bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of temperature on the formability of an aluminum alloy
Authors: Kacem Ahmed , Laurent Hervé , Thuillier Sandrine
Published: April 2021

Warm forming is widely used as increasing the temperature is a solution to improve the formability of aluminum alloys. The stress (or strain) state is one of the most important factors affecting the formability of metals. In warm forming, the temperature and strain rate also play an important role on the deformation and fracture behavior. Figuring out the relationship between formability, temperature, strain rate and stress state is of great importance for providing more understanding of ductile fracture in warm forming conditions. Therefore, the objective of this work is to investigate the influence of temperature on the ductile fracture of a 6000 series aluminum alloy sheet metal under different stress states. Dogbone specimens, notched tensile specimens with different radius, tensile specimens with a central hole and shear specimens are used to cover a wide range of stress states. The hybrid experimental-numerical approach is used to identify the fracture strain and the corresponding stress state parameters (i.e. stress triaxiality and Lode parameter). To this end, fracture tests are carried out at 200°C using a tensile machine to determine the instant of fracture. Numerical simulations of the tensile tests are performed in 3D with the finite element code Abaqus to predict the strain field and calculate the evolution of the stress state. To accurately model the material behavior the positive strain rate sensitivity in the flow stress response at elevated temperature is considered. The results show a strong dependency of the ductile fracture on the temperature, strain rate and stress state.
Numerical/experimental investigation of bulge tests on a localized laser heat-treated magnesium alloy AZ31 sheet
Authors: Guglielmi Pasquale , Sorgente Donato , Palumbo Gianfranco
Published: April 2021

Lightweight alloys can be considered among the most promising materials thanks to their capability to reduce the environmental impact, without affecting mechanical properties. In addition, when very complex shapes are required, a viable strategy could be represented by the adoption of non-conventional forming processes applied to tailored blanks that allow to obtain local variation of the material properties. In fact, referred to the Mg alloys, both grain size and temperature strongly influence the deformation behavior, as well as the mechanical properties. In this work, the effects of a selective Laser Heat Treatment (LHT) on a Mg AZ31B-H24 alloy sheet were investigated both numerically and experimentally. Experimental tests were performed, using a Diode laser source and keeping a square spot stationary in the center of the sample. The microstructure evolution was evaluated by means of light microscopy. Subsequently, the heat-treated samples were subjected to bulge tests under superplastic conditions (450°C) and using pressurized argon gas. The experimental microstructure distributions obtained were used for the numerical bulge tests analyses performed in the same conditions of the experimental trials. Experimental LHT results showed the capability to locally modify the microstructure when suitable temperatures and interaction times are selected. Regarding the bulge tests, the obtained results showed the possibility to effectively affect the thickness distribution of the final shapes.
Validation of a multi-scale Ti-6Al-4V drilling model by means of thermomechanical field measurements
Authors: Bonnet Camille , Pottier Thomas , Landon Yann , Bouzid Abdallah
Published: April 2021

Drilling operations lead to temperatures and forces that may locally reach significant magnitude and thus impair the surface and material integrity. Optimizing the cutting conditions could limit these degradations, which are more significant in the case of low thermal conductivity materials such as titanium alloys. Robust numerical modelling is a relevant alternative to such issues but must rely on strong in-process experimental measurements. Unfortunately, the confined nature of the cutting area during drilling prevent from any straight forward field-measurement. The proposed multi-scale strategy consists in validating the developed 3D FEM models both at micrometric and millimetric scales, using coupled full-field measurements. The limited access to the cutting area is overcome by means i) of oblique cutting tests at microscale and ii) tube drilling tests. Thermal fields are evaluated using an infrared camera while kinematic fields are determined by image correlation (DIC) using a high-speed camera. The experimental and numerical fields are then compared, and numerical results are extended over several revolutions by means of purely thermal 2D analytical model.
Investigation of High-Depostition-Rate Additive Manufacturing of Ti-6Al-4V via Laser Material Deposition
Authors: Hama-Saleh Rebar , Yildirim Kerim , Hemes Susanne , Weisheit Andreas , Häfner Constantin Leon
Published: April 2021

Ti-6Al-4V is the most prominent titanium alloy widely used e.g. for aerospace applications. Conventionally, many Ti-6Al-4V aerospace components are produced by a multi-stage hot forging process followed by subsequent machining which often generates a high amount of scrap. Additive manufacturing (AM), such as powder-based laser material deposition (p-LMD), enables parts to be made with geometric freedom and near-net-shape, but so far lacks high deposition rates. The present study proposes high-deposition-rate laser material deposition manufacturing using a large laser beam diameter and increased scanning speed to achieve deposition rates up to 5 kg/h. As Ti-6Al-4V is prone to oxygen pick-up, the process was performed in an inert atmosphere. We determined suitable process windows for tracks without fusion defects and low porosity and investigated microstructure and hardness.
Friction Characterization of UHMWPE Cross-Ply Composite Sheets for Thermoforming Processes
Authors: Campshure Blake , White Kari D. , Sherwood James A.
Published: April 2021

Thermoforming is an attractive process for the low-cost high-volume manufacture of textile-reinforced composite structures with complicated geometries. Tool/ply and ply/ply frictions play critical roles during forming. The friction between the binder ring and the blank induce an in-plane tensile stress that mitigates wrinkling. Unwanted wrinkling can develop across the part if the in-plane stresses are too low but tearing of the material can occur if the applied stresses are too high. Understanding the role that friction plays during thermoforming can give insight on how to mitigate these manufacturing-induced defects in the part. In the current work, the coefficients of friction for two unidirectional cross-ply ultra-high molecular weight polyethylene (UHMWPE) materials are characterized as a function of pressure, fiber orientation, side of material, and pulling rate for [0/90/0/90] cross-ply sheets. The materials are tested at multiple fiber orientations to understand the influence that fiber direction has with respect to the coefficients of friction and on each respective side of the material to understand how surface topology influences the coefficients of friction. The results of the testing are found to correlate with modified Hersey numbers.
Twitter Integration of Chemistry Software Tools
Authors: Yoshikawa Naruki , Kubo Ryuichi , Yamamoto Kazuki
Published: April 2021

Social media activity on a research article is considered to be an altmetric, a new measure to estimate research impact. Demonstrating software on Twitter is a powerful way to attract attention from a larger audience. SNS integration of software can also lower the barriers to trying the tools and make it easier to save and share the output. We present three case studies of Twitter bots for cheminformatics: retrosynthetic analysis, 3D molecule viewer, and 2D chemical structure editor. These bots make software research more accessible to a broader range of people and facilitate the sharing of chemical knowledge, concepts, and ideas.
Six-Step Gram Scale Synthesis of the HIV Integrase Inhibitor Dolutegravir Sodium
Authors: Dietz Jule-Phillip , Lucas Tobias , Groß Jonathan , Seitel Sebastian , Brauer Jan , Ferenc Dorota , Gupton B. Frank , Opatz Till
Published: April 2021

A short and practical synthesis for preparing the active pharmaceutical ingredient dolutegravir sodium was investigated. The convergent strategy developed herein starts from 3-(R)-amino-1- butanol and builds up the BC ring system in 76% isolated yield over four steps. Ring A was constructed by a one-pot 1,4-addition to diethyl-(2E/Z)-2-(ethoxymethylidene)-3-oxobutandioate and subsequent MgBr2·OEt2-mediated regioselective cyclization. Amide formation with 2,4- difluorobenzylamine was either performed from the carboxylic acid or through aminolysis of the corresponding ester precursor. Final salt formation afforded dolutegravir sodium in 48–51% isolated yield (HPLC-purity: 99.7–99.9%) over six linear steps.
Ab Initio Electronic Dielectric “Constant” of Proteins: A Baseline for Electrostatic Interaction in Biomolecular Systems
Authors: Adhikari Puja , Podgornik Rudolf , Jawad Bahaa , Ching Wai-Yim
Published: April 2021

The protein dielectric constant reflects the molecular heterogeneity of the proteins and can be decomposed into different components depending on the size, structure, composition, locality, and environment of the protein in general. The long history of its computation and measurement attest to the vital importance of electrostatic interactions in protein physics that engendered diverse theoretical approaches based often on scattered methodologies with various adjustable parameters. We present a new robust computational method anchored in rigorous ab initio quantum mechanical calculation of explicit atomistic models, without any indeterminate parameters to compute and gain insight into the electronic component of the static dielectric constants of small proteins under different conditions. We implement the new methodology to the 20 canonical amino acids individually, a polypeptide RGD-4C (1FUV) in different environments, and the SD1 domain in the Spike protein of SARS-COV-2. The calculated electronic dielectric constants for 1FUV and SD1 in vacuum are 28.06 and 50.02 respectively. They decrease in the presence of aqueous bathing solution.
Stereospecific, Ligand-Free Synthesis of All-Carbon Quaternary Stereocenters from Tertiary Benzylic Carboxylates
Authors: Xu Jianyu , Pound Sarah , Basch Corey , Duke Alana , Watson Mary
Published: April 2021

Nickel-catalyzed, stereospecific cross-couplings via activation of secondary C–O bonds has been well developed in the past few years. Meanwhile, stereospecific cross-couplings of tertiary electrophiles have been rarely explored. Herein, we describe a nickel-catalyzed, ligand-free Suzuki-Miyaura vinylation, using easily prepared, highly enantioenriched tertiary benzylic carboxylates to install all-carbon quaternary stereocenters in high yields and ee’s. In addition to allowing stereospecific vinylation of these substrates for the first time, this method overcomes the longstanding requirement for a naphthyl group on the benzylic carboxylate
A Computational Study of the Properties of Pd, Cu and Zn Surface
Authors: Kabalan Lara , Kowalec Igor , Catlow Richard , Logsdail Andrew
Published: April 2021

We report a detailed Density Functional Theory (DFT) based investigation of the structure and stability of bulk and surface structures for the Group 10-12 elements Pd, Cu and Zn, considering the effect of the choice of exchange-correlation density functionals and computation parameters. For the initial bulk structures, the lattice parameter and cohesive energy are calculated, which are then augmented by calculation of surface energies and work functions for the lower-index surfaces. Of the 22 density functionals considered, we highlight the mBEEF density functional as providing the best overall agreement with experimental data. The optimal density functional choice is applied to the study of higher index surfaces for the three metals, and Wulff constructions performed for nanoparticles with a radius of 11nm, commensurate with nanoparticle sizes commonly employed in catalytic chemistry. For Pd and Cu, the low-index (111) facet is dominant in the constructed nanoparticles, covering ~50% of the surface, with (100) facets covering a further 10 to 25%; however, non-negligible coverage from higher index (332), (332) and (210) facets are also observed for Pd, and (322), (221) and (210) surfaces are observed for Cu. In contrast, only the (0001) and (10-10) facets are observed for Zn. Overall, our results highlight the need for carefully validation of computational settings before performing extensive density functional theory investigations of surface properties and nanoparticle structures of metals.
Сarcinogenic substances in the atmospheric air of Dnipro city and risk to the population
Authors: Serdiuk A.M. , Chernychenko I.O. , Lytvychenko O.M. , Babii V.F. , Kondratenko O.Ye. , Hlavachek D.O.
Published: April 2021

The objective – to study the dynamic changes for the health risk of the population of the industrial center in accordance with the state of atmospheric air pollution with carcinogenic compounds. The assessment of the state of atmospheric air pollution was carried out by us based on the results of physicochemical analysis of samples taken in places attached to the locations of stationary posts of state monitoring. The concentration of identified substances was determined by conventional methods: spectral-luminescent and gas chromatographic. Heavy metal concentrations were determined using data from the Central Geophysical Observatory of the Ministry of Emergency Situations. The calculation of the inhalation load of chemical carcinogens and the risks associated with them (non-carcinogenic and carcinogenic) was carried out in accordance with domestic guidelines. The assessment of dynamic changes in the nature of atmospheric air pollution with a complex of carcinogenic substances was made 5 of them are constantly recorded at levels exceeding hygienic standards. When compared with the reference concentrations, all compounds are characterized by high coefficients, indicating the likelihood of their effect on the body's immune system, respiratory organs, malformations, etc. A high individual carcinogenic risk of the effect of chromium VI and nitrosamines was determined. A total carcinogenic risk is formed at levels of 2.5 – 3.9×10-3, which should be considered as high; this requires development and implementation of preventive measures. On the territory of the industrial center, a high level of air pollution with increased carcinogenic and non-carcinogenic risk is stably registered.
Risk classification of IT enterprises: accounting aspect
Authors: Олена Адамівна Лаговська  , Ірина Леонідівна Грабчук  , Габріелла Людвиківна Лоскоріх
Published: April 2021

The presence of significant risks is one of the features of an IT enterprise. This necessitates a thorough study and justification of the types of risks that affect it. The purpose of the article is to determine the classification signs of risks of IT enterprises that determine the choice of accounting and analytical technologies for their management. To achieve this goal, a critical assessment of scientists' approaches to risk sharing was carried out. It has been established that the overwhelming majority of scientists, when constructing a risk classification in the IT sector, characterizes directly the work on IT products, projects, but does not take into account the organizational factors of the IT enterprise.It has been proven that the activities of an IT enterprise are influenced by both general (inherent in all business entities, regardless of the field of activity) and specific risks. When building a risk classification for IT companies, one should take into account such characteristics as the scope and consequences of the risk. The expediency of dividing risks according to the last criterion into admissible, critical, catastrophic is indicated. Specific risks are characterized by their factors, which made it possible to identify the risks of an IT project (associated with execution time, costs and quality) and risks of organizing and carrying out activities (technological, personnel, market and legal). The article provides a characteristic for each type of risk and discloses their significance for accounting and analysis. The proposed classification of risks of an IT enterprise creates a theoretical basis for their effective management. Further details of risks are carried out for each IT enterprise.
Features of the formation, accounting and distribution of profits of an innovative enterprise
Authors: Галина Валеріївна Берляк  , Стелла Євгеніївна Пиріжок
Published: April 2021

Making a profit is a desirable financial result that all business entities strive for. To minimize the negative consequences of risk in innovative enterprises, it is necessary to create reserves. The article establishes that the directions for using the net profit of an innovative enterprise are determined at the legislative level, however, according to the specifics of innovation, it is recommended to include reserve (insurance) capital, a fund for the development and improvement of production, as well as other special purpose funds in fixed assets created from profit. These recommendations for the funds analyzed and proposed in the article are analytical sections for the needs of accounting support in accordance with the characteristics of the activities of newly created innovative enterprises. These reserves take into account the peculiarities of newly created innovative enterprises that ensure the development of the activities of such business entities, both at the initial stages of the development of activities, and for the purpose of further existence, and can also be used in the event of unfavorable business conditions to minimize the risks of activities and other negative phenomena.
The Accounting Practices and Environmental Agenda in the Malaysia Airports
Authors:   University Malaysia Sabah, Masdar Noor Muafiza
Published: April 2021

The environmental agenda is a big thoughts by the United Nations especially to the aviation business due to its high regulated industry involve. Malaysia is one of the member states and this agenda should be implemented by the airport business. More or less this environmental agenda will influence the accounting practices among Malaysia airports especially in terms of cost and budget allocation. The Malaysia airports have the awareness to implement this environmental practices, however, in which way this practice being implemented and how far it will impact to the accounting approach still being question. Therefore, this study seek to examine the way in which the environmental agenda influences the accounting practices in the Malaysia airports. The data collected in this study are through interviewing the East Malaysia Airports with nine personnel altogether. The observation also take place by visiting the environmental project in the airports. The data then been analyzed by using thematic approach. Underlying to the social capital theory, it is found that Malaysia airports have implemented the environmental practices based on the level of needed and budget that they have. Then, this environmental practices shapes the accounting approaches in terms of budget and cost allocation of the East Malaysia airports.
Factors Influencing Employees’ Commitment in the Public Institution: Empirical Evidences in Malaysia
Authors:   Universiti Malaysia Perlis, Malaysia, Saraih Ummi Naiemah
Published: April 2021

This research is conducted to look on several factors which are expected to create an impact on employees’ commitment in one of the public institution in Peninsular Malaysia. In specific, the aim of this research is to provide the linkages between organizational commitment and several factors in the perspectives of job performance, organizational justice and organizational citizenship behavior (OCB). Thus, the proposed research objectives are: 1) to identify the relationship between job performance and organizational commitment among employee in the public institution; 2) to explore the relationship between organizational justice and organizational commitment among employee in the public institution; and 3) to examine the relationship between OCB and organizational commitment among employee in the public institution. In accordance to that, a scientific literature review has been developed; and the participants of this research are included of 165 employees from one of the public institution located in the center region of Peninsular Malaysia. With the aid of SPSS software, the results indicated that all of the factors are positively and significantly related to organizational commitment among employee in this institution. The implications and several suggestions are discussed based on the research findings.
Regional effects of natural disasters in China: Investing in post-disaster recovery
Authors: Noy Ilan , Vu T
Published: April 2021

We examine the effects of natural disasters on income and investment in China. Using macro-economic province-level data and the provincial history of disaster exposure over the past two decades, we describe the relationship between
disaster mortality and morbidity, disasters’ economic damages, government investment and regional economic activity and infrastructure development. The Chinese government’s aggressive investment in post-disaster reconstruction is discussed, and the implications of this investment for post-disaster private sector economic activity are analyzed empirically. We further investigate the differential effects of natural disasters on economic activity in China’s diverse geographical regions.

This is a post-peer-review, pre-copyedit version of an article published in 'Natural Hazards'. The final authenticated version is available online at: https://doi.org/10.1007/s11069-014-1274-5. The following terms of use apply: https://www.springer.com/gp/open-access/publication-policies/aam-terms-of-use.
Unit-Lapse Forms of Various Spacetimes
Authors: Baines Joshua
Published: April 2021

Every spacetime is defined by its metric, the mathematical object which further defines the spacetime curvature. From the relativity principle, we have the freedom to choose which coordinate system to write our metric in. Some coordinate systems, however, are better than others. In this text, we begin with a brief introduction into general relativity, Einstein's masterpiece theory of gravity. We then discuss some physically interesting spacetimes and the coordinate systems that the metrics of these spacetimes can be expressed in. More specifically, we discuss the existence of the rather useful unit-lapse forms of these spacetimes. Using the metric written in this form then allows us to conduct further analysis of these spacetimes, which we discuss.

Overall, the work given in this text has many interesting mathematical and physical applications. Firstly, unit-lapse spacetimes are quite common and occur rather naturally for many specific analogue spacetimes. In an astrophysical context, unit-lapse forms of stationary spacetimes are rather useful since they allow for very simple and immediate calculation of a large class of timelike geodesics, the rain geodesics. Physically these geodesics represent zero angular momentum observers (ZAMOs), with zero initial velocity that are dropped from spatial infinity and are a rather tractable probe of the physics occurring in the spacetime. Mathematically, improved coordinate systems of the Kerr spacetime are rather important since they give a better understanding of the rather complicated and challenging Kerr spacetime. These improved coordinate systems, for example, can be applied to the attempts at finding a "Gordon form" of the Kerr spacetime and can also be applied to attempts at upgrading the "Newman-Janis trick" from an ansatz to a full algorithm. Also, these new forms of the Kerr metric allows for a greater observational ability to differentiate exact Kerr black holes from "black hole mimickers".
Desenvolvimento profissional de professores: um olhar para o ensino de Estatística nos Anos Iniciais do Ensino Fundamental
Authors: Sousa Helenita Jesus , Couto Maria Elizabete Souza
Published: April 2021

Este artigo tem por objetivo analisar o desenvolvimento profissional de três professoras que ensinam conceitos estatísticos nos anos iniciais do Ensino Fundamental, a partir das vivências em um processo formativo realizado na escola. A pesquisa de abordagem qualitativa aconteceu no contexto Universidade-Escola, fundamentada na colaboração no âmbito da pesquisa acadêmica. A formação aconteceu ao longo de 14 encontros em uma escola municipal no Baixo Sul da Bahia, no período de fevereiro de 2018 a dezembro de 2019. Foi promovido o estudo sobre conceitos estatísticos, com ênfase no planejamento e desenvolvimento de sequências de ensino em sala de aula. A coleta sistemática de dados foi realizada em dois momentos, sendo utilizados como instrumentos: 1) questionário “Perfil do professor”; e 2) entrevista semiestruturada. A análise, por meio da metodologia de Análise Textual Discursiva e realizada com base nos pensamentos de Antônio Nóvoa, Cristopher Day, Marcelo Garcia e João Pedro da Ponte, indicam o desenvolvimento profissional das professoras, ao demonstrarem em seus relatos a ampliação de suas capacidades para refletirem sobre suas próprias práticas e concepções acerca do ensino e da aprendizagem dos conceitos de Estatística, a partir das experiências vividas e dos conhecimentos adquiridos e ampliados durante o processo formativo.
Sistem Pengenalan Spesifikasi Mobil pada Showroom Berbasis Haar-Like Features
Authors: Lehman Andrew Sebastian , Sanjaya Joseph
Published: April 2021

Changes in science and technology have affected the structure of societies and have led to rapid change in human profile. In order to adapt to the changing human profile, reforms in advertising as well as scientific and technological enrichment in advertisement environments have become necessary. This study aims to investigate the impact of advertisement materials developed with augmented reality (AR) technology on car specification presentation and attitudes towards the advertisement, and to determine their attitudes towards AR applications. In this study, AR application was developed using haar-like features method for marker detector. A quasi-experimental design was used in which intact showroom at two different location, consisting of a total of one hundred customers, were randomly assigned to either the experimental or control group. The experimental group researched their selected car using AR technology, while the control group researched their selected car using traditional methods and the help of salesman. Customers in the experimental group were found to have higher understanding and slightly faster to learn about the car than those in the control group. In addition, the results revealed that the customers were pleased and wanted to continue using AR applications in the future. They also showed no signs of anxiety when using AR applications. In addition, it was found that advertisement achievements and attitudes of the customers in the experimental group showed a positive, significant and intermediate correlation.
Analisis Promethee II Sebagai Pendukung Keputusan Pemilihan Media Sosial
Authors: Saifulloh Saifulloh
Published: April 2021

Nowadays, people cannot get away from social media. Social media is a part of the life of the wider community today, from teenagers to the elderly, many of which use social media to fill their spare time. Trends in the use of social media from various circles of society have many functions, such as news updates, online communication tools, sharing (data, images, and voice) without having to meet face to face. The impact of all social media use, this study aims to select the most popular social media used based on function, interest, or interface. This study uses the Promethee II method as an analysis of social media selection decisions with the results of calculations using Excel 2019. The alternative criteria objects in this study use popular social media such as Instagram, Whatsapp, Facebook, Line, and Telegram. The research method uses the stages of data collection, namely the survey method, distributing questionnaires to respondents to provide responses to the most popular social media assessors.
Pengembangan Sistem Informasi Tukar Barang Untuk Pemanfaatan Barang Tidak Terpakai dengan Flutter Framework
Authors: Santoso Sulaeman , Surjawan Daniel Jahja , Handoyo Erico Darmawan
Published: April 2021

Humans in general can not be separated from the consumptive lifestyle. Problems related to ownership of goods that are no longer in use are increasing. These items are stored and never used again by the owner. Most of these items do not have high sales value because of the condition of used goods or for some people the goods are unused. The item can be valuable in the hands of those who need it. Problem occur when information on the unused item does not reach to the person in need. This research attempt to develop an exchanging unused goods system without a payment process. Each item will be worth one token, this is done to prevent system exploitation, this differentiate the proposed system with other bartering system. Furthermore, the system was developed to be a portal in providing information and facilitating people who will barter their goods that are not used. For the process of giving and taking goods will be done separately
Nevroloji dilemma: Üz iflicinin mərkəzi və ya periferik olduğunu kliniki necə ayırd etməli?
Authors: Məmmədova Mərziyyə Y. , Mirzəyev Sahil S. , Salayev Kamran
Published: April 2021

Giriş: Ədəbiyyata geniş baxış keçirilərək üz əzələləri ifliclərinin kliniki differensasiyası barədə fikirlər araşdırıldı.

Məqsəd: Üz siniri neyropatiyası ilə əlaqədar kliniki incə məqamların araşdırılması, bəzi anlaşılmazlıqlara aydınlıq gətirilməsi və  həkimlərin bu məlumatlarla tanış edilməsi.

Nevrologiya üzrə həm yerli, həm də əcnəbi müəlliflərin dərsliklərinin, monoqarfiyalarının, rəhbərliklərinin əksəriyyətində üz sinirinin neyropatiyasının mərkəzi və periferik səbəbli formaları əslində olduğundan sadə təsvir olunur və ya bu formaların arasındakı fərqlərə, üst-üstə düşmələrə yetərincə nəzər yetirilmir. Həmçinin, görünür elə  buna görə də  bu cür baxış həkimlərin üz siniri neyropatiyası ilə bağlı sosial şəbəkələrdə müzakirələrində də öz əksini tapır. Bu cür baxış asan olsa da, real xəstə ilə bağlı heç də həmişə özünü doğrulda bilməz.   Son illərdə həm dövrü tibbi ədəbiyyatda, həm də nevrologiya üzrə rəhbərliklərdə bu barədə maraqlı məlumatlar qeyd olunmuşdur.

Material və Metodlar: Bizim tərəfimizdən mövcud kliniki protokollara, Koxreyn bazasına, orijinal məqalələrə, nevrologiya üzrə dərslik, monoqrafiya və rəhbərliklərə baxış keçirilmişdir. Əsasən son 10 ildə dərc olunmuş materiallara diqqət verilmişdir.

Nəticə: Müasir ədəbiyyatda göstərilən incəlikləri nəzərə alınmaqla üz siniri neyropatiyasına əsaslı baxış diaqnostik səhvlərin qarşısını ala bilər.
Asetamenofenlə (parasetamol) ilə zəhərlənmə
Authors: Əfəndiyev İ. N. , Seyidov N. Z.
Published: April 2021

Asetamenofen (parasetamol) dünyada ən çox istifadə edilən reseptsiz buraxılan analgetik vasitədir. Ehtiyatsızlıqdan uşaqların dərman təsirinə məruz qalma halları və qəsdən ozünü zəhərləmə hadisələrində böyük rol oynayır və bir çox qərb ölkələrində zəhərlənmələr üzrə informasiya mərkəzlərinə edilən zənglərə görə farmakoloji preparatlar arasında aparıcı yeri tutur. Azərbaycanda hadisələrin dəqiq sayı məlum deyildir. Lakin, uşaqlar və böyüklər arasında qızdırma və ağrı əleyhinə vasitə kimi geniş istifadəsini, eyni zamanda tərkibində parasetamol olan çoxlu sayda kombinasiya olunmuş preparatların mövcudluğunu nəzərə alaraq, doza həddinin aşırılmasının yüksək ehtimalı haqqında məlumatlı olmaq və parasetamolun doza həddinin aşırılması/parasetamolla zəhərlənmə hallarında görüləcək tədbirlər barədə biliklərə sahib olma böyük əhəmiyyətə malikdir. Parasetamol, eyni zamanda, dərman preparatlarının doza həddinin aşırılması ilə əlaqədar xəstəxanaya müraciət və hospitalizasiya halları zamanı ən çox qəbul edilən sadə preparatdır. Müasir dövrdə qaraciyər çatışmazlığı və ölüm az hallarda baş verən ağırlaşmalardır, lakin bu günlərdə də Qərb ölkələrində kəskin fulminant qaraciyər çatışmazlığının ayrı-ayrı etioloji səbəbləri arasında ən böyük pay parasetamola məxsusdur.
Ciudadanía y derechos humanos de migrantes latinoamericanos en el contexto de emergencia sanitaria por COVID 19 en Argentina
Authors: De Ortúzar María Graciela
Published: April 2021

En el contexto de emergencia por COVID 19 en Argentina, los migrantes latinoamericanos han sido excluidos, en su mayoría, del Ingreso Familiar de Emergencia brindado por el Estado ante el cierre de fronteras y el Aislamiento Social Preventivo y Obligatorio. El objetivo del presente trabajo consistió en el análisis crítico de   las razones que llevaron a esta diferencia de trato en políticas de emergencia en Argentina. En primer lugar, se (I) investigó sobre el uso del criterio restrictivo de ciudadanía moderna supuesto en políticas sociales “universalistas”, analizando la concepción de igualdad subyace a las mismas. En segundo lugar, se (II) profundizó el estudio de cómo los cambios recientes en políticas de migraciones, a partir del DNU 70/2017, llevaron a la precarización e irregularidad de situación en la que se encontraban los migrantes previamente a la emergencia por COVID 19. Aplicando una metodología multidimensional, se abordaron elementos conceptuales-filosóficos, normativos y empíricos. A modo de conclusión general, se planteó la necesidad de repensar modelos de pertenencia no circunscriptos a la nacionalidad e igualitarios, reconociendo los derechos de todo habitante y residente, y avanzando hacia nuevas concepciones post nacionales inclusivas y pluriculturales que permitan revertir la histórica vulneración de derechos humanos de migrantes.
RACISM: AFRICAN AMERICANS’ EXPERIENCES AS VICTIMS OF SLAVERY AND SEGREGATION AS IMPLEMENTED BY THE POLICIES OF WHITE SUPREMACY
Authors: Bedell Fred
Published: April 2021

This essay will be divided into three parts – Slavery, Segregation, and Past and Recent Events that will document the impact on the social, political, and economic fabric of marginalized communities. It will focus on the social construct theory of domination and subordination and the caste system that subjugated African Americans under the guise of white supremacy
The Effect of Covid-19 Phobia on Perceived Stress: The Sample of Prehospital Emergency Care Professionals
Authors: ÜLKER DÖRTTEPE Zümra , HOŞGÖR Haydar , SAĞCAN Hatice
Published: April 2021

In this study, the effect of Covid-19 phobia on perceived stress in prehospital emergency care professionals was investigated. No sampling method was implemented in this study, and it was tried to access the whole population (n = 102).
The study was conducted between July 2020 and August 2020. The study data were collected through the face-to-face interview. Descriptive statistics, t test, ANOVA, Pearson's correlation and simple regression analysis were used
to analyze the data. The results of the analysis revealed that the perceived stress levels were moderate or high in approximately one third of the prehospital EMS professionals. The participants' Covid-19 phobia levels were low.
The perceived stress levels were significantly higher in the participants who were 30 years old or younger, single or working with the title of paramedic. Similarly, Covid-19 phobia levels were also significantly higher in women,
participants aged 30 and under, and those diagnosed with Covid-19. There was a moderate (r = .68), positive and significant correlation between Covid-19 phobia levels and perceived stress levels. Therefore, as the Covid-19 phobia
levels of prehospital EMS professionals increased, so did their perceived stress levels. The result of the regression analysis demonstrated that a one-unit increase in EMS professionals' Covid-19 phobia levels increased their perceived
stress level by 0.46. A correlation was determined between Covid-19 phobia and the perceived stress in prehospital EMS professionals and thus it is recommended that larger-scale studies should be conducted to better determine this
relationship and that interventional practices should be planned.
Investigation of Relationship Between Health Literacy with Anti-Vaccine: A Study on College Students
Authors: GÖDE Ali , ERTAŞ Handan
Published: April 2021

Bu araştırma sağlık alanında eğitim alan önlisans düzeyindeki öğrencilerin sağlık okuryazarlığı ile aşı karşıtlığı arasındaki ilişkinin incelenmesi amaçlanmıştır. Bu amaç doğrultusunda araştırma verileri anket yöntemiyle nicel araştırma
desenine uygun olarak online toplanmıştır. Araştırmanın verilerini toplamak için, kişisel bilgi formu, “Sağlık Okuryazarlığı Ölçeği” ve “Aşı Karşıtlığı Ölçeği” kullanılmıştır. Araştırmaya kolayda örneklem yöntemiyle 450 öğrenci
katılım sağlamıştır ve katılmayı kabul eden bireylerin %80’i kadın, %20’i erkektir. Katılımcıların %45,6’sı 18-19 yaş grubunda, %41,3’ü 20-21 yaş grubunda ve %13,1’i 22 üzeri yaş grubunda olduklarını belirtmişlerdir. Öğrencilerin
%54,4’ü 1. sınıf düzeyinde, %45,6’i 2. sınıf düzeyindedir. Ayrıca öğrencilerin %20,2’si Anestezi, %20,7’si İlk ve Acil Yardım, %20’si Tıbbi Dokümantasyon ve Sekreterliği, %13,8’i Tıbbi Görüntüleme Teknikleri, %12,2’si Tıbbi Laboratuvar
Teknikleri ve %13,1’i Yaşlı Bakımı programlarında eğitim almaktadırlar. Elde edilen verilerin geçerlilik ve güvenilirliği sağladığı belirlendikten sonra, verilerin normallik analizi yapılmış ve verilerin normal dağıldığı tespit
edilmiştir. Verilerin normal dağıldığının tespit edilmesi üzerine yapılan analizlerde, anova, bağımsız gruplarda t testi ve pearson korelasyon parametrik analizler uygulanmıştır. Araştırmanın sonucunda, araştırmaya katılan öğrencilerin
sağlık okuryazarlığı düzeyleri ile aşı-karşıtlığı düzeyleri arasında anlamlı ve negatif yönlü bir ilişki olduğu tespit edilmiştir. Ortaya çıkan bu sonuç doğrultusunda eğer bireylerin sağlık okuryazarlık düzeyleri artıkça aşı karşıtı
tutumlarının azalacağı ön görülmektedir.
Studi Pembuatan Mie Kering Berbahan Baku Tepung Singkong Dan Mocal (Modified Cassava Flour)
Authors: Mariyani Neny
Published: April 2021

The objectives of this research is to find the best formulation of cassava flour and mocal (modified cassava flour) based dry noodle which can compete with wheat flour based dry noodle. This research consist of experiments with several variation of composition cassava flour and mocal including 40% and 50%.  Mocal used in this research was produced from spontaneous fermentation which would be compared with commercial mocal which was usually produced from non-spontaneous fermentation. Spontaneous fermentation is natural fermentation process which no added  microorganisms.  The sensory evaluation of dry and rehydration noodles which are physical appearance, color, odor, taste, gumminess and extensibility. The data was analized by ANOVA (Analysis of Variance) and then Duncan Test. The best result was then examined`for it’s chemical composition like moisture content, ash, crude fat, protein and carbohydrate (crude fiber). The result showed that the best formulation to produced dry noodle use mocal from spontaneous fermentation with composition 40% mocal and 60% wheat flour. The best dry noodle contained (wet weight basis) of 12,31% moisture content, 3,97% ash, 6,69% protein, 1,13% crude fat and 3,86% crude fiber.Keyword : cassava flour, mocal, spontaneous fermentation, commercial mocal
Potensi Ekstrak Oligosakarida Ubi Jalar Sebagai Prebiotik Bakteri Probiotik Akuakultur (The Potential of Sweet Potato Oligosaccharide Extract as Aquaculture Probiotic Bacteria Prebiotic)
Authors: Lesmanawati Wida , Widanarni Widanarni , Sukenda Sukenda , Purbiantoro Wahyu
Published: April 2021

Sweet potato contains non digestible oligosaccharides that functions as prebiotics. The processing will affect the chemical composition of sweet potato. This study aimed to find the best preparation method of sweet potato (Ipomoea batatas) that can produce the highest oligosaccharide extract and test the prebiotic potential of the extract to support the growth of bacteria SKT-b which has been shown to act as a probiotic for shrimp. Trial I: test the preparation method of sweet potato to obtain the best oligosaccharides extract. The treatment consisted of three different preparation methods, raw potato flour, raw potato flour steamed, and steamed potato flour. Oligosaccharides from potato flour of each preparation method was then extracted and analyzed using High Performance Liquid Chromatography. Potato oligosaccharides extract from best preparation method, was dried in freeze dryer and used for later experiments. Trial II: test the potato oligosaccharides extract as prebiotic in supporting the growth of probiotic bacteria SKT-b (in vitro). This experiment was conducted to determine the combinations of prebiotic dose with inoculants concentrations that result the best growth of bacteria SKT-b. Liquid culture bacteria SKT-b concentrations of 107, 108, 109, and 1010 cfu ml-1 were cultured in sterile sea water mixed with prebiotics concentrations of 0, 1, 2 and 3% v/v. The extract of steamed potato flour contains the highest oligosaccharides, and may act as prebiotics to support the growth of probiotic bacteria SKT-b. Prebiotics 3% and probiotics SKT-b 1010 cfu ml-1 was the best sinbiotic combination, which showed the highest growth of probiotic bacteria.Keywords: oligosaccharides, probiotics SKT-b, sinbiotic, sweet potato
Model Pengaruh Persepsi Terhadap Kepuasan dan Loyalitas Pemustaka di Perpustakaan Nasional Republik Indonesia (Models Influence Perceptions to Satisfaction and Loyalty Library Users in National Library of The Republic of Indonesia)
Authors: Tamara Leli , Syamsun M. , Sarma Ma'mun
Published: April 2021

Improvement of service quality should be done consistently. Services of the National Library of the Republic of Indonesia should be based on the principle of public service. Efforts to improve the service factor will help deliver satisfaction and value -added library. Therefore, this research aimed to analyze influence perceptions to satisfaction and loyalty library user’s in National Library of The Republic of Indonesia. This research was conducted at the National Library of the Republic of Indonesia on closed access services. Methods of testing instruments used were SPSS Software 16.00 and hypothesis testing used structural equation modeling (SEM) by software SmartPLS 2.00. Characteristics of respondents predominantly female (68%), aged 17-25 years (82%), working as a student (79%) and educated S1 (76 %). Based on the analysis of SEM with PLS approach, we can see the influence of the six basic elements of the library (electronic resources, print publications, other services, technical facilities, library environment, human side) to the value, satisfaction and loyalty. The results showed, the other services have a significant influence with the value of the users in the National Library of the Republic of Indonesia. While the variables of human side, environmental and electronic library resources influenced to satisfaction in the National Library of Indonesia. While the value of users variables significantly influenced to loyalty in the National Library of the Republic of Indonesia. Therefore it can be concluded that not all of the basic elements of the library have influence to value, satisfaction and loyalty.Keywords : quality of service, value, satisfaction , loyalty, partial least squares (PLS)
Pembuatan Produk Multimedia Sebagai Media Informasi Dan Dokumentasi Pertanian Di Balai Besar Pengkajian Dan Pengembangan Teknologi Pertanian
Authors: Sari Nita Qonitah Desy Ayu , Setiawan Aep , Nurwullan Elya
Published: April 2021

ABSTRACT

The Indonesian Center for Agricultural Technology Assessment and Development (BBP2TP) is a Research, study and development center for agricultural technology that houses 31 Agricultural Technology Assessment Centers (BPTP) in regions that produce location-specific agricultural technology. BBP2TP is a means to convey information about agricultural products from farmers, researchers and extension workers to the public by using electronic media in the form of news, articles, powerpoint slides and printed media in the form of brochures and books in terms of providing information and documentation. Based on this, several multimedia products were made such as posters, video tutorials, and video documentation of activities.The method used in making this multimedia product was made according to what was done during the Field Work Practices (PKL) at BBP2TP both when working on posters, video tutorials and video documentation of activities. There are four stages: observation, data collection, editing, and testing.

ABSTRAK

Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian (BBP2TP) adalah Balai penelitian, pengkajian dan pengembangan teknologi pertanian yang menaungi 31 Balai Pengkajian Teknologi Pertanian (BPTP) di daerah yang menghasilkan teknologi pertanian spesifik lokasi. BBP2TP menjadi sarana untuk menyampaikan informasi tentang produk pertanian dari petani, peneliti dan penyuluh kepada masyarakat dengan menggunakan media elektronik berupa berita, artikel, slide powerpoint dan media cetak berupa brosur dan buku dalam hal pemberian informasi dan dokumentasi. Berdasarkan hal tersebut, maka dibuatlah beberapa produk multimedia seperti poster, video tutorial, dan video dokumentasi kegiatan.Metode yang digunakan dalam pembuatan produk multimedia ini dibuat sesuai dengan apa yang dilakukan saat Praktik Kerja Lapang (PKL) di BBP2TP baik saat mengerjakan poster, video tutorial maupun video dokumentasi kegiatan. Terdapat empat tahapan yaitu observasi, pengumpulan data, proses penyuntingan, dan pengujian.
Buscando las pepitas de oro. Filtros
Authors: Manuel Molina Arias
Published: April 2021

Una vez que hemos obtenido los resultados de una búsqueda bibliográfica, podemos separar conjuntos de artículos agrupados por una serie de criterios específicos. Esto puede llevarse a cabo con el uso de los filtros de Pubmed o con una de las herramientas del buscador, las Clinical Queries, que seleccionan los trabajos relacionados con la investigación clínica.
Quien no tiene preguntas… Pregunta clínica estructurada
Authors: Manuel Molina Arias
Published: April 2021

Las dudas de conocimiento deben expresarse en forma de preguntas clínicas estructuradas que contengan los siguientes elementos: (P) pacientes, (I) intervención, (C) comparación y (O) resultado (outcome, en inglés). Estos cuatro elementos nos servirán posteriormente para articular la búsqueda bibliográfica que nos permitirá obtener la respuesta a nuestra laguna de conocimiento.
CRM en una Unidad de Cuidados Intensivos: Mejorando la seguridad en el paciente crítico
Authors: Inmaculada Hernández García  , María Lema Tomé  , Pilar Cabrerizo Torrente  , Estefanía Chamorro García  , Ana Isabel Galve Marqués  , Susana Gago Quiroga
Published: April 2021

El factor humano contribuye en la mayoría de los eventos adversos que suceden tanto en aviación como en nuestro entorno médico. El conocimiento y entrenamiento del factor humano es lo que se conoce como CRM (“Recursos para el manejo de las crisis”). El objetivo de este estudio fue determinar si la implementación del CRM en una Unidad de Cuidados Intensivos conlleva algún impacto en el desenlace del paciente crítico. ABSTRACT CRM in intensive care unit: improving critical patient safety.  Human factors account for the majority of adverse events in both aviation and medicine. Human factors awareness training entitled “Crew Resource Management (CRM)” is associated with improved aviation safety. We determined whether implementation of CRM impacts outcome in critically ill patients.