bluuebunny/crossref_metadata_2025 huggingface dataset:
The Role of the HLA Class I α2 Helix in Determining Ligand Hierarchy for the Killer Cell Ig-like Receptor 3DL1
Authors: Saunders Philippa M , MacLachlan Bruce J , Widjaja Jacqueline , Wong Shu Cheng , Oates Clare V L , Rossjohn Jamie , Vivian Julian P , Brooks Andrew G
Published: January 2021

HLA class I molecules that represent ligands for the inhibitory killer cell Ig-like receptor (KIR) 3DL1 found on NK cells are categorically defined as those HLA-A and HLA-B allotypes containing the Bw4 motif, yet KIR3DL1 demonstrates hierarchical recognition of these HLA-Bw4 ligands. To better understand the molecular basis underpinning differential KIR3DL1 recognition, the HLA-ABw4 family of allotypes were investigated. Transfected human 721.221 cells expressing HLA-A*32:01 strongly inhibited primary human KIR3DL1+ NK cells, whereas HLA-A*24:02 and HLA-A*23:01 displayed intermediate potency and HLA-A*25:01 failed to inhibit activation of KIR3DL1+ NK cells. Structural studies demonstrated that recognition of HLA-A*24:02 by KIR3DL1 used identical contacts as the potent HLA-B*57:01 ligand. Namely, the D1–D2 domains of KIR3DL1 were placed over the α1 helix and α2 helix of the HLA-A*24:02 binding cleft, respectively, whereas the D0 domain contacted the side of the HLA-A*24:02 molecule. Nevertheless, functional analyses showed KIR3DL1 recognition of HLA-A*24:02 was more sensitive to substitutions within the α2 helix of HLA-A*24:02, including residues Ile142 and Lys144. Furthermore, the presence of Thr149 in the α2 helix of HLA-A*25:01 abrogated KIR3DL1+ NK inhibition. Together, these data demonstrate a role for the HLA class I α2 helix in determining the hierarchy of KIR3DL1 ligands. Thus, recognition of HLA class I is dependent on a complex interplay between the peptide repertoire, polymorphisms within and proximal to the Bw4 motif, and the α2 helix. Collectively, the data furthers our understanding of KIR3DL1 ligands and will inform genetic association and immunogenetics studies examining the role of KIR3DL1 in disease settings.
Upper cervical spinal bronchogenic cyst: A rare lesion at an exceptional location
Authors: Patel Viral , Desai Shreya , Thakkar Vishal , Chaudhari Sanjay
Published: January 2021

An intraspinal bronchogenic cyst is a rare but important cause of compressive cord myelopathy, commonly seen in the cervicothoracic spine. We report a case of a 30-year-old female, presented with complaints of neck pain and progressive weakness of the extremities. The magnetic resonance imaging of the cervical spine revealed an intradural extramedullary, well-defined, multiloculated, cystic lesion in the upper cervical canal extending from the C2 to C5 vertebral levels. To our knowledge, only 11 cases of spinal bronchogenic cysts have been reported in the literature so far. We discuss the rare location of this unusual lesion, possible embryological reasons, and the overall surgical outcome.
Microwire navigation and microcatheter positioning by balloon manipulation for the treatment of intracranial aneurysms: A pilot study
Authors: Binboga Ali Burak , Onay Mehmet , Altay Cetin Murat
Published: January 2021

Background and Objective: An intracranial aneurysm (IA) is a life-threatening condition and endovascular treatment (EVT) is a demanding procedure, especially in IAs with an unfavorable anatomy. The aim of this study was to investigate the safety and efficacy of balloon-assisted microwire navigation and microcatheter positioning in the EVT of IAs with challenging anatomies. Materials and Methods: This retrospective study included patients that underwent balloon-assisted microwire navigation and microcatheter positioning in the EVT of IAs between September 2016 and January 2019. All EVT procedures and data collection were performed by the same two neurointerventional radiologists. Technical success and complication rates, safety, and efficiency of the balloon manipulation method were evaluated. Statistical software was used to analyze the basic descriptive data of the patients and aneurysms. Results: This study included 14 patients. The microwire navigation of the target artery with balloon manipulation was used in 4 aneurysms of 4 patients. Microcatheter positioning with balloon manipulation was used in 10 aneurysms of 10 patients. There was no complication caused by the balloon manipulation technique. The technical success rate was 100’. Conclusion: In the EVT of IAs with challenging anatomies, the presented technique is a safe and effective option without additional complications, especially in the target artery with an acute angle and in small aneurysms.
Introduction to Maintenance, Repair and Overhaul of Aircraft, Engines and Components
Authors: Weerasekera Shevantha
Published: January 2021

Introduction to Maintenance, Repair and Overhaul of Aircraft, Engines and Components brings together the basic aspects of a fundamentally important part of the aerospace industry, the one that supports the global technical efforts to keep passenger and cargo planes flying reliably and safely. Over time, aircraft components and structural parts are subject to environmental effects, such as corrosion and other types of material deterioration, wear and fatigue. Such parts could fail in service and affect the safe operation of the aircraft if the degradation were not detected and addressed in time. Regular planned maintenance supports the current and future value of the aircraft by minimizing the physical decline of the aircraft and engines throughout its life. Introduction to Maintenance, Repair and Overhaul of Aircraft, Engines and Components was written by the industry veteran, Shevantha K. Weerasekera, an aerospace engineer with 20+ years of aircraft maintenance experience, who currently leads the engineering team of a major technical enterprise in the field.
Experimental investigation on the production of bio-oil from maize straw at a pilot scale
Authors: Rathore N. S. , Sanjay Paul Arjun , Panwar N. L.
Published: January 2021

The production of biofuel from agricultural crop residue via fast pyrolysis is becoming a popular option. It can help to build a robust renewable fuel market and ensure environmental sustainability. In this study, the widely available maize straw was used for the production of bio-oil in a fluidized bed reactor at a pilot scale. The effect of pyrolysis parameters such as temperature, biomass particle size, and carrier gas flow rate on the production of bio-oil, char, and syngas was investigated. The maximum bio-oil yield of 44.6 wt.% was achieved at a pyrolysis temperature of 500℃. The physicochemical properties of bio-oil were determined, and the heating value was found to be 18.5 MJ/kg. Furthermore, the chemical composition of maize straw bio-oil was analyzed by GC-MS and FTIR. The compounds such as phenol (22.83%), carboxylic acids (27.36%), ketone (19.14%) alcohols (2.09%), esters, furfural, hydrocarbon and aromatic compounds, etc. were identified in the bio-oil. The cost analysis of the developed system showed that the cost of production of bio-oil from maize straw was 0.47 US$/L and the calculated payback period was 1.47 year.
Recent advances in heighten sulfur resistance of SCR catalysts: A review
Authors: Zhao Ling , Zhang Yu , Kang Mengdi
Published: January 2021

NOx removal by selective catalytic reduction (SCR) technology is a research hotspot in the field of environmental catalysis, and this method is dominated by catalysts. However, denitrification catalyst is easy to be polluted by the presence of SO2, which seriously restricts its practical industrial application. This review focuses on the latest domestic and foreign research results and advancement in improving sulfur resistance of deNOx catalysts, reveals the sulfur poisoning mechanism and regeneration process, as well as introduces the positive role of quantum chemistry in the field of sulfur resistance. In view of the questions set forth in this review, the future development direction of deNOx catalysts is prospected, which provides valuable scientific guidance for the design and development of efficient and practical sulfur resistant deNOx catalysts.
CÁC NHÂN TỐ ẢNH HƯỞNG ĐẾN LÒNG TRUNG THÀNH CỦA NHÂN VIÊN TẠI CÔNG TY GOLDEN COMMUNICATION GROUP
Authors: MINH HUỲNH QUANG , HIỀN LƯỜNG THỊ THU
Published: January 2021

Nghiên cứu này kết hợp phương pháp nghiên cứu định tính và nghiên cứu định lượng. Bảy (07) nhân tố được xác định trong mô hình nghiên cứu trong đó có sáu (06) nhân tố độc lập gồm: (1) Tiền lương, (2) Môi trường làm việc, (3) Phúc lợi, (4) Đồng nghiệp, (5) Khen thưởng, (6) Cơ hội đào tạo và thăng tiến và một (01) nhân tố phụ thuộc là lòng trung thành của nhân viên công ty. Với số lượng 170 bảng khảo sát hợp lệ cho nghiên cứu định lượng và kết quả phân tích hồi quy bội cho thấy có bốn (04) nhân tố tác động thuận chiều đến lòng trung thành của nhân viên theo mức độ giảm dần như sau: (1) Cơ hội đào tạo và thăng tiến, (2) Môi trường làm việc, (3) Khen thưởng, và (4) Tiền lương. Kết quả nghiên cứu này giúp công ty làm căn cứ xem xét có chính sách phù hợp cho việc nâng cao lòng trung thành của nhân viên công ty.
ĐÁNH GIÁ RỦI RO TRONG HOẠT ĐỘNG CHUỖI CUNG ỨNG: TRƯỜNG HỢP CÔNG TY TNHH SYNTHOMER VIỆT NAM
Authors: VINH NGUYỄN QUANG , HUYỀN MAI THỊ KIM
Published: January 2021

Rủi ro có thể xảy ra ở một điểm nào đó trong chuỗi cung ứng sẽ gây ảnh hưởng lớn đến doanh nghiệp nếu như doanh nghiệp không thể kiểm soát tốt. Công ty TNHH Synthomer Việt Nam hiện cũng đang rất quan tâm đến vấn đề này trong quản trị chuỗi cung ứng của mình. Đánh giá các rủi ro tiềm năng cùng các tác động để từ đó đưa ra một số hàm ý quản trị nhằm giảm thiểu, kiểm soát và xử lý tốt các rủi ro ưu tiên là mục tiêu của nghiên cứu này. Kỹ thuật phân tích tác động và hình thức sai lỗi FMEA được xử dụng kết hợp với phỏng vấn 10 chuyên gia đưa đến kết quả 8 rủi ro được xác định cần phải được ưu tiên xử lý trước so với 22 rủi ro còn lại kèm theo các hàm ý quản trị tương ứng giúp Synthomer Việt Nam cải thiện hiệu quả chuỗi cung ứng của Công ty.
Analisis Hubungan Budaya Sekolah Terhadap Pembinaan Disiplin Siswa Menggunakan Metode Likert di SPSS (Studi Kasus di SMPN 4 Pariaman)
Authors: Novebri Novebri
Published: January 2021

Abstrak

Objektif. Penelitian ini bertujuan untuk mengetahui hubungan antara budaya sekolah terhadap pembinaan disiplin siswa di SMPN 4 Pariaman, yang meliputi: 1) Nilai, dan 2) kepercayaan, dimana disiplin siswa dapat dilihat dari 1) tata tertib, 2) keteladanan, 3) pemberian bimbingan, 4) pengendalian perilaku dan 5) pengawasan. Populasi dalam penelitian ini adalah semua siswa di kelas VIII di SMPN 4 Pariaman yang berjumlah 111 orang. Sampel berjumlah 30 orang dimana diambil 25% dari populasi dengan menggunakan rumus dari Arikunto.

Material and Metode. Penelitian ini adalah penelitian kuantitatif yang bersifat korelasi, yang mengkaji hubungan antara budaya sekolah dengan disiplin siswa. Pengumpulan data dilakukan dengan angket, menggunakan skala Likert, validitas dan reliabilitasnya diuji dengan SPSS versi 20.

Hasil. Hasil penelitian menunjukkan bahwa budaya sekolah berhubungan dengan pembinaan disiplin siswa, dimana budaya sekolah sebesar 78,03% dan pembinaan disiplin siswa sebesar 24,47%.

Kesimpulan. Dapat disimpulkan bahwa budaya sekolah berhubungan dengan pembinaan disiplin siswa di SMPN 4 Pariaman. Semakin baik budaya sekolah, maka semakin baik pula tingkat disiplin siswa.

Abstrack

Objective. This study aims to know the relationship school culture to the student's development discipline in Junior Hight School 4 in Pariaman City views of 1) values and 2) confidence, while the student's development discipline can be seen from 1) school regulation, 2) the perfection, 3) guidance giving, 4) control behaviors and 5) controlling. The study population was all students in the second grade at Junior High School 4 in Pariaman City, the number of 111 people. The number of samples is 30 people were taken 25 percent from the population by using the Arikunto technique.

Materials and Methods. This research is quantitative research, which examines the correlation between the school's culture to students' discipline. The data collection tool was a questionnaire with Likert Scale models that have proven validity and reliability with SPSS version 20.

Results. The results showed that the school culture relationship with students' development discipline in both categories with a score of school culture (78.03%) and student development discipline (24, 47%).

Conclusion. The school culture has a relationship with the student's development discipline in Junior Hight School 4 in Pariaman City.
THE IMPACT OF COVID-19 ON LABOUR MARKET IN NORTH MACEDONIA
Authors: Zulfiu Alili Merita
Published: January 2021

An initial assessment of the impact of COVID-19 on the North Macedonian labour market is widely anticipated that will be severe, pushing thousands of people into unemployment, underemployment and working poverty. This paper aims to assess the impact of the COVID-19 outbreak on labour market by analysing the most affected sectors and government measured aimed to prevent job losses. Many small and medium businesses have already closed their operations or decreased the number of employees. The most affected industries due to the outbreak of the COVID-19 are the tourism industry and export-oriented industries, including the textile sector. To mitigate the consequences of COVID-19 the Government of North Macedonia has adopted measures for support of the firms which aim to keep jobs, maintain social stability, and help the citizens affected by the crisis. Specific local labour market characteristics should be considered when specifying eligibility criteria and undertaking crisis response measures.
IMPACT OF BOARD CHARACTERISTICS ON FIRM PERFORMANCE: DYNAMIC PANEL EVIDENCE OF THE INSURANCE INDUSTRY IN THE REPUBLIC OF NORTH MACEDONIA
Authors: Kamenjarska Tanja , Ivanovski Igor
Published: January 2021

Corporate governance is a crucial mechanism for the organizations’ actions to maintain market successful adequate and targeted policies and long-term strategies that ensure the maximization of shareholders’ benefits. The board of directors is appointed by organizations’ shareholders and its main role is to be responsible and accountable and to ensure enforcement of the top management acts concerning the fulfillment of the shareholder’s interests. For this to be achieved, it is important for the board to be efficient, effective, and focused on protecting the organization and shareholder’s interests. Good corporate governance and more specifically, board characteristics play a central role in companies’ management, coordination, and control mechanisms. The paper analyses various theoretical and empirical findings regarding the prominence of various board characteristics within companies and particularly evaluates the impact of board characteristics on the financial performance of listed companies in the insurance industry in the Republic of North Macedonia. The financial ratio ROA is used as a proxy and as a variable for firm performance while the board experience, CEO duality, board size, board composition, and gender diversity are set to be as independent variables. Based on the variables related to board characteristics, hypotheses are developed and their impact upon firm performance is examined with the use of Generalized Methods of Moments (GMM), a pairwise correlation matrix, as well as with multicollinearity VIF test. In that direction, this paper aims to determine the level of effectiveness of current governance mechanisms and based on the results, propose measures and actions for successfully handling agency costs while maximizing governance capability and performance in the insurance sector in the Republic of North Macedonia.
Book review of "University Administration"
Authors: Lang Daniel Wallace
Published: January 2021

Eliot, Charles W. (1908). University Administration. Boston: Houghton-Mifflin, The Riverside Press. Pages: 296.n/a. Reprints: Bushnell Press (2008) Price: $25.95USD; Bibliolife (2009) Price: $40.85USD; Nabu Press (2010)Price: $42.45 CDN; Read Books (2015) Price: $38.56CDN; Palala Press (2015) Price: $34.95USD; WentworthPress (2016) Price: $26.60USD.
SEARCH ENGINES USING EVOLUTIONARY ALGORITHMS
Authors: RAVI SOWMYA , GANESAN NEERAJA , RAJU VANDITA
Published: January 2021

A subset of AI is, evolutionary algorithm (EA) which involves evolutionary computation, a generic populationbased meta heuristic optimization algorithm. An EA uses some mechanisms inspired by biological evolution: reproduction, mutation, recombination, and selection. A genetic algorithm (GA) is a search technique used in computing to find exact or approximate solutions to optimization and search problems. Working of a search engine deals with searching for the indexed pages and referring to the related pages within a very short span of. Search engines commonly work through indexing. The paper deals with how a search engine works and how evolutionary algorithms can be used to develop a search engine that feeds on previous user requests to retrieve "alternative" documents that may not be returned by more conventional search engines.
HERMITIAN SYMMETRY BASED FIBER NON-LINEARITY COMPENSATION IN OPTICAL OFDM NETWORKS
Authors: P KAMALA KANNAN , B GURU VIGNESH , A INIYAN P , T ILAVARASAN
Published: January 2021

Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique which is now used in most new and emerging broadband wired and wireless communication systems such as standard 802.11a/b/g/n, Digital Video Broad casting Television (DVB-TV), and Long Term Evolution (LTE) in the next mobile generation, due to its capacity in solving the problems of Inter-Symbol Interference (ISI) caused by the effects of the dispersive channel. Very recently researches focus on applying OFDM technology in optical fiber communication systems. Optical OFDM is well suited for high speed transmission systems with high spectral efficiency and attracted significant attention from the optical communication community. One of the major issues that degrade the performance of optical OFDM networks is its fiber non-linearity. Fiber non-linearities represent the fundamental limiting mechanisms to the amount of data that can be transmitted on a single optical fiber. Non-linear effects arise as optical fiber data rates, transmission lengths, number of wavelengths, and optical power level increases. Therefore, the effect of non-linearity in high data rate optical networks needs to be controlled to enhance link performances. In this paper, a nonlinearity compensation technique (Hermitian Symmetry) is implemented to improve the performance of OFDM based optical networks. This would provide high spectral efficiency, low ISI and very good Bit Error Rate (BER) performances without increasing the complexity of the network. The optical OFDM transmission system with fiber non-linearity compensation is simulated using Virtual Photonics Integrated (VPI) software.
A TOOL FOR EFFECTIVE DETECTION OF FRAUD IN CREDIT CARD SYSTEM
Authors: VATS SATVIK , DUBEY SURYA KANT , PANDEY NAVEEN KUMAR
Published: January 2021

Due to the rise and rapid growth of E-Commerce, use of credit cards for online purchases has dramatically increased and it caused an explosion in the credit card fraud. Fraud is one of the major ethical issues in the credit card industry. As credit card becomes the most popular mode of payment for both online as well as regular purchase, cases of fraud associated with it are also rising. In real life, fraudulent transactions are scattered with genuine transactions and simple pattern matching techniques are not often sufficient to detect those frauds accurately. Implementation of efficient fraud detection systems has thus become imperative for all credit card issuing banks to minimize their losses. Many modern techniques based on Artificial Intelligence, Data mining, Fuzzy logic, Machine learning, Sequence Alignment, Genetic Programming etc., has evolved in detecting various credit card fraudulent transactions.
ENTITY EXTRACTION USING STATISTICAL METHODS USING INTERACTIVE KNOWLEDGE MINING FRAMEWORK
Authors: AHAMED SHAIK MUNEEB , AHMAD SD.AFZAL , BABU P.
Published: January 2021

There are various kinds of valuable semantic information about real-world entities embedded in web pages and databases. Extracting and integrating these entity information from the Web is of great significance. Comparing to traditional information extraction problems, web entity extraction needs to solve several new challenges to fully take advantage of the unique characteristic of the Web. In this paper, we introduce our recent work on statistical extraction of structured entities, named entities, entity facts and relations from Web. We also briefly introduce iKnoweb, an interactive knowledge mining framework for entity information integration. We will use two novel web applications, Microsoft Academic Search (aka Libra) and EntityCube, as working examples.
DYNAMICS OF AN UMBILICAL CABLE FOR UNDERGROUND BORE-WELL APPLICATIONS
Authors: SANKAR KANNAN , V.K JAYA KUMAR.
Published: January 2021

A general model for an umbilical cable for underground bore-well applications is considered. The response of one-degree-of-freedom, nonlinear system under external excitation forces and the effect of the parameters 􀟱2, β and f on the excited system are investigated. Variation of the parameter 􀟱2 leads to multi-valued amplitudes and hence to jump phenomena. The simulation results are achieved using MATLAB 7.12.0 (R2011a) Simulink.
MOBILE ROBOT SELF-PLANNING AND NAVIGATION BASED ON ARTIFICIAL LANDMARK LOCALIZATION METHOD AND BINOCULAR STEREO VISION
Authors: RAO T. VENKATESWARA , RAO M. VEERA VENKATARAMANA , NARASAIAH P. V.
Published: January 2021

This paper describes design of artificial landmark based on colour model used for Self-planning in unstructured environment to a robot for its movement. This method provides less error in estimation when compared to existing methods. This project is an investigation into building a system which visually detects artificial landmarks to determine the landmarks within a location, decipher their position within that location and track the landmark throughout the location using Binocular stereo vision.
DESIGN AND IMPLEMENTATION OF ASYNCHRONOUS FIR FILTER
Authors: HIMABINDU N. , DESHPANDE ROHINI
Published: January 2021

This paper presents the architecture of a micropipeline asynchronous digital signal processing chain coupled to non-uniformly sampled data in time. Non-uniform sampling has been proven to be a better scheme than the uniform sampling to sample low activity signals. With such signals, it generates fewer samples, which means less data to process and lower power consumption. In addition, it is well-known that asynchronous logic is a low power technology. We focus on a Finite Impulse Response filter (FIR) applied to this non-uniform sampled signal obtained from an asynchronous analog to digital converter (A-ADC). The FIR filter blocks are implemented using verilog code.
LABVIEW IMPLEMENTATION OF CIGARETTE FILTER QUALITY CHECK USING FUZZY LOGIC
Authors: SANTHOSH K V. , MEHARUNISA S P.
Published: January 2021

A cigarette filter has the purpose of reducing the amount of smoke, tar, and fine particles inhaled during the combustion of a cigarette. Filters also reduce the harshness of the smoke (Nicotine) and keep tobacco flakes out of the smoker's mouth. It’s very important to maintain the quality of the cigarette filter so as to reduce the hazardous effect posing on human body. This paper aims at implementation of a automated system used to check the quality of the cigarette filter using fuzzy logic algorithms. The results obtained by the proposed system indicate that the system has fulfilled its objective of checking the quality of cigarette filter. The proposed system plays a vital role in the social being of human since its impractical to make smokers quit smoking. At least this system reduces the ill effects of smoking.
AUDIO VIDEO SYNCHRONIZATION USING BITSTREAM SYNTAX
Authors: NAYAK KHYAMADITA , K V MEENA
Published: January 2021

This paper has proposal to develop audio-video synchronization in the bit-stream syntax using the Slice type and Macro-Block usage. The Media file like MP4, MOV and M4Vcontainer formats consists of both Audio and Video packed as tracks. The Video is encoded in H.264 format while Audio is encoded in AAC formats. There is a common way to achieve synchronization by looking into the type of Slice and the type of MB. This can be achieved by scanning across all the atoms present within the Media data. Time synchronization can be achieved by taking input from the Sample to Time atoms and feeding the data into Auxiliary units. The Slice type plays important role for synchronization as the decode order and display order for Video are different and sufficient time is taken to decode the video based on Profile, Level, type and number of Macroblocks for High profile. So the synchronization can be achieved for a Program stream or a Digital storage medium playback by synchronizing the formats based on type of slice information.
Educação Contextualizada e Desfiles Escolares na Festa do Colono de Maniçoba: Uma Pedagogia Alternativa
Authors: Santos Micael , Barros Edonilce
Published: January 2021

Este artigo analisa um movimento da cultura escolar que acontece na Festa do Colono do Perímetro Irrigado de Maniçoba, distrito de Juazeiro, na Bahia, Semiárido Brasileiro, que são os Desfiles Escolares. Esses desfiles nasceram com o intuito de homenagear aos colonos da referida comunidade pelo Dia do Agricultor. Os desfiles são compreendidos como uma prática relacionada à educação contextualizada, aqui considerada como uma “pedagogia alternativa”. O evento cultural, no contexto escolar, apresenta-se como um tipo de educação que faz sentido, partindo do anuncio, da denúncia e mesmo do consumo midiático. Observa-se que, no período de 40 anos de realização dos Desfiles Escolares na Festa do Colono, houve um processo de ressignificação dos dois eventos, com o desaparecimento de alguns elementos dos desfiles, como também da festa, mas houve o surgimento de novos ícones e signos. Os desfiles mobilizam a percepção cognitiva dos professores e das professoras, assim como dos alunos e alunas que atribuem sentido aos personagens que criam e interpretam sejam eles tradicionais, sejam os contemporâneos. Na feitura das alegorias observa-se aspectos do contexto tanto local como global. Na avenida as alunas e os alunos compartilham os saberes apreendidos nos processos pedagógicos de preparação do evento com toda comunidade. O espetáculo dos desfies não está apenas na materialidade das alegorias e nas performances apresentadas, mas na subjetivação e singularidades das aprendizagens. São saberes contextualizados que podem ser associados à uma pedagogia alternativa.
Pedagogias contemporâneas: é possível implementar práticas similares à escola da ponte em pequenos projetos em sala de aula?
Authors: Aguiar Aline , Aguiar Vivian , Diniz Renata
Published: January 2021

O presente artigo tem como objetivo mostrar em que medida novas possibilidades de ampliação e aprimoramento dos processos pedagógicos no ensino e aprendizagem da matemática são meios de se atingir melhores níveis de aprendizagem do aluno. A pesquisa foi feita em uma turma do primeiro ano do Ensino Médio de uma escola da região metropolitana de Belo Horizonte, a partir da experiência obtida pela Escola da Ponte e o Projeto Âncora. A demanda do estudo se deu pelo interesse dos professores de matemática em implementar novas práticas pedagógicas que favorecessem uma melhor aprendizagem dos conteúdos da disciplina, rompendo com modelos tradicionais de ensino e estimulando a autonomia do aluno no momento de aprender. Para tanto, utilizou-se o referencial teórico e metodológico da Escola da Ponte e do Modelo Âncora. Este relato de experiência conclui que é possível implementar novas práticas pedagógicas em pequenos projetos em sala de aula pela introdução de situações-problemas relacionadas com questões cotidianas, gerando uma ótima oportunidade para iniciar e desenvolver os conteúdos escolares da matemática e colocar o aluno como responsável pela construção do seu próprio conhecimento, com autonomia e liberdade para fazer, errar e desenvolver as atividades propostas.
Estresse ocupacional de docentes do ensino médio de instituições públicas
Authors: Moreira Cláudia , Honório Luiz
Published: January 2021

O presente artigo procurou descrever e analisar os níveis de estresse ocupacional e suas manifestações nos docentes de ensino médio de escolas públicas no município de Viçosa – MG e identificar os fatores de estresse no trabalho, os principais sintomas e as estratégias de como lidar com o estresse ocupacional. Tratou-se de pesquisa descritiva, explicativa, com abordagem quantitativa e utilização da técnica survey com aplicação de questionário estruturado. As escalas utilizadas basearam-se no Modelo de Cooper, Sloan e Williams (1988), Honório (1998) e Zille (2005). Os resultados apresentaram maior significância quanto aos fatores de pressão no trabalho, na variável estrutura e no clima organizacional, e no desenvolvimento na carreira. Também evidenciaram maior predominância dos sintomas mentais sobre os físicos, como dores nos músculos do pescoço e dos ombros. Quanto às estratégias de combate ao estresse, as mais utilizadas pelos pesquisados foram o planejamento das atividades, o gozo de férias regulares e as conversas com os amigos. Acerca dos resultados obtidos, observou-se que os professores das instituições públicas estaduais apresentam maior fator de pressão comparados com os das escolas públicas federais e que as mulheres possuem maiores sintomas físicos e mentais que os homens.
Binding indocyanine green to human serum albumin potentially enhances the detection of sentinel lymph nodes. An initial step for facilitating the detection of first-station nodes in penile
and other urological cancers
Authors: Markuszewski Marcin , Buszewska-Forajta Magdalena , Artymowicz Małgorzata , Połom Wojciech , Roslan Marek , Markuszewski Michał
Published: January 2021

Introduction

Surgical oncology strives to remove the primary cancer tumor together with its local lymphatic tissue. One of the techniques improving the staging of lymph nodes is sentinel node biopsy. The most common agent used in SNB is indocyanine green (ICG). Indocyanine green is characterized by its high affinity for human serum albumin (HSA). In practice, the visualization of the sentinel node is enhanced by attaching a relatively large carrier to the ICG molecule. The aim of this study was to investigate whether the covalent linking of ICG to a nanocolloid would extend the time of detection of the dye as it binds to HSA, assessed by fluorescence measurements in vitro.

Material and methods

The influence of the molar concentration of ICG on its ability to form a complex with HSA was investigated. The dye luminescence was measured, with an increasing amount of dye in the presence of a constant concentration of HSA. The stability of the ICG:HSA complex was also investigated.

Results

The binding of ICG and human protein in a solution ratio of 3 : 1 made it possible to detect the ICG luminescence with better and prolonged visibility. In the case of the two lowest ratios, complex formation was not observed. The use of ICG bound to a nanocolloid based on human serum albumin increases the luminescence of the HSA:ICG complex up to 98%.

Conclusions

Properly selected proportions of human albumin protein and ICH allowed higher and longer luminescence to be achieved. Nevertheless, further studies are necessary to establish the optimal concentration ratio.
Evaluation of methods of surfactant administration in the delivery suite?
Authors: Ambulkar Hemant , Dassios Theodore , Greenough Anne
Published: January 2021

Surfactant administered in the delivery suite might prevent or reduce the severity of subsequent respiratory distress syndrome. This review describes the evidence for surfactant delivery methods with relationship to their relevance in the delivery suite. The techniques include delivery using a thin catheter with the first breath, by the intubation-surfactant extubation procedure, less invasive surfactant administration (LISA) technique, using a laryngeal mask airway (LMA), or by nebulisation. There have been few randomised trials that have evaluated outcomes using these techniques in the delivery suite, and these were early trials. Currently, practitioners favour use of nasal continuous positive airway pressure with early rescue surfactant. Whether prophylactic surfactant given by the LISA technique or other techniques, such as via a LMA in the delivery suite, is more beneficial merits testing. This will require appropriately designed randomised trials with long-term outcomes.
Spectroscopic Investigation of Nebular Gas (SING): general objectives and preliminary optical layout
Authors: Сачков М.Е. , Чандра Б. , Мурти Д. , Шмагин В.Е. , Прабха Ш. , Пракаш А. , Наир Б.Г. , Сафонова М.В. , Рай Р. , Мохан Р.
Published: January 2021

Ультрафиолетовый спектральный диапазон (ближний УФ, 180-300 нм; дальний УФ, 115-180 нм) крайне востребован астрофизиками. Успешные космические проекты, такие как IUE, HST, GALEX, ASTROCAT/UVIT и другие, дали ученым совершенно новые данные для астрофизических исследований. Прямые УФ-изображения неба позволяют проследить морфологию протяженных объектов (планетарных туманностей, остатков сверхновых и т.д.), но эти данные дают очень ограниченную информацию о понимании физических условий (температура, плотность, поле излучения). Спектроскопические наблюдения позволяют изучать локальные физические условия, но обычно только в одной точке протяженной туманности. Спектроскопия, основанная на наблюдениях с помощью спектрографа с длинной щелью, позволяет объединить два этих метода. Для изучения динамики и эволюции протяженных объектов мы предлагаем такой инструмент - SING (Spectroscopic Investigation of Nebular Gas, спектроскопические исследования газа туманностей). Мы планируем установить его на борту китайской космической станции. В данной статье представлены общие задачи и предварительный оптический расчет прибора SING.

The ultraviolet spectral subdiapasons, both near UV (180-300 nm) and far UV (115-180 nm), are highly requested by astrophysicists. The successful space missions like IUE, HST, GALEX and others provided scientists with absolutely new data for astrophysical studies. Direct UV images of the sky allow tracking the morphology of extended objects (planetary nebulae, supernova remnants etc), but these data provide very limited information about understanding the physical conditions (temperature, density, radiation field). Spectroscopic observations make it possible to study local physical conditions, but usually only at one point in an extended nebula. Spectroscopy that is based on long-slit spectrograph observations allow to combine these both. To study dynamics and evolution of extended objects we propose such an instrument SING (Spectroscopic Investigation of Nebular Gas). We plan to install it onboard the upcoming Chinese Modular Space Station (CSS). Here we describe general objectives and preliminary optical layout of the SING.
Risk According to the Relational Theory of Society
Authors: Mangone Emiliana
Published: January 2021

Taking social relations into consideration allows us to be mindful of the life-world and the social system. A social relation should be intended as an emergent phenomenon of a mutual act, with an autonomous connotation that goes beyond those who implement it. At the same time, it can be traced back to referential semantics, as it exists within a framework of symbolic meaning, and to structural semantics, because it is at the same time a resource and a constraint for the social system. If these are the general foundations of the relational theory of society, adding risk to this perspective as a descriptive model has some distinguishing features. For example, as a dimension of everyday life it is a “neutral category.” It is based on that “insecure security” whose results, positive or negative, will derive from the kind of balance established between “resources and challenges” or, as we claim in this paper, between “goals and means.”
Voice of Society and the Crisis: The Potential and Limits of Reflexivity and Civility
Authors: Pérez-Díaz Víctor
Published: January 2021

The strategic capacity of human agency to orient itself in a context of growing uncertainty and complexity depends on the degree and quality of its reflexivity and relationality, and of the civic impulse arising from the connection between both. The present article explores this capacity by analysing the results of an opinion survey carried out in May 2016, and by developing an argument about one collective agent: the Spanish citizenry. Spanish citizens send three main messages. First, they opt for a European course and for a range of policies consistent with convergence (and debate) between the traditions of social democracy and conservative liberalism. Second, they are attentive to the task of recreating a political community. Third, they ask for civil forms of doing politics. To send these messages they draw on socio-cultural resources, and forms of reflexivity and relationality. The article addresses society’s relations with the political class and with itself and the cultural resources (economic knowledge, historical narratives) that map these relationships within their global context and their past.
Relational Versus Relationist Sociology: A New Paradigm in the Social Sciences
Authors: Donati Pierpaolo
Published: January 2021

The paper presents a general outline of the author’s relational sociology, showing it to be different from other relational sociologies, which are, in fact, figurational, transactional, or purely communicative. Relational sociology is conceived as a way of observing and thinking that starts from the assumption that the problems of society are generated by social relations and aims to understand, and if possible, solve them, not purely on the basis of individual or voluntary actions, nor conversely, purely through collective or structural ones, but via new configurations of social relations. The social is relational in essence. Social facts can be understood and explained by assuming that “in the beginning (of any social fact there) is the relation.”Ultimately, this approach points to the possibility of highlighting thoserelational processes that can better realize the humanity of social agents and give them, as relational subjects, the opportunity to achieve a good life in a society that is becoming increasingly complex as the processes of globalization proceed.
Relational Sociology Paradigms
Authors: Manterys Aleksander
Published: January 2021

This article is an analysis of three original variants of relational sociology. Jan A. Fuhse’s conception, which is part of the tradition of social network research, situates network analyses in the context of connections between culture and symbolic forms and styles. Fuhse’s idea involves a communicative base of relations, and he perceives institutions as spheres of communication that reduce uncertainty and activate roles in the process of communication. François Dépelteau’s approach, which is inspired by Dewey’s pragmatism, recognizes transaction fields as configurations of relations forming interdependency between people. The practices of actors entering transactions within social fields are important, and this makes it possible for an impression of continuity, order, and complexity to be created. Pierpaolo Donati’s relational realism is an attempt to describe the relational dimensions of human actions, while at the same time it is a consistent “relationization” of key social categories, and is also useful in understanding after-modernity. This article emphasizes the fruitfulness of new attempts to demarcate sociological genealogies and to read the classics of relational sociology. The author discusses the creation of new puzzles for sociological theory, the necessity of analysing the ontologies of social life, the phenomena of emergency and agency, and the use of relational theory in regard to categories of the common good and social capital. He encourages multidimensional and multilevel analyses of social reality.
PENDAMPINGAN PENGELOLAAN KEUANGAN BAGI BENDAHARA ASRAMA DI PONDOK PESANTREN NGALAH SENGONAGUNG PURWOSARI PASURUAN
Authors: Sholihun  , Setiadi Gatut
Published: January 2021

Manajemen keuangan menjadi hal yang sanagt penting dalam menjalankan berbagai sistem pendidikan di pondok pesantren. Salah satunya penerapan manajemen keuangan di Pondok Pesantren Ngalah Purwosari. Ada tiga faktor yang berperan dalam sistem penyelenggaraan Pondok Pesantren yaitu, manajemen sebagai faktor upaya, organisasi sebagai faktor Sarana, dan administrasi sebagai faktor karsa. Ketiga faktor ini memberi arah dan perpaduan dalam merumuskan, mengendalikan, penyelenggaraan, mengawasi serta menilai pelaksanaan kebijakan kebijakan dalam usaha menyelenggarakan kegiatan pendidikan yang sesuai dengan tujuan setiap Pondok Pesantren. Untuk menyesuaikan hal tersebut maka diperlukan adanya pendampingan pengelolaan keuangan bagi bendahara di setiap asrama pondok pesantren Ngalah dengan tujuan semua bendahara pondok dan asrama dapat mengimplementasikan pengelolaan keuangan dengan baik yakni dalam hal manajemen keuangan, organisasi pengelola, dan administrasi pengelolaan. Hasil dari pendampingan ini yakni: (1) bekal pemahaman secara menyeluruh bagi para bendahara selaku pengelolah keuangan; (2) pembuatan pedoman pembuatan anggaran keuangan di pondok pesantren Ngalah yang akan dijadikan acuan sehingga dalam pengelolaan akan muncul keseragaman dalam pengelolaan keuangan. 3) Kelengkapan informasi keuangan sangat terkait dengan data pendukung yang ada, terutama bukti transaksi seperti kwitansi, faktur, jurnal umum, buku besar dan beberapa pendukung laporan keuangan.
PENGELOLAAN KEUANGAN PESANTREN
Authors: Suryana Aep Tata
Published: January 2021

The purpose of this research is to find out the description of pesantren financial management. By the title of the research, the research uses the literature method. The results of the study explained that financial management is an act of financial administration/administration which includes recording, planning, implementation, accountability, and reporting. Thus, school financial management can be interpreted as a series of activities regulating school finance from planning, accounting, spending, supervision, and accountability of school finances. Financial management of boarding schools is one of the substances of the management of educational institutions that will also determine the smooth operation of boarding schools. As is the case with the substance of education management in general, financial management activities in Islamic boarding schools should be carried out through the processes of planning, organizing, directing, coordinating, supervising, or controlling. Some financial management activities take the form of obtaining and determining sources of funding, use of funds, reporting, auditing, and accountability. Through financial management activities, the funding needs of Islamic boarding school activities can be planned, procured, transparently recorded, and used to finance the implementation of Islamic boarding school programs effectively and efficiently. For that purpose, the financial management of Islamic boarding schools includes: (1) Improving the effectiveness and efficiency of the use of financial boarding schools; (2) Increasing financial accountability and transparency in Islamic boarding schools; and (3) Minimizing misuse of the boarding school budget.
Millennial-age glycerol dialkyl glycerol tetraethers (GDGTs) in forested mineral soils: 14C-based evidence for stabilization of microbial necromass
Authors: Gies Hannah , Hagedorn Frank , Lupker Maarten , Montluçon Daniel , Haghipour Negar , van der Voort Tessa Sophia , Eglinton Timothy Ian
Published: January 2021

Abstract. Understanding controls on the persistence of soil organic matter (SOM) is essential to constrain its role in the carbon cycle and inform climate–carbon cycle model predictions. Emerging concepts regarding the formation and turnover of SOM imply that it is mainly comprised of mineral-stabilized microbial products and residues; however, direct evidence in support of this concept remains limited. Here, we introduce and test a method for the isolation of isoprenoid and branched glycerol dialkyl glycerol tetraethers (GDGTs) – diagnostic membrane lipids of archaea and bacteria, respectively – for subsequent natural abundance radiocarbon analysis. The method is applied to depth profiles from two Swiss pre-Alpine forested soils. We find that the Δ14C values of these microbial markers markedly decrease with increasing soil depth, indicating turnover times of millennia in mineral subsoils. The contrasting metabolisms of the GDGT-producing microorganisms indicates it is unlikely that the low Δ14C values of these membrane lipids reflect heterotrophic acquisition of 14C-depleted carbon. We therefore attribute the 14C-depleted signatures of GDGTs to their physical protection through association with mineral surfaces. These findings thus provide strong evidence for the presence of stabilized microbial necromass in forested mineral soils.
Investigation and assessment of supplied water quality in Rajshahi
City Corporation of Bangladesh
Authors: Poly Saleha Akhter , Hasnat Arif , Tusher Hasib Imran , Rasel H. M.
Published: January 2021

Abstract. This paper has investigated the extensive implementation of distinct types of pipes in the Water Distribution System (WDS) and evaluated the impacts of particular leachable organic chemicals and bacteriological issues. Besides, the paper inspects significant parameters of water quality as the population of Rajshahi City, Bangladesh relies on water provided via pipes for drinking and other domestic purposes. This study aims to assess the quality of physical, chemical, and microbiological parameters of supplied drinking water through lines in Rajshahi City Corporation (RCC) by Rajshahi Water Supply and Sewerage Authority (RWASA). Therefore, the study managed a total of sixteen physical, chemical, and microbiological parameters to analyse them in the laboratory. The experimental results showed that pH and hardness of all samples were within the allowable limit as per Bangladesh Drinking Water Standards (BDWSs) and World Health Organization (WHO). All models contained an extreme level of iron and manganese. They also included a negligible amount of arsenic. The experiment detected lesser Dissolved Oxygen (DO), Residual Chlorine (Residual Cl), and the undesirable odour in about 90 % samples. All samples contained Total Coliform (TC) and Escherichia coli (E. coli) bacteria. A few samples contained a significant amount of turbidity, Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and Electrical Conductivity (EC). The authors developed a statistical analysis by SPSS software to co-relate the parameters. This study recommends the presence of such bacteria, iron, and manganese in the pipeline.