bluuebunny/crossref_metadata_2025 huggingface dataset:
NGHIÊN CỨU THỰC NGHIỆM GIA CÔNG MÀI TINH BI ĐŨA TRỤ BẰNG ĐĨA MÀI GIẤY NHÁM
Authors: LÊ CHÂU NGỌC , NAM NGUYỄN ĐỨC
Published: January 2021

Bi đũa trụ là một chi tiết máy quan trọng và được ứng dụng rộng rãi trong các chi tiết máy, động cơ điện, công nghiệp xe máy, và các hộp số trong các động cơ truyền động. Nó có khả năng chịu tải trọng hướng tâm và tải trọng động cao do vòng lăn và bi đũa trụ tiếp xúc trực tiếp với nhau. Sự chính xác trong quá trình truyền động và tuổi thọ của bi đũa trụ phụ thuộc vào chất lượng bề mặt và độ chính xác hình dáng của các viên bi đũa trụ. Trong nghiên cứu này, quá trình mài tinh bi đũa trụ được tiến hành với đĩa mài bằng giấy nhám để nâng cao hiệu suất gia công, đạt được chất lượng bề mặt cao hơn trên máy mài 2 đĩa. Các thông số ảnh hưởng đến quá trình gia công như lực ép, kích thước hạt mài, hệ số ma sát được khảo sát trong bài báo này. Dựa trên kết quả gia công, quá trình mài bằng đĩa mài giấy nhám cải thiện đáng kể chất lượng bề mặt gia công và lượng vật liệu được cắt gọt. Kết quả thực nghiệm chỉ ra rằng, độ nhám bề mặt cải thiện đáng kể từ Ra = 0,17 μm xuống còn 0.027 µm và hiệu suất gia công tăng lên.
EXPERIMENTAL RESEARCH TO DETERMINE THE AFFECT OF AGENT TO THE QUALITY OF SYNGAS ON UPDRAFT GASIFIER MODEL
Authors: HOÀI LÊ ĐÌNH NHẬT , THÀNH BÙI TRUNG
Published: January 2021

The thermal performance of the gasification process depends on many factors, in which gasification agent is one of the major factors affecting the quality and heat value of syngas. This research uses the empirical method to determine the effect of the gasification agent on the quality and heat value of the syngas when changing the composition of oxygen and steam. Experimental model of gasification using rice husk and coal materials with type of Top Lift UpDraft gasifier (TLUD). The results show that when using the air as an agent, at the equivalent ratio (ER) of about 0.25, the gas product produces the highest calorific value (3835 kJ/Nm3). As the oxygen concentration increases by 70% in the agent, the heat value increases considerably (8646 kJ/Nm3), but requires a pure oxygen supply. The addition of steam increased the calorific value of the gas product, but was negligible (an increase of 0.28% as the S/A ratio went from 0 to 7). The experiment also showed that with the ratio of S/A = 0.5, the quality of gas products is the best.
MỘT SỐ GIẢI PHÁP NÂNG CAO HIỆU QUẢ GIẢNG DẠY CÁC MÔN LÝ LUẬN CHÍNH TRỊ Ở TRƯỜNG ĐẠI HỌC CÔNG NGHIỆP THÀNH PHỐ HỒ CHÍ MINH
Authors: HẢO BÙI THỊ
Published: January 2021

Từ thực tiễn giảng dạy tại Trường Đại học Công nghiệp thành phố Hồ Chí Minh, tác giả phân tích thực trạng, đề xuất giải pháp phù hợp nhằm nâng cao hiệu quả giảng dạy các môn Lý luận Chính trị, góp phần thực hiện cam kết với người học, với xã hội về chất lượng, uy tín của Nhà trường trong giai đoạn hiện nay.
NGHIÊN CỨU PHÂN BỐ HIỆU SUẤT CỦA HỆ PHỔ KẾ GAMMA PHÔNG THẤP SỬ DỤNG ĐẦU DÒ GERMANIUM SIÊU TINH KHIẾT
Authors: ÂN VÕ XUÂN
Published: January 2021

Trong phép đo hoạt độ phóng xạ của các mẫu môi trường hoạt độ thấp bằng hệ phổ kế gamma phông thấp sử dụng đầu dò germanium siêu tinh khiết (high purity germanium - HPGe), vấn đề nâng cao hiệu suất ghi của đầu dò thường được quan tâm nhằm giảm thiểu thời gian đo và do đó cải thiện chất lượng phổ gamma. Nguồn đo dạng trụ và dạng Marinelli được sử dụng rộng rãi để đáp ứng yêu cầu nói trên nhưng cơ sở khoa học của việc lựa chọn các hình học nguồn đo này vẫn chưa được xây dựng một cách đầy đủ. Do vậy, việc nghiên cứu phân bố hiệu suất của hệ phổ kế là rất cần thiết. Trong công trình này, chương trình MCNP5 được sử dụng để mô phỏng phổ gamma của nguồn điểm đặt tại vị trí bất kỳ trong không gian đặt mẫu đo của hệ phổ kế và hiệu suất ghi của đầu dò được tính toán để xác định phân bố hiệu suất. Ngoài ra phân bố hiệu suất cũng được khảo sát khi thay đổi năng lượng gamma và mật độ chất nền của không gian đặt mẫu đo. Kết quả cho thấy rằng có hai vùng hiệu suất cao tập trung ngay sát đỉnh đầu dò và tại mặt bên đầu dò, phù hợp tốt với quan điểm lựa chọn hình học nguồn đo dạng trụ và dạng Marinelli
DETERMINANTS OF NON-PERFORMING LOAN IN COMMERCIAL BANKS: EVIDENCE IN VIETNAM
Authors: QUOC TRUNG NGUYEN KIM
Published: January 2021

The main purpose of the article is to model the main factors affecting non-performing loan incurred in the process of lending to clients in Vietnam's commercial joint stock banks during the period of 2009 - 2017. The theories and empirical research studies for the macro and micro factors affecting nonperforming loan are mentioned in the research paper. Using the qualitative research method and the quantitative research, the article analyzes the practical credit situation of the whole banking system in Vietnam and non-performing loan ratios of selected banks. In addition, the Generalized Method of Moments (GMM) is used in the study to model the major factors impact on non-performing loan. The final results showed that the paper has constructed two models with the result as followed, the first model has six statistically significant variables while the second one has only five variables statistically significant.
KEY AUDIT MATTERS PRACTICES IN CONSTRUCTION SECTOR: EVIDENCE OF MALAYSIAN MARKET
Authors: HASHIM UMMI JUNAIDDA , AHMAD NORSIAH , ABDULLAH WAN AMALINA WAN , SALLEH ZALAILAH
Published: January 2021

This paper examines the reporting of Key Audit Matters (KAMs) in independent auditor‟s report for construction sector in the Malaysian market. It also aims to identify whether the specific characteristics of construction company will influence the KAMs reporting for Malaysian companies. The sample covers all construction companies listed on Bursa Malaysia with available data one year upon the implementation of KAMs. This business sector has been the subject of the study due to the fact that construction sector, despite being a high-risk sector, is among important sectors that contribute to the development of the economy of a country. The objective of the study is achieved through content analysis. The maximum and minimum number of KAMs disclosed are six and one respectively for this sector. The main issue addressed as KAMs in construction sector is revenue. The revenue recognition in the construction sector is affected by the unexpected occurrences and this, in turn, will affect the estimated cost and profit. The findings discover that the practice on the KAMs disclosed has been critically assessed by the auditors, but there is exception on some of the practice. In the construction sector, the items listed as KAMs basically relates to areas that required a significant amount of judgement from auditors (matters that involve high uncertainty estimation). However, for some of the KAMsdisclosure, 24% of the sample do not highlight the reason of why the items listed as KAMs. This circumstance would provide questions whether auditors had dismissed the guidelines of the disclosure of KAMs or auditors did not understand the KAMs‟ practices comprehensively. Therefore, further monitoring is needed to ensure the successful implementation of KAMs. This study only covers a limited sample of one year upon implementation of KAMs. It provides an empirical data and description on Key audit matters (KAMs) disclosure in the independent auditor‟s report of the Malaysian Listed company.
Examination of logistics systems of concentrated sets of urban delivery points by simulation
Authors: Lajos Sárdi Dávid , Bóna Krisztián
Published: January 2021

In the field of logistics, the examination of urban concentrated sets of delivery points (e.g. shopping malls or markets) is an important, new area. In these sets, there is a relatively large number of stores with significant goods traffic, which generate significant customer traffic, air and noise pollution, while their logistics systems are not properly designed. Despite all this, city logistics research does not specifically target this field, there are no models that can be used to examine any kind of urban concentrated sets of delivery points. Earlier, only few subsystems have been examined, so we started to study and model the concentrated sets of delivery points generally. As a first step in our research project, we collected data about concentrated sets of delivery points, and this data made it possible to start the simulation modelling and to develop new solutions.
Extended Reality, Intelligent Agents and Simulation to improve Efficiency, Safety and Security in Harbors and Port Plants
Authors: Bruzzone Agostino G. , Massei Marina , Sinelshchikov Kirill , Fadda Paolo , Fancello Gianfranco , Fabbrini Giuliano , Gotelli Marco
Published: January 2021

The paper introduces a new project devoted to develop a simulation-based solution for improving emergency planning and crisis management in critical infrastructures such as seaports and related terminal. The research aims to investigate the use of Artificial Intelligence and Simulation jointly with Extended Reality in this framework.
Моделирование, разработка и исследование робототехнологических систем управления процессами обогащения полезных ископаемых
Authors: Хорольский Валентнин
Published: January 2021

В монографии изложены основные теоретические положения проектирования гибких робототехнологических комплексов, робототехнических систем контроля и управления сложными процессами дробления и обогащения руд. Рассмотрены методы расчета и проектирования робототехнических систем, использующие аппарат искусственных нейронных сетей и нечетких множеств. Отражены центральные положения теории идентификации сложных нелинейных процессов производства концентратов в условиях неопределенности. Описаны интеллектуальные технологии, позволяющие создавать робототехнологические системы контроля и управления с экспертными оценками на правилах, системы на нечеткой логике и искусственных нейронных сетях, распределенные системы согласованного управления процессами флотации. Монография предназначена для студентов, аспирантов и инженерам, а также научным работникам, занимающихся проектированием и исследованием робототехнологических комплексов, а также для всех тех кто работает и живет на территории с техногенными явлениями.
The Effects of Attrition on Grammatical Gender: A View from North American Icelandic
Authors: Björnsdóttir Sigríður , Westergaard Marit , Lohndal Terje
Published: January 2021

Heritage grammars have been argued to differ with respect to whether they are an instantiation of divergent attainment or attrition. Attrition and divergent attainment are not mutually exclusive and can even co-exist with respect to the same or different grammatical phenomena, but teasing these apart requires longitudinal studies or carefully selected cross-sectional data (Montrul, 2008; 2016; Polinsky, 2011). In this article we present data from a longitudinal corpus of letters written by a speaker of North American Icelandic over a span of seventy-two years. The earliest letters suggest that the writer acquired Icelandic consistent with the baseline. However, in the last thirty years of writing, non-target forms emerge in the corpus. Morphosyntax, notably grammatical gender and inflectional morphology, is the most affected domain of grammar. In this article we focus on the nature of the changes attested for grammatical gender across time. Our results show that gender assignment does not undergo a systematic re-analysis. However, the non-target gender agreement indicates the overuse of an agreement default, which may reflect a trend towards a systematic reduction of the gender agreement system.
Chinese Language Learning Motivation: A Comparative Study of Heritage and Non-heritage Learners
Authors: Wen Xiaohong
Published: January 2021

This study investigates attitudes and motivation that influence heritage and non-heritage students’ learning of Chinese as a second language, examining the similarities and differences among three subgroups: bilingual, heritage motivated, and non-heritage learners. The study uses the socio-educational model by Gardner (1985), the internal structure model (Csizér & Dörnyei, 2005), and the attribution theory (Weiner, 1985) for the investigation. Participants were 317 students enrolled in Chinese courses at three state universities in the U.S. The results demonstrated that positive learning attitudes and experience was the factor most predictive of motivational magnitude (intended learning efforts in the present) and direction (intended continuation of study in future). Instrumentality, rated very highly across the three subgroups, appeared as the second significant predictor for intended continuation of study in future) with both groups of heritage learners. Although the bilinguals and heritage motivated learners did not differ significantly in most motivational factors, significant differences were observed between the heritage and non-heritage learners on most other factors. Heritage learners, especially Chinese bilinguals, seemed to be more likely to attribute their success in the course to uncontrollable and/or external factors and failure to internal factors.

Heritage learners may desire to learn their heritage language (HL) instead of other foreign languages due to socio-cultural influences. Studies of Chinese heritage learners (Chao, 1997; He, 2008) have demonstrated that learners may study Chinese to search for their ethnic identities and recover the roots of neglected cultural heritage. Research (Fishman, 2001; Valdés, 2001; Li & Duff, 2008; Wiley, 2001) also has shown that heritage and non-heritage learners may differ not only in linguistic and cultural backgrounds but also in socio-psychological and affective dimensions. Considerable work has been done comparing the linguistic similarities and differences between HL and non-HL learners of the same language (see Comanaru and Noels, 2009, for a comprehensive account), but much less has examined learners’ motivational and affective factors in their second language (L2) learning. The present study investigates attitudes and motivation of heritage and non-heritage learners in learning Chinese as a L2 at the university level in the U.S.
ASSOCIATION BETWEEN LIPID LEVELS AND DIABETES MELLITUS IN PATIENTS WITH ACUTE MYOCARDIAL INFARCTION
Authors: Jaleel Farhan , Qureshi Muhammad Sameer , Bhatti Shameem , Ghanghro Allah Bux , Aqil Saima
Published: January 2021

Objective: This study was done to determine the association between lipid levels and diabetic Indices in confirm patients of myocardial infarction with versus without diabetes mellitus type II. Methodology: Two hundred acute myocardial infarction having ST-segment elevation patients with diabetes mellitus type II and without diabetes mellitus type II were enrolled. Lipid levels and diabetic indices were measured, and the correlations among them were analyzed. Results: Positive correlations were found between triglycerides and fasting blood sugar, low density lipoprotein and Insulin when compared among myocardial infarction patients. Comparison among myocardial infarction patients with diabetes mellitus type II and without diabetes mellitus type II, negative correlations were found between triglycerides and glycosylated hemoglobin (HbA1C), low density lipoprotein and glycosylated hemoglobin, glycosylated hemoglobin and Insulin. Conclusion: Correlations between lipid levels and diabetic indices when compared were found to be Positive in myocardial infarction patients only and Negative when compared between myocardial infarction patients with diabetes mellitus type II and without diabetes mellitus type II.
SIDE BRANCH PLAQUE SHIFT IN BIFURCATION LESIONS IN CORONARY ARTERIES AND LOW DENSITY LIPOPROTEIN AS ITS MARKER
Authors: Ozdemir Betul
Published: January 2021

Objective: In this study, the effect of lipid profile on plaque shift was investigated considering the known effect of atherosclerosis. Methodology: A total of 660 patients, 457 males and 203 females, participated in the study. Average age is 60.3 ± 12 years. Two study groups included this study one was no plaque shift, the other one was plaque shift group. Results: In laboratory parameters of all groups triglyceride mean 164.7± 132.3 mg/dl, HDL mean 40± 11.1 mg/dl and LDL mean 129.1± 43.3 mg/dl were calculated. In lipid profile TG and HDL has no differences in two groups. Mean of HDL 40.6±11.2 mg/dl in no plaque shift group and 39.4±11.0 mg/dl in plaque shift group. And also mean of TG 167.8±145.5 mg/dl and 161.1±115.6 mg/dl consecutively. LDL mean was 123.9±43 mg/dl in no plaque shift group, 135.1±42.9 mg/dl in plaque shift group. Only high LDL levels correlated with plaque shift degree, plaque shift length and shift lesion percentage difference before and after the procedure. Conclusion: There is a correlation between LDL levels and plaque shift in coronary bifurcation lesions due to the volume of lipid core in plaque formation. The benefit is to predict the plaque shift that may occur in coronary bifurcation interventions with an easily measured parameter before the procedure.
STATUS OF MEDICATION COMPLIANCE AMONG PATIENTS WITH HYPERTENSION: A GLOBAL CHALLENGE
Authors: Ahmad Israr , Shaheen Asmat
Published: January 2021

Medication compliance among hypertensive patients is poor, affecting a large population which can be noted in the form of increased morbidity and mortality worldwide. Further, uncontrolled hypertension (HTN) can lead to multiple complications on the basis of gender and age. The aim was to explore the existing literature related to medication compliance among patients with hypertension. In this regard, literature search both nationally and internationally has been conducted. In conclusion, avoiding sedentary life style, awareness and counselling as well as family involvement, availability of anti-hypertensive medications in government hospitals and team based approaches are required for improving medication compliance among these patients. Qualitative researches are needed for exploring the challenges related to anti-hypertensive medication compliance both from patients and health care professionals’ perspectives.
AKTIVITAS ANTELMINTIK EKSTRAK ETANOL 96% DAUN SUKUN (Artocarpus altilis) TERHADAP Ascaridia galli SECARA In Vitro
Authors:   Sekolah Tinggi Teknologi Industri dan Farmasi Bogor, Cahaya Himawan Herson , Ramani Sofyan , Hamonangan Andi
Published: January 2021

Infeksi cacing usus yang utama disebabkan oleh cacing Ascaris lumbricoides, infeksi ini memiliki tingkat prevalensi cukup tinggi di Indonesia sehingga memerlukan pengobatan. Penelitian ini bertujuan untuk mengetahui aktivitas antelmintik ekstrak etanol 96% daun sukun (Artocarpus altilis) terhadap cacing Ascaridia galli dengan berbagai konsentrasi ekstrak yaitu 5%, 10% dan 15%. Penelitian uji aktivitas antelmintik ini dibagi menjadi 3 kelompok perlakuan, Konsentrasi 5%, 10% dan 15% dari ekstrak etanol 96% merupakan kelompok perlakuan.Kelompok perlakuan kontrol positif dengan Pirantel pamoat 0,25% dan NaCl 0.9% merupakan kelompok kontrol negatif. Masing-masing kelompok perlakuan dilakukan dengan metode perendaman pada cacing Ascaridia galli. Hasil penelitian menunjukkan bahwa aktivitas antimiltik ekstrak etanol dengan konsentrasi 15 % dari daun sukun (Artocarpus altilis) lebih baik dari ekstrak daun sukun yang memiliki konsentrasi 5% dan 10%. Hasil penelitian menunjukkan konsentrasi yang lebih besar dari ekstrak etanol daun sukun (Artocarpus altilis) akan menghasilkan aktivitas antelmintik yang lebih baik terhadap cacing Ascaridia galli, sktivitas yang lebih baik ini ditunjukkan dari data aktivitas pada konsentrasi i 5%, 10% dan 15%.
EVALUASI PENGGUNAAN ANTIBIOTIK PASIEN INFEKSI SALURAN PERNAFASAN AKUT (ISPA) DENGAN METODE ATC/DDD DI PUSKESMAS BEJI DEPOK PERIODE JANUARI-JUNI 2019
Authors:   Sekolah Tinggi Teknologi Industri dan Farmasi Bogor, Effendi Ferry , Evelin Anastasia
Published: January 2021

Prevalensi ISPA yang cukup tinggi di Indonesia mempengaruhi pola penggunaan obat, terutama antibiotik di fasilitas kesehatan. Sekitar 30-80% pasien diresepkan antibiotik dan penggunaannya tidak rasional, Laporan Tahunan Puskesmas Beji tahun 2018 menunjukkan ISPA merupakan penyakit yang paling banyak ditemukan, yaitu sekitar 30,97% kasus. Tujuan dari penelitian ini untuk mengetahui evaluasi penggunaan antibiotik pada pasien ISPA di Puskesmas Beji dengan metode Anatomical Therapeutic Chemical (ATC)/Defined Daily Dose (DDD). Penelitian ini dilakukan secara deskriptif dengan desain studi potong lintang (cross sectional). Metode pengumpulan data dilakukan secara retrospektif dengan purposive sampling. Sampel dalam penelitian ini menggunakan rumus slovin diambil dari populasi yang memenuhi kriteria inklusi dan eksklusi. Rekam Medis pasien yang memenuhi kriteris inklusi dan eksklusi sebanyak 104 Rekam medis. Hasil analisis bedasarkan sosiodemografi pasien ISPA terbanyak berjenis kelamin perempuan dan kelompok usia remaja akhir 17-55 tahun. Diagnosa ISPA terbanyak Acute pharyngitis, unspecified. Antibiotik yang digunakan Amoxicillin 500 mg, Ciprofloxacin 500 mg, Cotrimoxsazole 480 mg, Cotrimoxsazole 960 mg, Erythromycin 500 mg, dan Thiamphenicol 500 mg. Penggunaan Obat dinyatakan nilai DDD/1000/pasien yaitu Amoxicillin 500 mg (16,2062); Ciprofloxacin 500 mg (1,1039); Cotrimoxsazole 480 mg (0.460); Cotrimoxsazole 960 mg (0.3683); Erythromycin 500 mg 0,2762); dan Thiamphenicol 500 mg (0,5524). Obat yang menyusun segmen DU90%, yaituAmoxicillin 500 mg (85.44%) dan Ciprofloxacin 500 mg (5.83%).
PENGARUH FRAKSINASI BUNCIS (PHASEOLUS VULGARIS L.) TERHADAP PENURUNAN KADAR KOLESTEROL TIKUS PUTIH (RATTUS NORVEGICUS L.) YANG HIPERKOLESTEROLEMIA
Authors:   Sekolah Tinggi Teknologi Industri dan Farmasi Bogor, Sulastri Lilik , Syafalia Putri , Fauzi Isa Achmad
Published: January 2021

Hiperlipidemia merupakan suatu keadaan meningkatnya kadar lipid darah yang ditandai dengan meningkatnya kadar kolesterol total, Low Density Lipoprotein (LDL), dan trigliserida dalam darah yang melebihi batas normal. Sampai saat ini telah banyak obat yang digunakan untuk penanganan hiperlipidemia baik obat sintetik dan obat herbal. Salah satu obat herbal yang telah digunakan oleh masyarakat Indonesia adalah buncis (Phaseolus vulgaris L.). Tujuan penelitian ini adalah untuk mengetahui pengaruh beberapa ekstrak (n-heksan, etilasetat dan air) buah buncis terhadap penurunan kadar kolesterol tikus jantan galur Sprague Dawley yang telah diinduksi kuning telur puyuh, PTU 0,02% dan asupan pakan aterogenik selama 14 hari. Pengukuran kadar kolesterol dilakukan secara enzimatis dengan alat kolesterolmeter Easy Touch®. Hasil fraksinasi ekstrak etanol buncis dengan pelarut n-heksan, etil asetat, dan air diujikan selama 7 hari dengan dosis 50 mg/kg BB diperoleh fraksi air sebagai fraksi yang paling aktif menurunkan kadar kolesterol darah. Pada uji lanjutan fraksi air dilakukan terhadap 5 kelompok perlakuan (5x5 ekor), yaitu kelompok 1 (Na CMC 0,5%) sebagai kontrol negatif, kelompok 2 (simvastatin 0,18 mg/200 g BB) sebagai kontrol positif dan variasi dosis fraksi air 50 mg/kg BB, 100 mg/kg BB serta 150 mg/kg BB (kelompok 3, 4, dan 5). Selama 21 hari perlakuan tikus tetap diberikan pakan aterogenik dan pengukuran kadar kolesterol dilakukan pada hari ke 0, 14, 21, 28, dan 35. Hasil uji lanjutan menunjukkan bahwa fraksi air ekstrak buncis pada dosis 50 dan 100 mg/kg BB tidak memiliki perbedaan yang nyata dengan simvastatin, sedangkan pada dosis 150 mg/kg BB menunjukkan perbedaan yang nyata dangan simvastatin dalam menurunkan kadar kolesterol.
GAMBARAN HISTOPATOLOGI OTAK MENCIT (Mus musculus L) SETELAH PEMBERIAN FRAKSI DAUN SEMBUNG RAMBAT (Mikania micrantha Kunth) SEBAGAI AKTIVITAS NEUROPROTEKTAN
Authors:   Sekolah Tinggi Ilmu Kesehatan Harapan Ibu Jambi, Amelia Agdes , Andriani Yuni , Andriani Lili
Published: January 2021

embung rambat (Mikania micrantha Kunth.) diduga memiliki aktivitas neuroprotektan terhadap penyakit demensia, tanaman ini memiliki metabolit sekunder flavonoid. Penelitian ini bertujuan untuk mengetahui apakah fraksi daun sembung rambat memiliki aktivitas neuroprotektan berdasarkan gambaran histopatologi otak mencit. Metode yang digunakan yaitu ekstraksi lalu dilanjutkan dengan fraksinasi menggunakan metode ekstrak cair-cair dengan pelarut n-heksan, etil asetat dan n-butanol kemudian diuji dengan menggunakan 25 ekor mencit jantan yang terdiri atas 5 perlakuan. Pada perlakuan ini terdiri dari kontrol negatif (diazepam), kontrol positif (piracetam), dan perlakuan fraksi T1, T2 & T3 dengan dosis 500 mg/kgBB dalam waktu pemberian selama 14 hari. Pengamatan histologi otak dilakukan dengan cara mengeutinasi dihari ke-15 setelah pemberian masing-masing perlakuan. Potongan otak bagian hipokampus diamati dengan pewarnaan Hematoksilin dan Eosin (HE). Hasil pengamatan histopatologi otak terhadap sel neuron pada kelompok uji kontrol negatif (diazepam), fraksi etil asetat (T2), dan fraksi n-heksan (T1) menunjukkan banyaknya nekrosis sel (kematian sel) neuron. Sementara pada kelompok uji fraksi n-butanol (T3) dan piracetam menunjukkan sedikitnya nekrosis sel (kematian sel) neuron. Nekrosis sel (kematian sel) ditandai dengan sel neuron otak dengan inti yang mengkerut dan sitoplasma berwarna lebih eosinofilik. Berdasarkan hasil penelitian yang telah dilakukan dapat disimpulkan bahwa Fraksi daun sembung rambat memiliki aktivitas sebagai neuroprotektan.
New data on absolute age, petrology and potential of ore mineralization within Murzinsky intrusive massif (northwestern Altai)
Authors: Gusev Anatoly , Gusev Nikolay
Published: January 2021

The geological, petrogeochemical data, absolute age dating and information about endogenetic ore mineralization of Murzinsky intrusive massif of Altai are presented. Comparison of rock compositions and melanocratic inclusions suggests that gold potential of deep spot melting is related to hybrid melts forming as basalt and crust acidic magma mixed. Along with skarn, the ore field could host copper-gold-porphyry mineralization. Gold was supplied from acidic melting as a result of amphibolites and lower crust greywacke melting.
The Voice Test for Newborn Hearing Screening
Authors: Gloria-Cruz Teresa Luisa I. , Abes Genereso T. , Abes Franco Louie LB.
Published: January 2021

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Eficacia de dos técnicas de acondicionamiento para la atención odontológica de niños de 6 a 10 años de edad de una escuela pública de Quito-Ecuador
Authors: Loayza Susana , Azanza Sofía
Published: January 2021

Este estudio compara dos técnicas de acondicionamiento para atención infantil, que son; la técnica de decir, mostrar y hacer, la técnica de distracción visual-auditiva; para de esta manera poder identificar el grado de aceptación y colaboración de los niños al tratamiento preventivo con sellantes. Se realizaron dos citas para la atención: en la primera se llenó la historia clínica y la profilaxis, en la segunda se realizó un sellante. Se utilizó la escala de Frankl para poder valorar el comportamiento antes y después de la aplicación de un sellante, Como resultado, las dos técnicas demostraron tener la misma efectividad, pero, en casos donde niños llegan con experiencias negativas es mucho más efectiva la técnica decir, mostrar y hacer. Se concluye que las técnicas de acondicionamiento decir, mostrar y hacer, más la técnica de distracción visual- auditiva son eficaces para que los niños acepten de mejor manera el procedimiento preventivo con la colocación de sellantes.
Comparing the Performances of MPPT Techniques for DC-DC Boost Converter in a PV System
Authors: ZONGO Oscar Andrew
Published: January 2021

The paper presents a comparison in terms of the performance of 3 maximum power point tracking methods used to achieve maximum output power from a photovoltaic system under varying irradiance. The maximum power point techniques considered in this study were Perturb and Observe, Incremental Conductance and Fuzzy logic. A literature review of related studies was conducted and a photovoltaic module modeling was presented. Moreover, a detailed theory of boost converter was also given. These 3 methods were discussed in detail and their flowcharts were presented. Simulation results from MATLAB/SIMULINK demonstrated a comparison between the 3 maximum power point tracking strategies. Results of current, voltage, and power from the photovoltaic module and the boost converter showed that the Fuzzy logic maximum power point tracking method had the best performance compared with other techniques.
Model for Modified Holographic Ricci Dark Energy in Gravitation Theory of Branc Dicke
Authors: DIXIT Archana , SINGHAL Shilpi , ZEYAUDDIN Mohd.
Published: January 2021

In this cosmological model, we have studied the spatially homogeneous and anisotropic Bianchi type and axially symmetric model filled with dark matter and dark energy in Brans-Dicke’s [1] theory of gravitation. Here, we consider the modified holographic Ricci dark energy defined by Chen and Jing [21] as the suitable condition of dark energy. To obtain a solution we assumed the scale factor  used Mishra et al. [43]. We have solved field equations of Brans-Dicke theory of gravitation with the help of an axially symmetric anisotropic Bianchi-type space-time. We have determined the cosmological parameters, namely, EoS parameter, MHRDE density, matter density, skewness parameter, and BD scalar field. Here the various phenomena like the expanding universe, and shift from anisotropy to isotropy are observed in this model. A detailed physical discussion of these dynamical parameters are presented graphically. Some physical and geometrical behaviours of the models are also discussed and found to be in good agreement with the recent observations (OHD+JLA) datasets.
Implicaciones del paradigma de conflicto en la evaluación educativa
Authors: Paulston Rolland G. , Di Costanzo James
Published: January 2021

Se delimitan las diferencias entre los estudios de evaluación educativa realizados desde la perspectiva ideológica del equilibrio y los conducidos bajo la del conflicto, señalando que el rol de los primeros es el de preservar el orden mediante la reducción del conflicto, así como legitimar la estructura social existente, mientras que las evaluaciones enmarcadas en el paradigma del conflicto están orientadas hacia el logro de una creciente conciencia de la existencia de conflicto, con el fin de defender o promover a los grupos desfavorecidos, así como de examinar los elementos de justicia e igualdad social de los programas. Se concluye que un modelo de estas características es de naturaleza mucho más descriptiva que los de los enfoques evaluativos tradicionales, si bien no excluye los métodos cuantitativos.
Las prácticas educativa y docente en un grupo de profesores universitarios
Authors: Pérez Ornelas María Isabel
Published: January 2021

Se problematiza la acción del profesorado para caracterizar las prácticas docente y educativa al nivel superior, a fin de hacer visible lo que sucede en el aula. Por ello, se tematiza sobre estos dos tipos de práctica, desde su acepción más simple hasta la apoyatura teórica. Finalmente, se articula la discusión conceptual con un grupo de maestros de la Facultad de Economía de la UNAM; en este sentido, se describen los hallazgos de su análisis.
URDU: فلسفہ جبرو قدر کی قرآنی حیثیت
Authors: Dr. Muhammad Hanif  , Dr. Javed Iqbal
Published: January 2021

The concept of fate luck and destiny, the philosophy of Jabr-O-Qadar in other words the philosophy of destiny remained very significant and to some extent a controversial subject of debate among the muslim thinkers, writers and philosophers in particular and it remained a hot subject of discussion among the world intelligentsia as a general as well. A number of schools of thought along with individual scholars approached that particular subject with their own specific ideas and interpretations by presenting their logic, evidences and explanations having the fact that all referred the Holly Quran as a fundamental source of inspiration. It has also been explained that to what extent the humanity may depend on its free will and despite of the Almighty Allah's decision of destiny for the human being. What a person can do with his free will in this world and what he can't do. What is the real status of luck and fate and what is the true sprits of the concept of destiny in the context of Quranic verses and to what extent the various Islamic schools of thought represent the true Quranic spirits. To explain and elaborate all these concepts the Quranic verses have been given and analyzed in this paper.
Pengelolaan Sumber Daya Manusia di Rintisan Sekolah Menengah Atas Bertaraf Internasional Majlis Tafsir Al-Qur’an (R-SMA-BI MTA) Surakarta
Authors: Ihlas Ihlas , Sukrin Sukrin , Munandar Aris
Published: January 2021

Penelitian ini mengkaji tentang Manajemen Sumber Daya Manusia (MSDM) di Sekolah Menengah Atas Standar Internasional Majlis Tafsir Al-Qur'an Surakarta. Riset ini adalah riset kualitatif-etnografi yang menghasilkan data deskriptif. Ini dilakukan di R-SMABI MTA Surakarta Jawa Tengah. Studi ini merupakan penelitian kualitatif dengan etnografi ini berfokus pada budaya, perencanaan, penempatan dan atau pengembangan serta evaluasi Sumber Daya Manusia (SDM). Tujuannya, menggali model pengelolaan dan pengembangan SDM di R-SMA-BI MTA Surakarta. Temuan penelitian ini adalah: Pertama, budayanya sudah kondusif. Kedua, perencanaan SDM yang disesuaikan dengan analisis kebutuhan dengan kebutuhan penting seorang muslim, dan kondisi lain yang mendukung. Ketiga, beberapa penempatan sumber daya manusia tidak memenuhi kualifikasi akademik dan kompetensi. Sedangkan kualifikasi SDM belum memenuhi standar R-SMA-BI. Untuk kesehatan dan kesejahteraan SDM juga sudah diatur. Ketiga, evaluasi yang dilakukan pemerintah dan sekolah dengan berbagai model.
PENGARUH PENGGUNAAN MEDIA POP-UP TERHADAP KETERAMPILAN MENULIS DESKRISI TEMA BUMI DAN ALAM SEMESTA SISWA KELAS III SDIT AT-TAQWA SURABAYA
Authors: Tanalinal Khasna Fenny , Syahril Muh Abdul
Published: January 2021

Tujuan penelitian ini untuk mengetahui pengaruh penggunaan media pop-up dalam keterampilan menulis deskripsi dan  pengaruh penggunaan media pop-up terhadap keterampilan menulis deskripsi siswa kelas III SDIT At-Taqwa Surabaya. Jenis penelitian yang digunakan adalah pre-experimental design. Rancangan penelitianyang digunakan adalah  one  group  pretest-posttest design.

Pengumpulan data dilakukan dengan observasi dan tes (pretest dan posttest). Instrumen yang digunakan adalah lembar observasi penggunaan media pop-up dalam pembelajaran menulis deskripsi dan soal tes tentang deskripsi. Teknik analisis data dimulai dari uji validitas instrumen observasi dan instrumen tes.

Data yang diperoleh diolah dengan statistik parametrik dan uji-t. Pada uji-t diperoleh hasil  diketahui bahwa harga thitung lebih besar daripada harga ttabel (10,027 > 2,060). Berdasarkan hasil yang diperoleh maka dapat disimpulkan bahwa terdapat pengaruh yang signifikan penggunaan media pop-up terhadap keterampilan menulis deskripsi siswa.
Analisis Tata Kelola Standar Pendidik Dan Tenaga Kependidikan Pada Pendidikan Tinggi Vokasi Kemaritiman Di Indonesia
Authors: Hartanto Cahya Fajar Budi , Haryani
Published: January 2021

This study aims to reveal how the enactment of the provisions related to the standards of lecturer and educational staff in maritime vocational higher education in Indonesia. In the governance system, actually the existing regulatory instruments in Indonesia are sufficient. However, the problem is at the level of implementation with consideration of the limitations in vocational education. One of them is the limitation of lecturer and educational staff who meet the qualifications. This research uses literature study and direct observation conducted by researchers as a method of data collection. As for the discussion, a qualitative descriptive approach was used. The result of this study indicates that the governance of the standard of lecturer and educational staff in maritime vocational higher education still needs to be addressed to close existing gaps. The best solution to this problem is the willingness of all stakeholders to sit together to formulate things that so far have yet to be agreed upon. Hopefully, with better governance, there will be enough qualified lecturer and educational staff to support the achievement of overall Indonesian maritime quality standards.

Penelitian ini bertujuan untuk mengungkapkan bagaimana pemberlakuan dari ketentuan terkait standar pendidik dan tenaga kependidikan di pendidikan tinggi vokasi kemaritiman di Indonesia. Secara sistem tata kelola, sebetulnya perangkat peraturan yang ada di Indonesia sudah cukup. Namun, permasalahannya adalah pada tataran implementasi mengingat adanya keterbatasan-keterbatasan di pendidikan vokasi. Salah satunya adalah keterbatasan pendidik dan tenaga kependidikan yang memenuhi kualifikasi. Penelitian ini menggunakan studi pustaka dan observasi langsung yang dilakukan oleh peneliti sebagai metode pengumpulan data. Adapun dalam pembahasannya, digunakan pendekatan deskriptif kualitatif. Hasil dari penelitian ini menunjukkan bahwa tata kelola standar pendidik dan tenaga kependidikan pada pendidikan tinggi vokasi kemaritiman masih perlu terus dibenahi guna menutup celah-celah yang ada. Solusi terbaik dari permasalahan ini adalah adanya kesediaan seluruh pemangku kepentingan untuk duduk bersama merumuskan hal-hal yang selama ini masih belum dapat disepakati. Harapannya dengan tata kelola yang semakin baik, maka akan tersedia cukup pendidik dan tenaga kependidikan yang berkualitas untuk menunjang tercapainya standar mutu kepelautan Indonesia secara menyeluruh.
The Semiconductor Supply Chain: Assessing National Competitiveness
Authors:   Center for Security and Emerging Technology, Khan Saif M. , Mann Alexander , Peterson Dahlia
Published: January 2021

Semiconductors are a key component in fueling scientific progress, promoting economic advancement, and ensuring national security. This issue brief summarizes each component of the semiconductor supply chain and where the United States and its allies possess the greatest leverage. A related policy brief, “Securing Semiconductor Supply Chains,” recommends policy actions to ensure the United States maintains this leverage and uses it to promote the beneficial use of emerging technologies, such as artificial intelligence.
The Utilization Of Geography Learning Media At High School In Karanganyar Regency
Authors: Husyain Rifai Muh
Published: January 2021

Abstract

 

The purpose of this study is to find out about the availability of learning media, including 1) Type, 2) Amount, and 3) Conditions. The research carried out is descriptive research with research data is quantitative data. The study was conducted in 23 high schools in Karanganyar Regency. The population in this study were all high school geography teachers and high school students of class X, XI Social Program and XII Social Program in Karanganyar Regency, which consisted of 17 state high schools and 6 private high schools. The high school which was used as the research subject was determined by proportional random sampling technique to obtain 13 high schools. Futhermore, the samples of teachers and students was determined by purposive sampling, where in each school took 1 teacher respondent and 6 students, so the total sample of teachers was 13 people and students were 78 people. The technique of collecting data in the study uses questionnaire, interview and observation methods. The analysis technique used is descriptive statistical analysis. In summary, from this research found the data condition of geography learning media of  high school in Karanganyar Regency in 2016 were obtained, including; 1) The most types of media are Atlas, Pictures, Globe, Maps, Slide Powerpoint, and Computer / Laptop devices, 2) The number of media is classified as medium or available in every media in the school, and 3) The condition of the media is classified as poorly maintained for physical media and is very well maintained for media based on Digital Information Technology.
THE EFFECT OF ADHESIVE PAPER WASTE WEIGHT PERCENTAGE IN BIOBRIQUET DERIVED FROM CASSAVA SKIN WASTE
Authors: Firdaus Aneka , Panae Aditha Verdinan
Published: January 2021

Cassava skin waste is waste originating from cassava plants from tapioca flour factories or cassava processed product factories. Indonesia is one of the biggest countries that produces cassava. The number of cassava processing industries in Indonesia is large so that a positive correlation can be drawn that the high amount of cassava processed will produce more cassava skin waste. Based on the results of tests conducted, the higher the composition of the Each cassava can produce 10-15% of cassava skin waste. Cassava skin waste is directly removed, can cause buildup that results in environmental damage. Cassava skin waste is obtained from local farmers, where on average each cassava produces 10-15% of waste. In general, this waste is not used and just thrown away. This research was conducted with the main ingredients of cassava peel waste and adhesive made from used paper. The composition of the mixture of cassava peel and used paper varies, where the percentage by weight of the adhesive starts from 7.0% to 10% with an increase in the composition every 0.5%. Then the biobriquette carbonization process was carried out at a temperature of 400 ° C. The biobriquette characterization was carried out based on ASTM standards to analyze water and ash, volatile matter and heating value. The results of the analysis on the composition of the lowest cassava bark had the highest heating value of 5888 cal / gr with the lowest water, ash and volatile matter content.
Ideas and perspectives: Emerging contours of a dynamic exogenous
kerogen cycle
Authors: Blattmann Thomas M.
Published: January 2021

Abstract. Growing evidence points to the dynamic role that kerogen is playing on Earth's surface in controlling atmospheric chemistry over geologic time. Although quantitative constraints on the weathering of kerogen remain loose, its changing weathering behavior modulated by the activity of glaciers suggest that this largest pool of reduced carbon on Earth may have played a key part in atmospheric CO2 variability across recent glacial-interglacial times and beyond. This work enunciates the possibility of kerogen oxidation as a major driver of atmospheric CO2 increase in the wake of glacial episodes. This hypothesis of centennial and millennial-timescale-relevance for this chemical weathering pathway is substantiated by several lines of independent evidence synthesized in this contribution including the timing of CO2 increase, CO2 isotopic composition (13C and 14C), seawater osmium record, kerogen oxidation kinetics, observations of kerogen reburial, and modeling results. The author hypothesizes that the deglaciation of kerogen-rich lithologies in western Canada contributed majorly to the characteristic deglacial increase in atmospheric CO2, which reached an inflection point ≤ 300 years after the Laurentide Ice Sheet retreated into the kerogen-poor Canadian Shield. To quantitatively constrain the contribution of kerogen oxidation to CO2 rise at glacial terminations, systematic studies on CO2 fluxes emanating from the weathering of different lithologies, oxidation kinetics of kerogen along glacial chronosequences, and high-resolution temporal changes in the aerial extent of glacially exposed lithological units are needed.
Sentinel-3 radar altimetry for river monitoring – a catchment-scale evaluation of satellite water surface elevation from Sentinel-3A and Sentinel-3B
Authors: Kittel Cecile M. M. , Jiang Liguang , Tøttrup Christian , Bauer-Gottwein Peter
Published: January 2021

Abstract. Sentinel-3 is the first satellite altimetry mission to operate both in synthetic aperture radar (SAR) mode and in open-loop tracking mode nearly globally. Both features are expected to improve the ability of the altimeters to observe inland water bodies. Additionally, the two-satellite constellation offers a unique compromise between spatial and temporal resolution with over 65 000 potential water targets sensed globally. In this study, we evaluate the possibility of extracting river water surface elevation (WSE) at catchment level from Sentinel-3A and Sentinel-3B radar altimetry using Level-1b and Level-2 data from two public platforms: the Copernicus Open Access Hub (SciHub) and Grid Processing on Demand (GPOD). The objectives of the study are to demonstrate that by using publicly available processing platforms, such databases can be created to suit specific study areas for any catchment and with a wide range of applications in hydrology. We select the Zambezi River as a study area. In the Zambezi basin, 156 virtual stations (VSs) contain useful WSE information in both datasets. The root-mean-square deviation (RMSD) is between 2.9 and 31.3 cm at six VSs, where in situ data are available, and all VSs reflect the observed WSE climatology throughout the basin. Some VSs are exclusive to either the SciHub or GPOD datasets, highlighting the value of considering multiple processing options beyond global altimetry-based WSE databases. In particular, we show that the processing options available on GPOD affect the number of useful VSs; specifically, extending the size of the receiving window considerably improved data at 13 Sentinel-3 VSs. This was largely related to the implementation of GPOD parameters. While correct on-board elevation information is crucial, the postprocessing options must be adapted to handle the steep changes in the receiving window position. Finally, we extract Sentinel-3 observations over key wetlands in the Zambezi basin. We show that clear seasonal patterns are captured in the Sentinel-3 WSE, reflecting flooding events in the floodplains. These results highlight the benefit of the high spatiotemporal resolution of the dual-satellite constellation.
Desarrollo y comunicación de la Ruta Etnoturística de San Basilio de Palenque (Colombia)
Authors: Solarte Pinta Esteban Armando , Montoya Pino Ana Patricia
Published: January 2021

San Basilio de Palenque es un corregimiento del municipio de Mahates en el Departamento de Bolívar (Colombia) declarado Patrimonio Inmaterial de la Humanidad por la Unesco en 2005. Ha encontrado en el turismo una oportunidad de visibilidad e ingresos económicos, lo que llevó a la comunidad en 2016 a proponer una Ruta Etnoturística. Es así como entre 2017 y 2018 se realizó un trabajo conjunto, entre la Mesa de Etnoturismo de San Basilio de Palenque, la Fundación Semana y la Escuela de Arquitectura y Hábitat de la Universidad de Bogotá Jorge Tadeo Lozano, con el fin de formular y desarrollar este proyecto concertado desde el territorio, a través de un laboratorio interdisciplinar y de creación participativa que estableció tres condiciones como punto de partida: 1) La valoración del “espacio cultural” palenquero, 2) Una mirada particular del territorio y 3) La relación entre cultura palenquera, patrimonio y turismo. En ese sentido, este documento sintetiza el proceso que permitió su diseño e implementación en el corregimiento.
Estrategias de marketing de las marcas de automóviles verdes. Entre la colaboración y la competición
Authors: Delgado Cadavid Gisel , Olaya Mora Santiago , Isaza Álvarez Jimena
Published: January 2021

La ciudad de Medellín actualmente sufre problemas de contaminación, cambio climático, enfermedades y otras situaciones ambientales que han entrado a generar falencias en la calidad de vida de las personas, es por esto que la generación de conciencia en el cuidado del medio ambiente se está incrementando no solo en la ciudadanía, sino también en la identidad de las marcas. Las elecciones de los consumidores comienzan a tomar un rumbo distinto a la hora de adquirir productos o servicios, ya que quieren contrarrestar el daño causado por la ola de contaminación en los últimos años, es por ello que se toman el tiempo de analizar qué impacto tiene sobre la naturaleza aquellos productos que consumen con frecuencia. Las empresas han notado estos cambios en la forma de comprar del consumidor y es la razón por la cual han ido implementando estrategias en cuanto al diseño de productos y la comercialización de estos. Esta investigación busca analizar qué estrategias están usando las empresas de automóviles para entrar en esta tendencia, de qué manera están haciendo uso de la publicidad para llegar a ese segmento de personas que son responsables con el medio ambiente y qué estrategias son llevadas a cabo en la ciudad de Medellín.