bluuebunny/crossref_metadata_2025 huggingface dataset:
Menjaga Kesehatan Mental Dengan Pengelolaan Kecemasan di Masa Pandemi Covid 19
Authors: Sairah Sairah
Published: December 2021

Corona Virus Deasease – 19 (Covid-19) merupakan sebuah penyakit baru yang sedang dialami di seluruh negara. Penyakit ini diyakini sebagai penyakit berbahaya bagi manusia dikarenakan penyebarannya yang cepat, serta menyerang saluran pernapasan manusia. Oleh karena itu, WHO sebagai organisasi kesehatan dunia membuat sebuah kebijakan yakni membatasi mobilitas masyarakat untuk keluar rumah, memakai masker, serta menjaga kebersihan diri sebagai pencegahan terhadap virus Corona (2019, WHO). Penyebaran Pandemi COVID 19 di seluruh dunia tidak hanya berdampak pada kesehatan fisik tetapi juga kesehatan mental. Salah satu dampak pandemi terhadap kesehatan mental yaitu perasaan cemas akan terpapar virus dan ketidakpastian kondisi selama pandemic. Kecemasan perlu dikelola dengan baik agar tetap dapat membuat kewaspadaan, namun tidak berlebihan sehingga menyebabkan gangguan kesehatan jiwa yang lebih buruk. Tulisan ini bertujuan untuk menjelaskan bagaimana mengelola kecemasan di masa pandemic bagi masyarakat dengan pendekatan sttudi literature. Dari perspektif psikologi ini penulis menyimpulkan bahwa mengelola cemas pada tingkat proporsional, adalah hasil dari persepsi situasi yang berulang. Itu pemilihan informasi yang diterima selama pandemic adalah kunci untuk mengelola kecemasan. Selanjutnya, beradaptasi dengan perubahan yang terjadi sehingga bisa melalui hidup sehat di tengah pandemi.
Komitmen Organisasi dengan Organizational Citizenship Behavior pada Karyawan
Authors: Lubis Doli Maulana Gama Samudra
Published: December 2021

Penelitian ini bertujuan untuk mengetahui hubungan antara komitmen organisasi dengan perilaku kewargaan organisasional (OCB) pada karyawan. Populasi dalam tinjauan ini lebih dari 260 orang diambil dari perwakilan yang masih bekerja efektif. Penelitian ini menggunakan metode kuantitatif dan pemeriksaan dalam tinjauan ini dengan strategi pemeriksaan purposive berjumlah 100 orang. Instrumen yang digunakan adalah jajak pendapat komitmen organisasional dengan Organizational Citizenship Behavior (OCB). Penelitian dibedah menggunakan tes Analisis Regresi. Hasil penelitian menunjukkan bahwa terdapat hubungan positif Rx-y = 0,589 komitmen organisasi dengan perilaku kewargaan organisasi. Hal ini ditunjukkan dengan thitung = 4,194 > ttabel = 1,985 dengan nilai kepentingan 0,000 < 0,05.
Autoxidation of terpenes, a common pathway in tropospheric and low temperature combustion conditions: the case of limonene and α-pinene
Authors: Benoit Roland , Belhadj Nesrine , Lailliau Maxence , Dagaut Philippe
Published: December 2021

Abstract. The oxidation of monoterpenes under atmospheric conditions has been the subject of numerous studies. They were motivated by the formation of oxidized organic molecules (OOM) which, due to their low vapor pressure, contribute to the formation of secondary organic aerosols (SOA). Among the different reaction mechanisms proposed for the formation of these oxidized chemical compounds, it appears that the autoxidation mechanism, involving successive events of H-migration and O2 addition, common to both low-temperature combustion and atmospheric conditions, is leading to the formation of highly oxidized molecules (HOM). In atmospheric chemistry, the importance of autoxidation compared to other oxidation pathways has been the topic of numerous studies. Conversely, in combustion, autoxidation under cool flame conditions is the main oxidation process commonly taken into account. An analysis of oxidation products detected in both conditions was performed, using the present combustion data and literature data from tropospheric oxidation studies, to investigate possible similarities in terms of observed chemical formulae of products. To carry out this study, we chose two terpenes, α-pinene and limonene (C10H16), among the most abundant biogenic components in the atmosphere, and considered in many previous studies. Also, these two isomers were selected for the diversity of their reaction sites (exo- and endo- carbon-carbon double bonds). We built an experimental database consisting of literature atmospheric oxidation data and presently obtained combustion data for the oxidation of the two selected terpenes. In order to probe the effects of the type of ionization used in mass spectrometry analyses on the detection of oxidation products, we used heated electrospray ionization (HESI) and atmospheric pressure chemical ionization (APCI), in positive and negative modes. The oxidation of limonene-oxygen-nitrogen and α-pinene-oxygen-nitrogen mixtures was performed using a jet-stirred reactor at elevated temperature (590 K), a residence time of 2 s, and atmospheric pressure. Samples of the reacting mixtures were collected in acetonitrile and analyzed by high-resolution mass spectrometry (Orbitrap Q-Exactive) after direct injection and soft ionization, i.e. (+/−) HESI and (+/−) APCI. This work shows a surprisingly similar set of chemical formulae of products, including oligomers, formed in cool flames and under simulated atmospheric conditions. Data analysis showed that a non-negligible subset of chemical formulae is common to all experiments independently of experimental parameters. Finally, this study indicates that more than 40 % of the detected chemical formulae in this full dataset can be ascribed to an autoxidation mechanism.
Enhanced flood hazard assessment beyond decadal climate cycles based on centennial historical data (Duero basin, Spain)
Authors: Benito Gerardo , Castillo Olegario , Ballesteros-Cánovas Juan A. , Machado Maria , Barriendos Mariano
Published: December 2021

Abstract. Current climate modelling frameworks present significant
uncertainties when it comes to quantifying flood quantiles in the context of
climate change, calling for new information and strategies in hazard
assessments. Here, state-of-the-art methods on hydraulic and statistical
modelling are applied to historical and contemporaneous flood records to
evaluate flood hazards beyond natural climate cycles. A comprehensive flood
record of the Duero River in Zamora (Spain) was compiled from documentary
sources, early water-level readings and continuous gauge records spanning
the last 500 years. Documentary evidence of flood events includes minute
books (municipal and ecclesiastic), narrative descriptions, epigraphic
marks, newspapers and technical reports. We identified 69 flood events over
the period 1250 to 1871, of which 15 were classified as catastrophic
floods, 16 as extraordinary floods and 38 as ordinary floods. Subsequently,
a two-dimensional hydraulic model was implemented to relate flood stages (flood marks and
inundated areas) to discharges. The historical flood records show the
largest floods over the last 500 years occurred in 1860 (3450 m3 s−1),
1597 (3200 m3 s−1) and 1739 (2700 m3 s−1). Moreover, at least 24
floods exceeded the perception threshold of 1900 m3 s−1 during the period
(1500–1871). Annual maximum flood records were completed with gauged
water-level readings (pre-instrumental dataset, PRE: 1872–1919) and systematic gauge records (systematic
dataset, SYS:
1920–2018). The flood frequency analyses were based on (1) the expected moments
algorithm (EMA) and (2) the maximum likelihood estimator (MLE) method, using
five datasets with different temporal frameworks (historic dataset, HISTO: 1511–2018; PRE–SYS:
1872–2018; full systematic record, ALLSYS: 1920–2018; SYS1: 1920–1969; and SYS2: 1970–2018). The
most consistent results were obtained using the HISTO dataset, even for high
quantiles (0.001 % annual exceedance probability, AEP). PRE–SYS was robust
for the 1 % AEP flood with increasing uncertainty in the 0.2 % AEP or
500-year flood, and ALLSYS results were uncertain in the 1 % and 0.2 %
AEP floods. Since the 1970s, the frequency of extraordinary floods
(>1900 m3 s−1) declined, although floods on the range of the
historical perception threshold occurred in 2001 (2075 m3 s−1) and 2013
(1654 m3 s−1). Even if the future remains uncertain, this bottom-up
approach addresses flood hazards under climate variability, providing real
and certain flood discharges. Our results can provide a guide on low-regret
adaptation decisions and improve public perception of extreme flooding.
SUPERSUBSTORM ON 28 MAY 2011 – GEOMAGNETIC EFFECTS IN THE GLOBAL SCALE
Authors:   Polar Geophysical Institute, Apatity, Russia, Despirak I.V. , Kleimenova N.G. , Lubchich A.A. , Setsko P.V. , Werner R.
Published: December 2021

For this analysis, we selected the supersubstorm (SSS) occurred during the strong magnetic storm on 28 May 2011 (SYM/H~100 nT). The ground-based magnetic effects of SSS have been studied basing on the data from the global SuperMAG, INTERMAGNET and IMAGE magnetometer networks, as well as on the magnetic measurements by the ionospheric satellite AMPERE system. According to the SML- index behavior, the SSS event maximum was identified at ~09:00 UT on 28 May 2011 (SML= ~-2600 nT). The SSS occurred during the passage of the magnetic cloud in the solar wind. Before the SSS, the BZ component of the Interplanetary Magnetic Field (IMF) was negative, the IMF BY component was positive, and the local jump in the solar wind dynamic pressure was registered. We found that the SSS developed in the magnetosphere in the global scale. A strong westward electrojet was observed at auroral latitudes from the evening side to the dayside. In contrast to the typical scenario of a classical substorm, a very intense eastward electrojet was detected in the afternoon-evening sector. That may be a result of the formation of an additional partial ring current during the supersubstorm.
GICS IN THE MAIN TRANSMISSION LINE “NORTHERN TRANSIT” IN RUSSIA AND IN THE MÄNTSÄLÄ FINLAND PIPELINE: A CASE STUDY
Authors:   Polar Geophysical Institute, Apatity, Russia, Despirak I.V. , Setsko P.V. ,   Polar Geophysical Institute, Apatity, Russia, Sakharov Ya.A. ,   Polar Geophysical Institute, Apatity, Russia, Selivanov V.N. ,   Northern Energetic Research Center, Kola Scientific Centre RAS, Apatity, Russia
Published: December 2021

Geomagnetically induced currents (GICs), arising both on power lines and on pipelines, may have strong negative impact on the technological networks up to accidents ("blackouts"). Magnetospheric disturbances are one of the factors in the appearance of GICs, however there is no unambiguous relationship between substorm and presence of currents. In this paper, we consider two intense cases of GIC (15March 2012 and 17 March 2013), registered on two different technological networks: 1) on the "Nothern Transit" power line (Vykhodnoy, Revda and Kondopoga stations) located in the auroral zone, 2) on the Finnish natural gas pipeline near Mäntsälä located in the subauroral zone. Both GIC cases are compared with substorm development in the auroral zone, using data from IMAGE magnetometers network and MAIN camera system in Apatity. We found a good correlation between the GIC appearance and variations of geomagnetic indexes: IL – index, which characterized of westward electrojet intensity on the IMAGE meridian and Wp - index, which describes the wave activity of the substorm. Besides, it was shown also a good correlation between GICs and the thin spatio-temporal structure of the substorm development (the appearance and the propagation to the pole of substorm activations), which is appeared both in the magnetic data and in the all sky camera images.
СУПЕРСУББУРЯ 20 ДЕКАБРЯ 2015 ГОДА: МАГНИТНЫЕ ЭФФЕКТЫ НА РАЗНЫХ ШИРОТАХ
Authors:   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия, Любчич А.А. , Дэспирак И.В. ,   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия, Клейменова Н.Г. ,   Институт Физики Земли (ИФЗ РАН), г. Москва, Россия, Вернер Р. ,   Институт Космических Исследований и Технологий (ИКИТ), БАН, г. Стара Загора, Болгария
Published: December 2021

Анализируется суперсуббуря (очень интенсивная суббуря с SML индексом ~2100 нТл), наблюдавшаяся 20 декабря 2015 года (с началом в 16:13 UT) во время интенсивной магнитной бури, вызванной воздействием на магнитосферу магнитного облака с устойчивым южным направлением ММП. Показано, что ионосферные токи, соответствующие этой суперсуббуре, развивались в глобальном масштабе – от поздне-утреннего до вечернего секторов. Во время ее развития наблюдался очень интенсивный западный электроджет с максимумом в утреннем секторе (~06 MLT). В вечернем секторе (~18 MLT) наблюдался восточный электроджет. Во время взрывной фазы суббури в вечернем секторе наблюдались вариации магнитного поля, соответствующие появлению дополнительного токового клина обратного направления. Развитие суббури сопровождалось появлением большой положительной вариации Х-компоненты магнитного поля на геомагнитных широтах от ~60° до ~50°, что могло привести к наблюдаемому импульсу MPB-индекса (Midlatitude Positive Bay index).
СЕЗОННЫЕ ИЗМЕНЕНИЯ ГЕОМАГНИТНЫХ ИНДИКАТОРОВ МАГНИТОСФЕРНОГО КОЛЬЦЕВОГО ТОКА
Authors:   ФГБУН Федеральный исследовательский центр «Якутский научный центр Сибирского отделения Российской академии наук», Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН, г. Якутск, Россия, Макаров Г.А.
Published: December 2021

Исследуются вариации среднесуточных значений геомагнитных индексов Dst, SYM-H и АSY-H. Установлено, что SYM-H и ASY-H линейно растут по модулю с ростом модуля Dst и в течение года имеют возрастания в периоды равноденствий. Модуль отношения (SYM-H)/(ASY-H) растет с ростом модуля Dst и приближается к 1, что означает сравнимость симметричного и асимметричного компонент кольцевого тока.
ТРЕХМЕРНОЕ МОДЕЛИРОВАНИЕ ПРОЦЕССА РАСПРОСТРАНЕНИЯ ЭЛЕКТРОМАГНИТНЫХ ВОЛН КНЧ-ДИАПАЗОНА ОТ КОНТРОЛИРУЕМОГО ИСТОЧНИКА В ВЫСОКОШИРОТНЫХ РАЙОНАХ ЗАПАДНО-АРКТИЧЕСКОЙ КОНТИНЕНТАЛЬНОЙ ОКРАИНЫ НА ПРИМЕРЕ ПОЛУОСТРОВОВ РЫБАЧИЙ И СРЕДНИЙ
Authors:   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия, Любчич В.А.
Published: December 2021

В статье рассмотрены результаты трехмерного моделирования процесса распространения в земной коре электромагнитных волн крайне низкочастотного (КНЧ) диапазона, излученных контролируемым источником, в районе полуостровов Рыбачий и Средний. Модельные значения компонент электромагнитного поля соответствуют экспериментально измеренным значениям, полученным в рамках проекта FENICS-2019 по электромагнитному зондированию (ЭМЗ) земной коры Балтийского щита с использованием промышленных линий электропередач (ЛЭП). По результатам моделирования было показано, что существенное влияние на распространение электромагнитных волн КНЧ-диапазона в данном районе оказывает наличие зон тектонических разломов с повышенной электропроводностью, разделяющих Балтийский щит и Западно-Арктическую платформу, и присутствие морской воды, окружающей полуострова Средний и Рыбачий с трех сторон. Такая конфигурация электропроводящих объектов приводит к образованию макромасштабных замкнутых электрических контуров, в которых генерируются вторичные электромагнитные поля, направленные противоположно первичному полю от контролируемого источника.
ОСОБЕННОСТИ ВЕРТИКАЛЬНОГО РАСПРЕДЕЛЕНИЯ ТЕМПЕРАТУРЫ ВОЗДУХА В ПОГРАНИЧНОМ СЛОЕ АТМОСФЕРЫ В ПРИБРЕЖНЫХ И ЦЕНТРАЛЬНЫХ РАЙОНАХ МУРМАНСКОЙ ОБЛАСТИ
Authors:   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия, Демин В.И. , Козелов Б.В. ,   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия, Лосев А.В. ,   ФГБНУ «Полярный геофизический институт», г. Апатиты, Россия
Published: December 2021

Рассмотрены сезонные и пространственные вариации поля температуры воздуха в пограничном слое атмосферы на территории Мурманской области. Временные вариации над Мурманском, Апатитами и Кандалакшей происходят в значительной степени синхронно на всех высотах. Пространственные различия в термической структуре ПСА в среднем достигают 1°С зимой и 2°С летом. Неоднородности вызваны большими расстояниями между пунктами измерений и с неодинаковым воздействием Баренцева и Белого моря на тепловой режим прибрежных территорий.
COVID-19: ОСОБЕННОСТИ ПАНДЕМИИ В УСЛОВИЯХ ГЛОБАЛЬНОГО МИНИМУМА СОЛНЕЧНОЙ АКТИВНОСТИ
Authors:   ИЗМИРАН, Москва, Россия, Рагульская М.В.
Published: December 2021

В 2019-2020 годах наблюдался одновременный глубокий минимум квази-столетнего и минимум 11-летнего цикла солнечной активности. Это сказалось на эпидемиологической обстановке в мире и особенностях течении пандемии COVID-19. Существуют дополнительные факторы внешней среды и особенностей генетики населения в каждом конкретном регионе, которые могут ускорить развитие локальной эпидемии, а также увеличить тяжесть ее протекания и уровень летальности. В докладе рассматриваются три основных фактора, модулирующих развитие пандемии: динамика солнечной активности и галактических космических лучей, геногеографическое распределение населения (в частности, характерные для данной местности гаплогруппы), и температурный режим окружающей среды. Текущая пандемия СОVID -19 наиболее тяжело протекает в странах с доминантной гаплогруппой R1b. На европейской территории России доминантной гаплогруппой является R1a, для которой оказалось характерно быстрое развитие эпидемии при низкой летальности и большом количестве бессимптомных больных. В северных областях России удельный вес R1a сокращается почти вдвое, уступая место гаплогруппе Nc1. Различия в генетическом составе населения может объяснить существенную разницу развития первой волны эпидемии COVID-19 в Москве и Санкт-Петербурге, а также особенности вакцинации и приобретения коллективного иммунитета в различных странах и регионах (необходимо вакцинировать около 80% для гаплогруппы R1b против 40% для галогруппы N). В ближайшие 30 лет предполагается сохранение крайне низкой солнечной активности. В этих условиях можно ожидать двукратное увеличение числа пандемий (каждые 5-6 лет вместо 10-11 лет) с выраженными геногеографическими отличиями в развитии локальных эпидемий.
Fransız Milletlerarası Tahkim Kanunu’nun İncelenmesi
Authors: UĞUR Aynaz
Published: December 2021

Abstract International arbitration notion contains to be commercial and to be international together, different from national arbitration notion. To be international criterion is to the fullest extent arranged in old French CPC art. 1492, which contains also French Arbitration Code. According to this article which is protected by 13 January 2011 reform; arbitration which is about international commercial benefit is an international arbitration. In 1992 French Arbitration Commitee prepared a report with the name of “Perspectives for İmprovement of French Arbitration Law”. The amendements of the directive of 13 January 2011 is neither a revolution nor an easy make up but it is a real reform which can be known as by the words clarity, definiteness, flexibility, freedom of choice, effectuality and speediness. The reform of 2011 did not changed the liberal structure of the French international arbitration law which is stand by freedom of contract and limited only by public policy. Keywords: France, International Arbitration, Freedom of Choice, Public Policy, Liberal
New data on ore mineralogy and mineral chemistry of pyrite from the Pishtene ore occurrence, Western Srednogorie, Bulgaria
Authors: Sabeva Ralica
Published: December 2021

The Pishtene ore occurrence is situated north-northeast from the Pishtene paleovolcanic center in the western part of the Srednogorie zone. The occurrence is hosted by altered basaltic trachyandesites. The styles of alteration are advance argillic, argillic, sericitic and propylitic. Ore mineralization is in quartz-sericite zone and is represented by quartz-pyrite and quartz-polymetallic. The ore minerals are pyrite, chalcopyrite and sphalerite. Pyrite from quartz-polymetallic stage is with high concentrations of Cu, Se and Co. Au with low contents is also detected.
Use of two contemporary remote sensing technologies for mapping the Thracian Cliffs landslide (Northern Bulgarian Black Sea Coast)
Authors: Atanasova Mila , Nikolov Hristo
Published: December 2021

In this paper are presented the results from the investigations of the active landslide, located in front of the Thracian Cliffs golf club (Northern Bulgarian Black Sea Coast) for the period 2019–2021. Extensive research by means of in-situ and remote sensing has been carried out on the latest landslide activations. As part of the study, a control GNSS geodynamic network was established. This network was used as benchmark for the results obtained from satellite SAR data processing and UAV surveys targeted at monitoring the modern landslide developments.
Correlation of neutrophil-to-lymphocyte ratio and clinical outcome of acute thrombotic stroke in patients with COVID-19
Authors: Sarengat Rizky , Islam Mohammad S. , Ardhi Mohammad S.
Published: December 2021

The coronavirus disease 2019 (COVID-19) pandemic has caused millions of deaths worldwide. Acute ischemic stroke is a life-threatening risk factor for COVID-19 infection. Neutrophil-to-lymphocyte ratio (NLR) is one of the predictors of poor prognosis in acute ischemic stroke. The aim of this study was to assess the correlation between NLR values and the clinical outcome of acute thrombotic stroke patients with COVID-19 that was measured using the National Institutes of Health Stroke Scale (NIHSS). A cross-sectional hospital-based study was conducted in Dr. Soetomo General Hospital Surabaya, Indonesia. Patients with acute thrombotic stroke and COVID-19 admitted between 1 March 2020 and 31 May 2021 were recruited. The NLR values and the NIHSS scores were assessed during the admission and the correlation between NLR and NIHSS scores was calculated. This study included 21 patients with acute thrombotic stroke and COVID-19, consisting of 12 males and 9 females. The mean age was 57.6 years old. The mean NLR values was 8.33±6.7 and the NIHSS scores ranging from 1 to 33. Our data suggested a positive correlation between NLR values and NIHSS scores, r=0.45 with p=0.041. In conclusion, the NLR value is potentially to be used as a predictor of the clinical outcome in acute thrombotic stroke patients with COVID-19. However, further study is warranted to validate this finding.
Vấn đề học phí trình độ cao đẳng nghề ở nước ta hiện nay
Authors: Phan Anh Tuân
Published: December 2021

Giá thành và năng lực chi trả là hai thuộc tính cơ bản cấu thành tiêu chuẩn học phí của một trình độ đào tạo. Tuy vậy, giá thành học phí trình độ Cao đẳng nghề ở Việt Nam những năm gần đây thấp và tăng trưởng chậm nhưng vượt quá khả năng chi trả của người học, đặc biệt là đối với những sinh viên có hoàn cảnh kinh tế  khó khăn. Trên cơ sở phân tích thống kê thực trạng vấn đề học phí trình độ Cao đẳng nghề 2010 - 2015, bài báo phát hiện tính mâu thuẫn nội tại cũng như các hạn chế trong vấn đề học phí trình độ Cao đẳng nghề ở nước ta hiện nay là do tác động trực tiếp từ sự gia tăng quá mức của chỉ số CPI, tăng trưởng GDP bình quân đầu người chậm và sự hỗ trợ tài chính học tập của Chính phủ có hạn. Trên cơ sở đó, bài báo đề xuất một số kiến nghị và giải pháp phù hợp. Hi vọng những kiến nghị và giải pháp này có ích về mặt thực tiễn đối với hoàn thiện vấn đề học phí trình độ Cao đẳng nghề ở nước ta hiện nay.
Nghiên cứu ứng dụng phương pháp thẻ điểm cân bằng (Balanced scorecard) trong đánh giá thành quả hoạt động tại Ngân hàng Thương mại cổ phần Công Thương chi nhánh Huế
Authors: Phan Thị Hải Hà , Nguyễn Quang Huy
Published: December 2021

Nghiên cứu này đề xuất việc ứng dụng thẻ điểm cân bằng vào đo lường thành quả hoạt động Ngân hàng VietinBank chi nhánh Huế. Việc đánh giá này được thực hiện trên bốn khía cạnh: tài chính, khách hàng, quy trình nội bộ, đào tạo và phát triển nhân viên. Để áp dụng được mô hình này, nghiên cứu đề xuất các mục tiêu, xây dựng các thước đo và đưa ra được các hành động thực hiện cụ thể đối với từng khía cạnh. Đồng thời, các mục tiêu của bốn khía cạnh cần phải được gắn kết chặt chẽ với nhau vì kết quả của mục tiêu này sẽ ảnh hưởng lớn đến các mục tiêu còn lại.
Sự hội tụ của dãy lặp hỗn hợp cho bài toán cân bằng và ánh xạ thỏa mãn điều kiện (ø-Eµ) trong không gian banach trơn đều và lồi đều
Authors: Trương Cẩm Tiên , Nguyễn Trung Hiếu
Published: December 2021

Trong bài báo này, chúng tôi giới thiệu khái niệm ánh xạ thỏa mãn điều kiện (ø-Eµ) trong không gian Banach trơn, đề xuất một dãy lặp hỗn hợp để tìm nghiệm chung của bài toán cân bằng và điểm bất động của ánh xạ thỏa mãn điều kiện (ø-Eµ) đồng thời thiết lập sự hội tụ của dãy lặp này trong không gian Banach trơn đều và lồi đều. Các kết quả này là sự mở rộng các kết quả chính trong [2] từ không gian Hilbert sang không gian Banach trơn đều và lồi đều. Đồng thời, chúng tôi cũng đưa ra ví dụ minh họa cho kết quả đạt được.
Nghiên cứu khả năng trích ly và bảo quản chất màu tự nhiên từ vỏ quả thanh long ruột đỏ
Authors: Vũ Thị Thanh Đào
Published: December 2021

Nghiên cứu khả năng trích ly chất màu betacyanin từ vỏ thanh long ruột đỏ và thanh long ruột trắng. Kết quả cho thấy, vỏ thanh long ruột đỏ cho khả năng trích ly chất màu betacyanin tốt hơn. Từ đó sử dụng phương pháp bề mặt đáp ứng để tối ưu hóa quá trình trích ly chất màu betacyanin từ vỏ quả thanh long. Giá trị tối ưu cho các thông số trích ly như tỷ lệ dung môi/nguyên liệu, nhiệt độ và thời gian lần lượt là 14,06 v/w; 56,51oC và 29,48 phút. Đồng thời, dịch màu giữ được chất lượng tốt hơn khi đưa về pH thấp, bao gói bằng bao bì thủy tinh tối màu và bảo quản lạnh. Bên cạnh đó, dịch màu betacyanin bổ sung vào sữa chua làm tăng hàm lượng vitamin C và betacyanin của sản phẩm, đồng thời đạt điểm cảm quan cao.
Ứng dụng nội suy B-spine trong thiết lập quỹ đạo chuyển động của đối tượng động
Authors: Hoàng Thái Hổ , Kosnikov Yu. N.
Published: December 2021

Bài báo trình bày một phương pháp mới và phần mềm thiết lập quỹ đạo chuyển động của các đối tượng động trong không gian bằng cách áp dụng phương pháp nội suy B-spline trên tập hợp các điểm quy chiếu cho trước. Sau đó, để đảm bảo đường cong B-spline đi qua các điểm đó, tập hợp các điểm quy chiếu cho trước được thay thế bằng một tập hợp các điểm quy chiếu mới. Cuối cùng kết hợp với thuật toán sai phân hữu hạn trong tính toán, tốc độ biểu thị hình học của quỹ đạo sẽ tăng lên và giảm thiểu tài nguyên trong bộ lưu trữ máy tính.
Khảo sát tính UGN của đại số đường đi Leavitt trên các đồ thị lũy thừa
Authors: Nguyễn Hữu Tính , Ngô Tấn Phúc
Published: December 2021

Trong bài viết này, chúng tôi khảo sát đồ thị lũy thừa của nhóm cộng các số nguyên modulo. Tiếp theo, dựa vào các kết quả gần đây của đại số đường đi Leavitt mà chủ yếu là dựa vào công trình [1], chúng tôi xét tính UGN của đại số đường đi Leavitt đối với lớp đồ thị nói trên.
CHROMOSOMAL POLYMORPHISM IN BULGARIAN PATIENTS WITH REPRODUCTIVE PROBLEMS – ONE GENETIC CENTRE EXPERIENCE
Authors:   Department of Medical Genetics, Medical University, Varna, Bulgaria., Angelova Lyudmila , Tsvetkova Maria ,   Department of Medical Genetics, Medical University, Varna, Bulgaria., Levkova Mariya ,   Department of Medical Genetics, Medical University, Varna, Bulgaria.
Published: December 2021

Chromosomal polymorphism is described as normal variants at chromosomal regions with no impact on the phenotype but a possible correlation to infertility and recurrent spontaneous abortions. The aim of this study was to evaluate the effect of the chromosomal polymorphisms involved in families with reproductive failures in the Bulgarian population. Material and methods: A total of 1733 patients with unexplained reproductive failures who visited the Laboratory of Medical Genetics – Varna, Bulgaria, (2004 - 2019) were investigated by conventional cytogenetic analysis GTG and CBG differential banding techniques and analyzed at the resolution 400-550 GTG bands. Results: Chromosomal polymorphisms were found in 173 infertile patients (9,98%). The sex distribution was 6,52% males and 3,46% females. The most frequent finding was inv(9)(qh) (23,7%). The other chromosomal variants, which were found, consisted: 9qh+/- variants (15,1%); polymorphisms on the short arms of the acrocentric chromosomes (21,4%); 16qh+ (12,7%) and 1qh+ (6,9%). Y chromosome polymorphism was found in 27,4% of the males with polymorphisms. Two rare cases of polymorphism involving the centromere regions - 19qcenh+ and 20pcenh+ were also found. Conclusion: There is growing evidence that polymorphisms may have a clinical impact on fertility and could take part in the etiology of RF. In this study, we found a significantly high percentage of polymorphisms (9,98%) among the tested patients, and they were more common among males. The statistical significance of increased incidence of chromosome variations found in our study emphasizes the need for routine evaluation of their role in families with RF in our country.
Allelic variants at the foraging locus respond differentially to changes in larval density or food composition
Authors:   Universität Regensburg, Benmaamar Simon , Brembs Björn
Published: December 2021

Environmental variability during the development of an organism has known impacts on the expression of certain behavioural patterns. We used the fruit fly Drosophila melanogaster to investigate how different environmental conditions interact with the allelic variants of rover (forR) and sitter (fors) at the foraging locus to affect food-related behaviour of larvae. We discovered that larval density and nutrient availability were key environmental factors affecting the larval behaviour during early development. High larval density decreased the tendency of rovers to leave a food patch and reduced their travelled path lengths, such that rovers and sitters showed no more significant differences regarding their behaviour. Similar results were obtained when starving the larvae. Furthermore, cutting the availability only of specific nutrients such as sugar, fat or protein during development all affected larval foraging behaviour and locomotion.
Oncological outcomes of metastatic castration resistant prostate cancer (mCRPC) treated with different therapies sequences after completion of docetaxel: a retrospective study in Songklanagarind Hospital
Authors:   Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkhla University, Hatyai, Songkhla, Thailand, Chaokhamin Isaris , Attawettayanon Worapat ,   Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkhla University, Hatyai, Songkhla, Thailand, Chalieopanyarwong Virote ,   Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkhla University, Hatyai, Songkhla, Thailand, Tanthanuch Monthira ,   Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkhla University, Hatyai, Songkhla, Thailand, Bejrananda Tanan ,   Division of Urology, Department of Surgery, Faculty of Medicine, Prince of Songkhla University, Hatyai, Songkhla, Thailand
Published: December 2021

Objective: Many treatment options of metastatic castration-resistant prostate cancer (mCRPC) after docetaxel chemotherapy have proved efficacious in clinical trials but, to date, knowledge regarding oncological outcomes is limited. Materials and Methods: We assessed the oncological outcome of 4 drugs (abi- raterone acetate, cabazetaxel, enzalutamide and ketoconazole) in a normal clinical setting in a university-based hospital. Our cohort consisted of 69 patients with post-docetaxel mCRPC. The primary endpoint was overall survival (OS). The secondary endpoint was predicted factor associated overall survival with all sec- ond-line mCRPC treatment outcomes according to the Cox proportional hazards regression model. Results: This cohort consisted of 69 patients with progressive mCRPC after docetaxel chemotherapy. Median overall survival following treatment with abiraterone acetate and ketoconazole was 25.92 and 9.59 months respectively (p < 0.05). Overall survival rates at 1-year following abiraterone acetate, cabazetaxel, enzalutamide and ketoconazole therapy were 76.3%, 83.3%, 100% and 41.9%, respectively. Multivariable analysis found that abiraterone acetate, cabazitaxel and enzalutamide significantly improved survival in comparison to ketoconazole (p < 0.001). Conclusion: Analysis of overall survival following second-line treatment of mCRPC post docetaxel in our study statistically significantly confirmed that abiraterone acetate, cabazitaxel and enzalutamide improve overall survival in comparison to ketoconazole. The study also found that enzalutamide treatment resulted in better outcomes in comparison to the other drugs.
A comparison of stone free rate between a diuretic and a control group of patients undergoing extracorporeal shock wave lithotripsy: a prospective, randomized, double-blind, placebo-controlled trial
Authors:   Division of Urology, Department of Surgery, Chaophraya Yommarat Hospital, Suphanburi, Thailand, Cheewaisrakul Peerapat
Published: December 2021

Objectives: To compare the stone free rate and treatment success rate between a diuretic group of patients undergoing extracorporeal shock wave lithotripsy (ESWL) and a control placebo group (normal saline solution). Materials and Methods: One hundred and ninety-four patients with solitary renal calculi or ureteric calculi size of 5 mm or over were prospectively randomized into 2 groups. Ninety-seven patients in the first group (diuretic group) underwent ESWL after intravenous injection of furosemide 40 mg, and 97 patients in the second (control) group received normal saline solution 4 ml instead of furosemide prior to ESWL. The treatment protocol included 3,000 shockwaves per patient in each session with the energy beginning at 8 and progressing up to 15 kilovolts. A maximum of 3 ESWL sessions were permitted per patient. The primary outcome was stone free rate, and the secondary outcome was treatment success rate at 3 months after the first ESWL treatment. Results: The stone free rate was 48.5% compared to 50.5% for diuretic group and control group respectively and the treatment success rate was 81.4% compared to 64.9%. The difference in stone free rate was not statistically significantly different (p = 0.87), however the treatment success was, p = 0.01. Conclusion: A combination of diuretic therapy followed by ESWL improves the treatment success rate compared with standard ESWL therapy alone.
One-shot dilation versus metallic dilation technique for access in percutaneous nephrolithotomy: comparison of efficacy, access time and fluoroscopic time
Authors:   Division of Urology, Department of Surgery, Nakornping Hospital, Chiang Mai, Thailand, Phaijitwichian Somboon
Published: December 2021

Objective: The aim of this study was to compare the efficacy, access tract dilation time and fluoroscopic time between the one-shot dilation technique and telescopic metal dilatation technique in patients undergoing percutaneous nephrolithotomy in Nakornping Hospital. Materials and Methods: Sixty-six patients who underwent percutaneous nephrolithotomy from January 2020 to July 2021 were included in the study and they were randomly divided into two groups. In group 1 (32 patients), telescopic metal dilation was used, in group 2 (33 patients), the one-shot technique was used. Success rates of dilation, access tract dilation time and fluoroscopic time were evaluated. Results: The success rate of dilation was 100% in both groups. The access tract dilation time was 835.63 ± 309.68 seconds in group 1 and 569.42 ± 314.75 seconds in group 2 (p = 0.001). The fluoroscopic time was 48.16 ± 22.16 seconds in group 1 and 41.97 ± 23.99 seconds in group 2 (p = 0.29). The access tract dilation time of the one-shot dilation technique was statistically significantly shorter than that in the telescopic metal dilatation group. The mean fluoroscopic time of the one- shot dilation technique was shorter than in telescopic metal dilatation but was not statistically significant. Conclusion: One-shot dilation technique is as effective as telescopic metal dilatation, with a significant reduction in access tract dilation time.
Endometriosis intestinal, una causa de suboclusión intestinal poco sospechada. Serie de casos
Authors: Pérez Tomas , Alsina Farreta Romina Lorena , González María Laura , Pasqua Analía Verónica , Sobrero María Josefina , Santino Juan Pablo , Marcolongo Mariano Martín
Published: December 2021

Endometriosis is defined as the presence of endometrial glands in extrauterine sites. Intestinal deep infiltrating endometriosis is considered when the endometriotic lesion is located more than 5 mm below the peritoneum. Intestinal obstruction due to endometriosis is rare, occurring in approximately 1% of cases. We present three cases with intestinal occlusion as deep infiltrating endometriosis debut. Its symptomatic presentation can mimic multiple gastroenterological entities, mainly irritable bowel syndrome or inflammatory bowel disease so its diagnosis can be difficult. However, suspecting this pathology and diagnosing it is important to define therapeutic behavior and improve the quality of life of our patients.
Evaluation of insulin resistance and its associated risk factors: Identification of adolescents at higher risk for diabetes
Authors: Ugomma Ude Agwu  , Michael Erem Kalu  , Vivian Abomah Okeoghene  , Marvis Njoku  , Victor Udo Usanga  , Simon Onyema Azi  , Anthony Nwakpa
Published: December 2021

Insulin resistance is a major risk factor for developing type 2 diabetes mellitus and metabolic diseases. It is a decrease response to the effect of the hormone, mainly by the liver, skeletal muscles and adipose tissues. Despite its widely reported prevalence among the elderly, information on its prevalence among adolescents is relatively limited. The study was aimed at assessing the prevalence of insulin resistance and its contributing risk factors among the students of a tertiary institutions in Ebonyi State, Nigeria. A total of 260 students who consented to the study were recruited, fasting blood glucose (FBG) and fasting blood insulin (FBI) levels were determined, anthropometric data were collected using meter rule, flexible tape and digital scale for calculation of body mass index (BMI) and waist/hip ratio (WHR). A structured questionnaire was used to collect demographic data and information on lifestyle. Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were also measured. The findings showed a 5.4% prevalence of insulin resistance with more in males than in females. Sociodemographic and anthropometric characteristics were found to positively correlate with HOMA-IR. A strong association (p < 0.05) was observed between HOMA-IR and lifestyle. The differences in the levels of HOMA-IR within and between the various groups of participants were not statistically significant (p > 0.05) except in gender. The findings of this study may have potential implications with regards to strategies for amelioration and prevention of insulin resistance amongst adolescents.
Determining the Efficiency and Yield of Caffeine Extraction for Robusta and Arabica Coffee Beans
Authors: Yu Zeyu , Reddy Akshay Jakkidi , Wagh Himanshu
Published: December 2021

The objective of this review is to determine the difference in caffeine content in the coffee beans from different brands that are available in Costco. Two different popular coffee bean brands were bought and tested to determine which brand would have the highest caffeine content and their relative popularity among consumers. The extraction DMC method was conducted by using chemicals such as calcium carbonate, water, and DMC. The same amount of coffee beans were boiled with water until highly concentrated solutions were formed. Extraction funnel was utilized to wash out caffeine. Then, the recrystallization and vacuum filtration was utilized to obtain caffeine in solid form. The identity of the product along with the purity of the product was determined using melting temp, IR-spectroscopy, UV-vis spectrum, and TLC plating. The mass of caffeine produced from individual coffee brands were measured and compared. It was hypothesized that robusta coffee beans would yield more caffeine than arabica coffee beans. The expected results verify those claims as the data demonstrates that the amount of caffeine extracted from 10 grams of robusta coffee would be around .8021 grams, while the amount of caffeine extracted from 10 grams of arabica coffee would be around .4321 grams. The IR graph, UV-vis graph, and TLC plate were conducted to verify the identity of the product. The predicted IR graph, UV-vis graph, and TLC plate closely matched with the literature values, which indicates that the product produced is pure caffeine. One source of error that could skew the data could be the presence of impurities from the coffee beans that react in solution while we are trying to extract the caffeine. The broader impact of this review is that by understanding the caffeine content in different products, the medical and scientific field can further determine the difference in health effects between excess and optimal caffeine consumption to the human body. Additionally, scientists can research various medical usages of caffeine to help different patients with sleep disorders.
Factors Affecting the Material Choice for Restoration in Posterior Teeth
Authors: Shah Sana , Absar Khan Muhammad , Ali Aamir , Talpur Nida , Lohana Sidhart , Kumar Raj
Published: December 2021

Aim: To determine the factors affecting the selection of material of choice in posterior teeth. Methods: Descriptive cross-sectional study done June-December 2015 at Liaquat University of Medical and Health Sciences, Jamshoro. Individuals who refused to participate in the study were eliminated from the sample. Each dentist signed an informed consent form. Personal data were entered on a proforma/consent form. The data collection tool was a Proforma/Questionnaire with all required questions. Dentists were personally briefed on the study's objectives and the importance of their participation. Informed permission forms were gathered one week later. Not returning the questionnaires after two professional visits was deemed participant loss. The analysis employed descriptive statistics and SPSS version 17.0. Results: 200 people responded to the survey. 70% advised amalgam for posterior tooth repair, 28% recommended composite, and 2% recommended Glass Ionomer. In this study, 65% selected amalgam, 34% preferred composite, and 1% preferred glass ionomer. In this series, 60% of people selected amalgam, followed by composite (37%), and glass ionomer (3%). In this series, 60% chose amalgam, while 40% chose composite. No glass ionomer In this study, 55% of participants advocated composite, 40% recommended amalgam, and 5% recommended GIC. Patients' preferences impacted material selection for posterior restorations in this study: 55% chose amalgam, 35% composite, and 10% glass ionomer. Most participants (60%) picked composite for moisture management, followed by amalgam (35%), and GIC (5%). Conclusion: Most posterior teeth restorations involve amalgam fillings. Determinants include strength, durability, color match and dental structure preservation. Amalgam was connected to strength, while composite saved tooth structure. Keywords: Amalgam; Composite; Material Choice; Pakistani Dentists
Gender Differences in Academic Performance in the subject of Pharmacology: A study conducted in a medical college
Authors: Ali Atif Moazzam , Tufail Sana , Anwar Khursheed , Firdous Asia , Asim Shazia , Hussain Hammad , Fatima Ajaz
Published: December 2021

Background: The proportion of female students is increasing progressively in medical schools, but concern remains about differing performance in exams. A limited data is available on comparison of academic performance of male and female students from developing countries. Aim: To compare them regarding their academic performance in the subject of pharmacology. Methods: This comparative study was conducted at Pharmacology departments of Sheikh Zayed medical college Rahim yar khan and Quaid-e-Azam medical college Bahawalpur among 3rd yr MBBS students of sessions 2019 and 2020. The overall attendance of students was counted and compared as well as all the pharmacology test results were evaluated and compared on the basis of previous record of fortnightly, end of module, midterm and end term examinations. Results: Girls outnumbered boys (528 girls vs 437 boys) in medical admissions. The girls were having better attendance and test results ( 92% vs 65% for better attendance & 26% vs 19% for better results) in both sessions 2019 and 2020. The results also showed that students from literate background and urban areas got more admission in medical college but more number of boys are boarders compared to girls who prefer to be day scholars due to social circumstances of South Punjab. Conclusion: The female students tend to perform better than boys in pre clinical subjects. The number of female medical students is increasing progressively and they out perform their male counterparts both in attendance and internal assessments. The study is documentation of this fact, for future measures that can be done for improvement of male students performance. Keywords: Gender difference, pharmacology, performance
Prevalence of depression and anxiety among male patients with COVID-19 in Lebsayyer Field Hospital, Qatar
Authors: Zainal Deen Nashwan , Al-Sharafi Amr , Abdalla Mohamed , Mushtaha Mohammed , Mohamed Ahmad , Saleem Sana , Nofal Yazan , Adil Shah Khoodoruth Mohamed , Al-Naimi Abdulla
Published: December 2021

Background: Depression and anxiety are major health problems found to be associated with various conditions. COVID-19 is a global pandemic that has a substantial effect on the worldwide population. This study aimed to assess the prevalence of depression and anxiety among male patients with COVID-19 and explore their relationship with participants’ characteristics.

Methods: This cross-sectional study was conducted among expatriate male patients with COVID-19 admitted to Lebsayyer Field Hospital in Qatar with mild COVID-19 (according to World Health Organization classification) from July till August 2020. The sample size was calculated using Cochran's formula based on disease prevalence. All eligible patients were invited to participate until reaching 400 participants, who then completed an anonymous survey of sociodemographic questions, Patient Health Questionnaire-9, and Generalized Anxiety Disorder-7 questionnaire, which are validated screening tools for depression and anxiety, respectively.

Results: Of the 400 participants, 148 (37.0%) and 77 (19.3%) reported depressive and anxiety symptoms, respectively. Depression was more prevalent among those 40–49 years old (p = 0.029), while anxiety was more prevalent among people aged  ≥ 50 (p = 0.456). Both depression (p = 0.009) and anxiety (p = 0.042) were more prevalent among Bangladeshi, followed by Filipino participants. Depression was more prevalent among those with the highest income (> 15,000 QR; p = 0.004), in contrast to anxiety, which was more prevalent among those with the lowest monthly income ( <  2,000 QR; p = 0.039).

Conclusion: The prevalence of depressive and anxiety symptoms is high among the study participants. Associated factors identified by the study were unsteady income, poor self-rated health, living with family, Southeast Asian ethnicity, and age group of 40–49 years.
Rezension von: Hildegard Heinz: Louis Braun (1836–1916) Skizzen aus dem Alltag. Begleitheft zur Ausstellung des Hällisch-Fränkischen Museums vom 24. September 2016 bis 8. Januar 2017
Authors: Göpfert Eberhard
Published: December 2021

Louis Braun (1836–1916) Skizzen aus dem Alltag. Begleitheft zur Ausstellung des Hällisch-Fränkischen Museums vom 24. September 2016 bis 8. Januar 2017. Hg. im Auftrag des Historischen Vereins für Württembergisch Franken e.V. von Herta Beutter und Armin Panter, Autorin Hildegard Heinz. Schwäbisch Hall (Oskar Mahl) 2016. 72 S., Abb.
Rezension von: Erwin Frauenknecht / Peter Rückert: Kaiser Karl IV. (1316–1378) und die Goldene Bulle
Authors: Baßler André
Published: December 2021

Erwin Frauenknecht, Peter Rückert: Kaiser Karl IV. (1316–1378) und die Goldene Bulle. Begleitbuch und Katalog zur Ausstellung des Landesarchivs Baden-Württemberg, Hauptstaatsarchiv Stuttgart. Stuttgart (Kohlhammer) 2017. 154 S.