Asas penerbangan

Buku ini mengandungi beberapa bab iaitu kandungan: bab 1 sejarah ringkas tentang aeronautik, bab 2 anatomi pesawat udara, bab 3 sifat daya-daya aerodinamik: analisis matra, bab 4 teori dan ujikaji: terowong angin, bab 5 atmosfera, bab 6 aliran satu matra tak boleh mampat, bab 7 aliran satu matra di dalam bendalir boleh mampat, bab 8 aliran dua matra: daya angkat dan seret, bab 9 sayap terhingga, bab 10 kesan kelikatan, bab 11 penentuan jumlah daya seret tak boleh mampat, bab 12 daya seret keboleh mampatan, bab 13 aerofoil dan sayap, bab 14 sistem daya angkat tinggi, bab 15 gayalaku aerodinamik, bab 16 kestabilan dan kawalan, bab 17 pendorongan, bab 18 struktur, bab 19 aliran hipersonik, bab 20 trajektori roket dan orbit, lampiran a ciri-ciri atmosfera piawai, lampiran b penerbitan persamaan bernoulli bendalir boleh mampat, lampiran c ringkasan persamaan-persamaan keadaan dan aliran satu matra serta indeks

Fractal Dimensions of a Fractured Formation in the Rondane Mountain Plateau, Norway

publishedVersio

Genomic Organization, Splice Variants and Expression of CGMl, a CD66-related Member of the Carcinoembryonic Antigen Gene Family

The tumor marker carcinoembryonic antigen (CEA) belongs to a family of proteins which are composed of one immunogiobulin variable domain and a varying number of immunoglobulin constant-like domains. Most of the membrane-bound members, which are anchored either by a glycosylphosphatidylinositol moiety or a transmembrane domain, have been shown to convey cell adhesion in vitro. Here we describe two splice variants of CGMI. a transmembrane member of the CEA family without immunoglobulin constant.like domains. CGM1a and CGM1c contain cytopiasmic domains of 71 and 31 amino acids, respectively, The cytoplasmic region of CGM1a is encoded by four exons (Cyt1-Cyt4). Differential splicing of the Cyt1 exon (53 bp)..

Reliability and Effectiveness of the Differential Transformation Method for Solving Linear and Non-Linear Fourth order Boundary Value Problems

In this paper, differential transformation method is applied to construct analyticsolutions of the boundary value problems for linear and non-linear 4th order nonhomogenousdifferential equations. The differential transformation method istested using three physical model problems. Results are presented in tables andfigures. It was appeared in comparing results of the differential transformationmethod with Rung- Kutta , and RK-Butcher solutions that the differentialtransformation method is more reliable and effective in solving linear and nonlineardifferential equations

Solving Second Order Non-Linear Boundary Value Problems by Four Numerical Methods

The boundary value problems for the 2nd order non-linear ordinarydifferential equations are solved by using four numerical methods. Thesenumerical methods are Rung-Kutta of 4th order, Rung–Kutta Butcher of 6th order,differential transformation method, and the Homotopy perturbation method. Threephysical problems from the literature are solved by the four methods for comparingthe results. The results were presented in tables and figures. The differentialtransformation method appeared to be effective and reliable to find the seminumerical-analytical solutions for such type of boundary value problems

The Foldable Comic Based on Bengkulu Folktales to Enhance Elementary Students’ HOTS and Social Awarenes

The development of foldable comic media is highly appealing as a learning tool. This development initiative stems from research aimed at enhancing high-level thinking skills and social awareness among fourth-grade elementary school students. The process involved direct observation of a school and its students, followed by the implementation of foldable comic media as a learning tool. The research and development model used in this study is the Borg and Gall model. The subjects for testing in this research included content experts for the foldable comic's material and presentation experts to validate its visual elements. Additionally, a limited trial was conducted to assess the effectiveness of the developed product. Data collection instruments used in this research and development included validation and effectiveness questionnaires. Data analysis was carried out through both qualitative and quantitative methods. Based on the results of product operational tests, it was found that the use of folding comic media based on Bengkulu folklore could increase learning outcomes at the level of students' Higher Level Thinking Ability in cycle I obtained an average of 59.46 then increased in cycle II with an average of 75.71, students' social care attitudes in cycle I obtained an average of 69.00%, increasing in cycle II with an average of 85.40%. Thus, Folded Comic Media Based on Bengkulu Folklore is effective in improving Higher Level Thinkin

أثر عناصر أنموذج الاعمال في تعزيز عملية اتخاذ القرارات الإدارية: دراسة استطلاعية لآراء عينة من العاملين في مديرية بلدية الموصل

يهدف البحث الحالي إلى معرفة أثر عناصر أنموذج الأعمال في تعزيز عملية اتخاذ القرارات الادارية في مديرية بلدية الموصل، إضافة إلى إيضاح المداخل والأشكال والمراحل الملائمة لتعزيز عمليات اتخاذ القرارات في المديرية المبحوثة، ولتحقیق ما هدف إليه تبنى البحث المنهج (الوصفي التحلیلي) في تقديمه للأطر الفكریة، ومعالجته للبيانات وتحلیلها ومن ثم تفسیرها، بعد أن تم تحدید مجتمع الدراسة في عدد من التشكيلات التابعة لمديرية بلدية الموصل، واختيار عینة عشوائیة، بلغ حجمها (338) فرداً، بوصفها عینة ممثلة لمجتمع البحث البالغ (2320) فرداً، كما واعتمد الباحث لجمع بيانات الجانب التطبيقي استمارة (الاستبانة) بوصفها الأداة الرئيسة للبحث،  إلى جانب مجموعة من الأدوات والأسالیب الإحصائیة، لتحلیل إجابة الأفراد المبحوثين إشتملت على (الوسط الحسابي، الانحراف المعیاري، نسبة الاستجابة، معاملي الاختلاف والارتباط، وتحلیل علاقتي التأثير والارتباط)، من خلال الاستعانة بالحزم الإحصائية المتمثلة بـ (SPSS V.26)، ليتوصل البحث إلى مجموعة من الاستنتاجات تمثل أهمها بوجود أثر معنوي لأنموذج الأعمال على عملية تعزيز اتخاذ القرارات في مديرية بلدية الوصل، ليختتم البحث بمجموعة من المقترحات تمثل أهمها بضرورة وضع منهج علمي وواضح في اتخاذ القرارات يمكن استخدامه في شتى القطاعات، وكذلك التدريب عليه للوصول إلى آلية عمل معتمدة تقلل من الأخطاء الناتجة عن القرارات العشوائية غير المدروسة، وبحث أثر تحسين اتخاذ القرارات على تحقيق الرضا الوظيفي لكافة العاملين، فضلا عن إقامة ورش مكثفة للقيادات الإدارية في بلدية الموصل حول متغيرات البحث لأهميتها ودورها في تحسين الخدمات المقدمة للمستفيدين منها

Historical volcanism and the state of stress in the East African Rift System

Crustal extension at the East African Rift System (EARS) should, as a tectonic ideal, involve a stress field in which the direction of minimum horizontal stress is perpendicular to the rift. A volcano in such a setting should produce dykes and fissures parallel to the rift. How closely do the volcanoes of the EARS follow this? We answer this question by studying the 21 volcanoes that have erupted historically (since about 1800) and find that 7 match the (approximate) geometrical ideal. At the other 14 volcanoes the orientation of the eruptive fissures/dykes and/or the axes of the host rift segments are oblique to the ideal values. To explain the eruptions at these volcanoes we invoke local (non-plate tectonic) variations of the stress field caused by: crustal heterogeneities and anisotropies (dominated by NW structures in the Protoerozoic basement), transfer zone tectonics at the ends of offset rift segments, gravitational loading by the volcanic edifice (typically those with 1-2 km relief) and magmatic pressure in central reservoirs. We find that the more oblique volcanoes tend to have large edifices, large eruptive volumes and evolved and mixed magmas capable of explosive behaviour. Nine of the volcanoes have calderas of varying ellipticity, 6 of which are large, reservoir-collapse types mainly elongated across rift (e.g. Kone) and 3 are smaller, elongated parallel to the rift and contain active lava lakes (e.g. Erta Ale), suggesting different mechanisms of formation and stress fields. Nyamuragira is the only EARS volcano with enough sufficiently well-documented eruptions to infer its long-term dynamic behaviour. Eruptions within 7 km of the volcano are of relatively short duration (<100 days), but eruptions with more distal fissures tend to have lesser obliquity and longer durations, indicating a changing stress field away from the volcano. There were major changes in long-term magma extrusion rates in 1977 (and perhaps in 2002) due to major along-rift dyking events that effectively changed the Nyamuragira stress field and the intrusion/extrusion ratios of eruptions

SARS-CoV-2 infection and lung cancer : potential therapeutic modalities

Human coronaviruses, especially SARS-CoV-2, are emerging pandemic infectious diseases with high morbidity and mortality in certain group of patients. In general, SARS-CoV-2 causes symptoms ranging from the common cold to severe conditions accompanied by lung injury, acute respiratory distress syndrome in addition to other organs’ destruction. The main impact upon SARS-CoV-2 infection is damage to alveolar and acute respiratory failure. Thus, lung cancer patients are identified as a particularly high-risk group for SARS-CoV-2 infection and its complications. On the other hand, it has been reported that SARS-CoV-2 spike (S) protein binds to angiotensin-converting enzyme 2 (ACE-2), that promotes cellular entry of this virus in concert with host proteases, principally transmembrane serine protease 2 (TMPRSS2). Today, there are no vaccines and/or effective drugs against the SARS-CoV-2 coronavirus. Thus, manipulation of key entry genes of this virus especially in lung cancer patients could be one of the best approaches to manage SARS-CoV-2 infection in this group of patients. We herein provide a comprehensive and up-to-date overview of the role of ACE-2 and TMPRSS2 genes, as key entry elements as well as therapeutic targets for SARS-CoV-2 infection, which can help to better understand the applications and capacities of various remedial approaches for infected individuals, especially those with lung cancer