An infrared singularity in the damping rate for longitudinal gluons in hot QCD

We calculate $\gamma_l(0)$, the damping rate for longitudinal on-shell gluons with zero momentum in hot QCD using the hard-thermal-loop (htl) scheme. We find it to be divergent in the infrared, which means that in this scheme $\gamma_l(0)$ is different from $\gamma_t(0)$, the corresponding damping rate for transverse gluons which is known to be finite. This result suggests that the htl scheme is infrared sensitive and thus may need to be improved upon in this sector. We discuss this issue after we present our calculation.Comment: 11 pages, RevTeX. Two signs corrected. Same result but substantially rewritten with more emphasis on the infrared problem. References adde

Étude Longitudinale de la Santé Mentale chez les Étudiants Primo-Inscrits de l’Université de Sfax

Intérêt et objectif de l’étude : Notre étude vise à évaluer la santé psychologique chez les étudiants primo-inscrits de l’université de Sfax et d’identifier certains facteurs psychosociaux qui peuvent impacter leur santé. Méthodes : Il s’agit d’une étude longitudinale qui s’est déroulée sur deux temps. Notre échantillon est composé de 344 étudiants primo-inscrits dans des filières scientifiques et littéraires qui ont été sollicités au début et à la fin de l’année universitaire 2017-2018. Seulement 252 étudiants ont participé à la deuxième étape de la recherche. Des échelles ont été traduites en arabe pour répondre aux objectifs de la recherche. Résultats : Les données indiquent que 42.7% des étudiants interrogés présentent des signes de détresse psychologique. Nos résultats révèlent que plusieurs facteurs sont associés à cette détresse d’une manière statistiquement significative, à savoir la satisfaction des conditions socio-économiques, le choix de la filière (subi ou délibéré) et la satisfaction du soutien social et des conditions de l’hébergement au campus universitaire. Certains facteurs transactionnels sont corrélés d’une manière significative à notre variable dépendante «la santé psychologique », à savoir le stress perçu et les stratégies d’ajustement et avec certains facteurs de personnalité comme l’estime de soi, le névrosisme et l’espoir. L’analyse de régression multiple indique que l’estime de soi et le névrosisme expliquent, respectivement à 31% et à 7%, la variance santé psychologique. Les résultats de l’étude longitudinale montrent l’amélioration générale de l’état de santé des étudiants interrogés lors du deuxième moment de l’étude avec un impact statistiquement significatif des facteurs de l’estime de soi et du coping centré sur la résolution des problèmes et l’espoir Conclusion :Un travail d’accompagnement psychologique centré sur les facteurs de protection s’avère plus que nécessaire pour éviter le basculement de cette détresse dans des troubles psychiatriques.   Interest and objective of the study: Our study aims to assess the psychological health of first-time students enrolled at the University of Sfax and to identify certain psychosocial factors that can impact their health. Methods: This is a longitudinal study that took place over two periods. Our sample is made up of 344 first-time students enrolled in science and literature courses who were contacted at the beginning and end of the 2017-2018 academic year. Only 252 students participated in the second stage of the research. Scales were translated into Arabic to meet the research objectives. Results: The data indicate that 42.7% of the students surveyed show signs of psychological distress. Our results reveal that several factors are associated with this distress in a statistically significant way, namely the satisfaction of socio-economic conditions, the choice of the sector (submitted or deliberate) and the satisfaction of social support and the conditions of the school. accommodation at the university campus. Some transactional factors are significantly correlated with our dependent variable “psychological health”, namely perceived stress and coping strategies and with some personality factors such as self-esteem, neuroticism and hope. . Multiple regression analysis indicates that self-esteem and neuroticism explain, respectively, 31% and 7%, of the psychological health variance. The results of the longitudinal study show the general improvement in the state of health of the students questioned during the second moment of the study with a statistically significant impact of the factors of self-esteem and coping centered on the resolution of problems. problems and hope. Conclusion: Psychological support work centered on protective factors is more than necessary to avoid the tipping of this distress into psychiatric disorders

Étude Longitudinale de la Santé Mentale chez les Étudiants Primo-Inscrits de l’Université de Sfax

Intérêt et objectif de l’étude : Notre étude vise à évaluer la santé psychologique chez les étudiants primo-inscrits de l’université de Sfax et d’identifier certains facteurs psychosociaux qui peuvent impacter leur santé. Méthodes : Il s’agit d’une étude longitudinale qui s’est déroulée sur deux temps. Notre échantillon est composé de 344 étudiants primo-inscrits dans des filières scientifiques et littéraires qui ont été sollicités au début et à la fin de l’année universitaire 2017-2018. Seulement 252 étudiants ont participé à la deuxième étape de la recherche. Des échelles ont été traduites en arabe pour répondre aux objectifs de la recherche. Résultats : Les données indiquent que 42.7% des étudiants interrogés présentent des signes de détresse psychologique. Nos résultats révèlent que plusieurs facteurs sont associés à cette détresse d’une manière statistiquement significative, à savoir la satisfaction des conditions socio-économiques, le choix de la filière (subi ou délibéré) et la satisfaction du soutien social et des conditions de l’hébergement au campus universitaire. Certains facteurs transactionnels sont corrélés d’une manière significative à notre variable dépendante «la santé psychologique », à savoir le stress perçu et les stratégies d’ajustement et avec certains facteurs de personnalité comme l’estime de soi, le névrosisme et l’espoir. L’analyse de régression multiple indique que l’estime de soi et le névrosisme expliquent, respectivement à 31% et à 7%, la variance santé psychologique. Les résultats de l’étude longitudinale montrent l’amélioration générale de l’état de santé des étudiants interrogés lors du deuxième moment de l’étude avec un impact statistiquement significatif des facteurs de l’estime de soi et du coping centré sur la résolution des problèmes et l’espoir Conclusion :Un travail d’accompagnement psychologique centré sur les facteurs de protection s’avère plus que nécessaire pour éviter le basculement de cette détresse dans des troubles psychiatriques.   Interest and objective of the study: Our study aims to assess the psychological health of first-time students enrolled at the University of Sfax and to identify certain psychosocial factors that can impact their health. Methods: This is a longitudinal study that took place over two periods. Our sample is made up of 344 first-time students enrolled in science and literature courses who were contacted at the beginning and end of the 2017-2018 academic year. Only 252 students participated in the second stage of the research. Scales were translated into Arabic to meet the research objectives. Results: The data indicate that 42.7% of the students surveyed show signs of psychological distress. Our results reveal that several factors are associated with this distress in a statistically significant way, namely the satisfaction of socio-economic conditions, the choice of the sector (submitted or deliberate) and the satisfaction of social support and the conditions of the school. accommodation at the university campus. Some transactional factors are significantly correlated with our dependent variable “psychological health”, namely perceived stress and coping strategies and with some personality factors such as self-esteem, neuroticism and hope. . Multiple regression analysis indicates that self-esteem and neuroticism explain, respectively, 31% and 7%, of the psychological health variance. The results of the longitudinal study show the general improvement in the state of health of the students questioned during the second moment of the study with a statistically significant impact of the factors of self-esteem and coping centered on the resolution of problems. problems and hope. Conclusion: Psychological support work centered on protective factors is more than necessary to avoid the tipping of this distress into psychiatric disorders

Insecurite dans les Points de Transfert d’Argent Mobile Money a Abidjan

Cet article s’est proposé d’étudier l’insécurité dans l’activité du mobile money. Pour la collecte des données, l’observation directe, l’étude documentaire, le questionnaire et l’entretien ont été nécessaires. L’analyse mixte des données recueillies, conduite auprès de 100 individus, a montré que la criminalité est une réalité malgré les actions des forces de sécurité. Aussi, la crainte et la peur ressentis par les citoyens développent un sentiment d’insécurité. Au regard des possibilités de réduire le chômage, d’accompagner les jeunes dans l’entrepreneuriat que prône le gouvernement et l’inclusion financière que ces services offrent, il est important de lutter efficacement contre ce phénomène.   This article has proposed to study the insecurity in the mobile money business. For data collection, the direct observation, the documentary study, the questionnaire and the interview were necessary. The mixed analysis of the data collected, conducted with 100 individuals, showed that crime is a reality despite the actions of the security forces. Also, the fear and fear felt by citizens develop a feeling of insecurity. In view of the possibilities of reducing unemployment, supporting young people in entrepreneurship that the government advocates and the financial inclusion that these services offer, it is important to fight effectively against this phenomenon

A potential infrared problem with the damping rates for gluons with soft momentum in hot QCD

We calculate the damping rate $\gamma_l$ for longitudinal gluons with zero momentum in finite high temperature QCD and show that some of its contributing terms are infrared divergent. This is in contrast with the expectation that this damping rate is to be equal to the corresponding one $\gamma_t$ for transverse gluons which is known to be finite. Our calculation was motivated by the fact that similar divergent terms occur when we calculated in a previous work $\gamma_t$ to order $p^2$, p being the momentum of the gluon. After we present our results, we briefly discuss them.Comment: 10 pages, TeX fil

Peran Kepala Desa Meningkatan Partisipasi Anggota USAha Ekonomi Desa Simpan Pinjam (Ued-sp) Mekar Maju di Desa Tanjung Medang Kecamatan Rupat Utara Kabupaten Bengkalis Tahun 2012-2015

The role of the village head is as a motivator and community mobilizer; Facilitators, planners, implementers, controllers, supervisors and tutors; And mediators between communities and governments. The role of Village Head to increase community participation is part of efforts to accelerate the level of community welfare development in Tanjung Medang Village.The purpose of this study is to: (1) Know the factors that cause low level of participation activities of members of Economic Enterprises Savings and Savings Village Forward; (2) Describe the Village Head's Role to Increase the Participation of Members of the Savings and Borrowed Country-Owned Economic Enterprises in Tanjung Medang Village. This research uses qualitative research method with descriptive research type, which can be interpreted as problem solving process which is investigated by describing the state of research subject based on facts that appear during the research which then continued with based on the existing theories. Data analysis is done by data reduction, data presentation, and conclusion or verification. The subjects of this study were the Village Head, the Chairman of the Village Consultative Board (BPD), the UED-SP Mekar Maju management, the Village Assistant, the Community Leader and the UED-SP Mekar Maju Member.Based on the results of this study concluded that with the role of village head then the level of public participation in activities UED-SP Mekar Maju in Tanjung Medang Village is increasing. But the fact that the participation of the less active community is caused by several factors, namely the mindset of the community is a factor that influences the progress of UED-SP Mekar Maju, a closed or passive mindset is a factor that hampers public participation in UED-SP Mekar Maju program. Inhibiting factors in the role of village heads to the community: lack of cooperation or coordination between village and village heads, village heads who are less sociable with communities and communities who are less concerned with the environment

Infrared Behavior of High-Temperature QCD

The damping rate \gamma_t(p) of on-shell transverse gluons with ultrasoft momentum p is calculated in the context of next-to-leading-order hard-thermal-loop-summed perturbation of high-temperature QCD. It is obtained in an expansion to second order in p. The first coefficient is recovered but that of order p^2 is found divergent in the infrared. Divergences from light-like momenta do also occur but are circumvented. Our result and method are critically discussed, particularly regarding a Ward identity obtained in the literature. When enforcing the equality between \gamma_t(0) and \gamma_l(0), a rough estimate of the magnetic mass is obtained. Carrying a similar calculation in the context of scalar quantum electrodynamics shows that the early ultrasoft-momentum expansion we make has little to do with the infrared sensitivity of the result.Comment: REVTEX4, 55 page

The Toxicity Effect of N. P. K. Agro -Fertilizer on Oreochromis Niloticus Fingerlings, the Pysiological Impact.

The study on the acute toxicity level of inorganic fertilizer (N. P. K., 20: 10: 10) to the fingerlings of Oreochromis niloticus (mean weight 0.9 ± 0.6g) was investigated using static bioassays over a period of 96hrs intervals. The 96 hours LC50 of the exposed fishes was also determined to be 0.82sg/L with lower and upper confidence limits of 0.6 and 1.15g/L respectively. However certain stressful behavioural changes like erratic swimming with inconsistent jumping, incessant gulping of air, loss of balance, were commonly observed before death, which occurs with increase in the time of exposure. Water quality determined during the investigation showed fluctuation in oxygen content and increase in Ph, Conductivity and total dissolved solute as the concentration of the fertilizer was increased. The increased stress behavioral pattern among this fish is as a result of the increased effect of the fertilizer. Keywards: Effects, fertilizer, Oreochromis Niloticus, fingerlings, water

Effet de la composition de différents substrats culturaux sur quelques paramètres de croissance de Gambeya lacourtiana De Wild en pépinière au nordest du Gabon

Objectif : Les connaissances en matière de gestion des ressources phytogénétiques en zone tropicale humide sont encore limitées au regard de la variabilité biologique existante. Un programme de multiplication d'espèces forestières a été entrepris au nord-est du Gabon. La simplicité des techniques et leur faible coût ont favorisé la production de milliers de plants. Nos travaux s’intègrent dans ce projet afin d’évaluer les effets de la composition de trois substrats culturaux sur quelques paramètres de croissance de Gambeya lacourtiana De Wild (Sapotacées) en pépinière.Méthodologie et résultats : Cette expérimentation en sachets de film plastique de polyéthylène a été conduite en 2010 à Ipassa (Gabon) en conditions naturelles d’éclairement, de température et d’hygrométrie. Trois substrats culturaux S1 (30% sable + 70% terre noire), S2 (20% terre noire + 70% sciure de bois + 10% sable) et S3 (70% cendre de bois + 30% sable) ont constitué le milieu de culture. Après la préparation manuelle des substrats, les sachets remplis ont été placés suivant un dispositif en blocs complément randomisés à vingt (20) unités expérimentales. Les résultats ont montré que le substrat S1 a induit le meilleur accroissement des plants. Le substrat S3 s’est révélé nocif à la croissance des plantules. La présence de sciure de bois dans le substrat S2 s’est montrée inefficace pour la germination des graines, mais ce substrat a donné des performances acceptables sur la croissance longitudinale des plantules.Conclusion et application : L’apport de matière organique serait donc plus bénéfique pour la croissance des plantules de G. lacourtiana alors qu’un milieu composé de sable et de terre humifère reste suffisant pour la germination de semences.Mots clés : multiplication végétale, substrat cultural, paramètres de croissance, Gambeya lacourtiana, Gabon.Effects of the composition of different farming substrates on some growth parameters of Gambeya lacourtiana De Wild in seedbed in north-eastern of GabonABSTRACTObjective: Knowledge in plant resources management in tropical rainfall area is still limited because of the great biological variability existing. A program of multiplication of wild species was undertaken in the northeastern of Gabon. The simplicity of the techniques and their low costs supported the production of thousands of seedlings. Our study integrates this project with a view to evaluate the effects of the composition of three farming substrates on some growth parameters of Gambeya lacourtiana De Wild (Sapotaceae) in seedbed.Methodology and Results: This experiment in polyethylene bags took place in 2010 at Ipassa (Gabon) based on natural conditions of lightness, temperature and relative humidity. Three substrates S1 (30% sand + 70% black soil), S2 (20% black soil + 70% sawdust +10% sand) and S3 (70% wood + 30% sand) were used as culture media. After manual preparation of substrate, bags filled were placed according to a complete with twenty (20) repetitions. Results show that the substrate S1 was found to induce the best increase of planlets. The chemical composition of the S3 substrate appeared to be harmful on the growth of the plantlets. The presence of sawdust in the S2 substrate was ineffective for the germination of seeds, but this substrate gave suitable performances on the longitudinal growth of the seedlings.Conclusion and Application: Organic matter is more required for the growing of plantlets of G. lacourtiana while a substrate composed by sand and black soil is efficient for the seedlings germination.Key-words: vegetative multiplication, farming substrate, growth parameters, Gambeya lacourtiana, Gabon