بن فرحات ساعد , شهرزاد صالحي

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة فرحات عباس - سطيف1 · الجزائر

علي عبد الله, فايزة بريش

كلية العلوم الاقتصدية وعلوم التسيير‎-جامعة سعد دحلب - البليدة-جامعة سعد دحلب - البليدة · الجزائر

Farouk Ahmed Salih, Maarouf Ibrahim Mohammed

كلية الزراعة-جامعة الخرطوم · السودان

The study was conducted in Khartoum State for two years (2002-2003) and at two locations (Shambat and Islang). The objective was to investigate the possibility of local development of forage hybrid sorghum [Sorghum bicolor (L.) Moench] using 4 local stocks as pollinators and 7 introduced genetic stocks sterilized in A3 cytoplasm as females. The commercial hybrid ‘Panar 888’ was used as standard check. The material was evaluated for agronomic performance and the proximate analysis for some forage quality traits was undertaken. Combining ability study was performed using line x tester analysis and the magnitude of average heterosis, heterobeltiosis and standard heterosis were investigated. Highly significant differences were detected among entries for all characters studied. Partitioning of the entry source of variation revealed significant differences among the various subgroups of entries for all characters. The interaction of entry and its various subgroups with location, unlike that with years, was insignificant for all characters. The second order interactions with hybrids and their parents were insignificant for all characters; however, the comparatively low mean squares of hybrids, pointed to their relative consistency over environments compared to parents. Many hybrids excelled the parental lines in forage yield and some of the yield-related traits. The hybrids : E-35-1 x S. 70, E-35-1 x S. 186, E-35-1 x Garawi and Dale x S.70 significantly out-yielded the commercial hybrid ‘Panar 888’ and the parental lines derived from the local cultivar ‘Abu Sab’in’. The increase in yield attained by these hybrids was attributed to the increase in stem diameter and plant height. The commercial hybrid excelled the experimental hybrids in leaf to stem ratio, tillering and regrowth. The proximate analysis for neutral detergent fiber, crude fiber and Ash indicated that the overall nutritive value of hybrids was better than their parents. Crude protein percentages of hybrids averaged slightly lower compared to their parents. However, this was suggested to be mitigated by the improved intake potential of hybrids. The heterosis study revealed that significant gains in forage yield over mid-parent, better parents and the commercial hybrid ‘Panar 888’ were exhibited by some hybrids indicating that the superiority over the existing maxima in forage yield has been demonstrated. Hybrids with the best heterotic effects for forage yield and at the same time maintaining good performance for this character were those involving the line E-35-1 with the testers : S. 70, S. 186 and Garawi, plus Dale x S.70, Hastings x S. 70 and Sugar Drip x Ankolib. Of these, the hybrids Dale x S.70 and Hastings x S. 70 displayed the best compromise between forage yield, earliness and quality traits. In contrast, the hybrids involving E-35-1 showed undesirable heterosis for earliness and some quality traits. Generally, the means of average heterosis and heterobeltiosis indicated that the general trend for heterotic effects were towards increased forage yield, plant height, stem thickness, tillering, regrowth and reduced leaf to stem ratio. Significant general (GCA) and specific (SCA) combining ability effects in the desirable direction were detected for most agronomic and quality traits. The best general combiners for forage yield were E-35-1 and Dale from lines and S. 70 (selection from Abu Sab’in) from testers. Dale was given the top priority as it maintains desirable GCA effects for many other characters including quality traits. E-35-1, although better than Dale in GCA for forage yield, it turned out to be the poorest general combiner for earliness in flowering, a character highly needed under the prevailing forage production system in the Sudan. It was concluded that economic evaluation may validate the utility of the of E-35-1 hybrids, especially in the highly specialized animal-products sector, where lateness in flowering is not a major problem. Blue Ribbon from lines and Garawi (traditional Sudan grass cultivar) from testers were promising general combiners for earliness. Garawi was also a promising general combiner for leaf to stem ratio, regrowth and tillering, but was the poorest for forage yield. Since Garawi is a highly heterogeneous cultivar, it was suggested that its GCA for forage yield might be improved by selection. Ankolib from testers was also a good general combiner for leaf to stem ratio. For quality traits, Dale from lines and S. 70 from testers were the best general combiners for neutral detergent fiber, followed by the line Hastings and the tester S. 186. The line Hastings was also the best general combiner for crude protein. Blue Ribbon and Sugar Drip from lines and Ankolib from testers were the best general combiners for Ash. The best SCA effects for forage yield were obtained by Sugar Drip x Ankolib followed by Blue Ribbon x Ankolib. Other hybrids with significant SCA effects for forage yield include : E-35-1 x Garawi, Dale x S.70, Hastings x S.70 and E.35-1 x S.186. All these hybrids were among the best yielders, but their yield ranks were not necessarily similar to those of their SCA effects. For earliness in flowering, the best specific effects were shown by E-35-1 x Ankolib, Dale x Ankolib, and Hastings x Garawi. For leaf to stem ratio, the best specific effects were shown by N 100 x Ankolib followed by E-35-1 x Ankolib. The best SCA effects for regrowth were shown by Sugar Drip x S.186, Dale x Garawi and N 100 x S.70. With few exceptions, both general and specific effects were important in the expression of all characters, with general effects being more important than the specific ones. Consequently, both additive and non-additive gene actions were important in the expression of most characters with the preponderance of additive gene actions for days to flower, forage yield, stem diameter, leaf to stem ratio and non-additive actions for plant height and regrowth. The exception being number of tillers per plant which appears to be mainly under the control of additive effects. General effects were more stable over years than specific effects. Interactions of genetic effects with years were more pronounced than those with locations. It was postulated that, testing over years at one location with increased number of replications, might be of value for combining ability evaluation. The contributions of either lines or testers to the total variance were higher than those of line x tester for all characters other than plant height and regrowth. The variability observed among both parental groups was in most cases, not coinciding with their contribution to the total variance. It was suggested that high variability among a parental group did not necessarily imply high contribution of that group to the total variance of the crosses. Selection in early generations might be effective in improving characters predominately controlled by additive genes like number of tillers per plant and days to flower. For characters like forage yield, leaf to stem ratio and regrowth in which both additive and non-additive gene actions were important, it was pointed that the A3 sterility source will preclude the employment of reciprocal recurrent selection in their improvement. Alternatively, heterosis breeding was recommended for forage yield improvement, but for leaf to stem ratio and regrowth, it was suggested that heterosis breeding must be preceded by a selection program based on more genetically diverse material with increased number of lines. Since the exotic material may transfer traits not adapted to the local production system, the choice for local x local hybrids was highly recommended. Male-sterilizing the local stocks in A3 cytoplasm was therefore suggested to benefit from the wide range of variability known to exist in sorghum in the Sudan. Preliminary selection within local stocks was suggested to eliminate undesirable traits or to include some easily inherited desirable traits like juiciness.

إسماعيل حجازي, سارة بوروبة

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة محمد خيضر - بسكرة · الجزائر

هدفت هذه الدراسة إلى التعرف على أثر الإبداع الإداري بأبعاده المختلفة على أداء العاملين اتجاهات العاملين في الشركة الجزائرية لإنجاز المشاريع الصناعية -حاسي مسعود –Sarpi والتي يبلغ عدد الأفراد بها(1463)في مختلف المستويات، و لاختيار عينة الدراسة تم استخدام طريقة العينة العشوائية البسيطة والتي بلغ حجمها (60) عامل وعاملة ،حيث تم توزيع استبانة عليهم من خلال عدة زيارات ميدانية ، واسترد منها (55) استبانة صالحة للتحليل الإحصائي ، وقد استخدم المنهج الوصفي التحليلي للوصول إلى نتائج الدراسة ، وتم الاعتماد على عدة أساليب إحصائية لتحليل البيانات منها مقياس الإحصاء الوصفي ، تحليل الانحدار البسيط، التباين .وتوصلت الدراسة إلى عدة نتائج أهمها وجود أثر ذو دلالة إحصائية للإبداع الإداري على مستوى أداء شركةsarpi وذلك عند مستوى الدلالة ((α=0.05، حيث فسر متغير الإبداع الإداري (58.9%) من التغيرات الحاصلة على مستوى أداء المؤسسة محل الدراسة ، وذلك بلإعتماد على قيمة معامل التحديد ²R.كما تقترح الدراسة العديد من الاقتراحاتعلى إدارة الشركة أهمها متابعة الأفكار التي تتسم بمخاطرة عالية وتشجيع العاملين على العمل ضمن فرق تسودها روح المجازفة، ووضعإستراتيجية مبنية على معايير دقيقة للكشف عن المبدعين والموهوبين من المديرين والعمل على تدريبهم لتوفير قيادات إدارية مؤهلة قادرة على استثمار طاقاتها الإبداعية في تطوير أداء المورد البشري.

Fateh Bougherra , Fatima Bensedid, Lamia Elfodil

كلية علوم الطبيعة والحياة-جامعة سعد دحلب - البليدة · الجزائر

L’Algérie est un pays connu pour ses produits laitiers traditionnels, qui se transmettent depuis des générations. Ces produits sont issus de la transformation de lait dans le but de prolonger sa durée de conservation. Parmi les préparations laitières traditionnelles algériennes, le Smen ce produit ancestral peut être une source de molécules à propriétés nutritionnelles, antioxydantes et antimicrobiennes.L’étude du procédé d’élaboration du Smen de la région de M’sila a permis de mettre en valeur un produit de terroir typique de la région, réalisé par de matériaux naturels en utilisant des méthodes traditionnelles et ancestrales.

خديجة لعمري, البشير صغير , فتحي بوقنينة

معهد العلوم الاقتصادية والتجارية وعلوم التسيير-المركز الجامعي صالحي أحمد - النعامة · الجزائر

khadouja Youbi , lahouaria Boudaoud , Zahra Youbi

كلية العلوم والتكنولوجيا-جامعة أحمد دراية - أدرار · الجزائر

Les cellules solaires à base du cadmium préstt des caractéristiques de sortie très intéressantes pour les systèmes photovoltaïques .par contre cet élémt prést est très toxique pdant sa manipulation et sa fabrication. Pour cela, on va essayer d'étudier un nouveau type de cellule solaire à base du Cds dopé par un élémt des métaux de transition tel que : AL, Cu et Ag , et de voir les caractéristiques de sortie de la cellule. Donc on va essayer de réduire la pollution de l'vironnemt. fr

محمد مهدي الشبري , وسام حسين خسباك

كلية التربية للعلوم الانسانية-جامعة كربلاء · العراق

Jorge Dias , Lakmal Seneviratne , Reem K. Ashour

جامعة خليفة · الامارات

Remote tele-operation systems are mainly designed for the sole purpose of transferringthe human operators control/manipulation capability to a Remotely OperatedVehicles (ROV) located slave system, to directly interacts with the environment,with the use of a master system by maximizing the telepresence of the operator.The awareness to surrounding environment in teleoperation is reduced as a result ofphysical separation between the human operator and the vehicle. The teleoperatorlacks the existence of various multiplesensory information such as sound, motions,and vibrations of the airframe unlike the pilot onboard of a manned aircraft, whoperceptibly has all of these characteristics. Only visual information, such as cameraimages with limited resolution and view of the field, are usually provided to theoperator and the lower the situation awareness, the less safety the teleoperation is.In this thesis, haptic based bilateral shared autonomous system is designed anddeveloped for a Remotely Operated Vehicle (ROV) in indoor environments. Theproposed control and interface guides the human operator to navigate ROV in orderto control and interact with uncertain indoor environments safely and precisely inthe absence of visual feedback. The bilateral shared control inputs interface for themaster and slave are designed based on both the velocity signals of the ROV andthe scaled position of the local master haptic manipulator. The master input interfacealso combines reflected remote interaction interface between slave and remoteenvironments. The remote interaction force applies to the human operator handsthrough a haptic device providing situational awareness about surrounding environmentof the remotely operated vehicle. In this thesis, we first develop reflectedinput interaction forces generated by using four different force fields as artificialforce field, the basic risk force field, parametric risk field, virtual impedance forcefields modeled as spring model and spring-damper model. Then, we implementedand evaluated the proposed control and interaction interface on unmanned groundvehicle and unmanned micro aerial vehicle in simulation and experimental environment.The evaluation results showed that, compared with an artificial force fieldbased interface, the interface designed by using virtual impedance forces provides better situational awareness about the remote environment guiding the operator tonavigate and control ROV safely and precisely in uncertain indoor environments inthe absence of visual feedback. Date of Award 2015 Original language American English Supervisor Jorge Dias (Supervisor)

Donald R. Drew, Salim J. Jabbour

كلية سليمان العليان لإدارة الأعمال -الجامعة الأمريكية في بيروت-الجامعة الأمريكية في بيروت · لبنان