Synchrotron radiation in a chromo-magnetic field

We study the generalization of QED synchrotron radiation to the QCD case with a chromomagnetic field using the Schwinger {\it et al} source method. It is shown that the QED case can be obtained as a special limit. The comparison with the path integral approach of Zakharov has shown consistent results.Comment: Accepted for publication in Phys. Rev.

Self-regulation of Arabic reading comprehension of upper Elementary students

Este estudio examina los procesos de autorregulación de la comprensión lectora en árabe de los estudiantes libaneses en la escuela primaria superior que tienen un rendimiento deficiente solo en este idioma. La atención se centra en las estrategias cognitivas y metacognitivas que utilizan estos estudiantes y en los componentes motivacionales de la autorregulación. Un cuestionario y dos entrevistas semiestructuradas diferentes se administraron a quince estudiantes de primaria y a sus profesores de árabe en una escuela francófona en Beirut. Los participantes no autorregulan de manera eficiente su comprensión de lectura en árabe y tienden a usar rara vez estrategias de aprendizaje cognitivo. Los procesos de autorregulación se predicen por la falta de motivación de los participantes, que se manifiesta principalmente a través de percepciones de moderada autoeficacia del desempeño y bajas expectativas de éxito. Este es el primer paso hacia la comprensión de los procesos de aprendizaje de los estudiantes con bajo rendimiento en lectura árabe. Puede proporcionar medios que ayudarán a los estudiantes a aplicar el aprendizaje de contenido autorregulado no solo de textos en árabe, sino también de lecturas en general.This study examines the self-regulation processes of reading comprehension in Arabic of Lebanese students in upper elementary who perform poorly only in this language. The focus is on the cognitive and metacognitive strategies these students use, and on the motivational components of self-regulation. A questionnaire and two different semi-structured interviews were administered to fifteen elementary students and to their Arabic teachers, in a French-speaking school in Beirut. Participants do not self-regulate efficiently their Arabic reading comprehension and they tend to seldom use cognitive learning strategies. Self-regulatory processes are predicted by participants’ lack of motivation that manifests itself mostly through perceptions of moderate self-efficacy of performance and low expectations of success. This is the first step towards understanding the learning processes of students poorly performing in Arabic reading. It can provide means that will help students in applying self-regulated content learning of not only texts in Arabic but readings in general.peerReviewe

VARIASI MAKANAN KERANG TAHU (Meretrix meretrix) DI PERAIRAN MUARA SUNGAI WANGGU KOTA KENDARI SULAWESI TENGGARA

Kerang tahu (Meretrix meretrix) merupakan salah satu biota yang hidup di perairan muara Sungai Wanggu Kota Kendari Sulawesi Tenggara yang diduga telah mengalami tekanan ekologi dan variasi makanan kerang belum diketahui secara pasti. Penelitian ini bertujuan untuk menganalisis variasi jenis makanan kerang tahu (M. meretrix). Penelitian dilaksanakan pada bulan Agustus-Oktober 2021. Pengamatan variasi makanan kerang tahu (M. meretrix) dilakukan di Laboratorium Produktivitas dan Lingkungan Perairan (Prolink) Fakultas Perikanan dan Ilmu Kelautan Universitas Halu Oleo. Analisis yang digunakan yaitu indeks kepenuhan lambung, frekuensi kemunculan, luas relung dan tumpang tindih. Hasil analisis menunjukkan variasi makanan terbagi dalam 3 kelompok yaitu fitoplankton, zooplankton dan material tidak teridentifikasi (MTT). Indeks kepenuhan lambung berdasarkan bulan pengamatan (0,95-1,00%), jenis kelamin jantan (1,00%) betina (0,93%) dan tertinggi pada kelas ukuran 28-31 mm yaitu (1,22%). Frekuensi kemunculan tertinggi berdasarkan bulan dan jenis kelamin nilai tertinggi didapatkan pada Oscillatoria angusta dan Biddulphia sp. sedangkan berdasarkan kelas ukuran tertinggi Oscillatoria tenuis dan Biddulphia sp. Nilai luas relung tertinggi didapatkan pada bulan Agustus (8,25), jenis kelamin betina (8,12) dan tertinggi pada kelas ukuran 40-43 mm (8,33). Nilai tumpang tindih tertinggi diperoleh pada bulan Agustus-September 0,97. Variasi makanan pada kerang tahu cenderung menyukai kelompok fitoplankton didominasi jenis O. angusta dan Biddulphia sp.Kerang tahu (Meretrix meretrix) merupakan salah satu biota yang hidup di perairan muara Sungai Wanggu Kota Kendari Sulawesi Tenggara yang diduga telah mengalami tekanan ekologi dan variasi makanan kerang belum diketahui secara pasti. Penelitian ini bertujuan untuk menganalisis variasi jenis makanan kerang tahu (M. meretrix). Penelitian dilaksanakan pada bulan Agustus-Oktober 2021. Pengamatan variasi makanan kerang tahu (M. meretrix) dilakukan di Laboratorium Produktivitas dan Lingkungan Perairan (Prolink) Fakultas Perikanan dan Ilmu Kelautan Universitas Halu Oleo. Analisis yang digunakan yaitu indeks kepenuhan lambung, frekuensi kemunculan, luas relung dan tumpang tindih. Hasil analisis menunjukkan variasi makanan terbagi dalam 3 kelompok yaitu fitoplankton, zooplankton dan material tidak teridentifikasi (MTT). Indeks kepenuhan lambung berdasarkan bulan pengamatan (0,95-1,00%), jenis kelamin jantan (1,00%) betina (0,93%) dan tertinggi pada kelas ukuran 28-31 mm yaitu (1,22%). Frekuensi kemunculan tertinggi berdasarkan bulan dan jenis kelamin nilai tertinggi didapatkan pada Oscillatoria angusta dan Biddulphia sp. sedangkan berdasarkan kelas ukuran tertinggi Oscillatoria tenuis dan Biddulphia sp. Nilai luas relung tertinggi didapatkan pada bulan Agustus (8,25), jenis kelamin betina (8,12) dan tertinggi pada kelas ukuran 40-43 mm (8,33). Nilai tumpang tindih tertinggi diperoleh pada bulan Agustus-September 0,97. Variasi makanan pada kerang tahu cenderung menyukai kelompok fitoplankton didominasi jenis O. angusta dan Biddulphia sp

Constraints in the market chains for export of Sudanese sheep and sheep meat to the Middle East

The objective of this publication is to analyse the causes of declining market share of Sudanese sheep and sheep meat in the Middle East market, especially in the Saudi market, by examining the constraints in the export supply chains. The following major factors are hypothesized to explain constraints limiting export to Saudi Arabia: there are specific export requirements for quality assurance and safety of Sudanese sheep and sheep meat, and there are rules and procedures in place in Sudan to test, certify and assure supply of quality and safe animals and meat to the Saudi importers. However, these are inadequate and inefficient to match the SPS standards of the importing country; multiple intermediaries are involved along the market chains resulting in several points of taxation along the value chains; this leads to increased transaction costs which lower competitiveness; domestic livestock markets are spatially integrated and therefore can respond quickly to varying import demand requirements. A market chain framework linking producers and importers through the intermediate markets and actors was used to analyse these factors. Both secondary and primary survey data were used to generate evidence on these factors

Factors that Influence the Demand of Using Subsidized Home Loan in Java Island

Penelitian ini meneliti tentang faktor-faktor yang mempengaruhi permintaan KPR bersubsidi di Pulau Jawa. Tujuan dari penelitian ini yaitu untuk menganalisis pengaruh kepadatan penduduk, pendapatan perkapita, jumlah angkatan kerja dan jumlah penduduk miskin terhadap permintaan KPR bersubsidi di Pulau Jawa. Data yang digunakan dalam penelitian ini adalah data sekunder. Data sekunder tersebut diambil dari laporan tahunan Badan Pusat Statistik dari tahun 2011-2017 dan dianalasis menggunakan analisis regresi linear berganda. Berdasarkan penelitian ini, hasil yang didapat ialah bahwa kepadatan penduduk, pendapatan per kapita, jumlah angkatan kerja dan jumlah penduduk miskin secara bersama-sama berpengaruh terhadap jumlah permintaan KPR bersubsidi. Menurut hasil analisis regresi yang dilakukan terhadap permintaan KPR bersubsidi di Pulau Jawa, secara parsial bahwa angkatan kerja berpengaruh positif, kepadatan penduduk, pendapatan perkapita dan penduduk miskin berpengaruh negatif terhadap permintaan KPR bersubsidi di Pulau Jawa. Implikasi dari hasil penelitian ini adalah merealisasikan KPR bersubsidi di daerah pinggiran kota yang masih sepi pemukiman oleh Kementerian PUPR dengan penambahan penyediaan kuota rumah yang telah disepakati anggarannya oleh Kementerian Keuangan. Demi melindungi penduduk berpenghasilan menengah yang ingin hidup sejahtera, perlu adanya revisi keputusan menteri mengenai aturan batasan pendapatan maksimal. Untuk melindungi tenaga kerja yang ingin mengajukan KPR bersubsidi, yang dilakukan pemerintah ialah mengajukan perjanjian kerja sama dengan Badan Penyelenggara Jaminan Sosial (BPJS) Ketenagakerjaan. Kerja sama yang dilakukan berupa pinjaman uang muka yang diberikan ke peserta yang berhak mendapatkan KPR subsidi. Sedangkan untuk penduduk miskin yang bekerja di sektor informal, mereka dapat memiliki rumah melalui program KPR mikro yang difasilitasi Bank Tabungan Negara (BTN) yang ditujukan khusus MBR yang berpenghasilan tidak tetap

Modulation of mitochondrial dynamics, bioenergetics and the innate antiviral immune response in Zika Virus infected Retinal cells

Modulation of mitochondrial dynamics and bioenergetics in Zika Virus infected retinal cells Karim Dirani1, Sneha Singh1, Shailendra Giri2, Ashok Kumar1 1 Department of Ophthalmology, Visual and Anatomical Sciences, and Kresge Eye Institute, Wayne State University School of Medicine, Detroit, MI 2 Department of Neurology, Henry Ford Health Systems, Detroit, MI Purpose: In addition to the powerhouse of the cells and regulation of apoptosis, mitochondria are being increasingly recognized in playing crucial role in modulating innate immune response in viral infections. In this study, we sought to determine the impact of mitochondrial dynamic (fission, fusion, and mitophagy) and bioenergetics status in regulating antiviral innate response to Zika virus (ZIKV) infection. Methods: Human ARPE-19 cells were infected with ZIKV (strain PRVABC59) at MOI of 1. The mitochondria were visualized for fission and fusion process using TOM20 and mitotracker dyes while the mitochondrial membrane potential was measured using JC-1 staining. The temporal expression of key genes/molecules involved in mitochondrial dynamic was assessed by RT-qPCR and Western blot. ARPE-19 cells stably expressing individual ZIKV genes were used to assess the functional role of viral proteins in altering mitochondrial dynamics. The bioenergetics activity of the cells was assessed using Seahorse XF analyzer for monitoring oxygen consumption rate (OCR) and Extracellular acidification rate (ECAR) upon ZIKV infection and with individual viral proteins. Results: All cells tested were permissive to ZIKV infection, as evidenced by a time dependent increase in virion production and immunostaining of viral antigen in the cells. Infected cells exhibited an increase in the expression of antiviral (e.g., IFNs, ISG15, MX1, OAS2) and inflammatory mediators (e.g., CCL5, TNFa). Amongst the molecules regulating the mitochondrial fission and fusion, levels of p-Drp1, mitofusins (MFN1, MFN2), and Opa1 were altered at both mRNA and protein levels. Similarly, molecules regulating mitophagy, PINK1/Parkin -dependent and independent pathways were modulated in ZIKV infected cells. Among individual viral proteins, the non-structural proteins exerted profound effects on mitochondrial dynamic. This correlated with a decrease in OCR response upon ZIKV infection. Interestingly, the pharmacological inhibition of Drp1 reduced ZIKV replication. Conclusion: Collectively, our data indicates that ZIKV virus modulates mitochondrial dynamics and individual ZIKV proteins exert differential effects on bioenergetics and antiviral innate immune response of infected cells. Targeting mitochondrial dynamic may provide new therapeutic avenues for antiviral therapy against ZIKV infection

Improvement in Adherence to Surgical Antimicrobial Prophylaxis Guidelines after Implementation of a Multidisciplinary Quality Improvement Project

Objectives: This study aimed to show the impact of a multidisciplinary quality improvement project on adherence to antimicrobial prophylaxis guidelines in oncological surgery. Methods: This pre- and post-intervention prospective observational study was carried out at the King Hussein Cancer Centre (KHCC) in Amman, Jordan, between August 2009 and February 2012. The quality improvement project consisted of revising the institutional guidelines for surgical antimicrobial prophylaxis, assigning a clinical pharmacist to the surgical department, establishing an operating room satellite pharmacy and providing education regarding the appropriate utilisation of antibiotics. The medical records of adult cancer patients who underwent surgery were evaluated one month before and one month after the project was implemented to assess adherence to the guidelines with regards to antibiotics prescribed, drug doses and timing and treatment duration. Results: A total of 70 patients were evaluated before and 97 patients were evaluated after the intervention, of which 57 (81.4%) and 95 (97.9%) patients received antibiotics, respectively. In comparing the pre- and post-intervention groups, an improvement was observed in the proportion of patients who received antibiotics at the appropriate time (n = 12 versus n = 79; 21.1% versus 83.2%; P <0.01), for the appropriate duration of time (n = 22 versus n = 94; 38.6% versus 99.0%; P <0.01) and in the appropriate dose (n = 9 versus n = 87; 56.3% versus 98.9%; P <0.01). Conclusion: Adherence to the antimicrobial prophylaxis guidelines at KHCC improved significantly after the implementation of a quality improvement project

Technology-Related Research in HRD Publications: An Analysis of Content and Metaperspectives from 2000 to 2006.

This study explores the presence of technology-related research in HRD, identifies what the research addressed, and analyzes how the research was addressed. We reviewed 1,675 papers in five publications. During the seven-year period examined, 169 articles were technology-related. Through a content analysis, we identified the topics of those articles, methodological approaches, organizational settings represented in the research, the fields of the researchers, and the papers\u27 orientation toward research and practice. In comparison to the total articles in each publication, the highest percentage of technology research was published in conference proceedings

Two-year outcome of an observe-and-plan regimen for neovascular age-related macular degeneration treated with Aflibercept.

The purpose of our study was to investigate the two-year outcome of Aflibercept treatment for neovascular age-related macular degeneration (nAMD), using the Observe-and-Plan regimen, an individually planned treatment regimen, based on the predictability of an individual's need for retreatment, aiming to reduce the clinical burden. Our prospective study used the Observe-and-Plan regimen with Aflibercept to treat nAMD: Three loading doses, followed by monthly observation visits until the disease-recurrence interval was determined, which then was shortened by 2 weeks in a treatment plan for the next three injections without intermediate monitoring visits. The subsequent treatment plans were adjusted according to periodically assessed disease activity. The primary outcome measures were visual acuity changes, number of injections, and number of monitoring visits. The study included 112 eyes of 102 patients with a mean age of 80.7 years (SD 7.6). Mean visual acuity (VA) improved from 61.8 ETDRS letters (20/60(+2)) at baseline, by 8.5, 8.0, and 6.2 letters at months 3, 12 and 24, respectively. Mean central retinal thickness was 438um at baseline, and reduced by 152um, 155um, and 150um at months 3, 12 and 24, respectively. The mean number of injections was 8.7 and 6.5 in the first and second year, respectively. The mean number of monitoring visits after baseline was 3.8 and 2.8 during the first and second year, respectively. The Observe-and-Plan regimen significantly improved VA, while fewer monitoring visits were needed as compared to other variable dosing regimens, thus reducing the workload for chronic care management of nAMD