bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of varying friction coefficient on rolling pressure distribution
Authors: Davis F. , Andrews A. , Sackey M. N. , Owusu-Ofori S. P. 
Published: May 2021

Accurate characteristics of roll pressure distribution is essential in the estimation of the energy and power requirements for parts undergoing plastic deformation. The nature of the pressure distribution is very sensitive to the friction coefficient between the roller and the deformed part. The physics of the deformation process points to a variable friction coefficient, however, current research and practices result in the use of a constant friction coefficient. This work explored the development of a technique to determine a quantitative relationship between the variable friction coefficient and the process parameters. The pressure distribution was then developed within the contact region using the variable friction coefficient model. Results show that current approach used by industry (‘the rule of thumb’) overestimates the pressure distribution, compared to the current research, thus wasting power needed for the rolling operation by about 18%. Keywords: Rolling; varying friction coefficient; pressure distribution; power
Design and implementation of seat occupancy detection system
Authors: Kommey B. , Addo E. O. , Adjei K. A. 
Published: May 2021

Location of appropriate seats in seating areas of theaters remains a significant challenge that patrons of these enterprises face. There is therefore, the need for seat occupancy monitoring system to provide readily accessible seat occupancy information to clients and management of these halls. This paper presents the design and implementation of a low cost seat occupancy detection and display system which is capable of monitoring seat occupancy in halls efficiently. The system uses capacitive seat sensors which is designed based on the loading mode technology. It detects the presence of a human occupant using a single electrode. Occupancy data is relayed to a WiFi-enabled microcontroller unit which processes the data and wirelessly transfers the processed data to a central base station over a local area network for graphical and numerical display. Commands are also transferred from the base station to the microcontroller units when needed. Theoretical and empirical results show that the system is able to achieve seat occupancy monitoring accurately, neatly and cost effectively.Keywords: Capacitive sensing, seat occupancy, sensor cluster, microstrip transmission line, Wi-Fi
Optimizing Broadcast Spectrum through the Planning of Digital Television Network
Authors: Gbenga-Ilori A.O , Ladipo O. I. 
Published: May 2021

The transition from analogue to digital television promises an enormous digital dividend that can translate to spectrum resource provision for other services. In this work, the size of the spectrum that can be released as dividend after digital switchover in some selected States of Nigeria is estimated. First, the present analogue television (ATV) network coverage is compared with predicted digital terrestrial television (DTTV) network coverage during a simulcast period, and after ATV switch-off. The predicted DTTV network is initially planned with a multi-frequency network (MFN) and analysis showed that DTTV had a 12.5% improvement in spectrum utilization compared to ATV while achieving a better coverage probability of 95.3%. This work predicted further spectrum savings with the use of a single-frequency network (SFN) design for DTTV network planning. The analysis done showed that 87.5% of the ATV spectrum could be saved for other services after the transition to DTTV using SFN.
Keywords: Digital television, SFN, MFN, Spectrum, dividend
Effect of vitamin D combined with anti-tuberculosis drugs on serum IL-1β, IFN-γ and Th17 cell-associated cytokines for the management of spinal tuberculosis
Authors: Yu Fang , Cailiang Shen 
Published: May 2021

Purpose: To investigate the effect of combination of vitamin D and anti-tuberculosis drugs on serum interleukin-1β (IL-1β), interferon-γ (IFN-γ) and helper T 17 (Th17) cell-associated cytokine levels for the treatment of spinal tuberculosis (TB).
Methods: Ninety-two spinal TB patients were assigned without bias to two groups (46/group): study group (vitamin D combined with anti-TB drug group) and control group (anti-TB drug group). After treatment for 8 weeks, clinical effectiveness, adverse reactions, visual analog scale (VAS) score, spinal cord injury grade, and serum levels of IL-1β, IFN-γ, Th17, IL-10, TGF-β1, IL-17 and IL-23 were assayed with ELISA, and compared between groups.
Results: Study group total effectiveness was significantly higher than that in the control group (95.65 % vs 80.43 %, p < 0.05). Before drug administration, VAS score, degree of spinal cord injury and serum levels of IL-1β, IFN-γ, IL-10, TGF-β1, IL-17 and IL-23 were comparable in the study and control patients (p > 0.05). However, post-treatment, these parameters significantly decreased in both groups (p < 0.05), but were markedly lower in study group patients, relative to controls (p < 0.05).
Conclusion: The use of combined treatment of vitamin D and anti-TB drugs is an effective and safe way to alleviate inflammatory response and improve the immunity of spinal TB patients via the regulation of the levels of Th17 cell-related factors.
Polyp nội mạc tử cung phát hiện trong quá trình kích thích buồng trứng và kết cục chu kỳ chuyển phôi trữ sau cắt polyp
Authors: Lê Viết Nguyên Sa , Hoàng Ngọc Sơn , Lê Việt Hùng 
Published: May 2021

Giới thiệu: Polyp nội mạc tử cung là bất thường buồng tử cung thường gặp nhất, đặc biệt ở các phụ nữ vô sinh. Việc phát hiện các polyp nội mạc tử cung trong quá trình kích thích buồng trứng- Thụ tinh trong ống nghiệm (KTBT–TTTON) là khá thường gặp trên lâm sàng. Chuyển phôi tươi hay đông lạnh phôi ở các chu kỳ này vẫn còn nhiều bàn cãi.
Mục tiêu nghiên cứu: đánh giá kết cục chu kỳ chuyển phôi trữ sau phẫu thuật nội soi cắt polyp và so sánh với các chu kỳ chuyển phôi trữ (CPT) sau trữ phôi toàn bộ (TPTB) do các nguyên nhân khác.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu hồi cứu trên các bệnh nhân hoàn thành chu kỳ CPT đầu tiên sau khi trữ phôi toàn bộ do bất kỳ nguyên nhân nào khi thực hiện TTTON bằng phương pháp ICSI tại khoa Hỗ trợ sinh sản- Bệnh viện Trung Ương Huế trong khoảng thời gian từ tháng 01/2019 đến tháng 06/2020. Tiêu chuẩn chọn bệnh bao gồm: các chu kỳ TTTON bằng trứng tự thân, tuổi trẻ dưới 35 tuổi, có phôi ngày 3 chất lượng tốt có thể trữ đông bằng phương pháp thủy tinh hóa và vẫn ở tình trạng tốt sau khi rã đông. Tiêu chuẩn loại trừ bao gồm: chuyển ít hơn 2 phôi và nhiều hơn 3 phôi, không có ít nhất 1 phôi tốt, bệnh lý vòi tử cung hoặc LNMTC nặng. Các bệnh nhân được chia làm 4 nhóm: nhóm 1 gồm các bệnh nhân TPTB do polyp nội mạc tử cung phát hiện trong khi KTBT, nhóm 2 gồm các bệnh nhân TPTB do nguy cơ QKBT, nhóm 3 gồm các bệnh nhân TPTB do tăng Progesterone sớm và nhóm 4 TPTB do các nguyên nhân khác.
Kết quả: trong 379 chu kỳ KTBT bằng trứng tự thân, có 30 trường hợp mới được chẩn đoán polyp NMTC trong khi KTBT, với tỉ lệ 7,9%. 92 chu kỳ chuyển phôi trữ thỏa mãn tiêu chuẩn nhận-loại được đưa vào nghiên cứu, trong đó có 18 chu kỳ sau phẫu thuật cắt polyp nội mạc tử cung. Tỷ lệ bhCG dương tính, tỉ lệ thai lâm sàng và tỉ lệ làm tổ của nhóm bệnh nhân chuyển phôi trữ sau khi phẫu thuật cắt polyp NMTC lần lượt là 55,6%; 50% và 26,9%; tương đồng với các nhóm TPTB do các nguyên nhân khác. Không có mối liên quan nào giữa các yếu tố độc lập bao gồm tuổi, BMI, số phôi chuyển, nội mạc tử cung và nguyên nhân đông phôi toàn bộ với tỉ lệ có thai lâm sàng.
Kết luận: Đông phôi toàn bộ, phẫu thuật nội soi buồng cắt polyp nội mạc tử cung sau đó chuyển phôi trữ ở các chu kỳ tiếp theo là một lựa chọn mang lại tỉ lệ có thai phù hợp. Tuy nhiên cần các nghiên cứu tiến cứu với cỡ mẫu lớn được thực hiện để xác thực các phát hiện trong nghiên cứu này.
Analisis Prediksi Masa Manfaat PLTD PT PLN (Persero) Kabupaten Kepulauan Selayar dengan Metode Regresi
Authors: Mulki Abdul Malikil , Suryanto Suryanto , Tandioga Remigius 
Published: May 2021

Abstrak- Dalam penelitian ini diditeliti suatu metode untuk memprediksi masa pakai suatu pembangkit menggunakan prinsip matematis dengan data aktual dari tahun 2013 sampai dengan 2017 yaitu data pemasukan (benefit) yang terdiri dari pemasukan dari penjualan listrik dan subsidi dan biaya (cost) yang terdiri dari bahan bakar, pemeliharaan, gaji pegawai, penyusutan, dan administrasi setiap tahun yang dimodelkan dalam bentuk matriks untuk mendapatkan koefisien-koefisien persamaan regresi kuadratis dengan menganggap tahun sebagai variabel bebas, sedangkan variabel tidak bebas adalah benefitdancost. Hasil regresi benefit dan cost dicari korelasi kedekatan kecocokan data aktual dengan hasil regresi dalam persentase, kemudian dicari titk temu dari hasil regresi benefit dan cost, jika nilai benefit sama dengan nilai cost maka secara finansial tidak menguntungkan, dan tidak merugikan (breaking point), Hasil penelitian menunjukkan bahwa masa pakai keempat unit mesin PLTD Selayar tercapai pada titik pertemuan antara kurva benefit dan kurva cost rata-rata berada pada tahun 2016 dengan masa pakai umur pembangkit 29 tahun mulai dioperasikan sejak tahun 1987, secara teknis mesin tersebut masih bisa dioperasikan setelah tahun 2016 namun secara finansial tidak menguntungkan lagi. l,
EFFECT OF THE SUPPLIER SELECTION ON SUPPLY CHAIN EFFICIENCY IN COUNTY GOVERNMENT OF NANDI
Authors: Naomi Cherono Naomi , Keitany Pauline 
Published: May 2021

Purpose: The main purpose of this study was to evaluate the effect of supplier selection on the supply chain efficiencies in the county Government of Nandi. The study was guided by the following theories: transaction cost theory and the contingency theory. The study employed an explanatory survey which was cross-sectional in time dimension.
Methodology: A proportionate stratified random sampling based on departmental section was utilized. The primary data collection procedure involved a survey where a self–administered questionnaire was used. With reference to content validity, the questionnaire was reviewed by a panel of experts before pilot testing was done. Once the data was cleaned, sorted and entered, it was analysed through the use of descriptive analysis (frequency distribution, means, standard deviation) with the data being presented in tabular and pictorial format. The inferential statistics (multiple regression), will be conducted at 95 per cent confidence level with significance levels of 0.05. The results were displayed using tables.
Findings: The findings of the study indicated that supplier selection practices had positive and significant influence on supply chain efficiency, Kenya (β =0.114; p<0.05. The concluded that supplier selection is the predictor of supply chain efficiency of county government of Nandi. The study recommended that the county government of Nandi other organizations at large should show more commitment in SRM by having systems to monitor and appraise and evaluate performance at a strategic level.
Unique contribution to theory, practice and policy: The study could be replicated in other industry sectors of the economy to build on the body of knowledge of supplier selection on performance of organizations.
El problema del Déficit de Reconocimiento dentro de las instituciones de enseñanza secundaria del Uruguay
Authors: Gambini Marcelo 
Published: May 2021

En este trabajo se propone realizar un estudio sobre el problema del déficit de reconocimiento dentro delas instituciones de Educación Secundaria del Uruguay, a partir de la lectura de Hegel (1805-1806/1984; 2015) y Honneth (2009), bajo el entendido de que es posible comprender el problema del mal funcionamiento de las instituciones de Educación Secundaria como una patología de lo social. En tanto los problemas de estas instituciones remiten a un déficit en la racionalidad que las orienta, ello afecta la gramática de reconocimiento intersubjetivo (docente-estudiante), dando lugar a un déficit de reconocimiento de la autoridad docente y de aquellos estudiantes que no se adecuan a las exigencias institucionales.
BURNING OF FORESTS IN SNNP «BURABAY» AND WAYS TO MINIMIZE IT
Authors: АРХИПОВ Е.В. , НОВОКШОНОВ И.В. , ПАНИН И.А. 
Published: May 2021

Аридизация климата, наблюдающаяся в последние десятилетия, обусловила увеличение опасности возникновения и развития лесных пожаров. Особенно это проявляется в южных районах, где лесные насаждения произрастают на границе со степью в экстремальных для них лесорастительных условиях. Уменьшение количества осадков, повышение летних температур и усиление ветра приводят к ускоренно- му высыханию напочвенных горючих материалов и, как следствие этого, повышают вероятность прихода в лесные массивы степных пожаров, а также перехода низовых лесных пожаров в верховые.
Сосновые насаждения ГНПП «Бурабай» характеризуются повышенной пожарной опасностью. В них велика вероятность перехода низовых пожаров в верховые и создания угрозы населенным пунктам. В целях совершенствования охраны лесов от пожаров проанализированы показатели фактической горимости лесов ГНПП «Бурабай» за период с 2008 по 2019 гг., а также специфика развития указанных пожаров и причины их возникновения. На основе собранных материалов предпринята попытка разработки предложений по совершенствова- нию охраны лесов от пожаров и минимизации послепожарного ущерба.
Climate aridization observed in recent decades has led to an increase in the risk of occurrence and development of forest risk. This is especially evident in the southern regions where forest stands grow on the border with the steppe in extreme for them forest growing conditions. A decrease in the amount of precipitation, an increase in summer temperatures and wind increasing leads to an accelerated drying on soil combustible materials and, as a consequence, increases probability of entering into forests steppe ﬁ res as well as transition of ground forest ﬁ res to crown ones.
Pine stands in SNNP «Burabay» are characterized by an increased ﬁ re hazard. They have a high probability of transition of ground ﬁ res upper ones and creation of a threat to settlement. In order to improve the protection of forests from ﬁ res the indicators of actual rate of forest burning in SNNP «Burabay» for the period 2009 to 2019, as well as speciﬁ c of these ﬁ res development and the causes of their occurrence were analyzed. On the basis of the collected materials an attempt was made to develop proposals for improving the protection of forests from ﬁ res and minimizing ﬁ re hazardous damage.
Prosedur Clearance In Dan Clearance Out Kapal Tanker Milik PT. Pertamina (Persero) Oleh PT. Pertamina Trans Kontinental Cabang Merak Banten Di Pelabuhan Tanjung Gerem Merak Banten
Authors: Mulyawan Eka , Nurwansyah Firman , Diarto Adeng 
Published: May 2021

Tugas dari perusahaan pelayaran, PT. Pertamina Trans Kontinental Cabang Merak Banten yaitu mengurus dokumen Clearance In dan Clearance Out kapal yang akan sandar dan melakukan bongkar/muat barang di pelabuhan Tanjung Gerem. Tujuan penelitian ini adalah untuk mengetahui dan menjelaskan prosedur Clearance In dan Clearance Out kapal tanker di pelabuhan Tanjung Gerem Merak Banten dan untuk mengetahui instansi-instansi terkait dalam operasional keagenan kapal di pelabuhan Tanjung Gerem Merak Banten. Metode yang dilakukan untuk pengumpulan data adalah Metode observasi atau pengamatan, interview atau wawancara, studi pustaka dan dokumentasi. Sebagai Agen pelayaran wajib mengetahui prosedur Clearance In dan Clearance Out Kapal, karena kegiatan tersebut adalah kegiatan inti dari operasional perusahaan pelayaran yang bergerak di bidang keagenan. Dokumen-dokumen kapal tanker yang diperlukan untuk prosedur Clearance In dan Clearance Out diantaranya dokumen returnable (dokumen yang selalu berada diatas kapal tanker atau menyertai kapal tanker), dokumen muat dan instansi-instansi yang terkait dalam proses keagenan di Pelabuhan Tanjung Gerem Merak Banten antara lain : Kantor Kesyahbandaran dan Otoritas Pelabuhan Kelas 1 Banten, Kantor Bea dan Cukai / Kepabeanan, PT.Pelabuhan Indonesia II Cabang Merak, Kantor Kesehatan Pelabuhan Kelas 1 Banten (Health And Quarantine).
Peranan Perusahaan Pelayaran Dalam Rangka Kelancaraan Pengurusan Perpanjangan Sertifikat Kapal Di Pelabuhan Merak Banten
Authors: Fatah Abdul , Sukiman Sukiman , Ramdhani Fathurachman Egi 
Published: May 2021

Vessel restoration and transfer are carried out in several activities that have been determined by the agency together with the ship's management and must be submitted to the ship. In this case, PT. Menara Lintas Samudera Makmur as support in maritime development in terms of certificates, which are shipping legality documents such as National Identity Letters, Measuring Letters, Eligible Certificates, Embossed Hull Certificates, Lists of Ships, Radio Safety Certificates, Transportation Vessels Safety Certificates. To receive this data, the authors make a qualitative method by direct observation, then interviews with relevant parties, and the literature to complete the receive. Then the procedure for terminating the validity of the ship's certificate and its accompanying documents. Ship \ Harbor Extension Office or Port Authority and Port Authority Office, with functions. So supporting activities at the port is very important, in order to smooth the management of ship certificates, the process of managing ship certificates, then PT. Menara Lintas Samudera Makmur must establish good cooperation with the KSOP Office with the Inspector of the Sea.
Keywords : Certificate, Legality of shipping operations, Marine Inspector
ABSTRAKPenyandaran dan keberangkatan kapal dilakukan ada beberapa kegiatan yang telah di tetapkan oleh pihak keagenan bersama dengan pihak pengelola dermaga dan harus disampaikan kepada pihak kapal. Dalam hal ini PT. Menara Lintas Samudera Makmur sebagai penunjang dalam pembangunan kemaritiman dalam hal sertifikat, yang merupakan dokumen legalitas oprasional pelayaran seperti Surat Tanda Kebangsaan, Surat Ukur, Sertifikat Layak, Sertifikat Lambung Timbul, Daftar Anak Buah Kapal, Sertifikat Keamanan Radio, Sertifikat Keselamatan Kapal Barang. Untuk memperoleh data tersebut penulis melakukan metode kualitatif dengan cara Observasi atau pengamatan langsung, kemudian wawancara dengan pihak-pihak yang terkait, dan Kepustakaan untuk melengkapi penulisan. Kemudian prosedur pengurusan perpanjangan sertifikat kapal yang masa berlakunya habis serta dokumen yang menyertainya. Instansi pengurusan perpanjangan sertifikat kapal atau Kantor Kesyahbandaran dan Otoritas Pelabuhan, dengan fungsi. Maka penunjang kegiatan di pelabuhan peranan keagenan sangat penting, dalam rangka kelancaran pengurusan perpanjangan sertifikat kapal, Proses pengurusan perpanjangan sertifikat kapal, maka PT. Menara Lintas Samudera Makmur harus menjalin kerja sama yang baik dengan Kantor KSOP terutama dengan pihak Marine Inspector.
Kata Kunci : Sertifikat, Legalitas operasional pelayaran, Marine Inspector
Knowledge Production at the Borderline Territory
Authors: Prpić Lovorka 
Published: May 2021

Learning, like creation, takes place in relation. Life happens in the interval of matter. In the magnetic field — space-time interval of change — a new form of life is created. Intention is to explore the incentive for knowledge production dynamics in education of architects through a lens of relational phenomena. Phenomenology of the inside-outside relation in spatial perception of architecture is compared to the one in psychoanalytical dynamics.
In a culture of interconnectedness and change, architectural education is an experimental process. School-laboratory is an organized transient community of self-reflective individuals engaged within an active discovery-oriented atmosphere. Pedagogical approach is a nonhierarchical dialogue, individualized and emancipatory. Method can foster collaboration and/or induce instability; it sustains conflict, failure, and crisis. Reflective practice stimulates personality development in the process of individuation and actualization of potentials. Transformative encounter is an open process, an exchangeable relationship.
Sistem Informasi Persediaan Barang pada CV. Anak Teladan
Authors: Fenny Hidha Rahmawati  , Esthi Adityarini  
Published: May 2021

Abstract— CV. Anak Teladan is a company engaged in the distribution of books, and supporting tools for kindergartens. As for the problems that occur in the current system that is for processing data on incoming goods, data on outgoing goods and stock of goods is still recorded in paper or book in accordance with receipts and travel documents from suppliers that contain several many incoming and outgoing goods to be sent to the customer. Data collection of inventory items is only recorded on a piece of paper and then copied back into the next book the office section that will copy into the computer, sometimes has difficulty in getting stock information, so the information provided is often not in accordance with the availability of the available items. The purpose of this study is to create a system of inventory information, which can manage incoming and outgoing goods and stock items. The information system that has been produced by this design can manage data entry and exit goods, inventory data.
Intisari — CV. Anak Teladan merupakan perusahaan yang bergerak dibidiang distributor buku, dan alat penunjang untuk Taman Kanak-kanak. Adapun masalah yang terjadi pada sistem yang telah berjalan saat ini yaitu untuk pengolahan data barang masuk, data barang keluar dan stok barang masih di catat ke dalam kertas atau buku sesuai dengan kwitansi dan surat jalan dari supplier yang berisi beberapa banyak barang masuk dan keluar untuk dikirim ke pelanggan. Pendataan persediaan stok barang hanya dicatat di selembar kertas kemudian di salin kembali ke dalam buku berikutnya bagian kantor yang akan menyalin ke dalam komputer, terkadang mengalami kesulitan dalam mendapatkan informasi stok barang, sehingga informasiyang diberikan sering tidak sesuai dengan kertersediaan barang yang ada. Tujuan penelitian ini adalah membuat sistem informasi persedian barang, yang dapat mengelola barang masuk dan keluar serta stok barang. Sistem informasi yang telah dihasilkan perancangan ini dapat mengelola data barang masuk dan keluar, serta data stok barang.
The effect of tactical periodisation on technical effectiveness and intermittent resistance of university tennis players
Authors: Polanco Bustos Diego , Mariño Landazábal Nelson 
Published: May 2021

In tennis, the high demand and unpredictable duration of matches lead us to examine which are the most efficient methodologies for the development of athletes’ endurance. The objective of this study was to measure the evolution of technical effectiveness and intermittent endurance in tennis, through the comparison between the tactical periodization method (based on the game) and the ATR (traditional periodisation of accumulation, transformation and realization - based on physical abilities) in university players to establish the difference between methods. 16 university tennis players participated in this study; they were then divided into two groups. Both training methods were applied to each group in a different order, measuring the intermittent resistance after each intervention with an intermittent recovery yo-yo test of level-1 and the specific resistance and technical effectiveness by means of the set-test. The results show that the tactical periodization has a positive effect on the technical effectiveness, achieving a greater number of successful strokes. This occurs without a lower performance in the intermittent resistance, whereas the ATR method achieves a greater ability to travel greater distances in situations decontextualized from the game. The results give insight to physical trainers on how training of resistance could be developed in situations based on the game such as in the tactical periodization method, without neglecting the specific resistance which primarily occurs best in training of isolated physical capacities such as the ATR method.