Extremely Fast NADH-Regeneration Using Phosphonic Acid as Hydride Source and Iridium-pyridine-2-sulfonamidate Catalysts

NADH is a very well known, high-energy, electron and proton carrier, successfully employed as cofactor in many large-scale biotransformation processes catalyzed by oxidoreductase enzymes. Owing to ..

An Overview of Verbal Violence by Teachers on Students at High School in Kupang City

This study aims to determine the impact of verbal violence by teachers on students at SMA Negeri Kupang. This study uses a qualitative research type. This research was conducted on three participants who were students of a state high school in Kupang City. Information about the two participants was revealed using semi-structured interviews. The sampling technique used is purposive sampling. This study uses a research instrument, namely the researcher himself. The data analysis technique used in this research is interpretative phenomological analysis. The main purpose of phenomological interpretive analysis is to identify how an individual interprets his life experience. The stages in this data analysis technique are repeated reading and taking notes, turning notes into themes, looking for relationships and grouping themes, and making reports on research results. The results of this study indicate that the three participants, namely PI, AH, KA felt the impact of verbal abuse by their teachers. All three participants felt unnoticed, cared for, and felt intimidated by their own teachers. This made the participants, PI, AH and KA feel ashamed of their classmates and other teachers and often skipped class. In addition, PI, AH and KA participants hoped that teachers would not treat other students as they did to them. This shows that verbal violence does have a psychological impact on students who experience it

Annular synthetic jet used for impinging flow mass-transfer

An annular synthetic jet was investigated experimentally, both with and without an opposing impingement wall. The experiments involved smoke visualization and mass transfer measurement on the wall by means of naphthalene sublimation technique. Two qualitatively different flow field patterns were identified, depending upon the driving amplitude level. With small amplitudes, vortical puffs maintain their identity for a relatively long time. If the amplitudes are large, breakdown and coalescence of the vortical train is much faster. Also the resultant mass transfer to the impingement wall is then much higher. Furthermore, a fundamental change of the whole flow field was observed at the high end of the investigated frequency range, associated with radical reduction of the size of the recirculation bubble

Experimental Investigations on Fluidic Control Over an Airfoil

International audienceThis study presents the development of two fluidic actuators − namely, microjets and tangential blowing actuator (TBA), designed for flow separation control. The developed actuators are compact enough to fit inside an ONERA D profiled wing with a chord of 0.35 m. Test bench experiments showed that the microjets (resp. TBA) were able to produce exit velocities up to 330 m/s (resp. 60 m/s). These actuators were placed in the model and were tested in wind tunnels for various blowing rates. The investigations included the use of force balance measurements, on-surface flow visualization with pigmented oil, off-surface flow visualizations with smoke, surface pressure distribution measurements, and Particle Image Velocimetry (PIV). Most of the tests were performed at free-stream velocities between 20 m/s (for PIV) and 40 m/s, corresponding to Reynolds numbers in the range 0.47 × 10^6−0.93 × 10^6 . The angle of attack varied from −2 to 20 degrees. Experiments were conducted using the naturally occurring laminar boundary layer as well as for a turbulent boundary layer. In such a case, rough strips were used in the vicinity of the leading edge. The present tests show the efficiency of these devices to delay separation and improve aerodynamic performances of the wing: for example, a maximum of 30% gain in CL has been reached using the microjets. Both actuators tend to increase the lift coefficient CL after stall and areas of separated flow have been eliminated by applying control, as suggested by flow visualizations and PIV velocity fields

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBANTUAN SOFTWARE SWISH MAX4 DENGAN MODEL PEMBELAJARAN FLIPPED CLASSROOM TERHADAP KEMANDIRIAN SISWA SMP

ABSTRAK Tujuan penelitian ini adalah sebagai berikut: Mengetahui cara serta langkah- langkah dalam mengembangkan dan mengetahui respon siswa terhadap media pembelejaran interaktif berbantuan software Swish Max4 dengan model pembelajaran Flipped Classroom terhadap kemandirian siswa SMP. Jenis penelitian pada penelitian yang akan dilakukan yaitu penelitian pengembangan (Research and Development). Model yang digunakan untuk penelitian ini adalah model penelitian ADDIE. Teknik Pengumpulan Data dengan Observasi, Wawancara, dan Angket. Instrumen Pengumpulan Data dalam penelitian ini sebagai berikut: Angket Validasi, Angket Respon siswa. Pengembangan media pembelajaran interaktif berbantuan software swish max4 dengan model pembelajaran flipped classroom terhadap kemandirian siswa yang dikembangkan memiliki kevalidan dengan kriteria valid dan sangat menarik, dengan rata-rata yang diperoleh ahli materi 3,44 dan rata-rata yang diperoleh dari ahli media 3,61. Respon siswa menunjukkan hasil skor rata-rata 3,52 pada uji lapangan kelompok kecil dan untuk uji kelompok besar diperoleh skor rata- rata 3,47 dengan kriteria untuk keduanya sangat menarik. Dengan demikian media yang dikembangkan menarik serta layak untuk siswa. Kata kunci: Media Pembelajaran Interaktif, Flipped Classroom, Software Swish Max4, Kemandiria

Penanaman Pendidikan Karakter Guna Membangun Kepribadian Berbangsa dan Bernegara

The purpose of this study is to analyze and describe how the current form of character education is in the midst of globalization and modernization which can be seen from how the characters are shown in social media and how the form of character planting should be in the life of the nation and state. The research method used is the method of the results of the study of national journals and the analysis of the use of social media that occurs in the community. The results of the study indicate a lack of full public awareness of the importance of character education and a decline in social values ​​and character which can be seen from self-expression in social media. The conclusion of the study is that character education for each individual needs to be strengthened with good and positive character contents starting at home, through school, and in everyday life in society.  Keywords: Character Education Plantin

The Effect of White Rot Fungus (Ganoderma sp) as Decomposers on Composting Using Combination of Cattle Feces and Water Hyacinth (Eichhornia crassipes) as Organic Matter

في إندونيسيا ، توجد فضلات الماشية ونبات صفير الماء (WH) بكثرة ولكن لم يتم الكشف عنها على نطاق واسع. حيث انه لم يتم تطبيق استخدام الكائنات الحية الدقيقة كمحللات في عملية التخمير على نطاق واسع،  لذلك بالفترة الاخيرة بدا الباحثون بالاهتمام واجراء مزيدا من الدراسة. تهدف هذه الدراسة إلى تقييم تأثير مزيج CF مع WH على التسميد عن طريق تطبيق الكائنات الحية الدقيقة الفطرية العفن الأبيض (WRF) كمحلل. عدد من ستة أنواع من العلاج مقارنة بـ R1 (نسبة CF: WH) (25٪: 75٪) + WRF ؛ R2 (نسبة CF: WH) (50٪: 50٪) + WRF ؛ R3 (نسبة CF: WH) (75٪: 25٪) + WRF ؛ R4 (نسبة CF: WH) (25٪: 75٪) بدون WRF ؛ R5 (نسبة CF: WH) (50٪: 50٪) بدون WRF ؛ R6 (نسبة CF: WH) (25٪: 75٪) بدون WRF. أوضحت النتائج أن استخدام محللات WRF والمواد العضوية (CF و WH) بنسب مختلفة تتأثر بخصائص السماد مثل قيمة الأس الهيدروجيني ، C- عضوي ، N- عضوي ، نسبة C / N ، P2O5 و K2O. ينخفض ​​محلل WRF بشكل كبير إلى قيمة الرقم الهيدروجيني ونسبة C / N ، ولكنه يزيد من قيمة C- عضوي ، N- عضوي ، P2O5 و K2O. تتوافق خصائص السماد المنتج مع المعايير التي حددها المعيار الوطني الإندونيسي (INS) ولوائح وزارة الزراعة في جمهورية إندونيسيا. كان من الضروري اعتبار WRF كمحلل في إنتاج السماد. وبناءً على نتائج الدراسة ، تم التوصل إلى أن علاج R1 (CF: WH) (25٪: 75٪) + WRF) كان أفضل توليفة لإنتاج السماد باستخدام WRF كمحلل بأفضل الخصائص.In Indonesia, cattle feces (CF) and water hyacinth (WH) plants are abundant but have not been widely revealed. The use of microorganisms as decomposers in the fermentation process has not been widely applied, so researchers are interested in studying further. This study was to evaluate the effect of the combination of CF with WH on composting by applying white-rot fungal (WRF) (Ganoderma sp) microorganism as a decomposer. A number of six types of treatment compared to R1(ratio of CF:WH)(25%:75%)+WRF; R2(ratio of CF:WH)(50%:50%)+WRF; R3(ratio of CF:WH)(75%:25%)+WRF; R4(ratio of CF:WH)(25%:75%) without WRF; R5(ratio of CF:WH)(50%:50%) without WRF; R6(ratio of CF:WH)(25%:75%) without WRF. The results showed that the use of WRF decomposers and organic matter (CF and WH) at different ratios affected the properties of compost such as pH value, C-organic, N-organic, C/N ratio, P2O5 and K2O compounds. The WRF decomposer significantly decreases to the pH value, and the C/N ratio, but increases the value of C-organic, N-organic, P2O5 and K2O. The properties of the compost produced are in accordance with the standards set by the Indonesian National Standard (INS) and the regulation of the Ministry of Agriculture of the Republic of Indonesia. The WRF was needed to consider as a decomposer in producing compost.  Based on the results of the study, it was concluded that the R1(CF: WH)(25%:75%)+WRF) treatment was the best ratio combination to produce compost using WRF (Ganoderma sp) as a decomposer with the best properties

Synthesis of collagen from Bali cattle's hide using a combination of acid and alkali on the extracting process

The process of pre-extraction is an important stage in the process of collagen synthesis. This stage increases the sensitivity of collagen molecule chains that can affect production yields and collagen properties. The objectives of the study were to synthesize and evaluate halal collagen from Bali cattle’s hide on different -extracting processes. A total of 5 treatments applied in this study, namely: T1 = Ca(OH)2 5% (b/v) ; T2= Ca(OH)2 15% (b/v) ; T3= Ca(OH)2 5% + CH3COOH 5%(b/v) ; T4= Ca(OH)2 15% + CH3COOH 5% (b/v). Each treatment was repeated 4 times. Data were analyzed in a variety of ways using SPSS program. The observed parameters consisted of: 1) yield, 2) viscosity and 3) pH. The results showed that the difference in real pre-extracting process increased the yield and viscosity, but not the pH value. The application of T4 treatment provided the best results compared to other treatments as well as controls to increase the yield and also improve the collagen's physical properties and pH