A study of some features of ac and dc electric power systems for a space station

This study analyzes certain selected topics in rival dc and high frequency ac electric power systems for a Space Station. The interaction between the Space Station and the plasma environment is analyzed, leading to a limit on the voltage for the solar array and a potential problem with resonance coupling at high frequencies. Certain problems are pointed out in the concept of a rotary transformer, and further development work is indicated in connection with dc circuit switching, special design of a transmission conductor for the ac system, and electric motors. The question of electric shock hazards, particularly at high frequency, is also explored. and a problem with reduced skin resistance and therefore increased hazard with high frequency ac is pointed out. The study concludes with a comparison of the main advantages and disadvantages of the two rival systems, and it is suggested that the choice between the two should be made after further studies and development work are completed

From mouse to man:predicting biased effects of beta-blockers in asthma

This article is a Commentary on Thanawala VJ, Valdez DJ, Joshi R, Forkuo GS, Parra S, Knoll BJ, Bouvier M, Leff P and Bond RA (2015). Beta‐blockers have differential effects on the murine asthma phenotype. Br J Pharmacol 172: 4833–4846. doi: 10.1111/bph.13253. The authors reply in Bond RA (2016). Differences in asthma study models and the effectiveness of β(2)‐adrenoceptor ligands: response to Lipworth et al. Br J Pharmacol 173: 250–251. doi: 10.1111/bph.13334

De Hiroshima à Éroshima : Une érotique de la bombe atomique en forme de haïku selon Dany Laferrière

L’Orient n’est pas au coeur des préoccupations de Dany Laferrière, dont les ouvrages s’inscrivent pour la plupart dans une géographie retraçant un parcours personnel, de son île natale, Haïti, à son premier lieu d’exil, Montréal. Pourtant, son second texte, Éroshima, est tissé de motifs issus de la culture japonaise. L’auteure analyse ici le statut ambigu de cette thématique asiatique qui véhicule un grand nombre de stéréotypes. Elle s’attache à montrer comment le narrateur livre une réflexion sur la prégnance du cliché et tente de la déjouer en adoptant un mode poétique étranger à la pensée occidentale.The Orient is not a major theme for Dany Laferrière, whose works generally recreate the geography of his personal trajectory from his native island of Haiti to Montreal, the first location of his exile. However, his second text, Éroshima, is made up of motifs from Japanese culture. The author of this article analyzes the ambiguous status of Éroshima’s Asian theme, which is the vehicle for a large number of stereotypes. She shows that the narrator is offering a reflection on the resonance of cliché while attempting to outmaneuver it by adopting a poetic mode foreign to Western thought

Norms Governing the Interstate Use of Force: Explaining the Status Quo Bias of International Law

It is generally held that states interact with one another in a state of anarchy, at least when it comes to national security. After defining international law, I show that this is not completely accurate. Reflecting a status quo bias, classic invasions and territorial aggrandizement through force are illegal. Since 1945, states that have undertaken classic invasions have generally been sanctioned, and no state has taken territory from another by force since 1976

Health Perception and Behavior Changes in Survivors of the Acute Respiratory Distress Syndrome

The Acute Respiratory Distress Syndrome (ARDS) is a severe illness with a 40% mortality rate. Improvements in care have reduced deaths but led to an increasing number of survivors who experience chronic adverse effects. However, there are no published studies that have evaluated changes in health perceptions and behavior in ARDS survivors. We sought to determine changes in health-related perceptions and behaviors in ARDS survivors. A sequential mixed methods study was conducted to examine changes in health perceptions and behaviors in ARDS survivors. Respondents were registrants at the ARDS Foundation, a non-profit patient support and education organization. Findings from interviews conducted with ARDS survivors during the initial qualitative phase were used to construct a quantitative survey instrument, which was completed by 229/513 (45%) registrants. Changes were reported in the following behaviors before and after ARDS: diet (34% and 31% consumed more fruits and vegetables, respectively, now than before ARDS, while 4% and 6%, respectively, said they consume less), physical activity (64% exercise now vs. 50% before, p\u3c0.01), alcohol use (2.3+7.6 drinks/week now vs.4.2+10.6 before, p\u3c0.001), and medical care needs (10.6+15.5 doctor visits now vs. 3.7+6.8 before, p\u3c0.001). ARDS survivors reported mostly positive health perception and behavior changes after their illness.https://scholarworks.waldenu.edu/archivedposters/1012/thumbnail.jp

SUBJECTIVE WELL BEING, PERILAKU AGRESIF DAN ATTRIBUTIONAL STYLE PADA REMAJA YANG BERASAL DARI KELUARGA BROKEN HOME

Penelitian ini bertujuan untuk mengetahui hubungan antara subjective well-being, perilaku agresif dan attributional style. Partisipan dalam penelitian ini adalah 402 orang remaja (72,6% perempuan) berusia 13-19 tahun yang berasal dari keluarga broken home. Instrumen yang digunakan dalam penelitian ini adalah PANAS, Aggression Quesstionnaire, dan The Attributional Style Questionnaire; ketiganya diadaptasi ke dalam Bahasa Indonesia dan diujicobakan terlebih dahulu. Hasil uji korelasi Spearman menemukan bahwa adanya hubungan negatif yang signifikan antara subjective well being dengan perilaku agresif (rs = 0,430), dan antara attributional style dengan perilaku agresif (rs = -0,111). Temuan ini selaras dengan temuan-temuan sebelumnya yang menyatakan bahwa attributional style jenis optimism dan subjective well-being berhubungan negatif dengan perilaku agresif. Adapun penelitian ini mengonfirmasi bahwa keterkaitan tersebut tidak hanya muncul pada sampel remaja secara umum, tetapi secara spesifik juga muncul remaja yang mengalami broken home

PEMANFAATAN LIMBAH PADAT PROSES SINTESIS FURFURAL DENGAN MATERIAL AWAL AMPAS TEBU SEBAGAI BAHAN PEMBUATAN BAHAN BAKAR BRIKET (UTILIZATION OF SOLID WASTE OF SYNTHESIS FURFURAL PROCESS FROM STARTING MATERIAL BAGASSE AS A SUBSTANCE OF MAKING BRIQUETTE FUEL)

Pendekatan, strategi, metode, dan teknik pembelajaran pada hakikatnya dapat dibedakan tetapi tidak dapat dipisahkan. Keempat istilah tersebut merupakan satu kesatuan dalam pembelajaran. Pendekatan, strategi, metode, dan teknik pembelajaran yang akan dan/atau sedang digunakan dapat diketahui dari langkah-langkah pembelajaran yang telah tersusun dan/atau sedang terjadi. Pendekatan pembelajaran adalah cara umum dalam memandang pembelajaran. Sedangkan strategi pembelajaran adalah ilmu dan kiat di dalam memanfaatkan segala sumber belajar yang dimiliki dan/atau yang dapat dikerahkan untuk mencapai tujuan pembelajaran yang telah ditetapkan. Metode mengajar adalah berbagai cara kerja yang bersifat relatif umum yang sesuai untuk mencapai tujuan pembelajaran tertentu dan teknik pembelajaran adalah ragam khas penerapan suatu metode sesuai dengan latar penerapan tertentu. Teknik pembelajaran mengambarkan langkah-langkah penggunaan metode mengajar yang sifatnya lebih operasional. Faktor-faktor yang perlu diperhatikan dalam penentuan teknik pembelajaran di antaranya adalah kemampuan dan kebiasaan guru, ketersedian sarana dan waktu, serta kesiapan siswa. Faktor-faktor yang perlu dipertimbangkan dalam memilih strategi pembelajaran ialah tujuan pembelajaran, jenis dan tingkat kesulitan materi pelajaran, sarana, waktu yang tersedia, siswa, dan guru

Seasonal Variations in Antioxidant Activity, Total Flavonoids Content, Total Phenolic Content, Antimicrobial Activity and Some Bioactive Components of Ficus carica L. in Palestine

The genus Ficus is one of the largest genera of angiosperms with more than 800 species. This study aimed at investigating the pharmacological properties of Ficus carica linn. Leaves were collected in two seasons (May and October) and were extracted by Soxhlet extractor with different percentages of methanol-water, ethanol-water and pure water solvents. 100% methanol and 95% ethanol offered the highest yield (about 23%). Those extracts were further extracted/partitioned with nbutanol. May samples showed higher TPC, TFC and AA results than October samples. The ethanolbutanol extract had the highest TPC results (150.7±0.5 mg GA/g extract), while methanol-butanol extract showed the highest results for TFC and AA (350±4.3 mg Rutin/g extract and 368.1±1.9 mg FeSO4/g extract, respectively). Ethanol and methanol extracts were weakly active against E. coli, while the extracts showed good inhibition activity against oral flora, where October samples gave higher activity than May samples. Some components of extracts were analyzed by a newly developed HPLCPDA method. Eight compounds were identified: chlorogenic acid, caffeic acid, syringic acid, coumaric acid, rutin and trans-cinnamic acid. Quercetin was identified after acid hydrolysis of extracts in all sample extracts, while ferulic acid was present in water extract only