special resonance for Derrida—perhaps it is to be expected that near the end of his life his thoughts would return to Algeria, the country where he was born in 1930. Indeed, these roots served as the impetus for their conversation, which first centers on the ways in which Derrida’s Algerian-Jewish identity has shaped his thinking. From there, the two men move to broader questions of secularism and democracy; to politics and religion and how the former manipulates the latter; and to the parallels between xenophobia in the West and fanaticism among Islamists. Ultimately, the discussion is an attempt to tear down the notion that Islam and the West are two civilizations locked in a bitter struggle for supremacy and to reconsider them as the two shores of the Mediterranean—two halves of the same geographical, religious, and cultural sphere. Islam and the West is a crucial opportunity to further our understanding of Derrida’s views on the key political and religious divisions of our time and an often moving testament to the power of friendship and solidarity to surmount them. (shrink)

Today’s organizations are operating in a highly competitive and changing environment that pushes them to continuously adapt their organizational structures to such environment. However, the success of change initiatives may face a barrier in the response of employees, especially when they lack readiness to change. While leadership can shape the culture of an organization and a culture of effectiveness can help increase employees’ readiness to change, ethical leaders, who serve as a guide and offer support, can also make a difference (...) by reducing uncertainty. Yet existing research on the role of ethical leadership in the enhancement of the employees’ readiness to change is practically non-existent. Far less is the research that analyses the mechanisms that ethical leadership can use to foster employees’ readiness to change. This study aims to investigate whether the ethical leadership of middle-lower echelons influences on employees’ readiness to change positively (H1) and if this relationship is mediated through shaping an organizational culture of effectiveness (H2). Using data from 270 direct reports of middle–lower managers in public foreign trade Egyptian companies, the findings reveal that ethical leadership enhances employees’ readiness to change and that this impact is partially mediated by an organizational culture of effectiveness. Thus, with these findings, new light is shed on the positive role of ethical leadership and the mechanisms it uses to enhance employees’ readiness to change. (shrink)

In written and spoken communications, figures of speech (e.g., metaphors and synecdoche) are often used as an aid to help convey abstract or less tangible concepts. However, the benefits of using rhetorical illustrations or embellishments in visualization have so far been inconclusive. In this work, we report an empirical study to evaluate hypotheses that visual embellishments may aid memorization, visual search and concept comprehension. One major departure from related experiments in the literature is that we make use of a dual-task (...) methodology in our experiment. This design offers an abstraction of typical situations where viewers do not have their full attention focused on visualization (e.g., in meetings and lectures). The secondary task introduces “divided attention”, and makes the effects of visual embellishments more observable. In addition, it also serves as additional masking in memory-based trials. The results of this study show that visual embellishments can help participants better remember the information depicted in visualization. On the other hand, visual embellishments can have a negative impact on the speed of visual search. The results show a complex pattern as to the benefits of visual embellishments in helping participants grasp key concepts from visualization. (shrink)

In the period preceding the establishment of the first sociology department at the University of Baghdad, the works of Abdul Fattah Ibrahim and Abdul Jabbar Arim played a significant role. These scholars are regarded as pioneers of this pre-foundational phase. Although they did not conduct any field research, the methodologies they advocated for analysing and critiquing Iraqi social reality were well-defined. In Abdul Fattah Ibrahim's first specialised book on sociology, he presents Darwin's theory of evolution as "the foundational principle upon (...) which modern sociology is based." He defines sociology as "the study of society in its evolution according to the law of the survival of the fittest, with the goal of enhancing its ability to endure.". (shrink)

In the past few decades, a lot of optimization methods have been applied in estimating the parameter of photovoltaic models and obtained better results, but these methods still have some deficiencies, such as higher time complexity and poor stability. To tackle these problems, an enhanced success history adaptive DE with greedy mutation strategy is employed to optimize parameters of PV models to propose a parameter optimization method in this paper. In the EBLSHADE, the linear population size reduction strategy is used (...) to gradually reduce population to improve the search capabilities and balance the exploitation and exploration capabilities. The less and more greedy mutation strategy is used to enhance the exploitation capability and the exploration capability. Finally, a parameter optimization method based on EBLSHADE is proposed to optimize parameters of PV models. The different PV models are selected to prove the effectiveness of the proposed method. Comparison results demonstrate that the EBLSHADE is an effective and efficient method and the parameter optimization method is beneficial to design, control, and optimize the PV systems. (shrink)

Introduction: Motherese, or emotional infant directed speech, is the specific form of speech used by parents to address their infants. The prosody of IDS has affective properties, expresses caregiver involvement, is a marker of caregiver-infant interaction quality. IDS prosodic characteristics can be detected with automatic analysis. We aimed to explore whether pregnant women “speak” to their unborn baby, whether they use motherese while speaking and whether anxio-depressive or obstetrical status impacts speaking to the fetus.Participants and Methods: We conducted an observational (...) study of pregnant women with gestational ages from 26 to 38 weeks. Women were recruited in a university hospital department of obstetrics. Thirty-five women agreed to participate in the study, and 26 audio records were exploitable. We collected obstetrical and sociodemographic data, pregnancy outcomes, anxiety and depressive status using the Covy and Raskin Scales, and life events using the Sensations During Pregnancy and Life Event Questionnaire. Each participant was left alone with an audio recorder with a recommendation to feel free to speak to her fetus as she would have done at home. The recording was stopped after 3 min. Audio recordings were analyzed by two methods: psycholinguist experts' annotation and computational objective automatic analyses.Results: Most mothers reported speaking to their fetuses. We found a correlation between maternal first perceptions of fetal movements and the start of mother's speaking to fetus. Motherese prosody was detected with both annotation and automatic analysis with a significant correlation between the two methods. In this exploratory study, motherese use was not associated with maternal anxiodepressive or obstetrical status. However, the more future mothers were depressed, the less they spoke with their fetuses during the recording.Conclusion: Fetal directed speech can be detected during pregnancy, and it contains a period of prosody that shares the same characteristics of motherese that can be described as prenatal motherese or emotional fetal-directed speech. This means that pregnant women start using motherese much earlier than expected. FDS seems to be correlated with maternal first perceptions of fetal movements and depression scores. However, more research is needed to confirm these exploratory results. (shrink)

The Malaysian government recognises the potential contribution of biotechnology to the national economy. However, ongoing controversy persists regarding its ethical status and no specific ethical guidelines have been published relating to its use. In developing such guidelines, it is important to identify the underlying principles that are acceptable to Malaysian society. This paper discusses the process of determining relevant secular and Islamic ethical principles and establishing their similarities before harmonising them. To achieve this, a series of focus group discussions were (...) conducted with 23 knowledge experts representing various stakeholders in the biotechnology community. Notably, several principles between the secular and Islamic perspectives are indirectly or directly similar. All the experts agreed with the predominant six ethical principles of secular and Islamic philosophy and their importance and relevance in modern biotechnology. These are beneficence and non-maleficence as the main or overarching principles, the preservation of religious and moral values, the preservation of the intellect and the mind, the protection of human safety, the protection of future generations, and protection of the environment and biological diversity. Several adjustments were made to the terminologies and definitions of these six principles to formulate acceptable guiding principles for the ethics of modern biotechnology in Malaysia. These can then be adopted as core values to underpin future national guidelines on modern biotechnology ethics. These principles will be particularly important in guiding the policy makers, enforcers, industries and researchers to streamline their activities. In so doing, modern biotechnology and its products can be properly managed without jeopardising the interests of the Muslim community as well as the general public. Importantly, they are expansive and inclusive enough to embrace the religious sensitivity of diverse quarters of Malaysia. (shrink)

The field of artistic works is witnessing continuous changes and developments in new sciences and modern technologies. This is due to the community’s need for these works of art, and as a result of the colored papers remaining from paper manufacturing factories that are not used. The idea of the research was to use these remains to enrich the artwork and give it a contemporary appearance by using colored paper draping techniques to enrich the aesthetic aspect of the artwork.The research (...) aims to achieve three basic axes: an axis to demonstrate the plastic possibilities of the art of colored paper quilling in its various forms, an axis to show the aesthetics of contemporary artwork from the remains of colored paper, and an axis concerned with the implementation of innovative artistic works that achieve sustainable development by linking them to create contemporary designs for use in the artistic work.. Collage style to enrich the field of artistic works among home economics students.Through these entries, the concept of collage art, its types, and its various plastic possibilities were clarified, and the different plastic possibilities of this art were identified. The research also relied on the experimental descriptive approach, through the experiment on fifth-level female students in home economics at King Khalid University. One of the most important results we reached. The hypotheses have been verified and it has been proven that experimenting with the remains of colored paper used in paper mills can achieve various plastic and tangible artistic values that enrich the artistic work of home economics students and achieve sustainable development. The current research recommends experimenting with the aesthetics of collage art using other materials. (shrink)

This paper explores the important role of critical science, and in particular of post-colonial and decolonial theories, in understanding and shaping the ongoing advances in artificial intelligence. Artificial intelligence is viewed as amongst the technological advances that will reshape modern societies and their relations. While the design and deployment of systems that continually adapt holds the promise of far-reaching positive change, they simultaneously pose significant risks, especially to already vulnerable peoples. Values and power are central to this discussion. Decolonial theories (...) use historical hindsight to explain patterns of power that shape our intellectual, political, economic, and social world. By embedding a decolonial critical approach within its technical practice, AI communities can develop foresight and tactics that can better align research and technology development with established ethical principles, centring vulnerable peoples who continue to bear the brunt of negative impacts of innovation and scientific progress. We highlight problematic applications that are instances of coloniality, and using a decolonial lens, submit three tactics that can form a decolonial field of artificial intelligence: creating a critical technical practice of AI, seeking reverse tutelage and reverse pedagogies, and the renewal of affective and political communities. The years ahead will usher in a wave of new scientific breakthroughs and technologies driven by AI research, making it incumbent upon AI communities to strengthen the social contract through ethical foresight and the multiplicity of intellectual perspectives available to us, ultimately supporting future technologies that enable greater well-being, with the goal of beneficence and justice for all. (shrink)

: The Islamic jurists utilized the discipline of maqāṣid al-sharīʿah,in its capacity as the philosophy of Islamic law, in their legal and ethicalinterpretations, with added interest in addressing the issues of modern times.Aphoristically subsuming the major themes of the Sharīʿah, maqāṣid play apivotal role in the domain of decision-making and deduction of rulings onunprecedented ethical discourses. Ethics represent the infrastructure of Islamiclaw and the whole science of Islamic jurisprudence operates in the lightof maqāṣid to realize the ethics in people’s lives. (...) Scrutinizing the key themesof maqāṣid-based ijtihād and scope of ethics in maqāṣid, this article delvesinto the discourse on the application of maqāṣid to medical ethics. As a casestudy, this research analyses the extent of medical confidentiality in the light ofmaqāṣid and arrives at the conclusion that limited confidentiality goes more inline with the maxims of maqāṣid. (shrink)

In written and spoken communications, metaphors are often used as an aid to help convey abstract or less tangible concepts. However, the benefits of using visual metaphors in visualization have so far been inconclusive. In this work, we report an empirical study to evaluate hypotheses that visual metaphors may aid memorization, visual search and concept comprehension. One major departure from previous metaphor-related experiments in the literature is that we make use of a dual-task methodology in our experiment. This design offers (...) an abstraction of typical situations where viewers do not have their full attention focused on visualization (e.g., in meetings and classes). The use of the secondary task introduces “divided attention”, and makes the effects of visual metaphors more observable. In addition, it also serves as additional masking in memory-based trials. The results of this study show that visual metaphors can help participants better remember the information depicted in visualization. On the other hand, visual metaphors can have a negative impact on the speed of visual search. The results also show a complex pattern as to the benefits of visual metaphors in helping participants grasp key concepts from visualization. (shrink)

Neutrosophic theory has many applications in graph theory, bipolar single valued neutrosophic graphs (BSVNGs) is the generalization of fuzzy graphs and intuitionistic fuzzy graphs, SVNGs. In this paper we introduce some types of BSVNGs, such as subdivision BSVNGs, middle BSVNGs, total BSVNGs and bipolar single valued neutrosophic line graphs (BSVNLGs), also investigate the isomorphism, co weak isomorphism and weak isomorphism properties of subdivision BSVNGs, middle BSVNGs, total BSVNGs and BSVNLGs.

Efficient community detection in a complex network is considered an interesting issue due to its vast applications in many prevailing areas such as biology, chemistry, linguistics, social sciences, and others. There are several algorithms available for network community detection. This study proposed the Sigmoid Fish Swarm Optimization algorithm to discover efficient network communities. Our proposed algorithm uses the sigmoid function for various fish moves in a swarm, including Prey, Follow, Swarm, and Free Move, for better movement and community detection. The (...) proposed SiFSO algorithm’s performance is tested against state-of-the-art particle swarm optimization algorithms in Q-modularity and normalized mutual information. The results showed that the proposed SiFSO algorithm is 0.0014% better in terms of Q-modularity and 0.1187% better in terms of NMI than the other selected algorithms. (shrink)

This paper provides a critical review of economic outcome metrics used in healthcare value assessment, emphasizing the evolving landscape of resource allocation, patient-centered approaches, and standardization efforts. With healthcare costs rising globally, the efficient allocation of limited resources is essential. Metrics like Quality-Adjusted Life Years (QALYs), Disability-Adjusted Life Years (DALYs), Incremental Cost-Effectiveness Ratios (ICERs), and Cost-Benefit Analysis (CBA) are central to guiding funding decisions, influencing insurance coverage, and shaping treatment prioritization. Emerging trends, such as the integration of artificial intelligence (AI) (...) and big data, are enhancing the precision of these assessments, while patient-centered metrics underscore the importance of patient satisfaction and quality of life. Additionally, there is a growing push for the standardization of these metrics to create consistent frameworks across diverse health systems. This paper explores case studies, practical applications, and future directions to provide insights into how healthcare systems can adopt more effective, globally aligned economic assessments. (shrink)

Strategic orientation and innovation are vital determinants for accelerating the performance of small-to-medium-sized enterprises. However, there is a lack of empirical evidence confirming the innovation at the product and process levels that instigated the SMEs’ performance. Moreover, the mediating effect of process and product innovation can play a significant role in strategic orientation and manufacturing SMEs’ performance. In this respect, this study aims to examine the mediating effect of product and process innovation between strategic orientation and the performance of Malaysian (...) manufacturing SMEs. The questionnaire survey gathered data from 360 manufacturing SMEs and was analyzed using partial least square structural equation modeling to achieve these research objectives. The study analysis established that customer and entrepreneurial orientation significantly influence product and service innovation. However, the market orientation is significant for process innovation but insignificant for product-level innovation among SMEs. The study’s consequences exposed that process innovation has significantly mediated between the strategic orientation and SMEs performance. It implies that market, entrepreneurial, and customer-related strategies would substantially improve SMEs’ performance by harnessing innovation at product and process levels. The core insights provided by the current work are to strengthen the strategic orientation that can promote product and process innovation, thereby harnessing the SMEs’ performance. Additionally, the study’s significance and limitations were reported at the end. (shrink)

Education for sustainable development aims to develop students' awareness of sustainability issues and foster their attitudes towards environmental, economic, and social sustainability. The study aimed to identify the role of Prince Sattam bin Abdulaziz University in promoting environmental sustainability among its students, in line with Saudi Arabia's Vision 2030. A descriptive analytical approach was used, with a sample of 341 university students. The study found that faculty members ranked first in promoting sustainability, followed by curricula, student activities, and university administration. (...) The most important ways to activate the university's role in promoting sustainability from students' perspectives were rated as very important. Statistically significant differences were found between the sample's responses, with females expressing more support in university administration. Academic specialization also influenced responses, with scientific specializations showing more favor in university administration, faculty members, and curricula. The researchers made several recommendations based on the findings. (shrink)

Islamic bioethics is in good health, this article argues. During the twentieth century, academic researchers had to deal with a number of difficulties including the scarcity of available Islamic sources. However, the twenty-first century witnessed significant breakthroughs in the field of Islamic bioethics. A growing number of normative works authored by Muslim religious scholars and studies conducted by academic researchers have been published. This nascent field also proved to be appealing for research-funding institutions in the Muslim world and also in (...) the West, such as the Qatar National Research Fund (QNRF) and the Netherlands Organization for Scientific Research (NWO). On the other hand, the article argues that contemporary Islamic bioethics is in need of addressing news issues and adopting new approaches for the sake of maintaining and improving this good health in the future. (shrink)

Older racialized minorities were particularly vulnerable during the last pandemic due to the interlocking influences of structural racism and ageism, which are often disregarded in public health planning. This oversight not only compromises the social justice and health equity goals of public health efforts but it also calls for a more inclusive approach that systematically addresses these deficiencies at every stage of a public health response. To achieve this, we propose Age- and Race-conscious Interventions done Equitably (ARIE), a novel analytical (...) framework grounded in critical race theory and critical gerontology. ARIE is based on a four-step approach, which aligns with different stages of public health interventions. It will help ensure that structural discrimination influencing access to healthcare resources during a biological event is not ignored, and that public health authorities work actively toward identifying and addressing ageist and racist biases in their response plans and interventions. (shrink)

The physical distancing measures necessitated by COVID-19 have resulted in a severe withdrawal from the patterns of daily life, necessitating significantly reduced contact with other people. To many, such withdrawal can be a major cause of distress. But, to some, this sort of withdrawal is an integral part of growth, a pathway to a more enriching life. The present study uses a sequential explanatory QUAN-qual design to investigate whether people who felt that their lives had changed for the better after (...) being forced to engage in physical distancing, what factors predicted such well-being, and how they spent their time to generate this sense of well-being. We invited 614 participants who reported closely following physical distancing recommendations to complete a survey exploring this topic. Our analyses, after controlling for all other variables in the regression model, found a greater positive association between presence of meaning in life, coping style, and self-transcendent wisdom and residualized current well-being accounting for retrospective assessments of well-being prior to physical distancing. An extreme-case content analysis of participants' personal projects found that participants with low self-transcendent wisdom reported more survival-oriented projects (e.g., acquiring groceries or engaging in distracting entertainments), while participants reporting high self-transcendent wisdom reported more projects involving deepening interactions with other people, especially family. Our findings suggest a more nuanced pathway from adversity to a deeper sense of well-being by showing the importance of not merely coping with adversity, but truly transcending it. (shrink)

By means of the averaging method of the first order, we introduce the maximum number of limit cycles which can be bifurcated from the periodic orbits of a Hamiltonian system. Besides, the perturbation has been used for a particular class of the polynomial differential systems.

During the initial phases of the COVID-19 pandemic, stress and anxiety were pervasive among the masses due to high morbidity and mortality. Besides the fear of coronavirus was also particularly driven by social media. Many people started to look for faith and spiritual connections to gain comfort. The role of spiritual ties and religious beliefs in relation to coping with pandemic stress gained the attention of researchers in some parts of the world. This cross-sectional survey aimed at assessing the intensity (...) of stress and anxiety symptoms experienced by people and how much they were alleviated by employing spiritual connections. The study sample comprises 795 respondents with 52% males and 48% females living in Saudi Arabia. The brief online study questionnaire collected data about background variables, anxiety and stress scale from DASS-21, and items from the WHOQOL instrument assessed the use of spiritual beliefs to cope. Multiple regression models were tested to determine the role of spiritual connections after adjusting demographic variables. Results illustrated that after adjusting for gender and age, participants' anxiety symptoms decreased by units with each unit increase in the use of spiritual connections, and participants’ stress symptoms reduce by units with each unit increase in coping with spirituality. Additionally, females’ risk to experience anxiety and stress symptoms was more than males and, respectively. An increase in age decreases the likelihood of experiencing anxiety symptoms and stress symptoms by and units respectively. Findings support the protective role of spiritual connections despite small beta coefficients. The social and cultural context in Saudi Arabia favors deep-rooted connections with spirituality and faith. Our findings support that the reliance on spiritual connections helped older people to deal with exaggerated fear during the initial phase of the COVID-19 pandemic and reduces the risk of experiencing anxiety and stress symptoms. Females and younger participants were relatively vulnerable to developing these symptoms. We discussed these findings considering some recent studies that reported similar relationships and made recommendations for future research. (shrink)

A new three-parameter extension of the generalized-exponential distribution, which has various hazard rates that can be increasing, decreasing, bathtub, or inverted tub, known as the Marshall-Olkin generalized-exponential distribution has been considered. So, this article addresses the problem of estimating the unknown parameters and survival characteristics of the three-parameter MOGE lifetime distribution when the sample is obtained from progressive type-II censoring via maximum likelihood and Bayesian approaches. Making use of the s-normality of classical estimators, two types of approximate confidence intervals are (...) constructed via the observed Fisher information matrix. Using gamma conjugate priors, the Bayes estimators against the squared-error and linear-exponential loss functions are derived. As expected, the Bayes estimates are not explicitly expressed, thus the Markov chain Monte Carlo techniques are implemented to approximate the Bayes point estimates and to construct the associated highest posterior density credible intervals. The performance of proposed estimators is evaluated via some numerical comparisons and some specific recommendations are also made. We further discuss the issue of determining the optimum progressive censoring plan among different competing censoring plans using three optimality criteria. Finally, two real-life datasets are analyzed to demonstrate how the proposed methods can be used in real-life scenarios. (shrink)

Glossina or tsetse flies, the vectors of sleeping sickness, form a unique group of insects with remarkable characteristics. They are viviparous with a slow rhythm of reproduction (one larva approximately every 10 days) determined by the regular ovulation of alternate ovaries. This unusual physiology enables the age of the females to be estimated by examining the ovaries.The resulting ovarian age structure of tsetse fly populations has been used to develop research into the demography of tsetse flies. Several authors have proposed (...) methods of estimating population growth rates from ovarian age distribution data. However, such methods are applicable only when the growth rate () is equal to 1 (i.e. the intrinsic rate of increase r is equal to 0). In fact, in this type of estimation, the adult survival rate a (or equivalently the mortality rate) cannot be dissociated from the growth rate. (shrink)

Educational technology, particularly Learning Management Systems (LMS), has seen significant growth in recent years. As LMS platforms have evolved rapidly, managing them effectively has become crucial for the success of online courses. Many institutions and organizations now focus on developing LMS solutions as part of their e-learning strategies. LMS platforms are used in various educational contexts, including campus-based, distance, classroom, online, traditional, modern, and massive open online courses. They integrate numerous technological tools to support and enhance each stage of the (...) learning process. In this context, user satisfaction is often discussed as a critical measure of LMS success. This study examines the primary factors influencing user satisfaction and the overall impact of LMS usage. It examines how these factors relate to student satisfaction and assesses LMS effectiveness. Data was gathered using a questionnaire based on previous research. The findings reveal that all identified factors positively impact student satisfaction, suggesting that greater user satisfaction leads to improved benefits for students. (shrink)

During the 1990s, biomedical scientists and Muslim religious scholars collaborated to construe Islamic responses for the ethical questions raised by the AIDS pandemic. This is the first of a two-part study examining this collective legal reasoning (ijtihād jamā‘ī). The main thesis is that the role of the biomedical scientists is not limited to presenting scientific information. They engaged in the human rights discourse pertinent to people living with HIV/AIDS, gave an account of the preventive strategy adopted by the World Health (...) Organization, and offered an (Islamic) virtue-based preventive model. Finally, these scientists tried to draft a number of Islamic legal rulings (aḥkām), usually seen in Islamic jurisprudence as the exclusive business of Muslim religious scholars. This multilayered role played by the scientists reflects intriguing developments in the Islamic religio-ethical discourse in general and in the field of Islamic jurisprudence in particular. (shrink)

This book offers the first comprehensive introduction to one of the most significant Arab thinkers of the late 20th century and the early 21st century: the Moroccan philosopher and social theorist Mohammed Abed al-Jabri. With his intellectual and political engagement, al-Jabri has influenced the development of a modern reading of the Islamic tradition in the broad Arab-Islamic world and has been, in recent years, subject to an increasing interest among Muslims and non-Muslim scholars, social activists and lay men. The contributors (...) to this volume read al-Jabri with reference to prominent past Arab-Muslim scholars, such as Ibn Rushd, al-Ghazali, al-Shatibi, and Ibn Khaldun, as well as contemporary Arab philosophers, like Hassan Hanafi, Abdellah Laroui, George Tarabishi, Taha Abderrahmane; they engage with various aspects of his intellectual project, and trace his influence in non-Arab-Islamic lands, like Indonesia, as well. His analysis of Arab thought since the 1970s as a harbinger analysis of the ongoing “Arab Spring uprising” remains relevant for today's political challenges in the region. (shrink)

The enlarging domain of psychiatric intervention is frequently associated with the undue medicalization of unusual experiences. In such a climate, it becomes of utmost importance to carefully choose appropriate candidates for the psychiatric gaze. This suggests a need to draw a distinction between religious experiences (with psychotic form) and pathological psychotic experiences. As Jackson and Fulford (1997) maintain, “spiritual experiences, whether welcome or unwelcome, and whether or not they are psychotic in form, have nothing (directly) to do with medicine. It (...) would be quite wrong, then, to “treat” spiritual psychotic experiences with neuroleptic drugs, just as it is quite wrong to “treat” political .. (shrink)

Mohammed Arkoun is one of the Muslim world's foremost thinkers. His efforts to liberate Islamic history from dogmatic constructs have led him to a radical review of traditional history. Drawing on a combination of pertinent disciplines ? history, sociology, psychology and anthropology ? his approach subjects every system of belief and non-belief, every tradition of exegesis, theology and jurisprudence to a critique aimed at liberating reason from the grip of dogmatic postulates. By treating Islam as a religion as well as (...) a time-honoured tradition of thought, Arkoun's work aims at overcoming the limitations of descriptive, narrative and chronological modes in history by recommending that the entire development of Islamic thought ? from Quranic to present-day fundamentalist discourses ? be subjected to a critical analysis guided by these categories. The expected outcome of such a strategy is an emancipated political reason working hand in hand with a truly creative imagination for a radical re-construction of mind and society in the contemporary Muslim world. (shrink)

The ethical climate in Turkey is beset by ethical problems. Bribery, environmental pollution, tax frauds, deceptive advertising, production of unsafe products, and the ethical violations that involved politicians and business professionals are just a few examples. The purpose of this study is to compare and contrast the ethical beliefs of American and Turkish consumers using the Ethical Position Questionnaire (EPQ) of Forsyth (1980), the Machiavellianism scale, and the Consumer Ethical Practices of Muncy and Vitell questionnaire (MVQ). A sample of 376 (...) subjects that consists of American consumers (n = 188) and Turkish consumers (n = 199) was used to compare the ethical beliefs and practices of the two samples. The MANOVA results for the two nationality groups found that five out of six criterion variables differed between the two groups. The implications of this study are intended to assist marketers to develop strategies that suit a particular market and lessen their risk of entry. (shrink)

Death is the opposite not of life, but of power. And as such, Mohammed Bamyeh argues in this original work, death has had a great and largely unexplored impact on the thinking of governance throughout history, right down to our day. In Of Death and Dominion Bamyeh pursues the idea that a deep concern with death is, in fact, the basis of the ideological foundations of all political systems. Concentrating on four types of political systems—polis, empire, theocracy, and modern mass (...) society systems—Bamyeh shows how each follows a specific strategy designed to pit power against the equalizing specter of death. Each of these strategies—consolation, expansion, preparation, and repression—produces a certain style of political behavior, as well as particular psychic traumas. In making his argument, Bamyeh revisits a wide range of empirical and theoretical discussions in existentialist philosophy, psychoanalysis, comparative historical sociology, literary studies, and anthropology. By demonstrating how schemes of power are by definition also schemes for defying death—despite their claims to the contrary—his book encourages us to think of a new style of politics, one oriented toward life. (shrink)

In this paper, we study the relationship between Economic Policy Uncertainty (EPU) and carbon dioxide (CO 2 ) emissions. Using an extensive dataset from 23 countries consisting of 6800 firm-year observations, we provide strong evidence that EPU increases firms’ CO 2 emissions. Our main inference is robust when using alternative measures of CO 2 emissions and EPU, alternative econometric specifications and samples, and several approaches to control for possible endogeneity. In a set of additional analyses, we first show that a (...) board’s characteristics (i.e., board gender diversity and board independence) significantly moderate the studied relationship. Second, cross-country characteristics (i.e., government effectiveness, control of corruption, and democracy) seem important in the relationship between EPU and CO 2 emissions. Our findings significantly contribute to the debate on firms’ ethical responsibility in managing climate change and CO 2 emissions. (shrink)

A Critique of Localized Realism Abstract In an attempt to avert Laudan’s pessimistic induction, Worrall and Psillos introduce a narrower version of scientific realism. According to this version, which can be referred to as “localized realism”, realists need not accept every component in a successful theory. They are supposed only to accept those components that led to the theory’s empirical success. Consequently, realists can avoid believing in dubious entities like the caloric and ether. This paper examines and critiques localized realism. (...) It also scrutinizes Psillos’s historical study of the caloric theory of heat, which is intended to support localized realism. (shrink)

RésuméDans le présent article, on expose la théorie aristotélicienne des comètes, bien diffusée en Occident musulman par le biais des commentaires d'Ibn Rušd et d'Ibn Bāǧǧa, et abordée trois siècles plus tard dans un manuscrit inédit attribué au fameux mathématicien Ibn Ġāzī al-Miknāsī. Dans ce traité qui ne figure pas dans la liste connue de ses écrits, Ibn Ġāzī traite de l'astrologie des comètes suivant Ptolémée, et insére une critique attribuée à Iḫwān al-Ṣafā’, caractérisée par le rejet de l'idée des (...) comètes sidérales. On s'intéresse également aux classifications des comètes données par Ibn Ġāzī et un autre auteur peu connu ‘Alī al-Antākī. Ainsi, nous avons constaté que le contenu du De cometis du pseudo-Ptolémée est analogue au le texte d'Ibn Ġāzī, et pratiquement identique au texte d'al-Antākī. Par la suite, on analyse les observations de comètes réalisées du ixe jusqu’à la fin du xixe s. en Afrique du Nord et en Espagne musulmane, et consignées dans certains manuscrits d'astronomie et chroniques en langue arabe, mais qui n'ont jamais fait l'objet d’études approfondies. Les observations étudiées sont : les deux comètes X/975 P1 et X/998 D1 signalées par un auteur anonyme du xve s., l'observation de la comète X/1381 V1 rapportée par Ibn al- Qāḍī, le passage de la comète de Halley en 1456 rapporté par Muḥammad al-Zarkašī, la comète en C/1743 X1 observée par ‘Abd al-Razzāq ibn Ḥamadūš, et qui confirme sa structure en éventail, les deux observations de Ibn ‘Alī al-Šrīf al-Šalāṭī de la D/1770 L1, et surtout son témoignage concernant la C/1769 P1 où il a inséré une représentation graphique inédite en Occident musulman. (shrink)