bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fuzzy technologies in control systems of lifting and transport mechanisms
Authors: Sinyukov A. V. , Sinyukova T. V. , Abdullazyanov E. Yu. , Gracheva E. I. , Meshcheryakov V. N. , Valtchev S. 
Published: April 2023

THE PURPOSE. The study is devoted to the problems of ensuring the smooth start and stop of lifting and transport mechanisms. Standard regulators do not allow you to achieve the desired results with changing indicators, the exact values of which are not always available for measurement. Control signals, in such systems, usually correspond to data from a certain range. The paper proposes to replace the standard controller with a controller based on fuzzy algorithms. The process of modeling a system with different types of controllers allows you to explore systems and identify the most optimal of.METHODS. To solve the problem, the methods of mathematical modeling in the MatLab Simulink environment were used.RESULTS. The article considers the possibility of using various kinds of regulators on lifting and transport mechanisms. For the functioning of the fuzzy type controller, a rule base has been developed that forms the process of operation of a real object, with an optimal functioning algorithm. Systems with a PID-type controller, with a neural network-type controller with network training, with the possibility of its adjustment for further use, are implemented, the probability of high processor load is taken into account, on the basis of which a supervisor is proposed. The possibility of using ANFIS networks for the implementation of regulators is considered.CONCLUSION. The use of different types of controllers operating on the principle of neural network technologies makes it possible to achieve optimal performance in the control of lifting and turning mechanisms, both from the standpoint of ensuring the stability of movement, and from the standpoint of system reliability. Compared with the PID type controller, the application of the ANFIS network reduced the fluctuation by 2.9 times, and the use of the fuzzy type controller reduced the fluctuation by 0,75 times. The use of a neural controller compared to the use of the ANFIS network gives a decrease in the fluctuation of the speed formation process by about 0.48 times.
Investigation of rheological properties of composite suspension fuels
Authors: Zvereva E. R. , Mingaleeva G. R. , Valiullin B. R. , Zverev L. O. , Lipatov M. S. 
Published: April 2023

THE PURPOSE. The features of the rheological behavior of composite fuel oil suspensions depending on the shear rate, temperature and composition of the composite fuel are considered.METHODS. Suspensions with a coal content of 30, 40 and 50% (by weight) were prepared. The mixing time varied from 1 to 10 minutes. The samples of fuel oil were examined using a Rheomat RM 100 rotary viscometer to determine the values of dynamic viscosity at different shear rates and temperature.RESULTS. The results of experimental studies of the dynamic viscosity of fuel oil as a function of the shear rate and temperature are obtained. The best values of coal dust content in fuel oil suspensions for fuel transportation have been determined.CONCLUSION. The obtained research results can be used by both energy companies and transport companies to determine the technological viscosity indicators of composite suspension fuels used as boiler fuel and fuel for marine engines.
Analisis Semiotik Siswa SMP dalam Menyelesaikan Masalah Geometri Ditinjau dari Perspektif Peirce
Authors: Purwasih Ratni , Turmudi Turmudi , Dahlan Jarnawi Afgani 
Published: April 2023

Semiotika memiliki peran untuk menunjukkan pentingnya makna tanda dalam pembelajaran matematika. Lingkaran merupakan bagian dari matematika yang pemahaman konseptualnya sangat bergantung pada interpretasi tanda, terutama dalam proses pemecahan masalah yang melibatkan proses kognitif. Tulisan ini bertujuan untuk mendeskripsikan proses kognitif siswa dalam pemecahan masalah, melalui hubungan antar komponen triadik (semiosis) Peirce, yaitu representamen (R) - object (O) - interpretant (I). Penelitian ini merupakan penelitian deskriptif kualitatif melalui tahapan pemberian pertanyaan (masalah), penentuan subjek, wawancara, analisis data, dan penarikan kesimpulan. Subjek dipilih berdasarkan prestasi belajar. Hasil penelitian ini menemukan tiga tahapan dalam proses semiotik: 1) representamen (membuat tanda), 2) objek (mengidentifikasi objek, 3) interpretan (menginterpretasi tanda). Oleh karena itu, penelitian ini penting untuk membantu meningkatkan kualitas pendidikan di Indonesia dengan memberikan informasi tentang bagaimana siswa dapat memperoleh pemahaman yang lebih baik tentang geometri.
Effect of firm specific and macroeconomic factors on profitability of Nepalese insurance companies
Authors: Khadka Sujan 
Published: April 2023

This study examines the effect of firm specific and macroeconomic factors on profitability of Nepalese insurance companies. Return on asset and return on equity are selected as the dependent variables. Similarly, firm size, liquidity, tangibility, dividend per share; premium growth, inflation, gross domestic product and money supply are selected as the independent variables. This study is based on secondary data of 16 insurance companies with 124 observations for the study period from 2013/14 to 2020/21. The data were collected from collected from reports published by the insurance board of Nepal, annual reports of respective insurance companies and World Bank database. The correlation coefficients and regression models are estimated to test the significance and importance of firm specific and macroeconomic factors on the profitability of Nepalese insurance companies.
The result showed that firm size have the negative impact on return on assets and return on equity. It indicates that the increase in the firm size leads to decrease the return on assets and return on equity. Similarly, the studies showed that liquidity rate have also the negative impact on return on assets and return on equity. It indicates that the increase in the liquidity leads to decrease the return on assets and return on equity. On the other hand, the studies found that tangibility have the positive impact on return on assets and return on equity. It shows that the increase in the tangibility leads to increase the return on assets and return on equity. Likewise, the studies found that dividend per share have the positive impact on return on assets and return on equity. It shows that the increase in the dividend per share leads to increase the return on assets and return on equity. Similarly, the studies found that premium growth have the positive impact on return on assets and return on equity. It shows that the increase in the premium growth leads to increase the return on assets and return on equity. Furthermore, gross domestic products have the positive impact on return on assets and return on equity. It means that increase in the gross domestic product have leads to increase the return on assets and return on equity. Moreover, inflation has the negative impact on return on assets and return on equity. It shows that increase in the inflation leads to decrease the return on assets and return on equity. Likewise, money supply has the negative impact on return on assets and return on equity. It indicates that the increase in the money supply leads to decrease the return on assets and return on equity of Nepalese insurance companies.
Study of human and monkey conflict in Dhankuta Municipality, Dhankuta, Province 1, Nepal
Authors: Adhikari Ram Chandra 
Published: April 2023

The study was launched in 2017 in Dhankuta Municipality, mid hill region of Nepal. The area has been suffered from monkeys' activities for many years but detail study and management plan of overpopulated monkey have not been made yet. Questionnaire, focus group discussion, key informants survey, direct observation methods were used for collection of data. 45% of respondents observed monkeys group twice a day in their area and 40% of monkeys were from Salleri forest. The finding showed that human threated the monkey and monkey were also disturbing the human. Mostly (71%) was found threats to the monkey from human side. From the side of monkey major problem was crop loss (66%). The maximum victim persons from monkey (40) were adult female. Mostly raided crop was maize (29%) followed by rice (18%). Most of the respondents (35%) revealed that annual loss was US dollar 100 to 150. For the deterrent 52% used catapult. It was found that 38% respondents had left the fallow land due the negative impact of monkey. Most of the respondents (57%) opinioned that the monkeys of that area should be translocated to other places. Some (22%) suggested killing would be the best policy.
Comparative analysis of the impact of selected anesthesia methods on the cognitive function of patients undergoing ophthalmic surgery
Authors: Сакович В. М. , Дорофєєва Г. С. , Алексєєв В. П. , Алексєєва Олена , Драпак І. А. 
Published: April 2023

Background: Anesthesiologists should not only save patient’s life as a process, but also enable the patient to recover his/her social life after surgery, given increased longevity, high social activity throughout life, and increased use of technical equipment in everyday life. Purpose: To assess central nervous system (CNS) changes in patients undergoing penetrating keratoplasty in order to optimize the choice of anesthesia technique, while taking into account the impact of general anesthesia on postoperative cognitive functions. Material and Methods: We employed neuropsychological tests such as Mini-Mental State Examination (MMSE), Frontal Assessment Battery (FAB) and Luria’s test to examine the cognitive function of patients before surgery and 6 hours, 24 hours, 7 days and 21 days after surgery. Results: On the basis of comparative analysis of the impact of selected anesthesia methods on cognitive function of patients undergoing surgery (penetrating keratoplasty), we concluded that a combination of regional anesthesia (pterygopalatine fossa blockade), dexmedetomidine infusion (0.3 µg/kg) and general analgesia (maintenance in an oxygen/sevoflurane mixture) with exclusion of Sibazon 0.5% had the shortest and the least profound impact on the cognitive function. Conclusion: On the basis of comparative analysis of the impact of selected anesthesia methods on cognitive function of patients undergoing penetrating keratoplasty, we concluded that a combination of regional anesthesia (pterygopalatine fossa blockade), dexmedetomidine infusion (0.3 µg/kg) and general analgesia (maintenance in an oxygen/sevoflurane mixture) with removal of Sibazon 0.5% from premedication and presence of a reduced amount of fentanyl used during anesthesia had the shortest (with a mean duration of a day) and the least profound impact on cognitive state in patients undergoing ophthalmic surgery.
Second Language Students' Revision During Translating Medical and Literary Texts: A Psycholinguistics Perspective
Authors: Swar Ahood , Mohsen Mohammed 
Published: April 2023

Introduction. Cognitive processes have been extensively examined in the literature of translation studies to identify what goes on in students’ minds when they translate from one language into another. Such investigations targeted translators’ pauses over different texts from their native language into a foreign language. However, identifying translators’ revisions of different types of text remains sufficiently unexplored in the translation studies literature.
Goals. This paper attempts to examine Arab students’ translation behaviors (self-revision or self-correction in particular) during the translation of a text from their second language (English) into their first language (Arabic) and vice versa. It also aims to reveal how revising a translated text is moderated by the variety of directionality and text type. To this end, 27 Arab native students were asked to translate two types of texts: literary and medical texts from English into Arabic and from Arabic into English over a keystroke logging program (Inputlog). Their behaviors were video-recorded using a video screenshot program. After translation, four students were invited to take a stimulated recall interview by viewing their behaviors in the video and were requested to verbalize what they were thinking of when they deleted and/or inserted text during translation assignments.
Results. The results from the quantitative analysis showed that text type and L1-L2 directionality have significant effects on students’ cognitive processes. In addition, qualitative analyses obtained from MAXQDA revealed that students' translators encountered difficulties in many areas such as creativity-demanding problems, lexical problems, comprehensibility problems, spelling problems (for only Arabic-English directionality), and syntactic problems.
Conclusion. Many cognitive process difficulties were identified which were related to psycholinguistics issues that need to be tackled in the translation studies.
Độ không nhập nhằng của ngôn ngữ và ứng dụng
Authors: Hân Nguyễn Đình , Thắng Đặng Quyết 
Published: April 2023

The classification of languages based on unambiguous product of words and codes contains a gap. Our work aims at investigations to fill up thegap. The classes of k-unambiguous languages is considered as extensions of codes, in which a code is kunambiguous for all k ≥ 0 , the unambiguous product can be used to define k-unambiguous languages with k ≤ 2. Given a regular language X, its unambiguous value k can be determined by an O(n2) time complexity algorithm, where n is the finite index of the syntactic congruence of X. The k-unambiguous languages with kis large enough, can be used in information encryption, and can provide us an encryption schemawith high enough security since their ambiguous characteristics.
Đề xuất thuật giải mã V-BLAST mới cho các hệ thống MIMO-OFDM
Authors: Hưng Đào Minh , Đức Nguyễn Văn , Khương Nguyễn Quốc , Trung Nguyễn Quốc , Nga Nguyễn Thu 
Published: April 2023

In this paper, we propose a new VBLAST (Vertical-Bell Labs Layered Space-Time) decoding algorithm for MIMO-OFDM (Multiple–Input Multiple-Output-Orthogonal Frequency Division Multiple-xing) system to improve the spectral efficiency of very high speed channels. The proposed algorithm considers the decision errors caused by error propagation and a linear signal detector using probabilistic data association. The results of calculations and simulations in terms of SER ratio indicates that the proposed scheme improves the system performance significantly compared to the proposed scheme in [4] (7 dB gain at SER = 10-2 for 4-QAM modulation) without increasing the complexity of computing.
Tüketicilerin Helal Gıdaya Yönelik Bilgi, Tutum ve Tercihleri: Gözlemsel Tanımlayıcı Bir Çalışma
Authors: İçer Mehmet Arif , Gezmen Karadağ Makbule 
Published: April 2023

Amaç: Müslüman nüfusundaki hızlı büyüme, artan farkındalık ve gayrimüslimler arasında helal gıda tüketimine yönelik artan popülarite helal gıda pazarının giderek daha fazla önem kazanan bir pazar haline gelmesini sağlamıştır. Bu araştırmada Türkiye’deki yetişkin tüketicilerin helal gıdaya yönelik bilgi, tutum ve tercihlerinin değerlendirilmesi amaçlanmaktadır.
Bireyler ve Yöntem: Bu çalışma yaşları 18-65 yıl arasında değişen 296 erkek ve 297 kadın olmak üzere toplam 593 birey üzerinde yürütülmüştür. Çalışmada anket formuyla katılımcılara ait tanımlayıcı bilgiler ve helal gıda ile ilgili bilgi, tutum ve tercihlerinin ölçülmesine yönelik bilgiler sorgulanmıştır.
Bulgular: Çalışmada Helal gıdanın tanımını doğru bilenlerin oranı kadın bireylerde erkeklerden daha yüksekken (erkek bireylerde %64.5, kadın bireylerde %75.4) (p<0.05), satın alınan ürünün helal olup olmadığına dikkat etme oranı ise erkek bireylerde daha yüksektir (p<0.05). Kadın bireylerde ve toplam katılımcılarda helal gıdanın tanımını doğru bilenlerin bilmeyenlere göre “İşlenmiş gıdalar helal gıda kapsamına girer mi?” sorusuna daha yüksek bir oranla evet yanıtını verdiği görülmektedir (p<0.05). Ayrıca, alınan ürünün helal gıda olmama endişesini en aza indirmek için erkek bireylerin en yüksek oranla (%32.8) bildiği yerden almayı tercih ettiği, kadın bireylerin ise en yüksek oranla (%33.7) ürünün içeriğini incelerim seçeneğini seçtiği görülmektedir (p<0.001).
Sonuç: Çalışmadan elde edilen sonuçlar, helal gıdanın tanımının doğru bilinmesinin helal gıda ile ilgili bilgi düzeyini etkilediği ve satın alım tercihini belirleyen faktörler içerisinde “Helal gıda” kavramının erkek cinsiyette daha önemli bir yere sahip olduğuna işaret etmektedir. Ayrıca, çalışma verileri kadın bireylerin helal gıda olmayan ürün tüketiminden kaçınmak için besin etiketlerine ve helal sertifikaya daha fazla dikkat etmiş olabileceklerini düşündürmektedir.
Analysis of the correlation between BMI and respiratory tract microbiota in acute exacerbation of COPD
Authors: Cao Yang , Chen Xiaolin , Shu Lei , Shi Lei , Wu Mingjing , Wang Xueli , Deng Kaili , Wei Jing , Yan Jiaxin , Feng Ganzhu 
Published: April 2023

ObjectiveTo investigate the distribution differences in the respiratory tract microbiota of AECOPD patients in different BMI groups and explore its guiding value for treatment.MethodsSputum samples of thirty-eight AECOPD patients were collected. The patients were divided into low, normal and high BMI group. The sputum microbiota was sequenced by 16S rRNA detection technology, and the distribution of sputum microbiota was compared. Rarefaction curve, α-diversity, principal coordinate analysis (PCoA) and measurement of sputum microbiota abundance in each group were performed and analyzed by bioinformatics methods.Results1. The rarefaction curve in each BMI group reached a plateau. No significant differences were observed in the OTU total number or α-diversity index of microbiota in each group. PCoA showed significant differences in the distance matrix of sputum microbiota between the three groups, which was calculated by the Binary Jaccard and the Bray Curtis algorithm. 2. At the phylum level, most of the microbiota were Proteobacteria, Bacteroidetes Firmicutes, Actinobacteria, and Fusobacteria. At the genus level, most were Streptococcus, Prevotella, Haemophilus, Neisseria and Bacteroides. 3. At the phylum level, the abundance of Proteobacteria in the low group was significantly higher than that in normal and high BMI groups, the abundances of Firmicutes in the low and normal groups were significantly lower than that in high BMI groups. At the genus level, the abundance of Haemophilus in the low group was significantly higher than that in high BMI group, and the abundances of Streptococcus in the low and normal BMI groups were significantly lower than that in the high BMI group.Conclusions1. The sputum microbiota of AECOPD patients in different BMI groups covered almost all microbiota, and BMI had no significant association with total number of respiratory tract microbiota or α-diversity in AECOPD patients. However, there was a significant difference in the PCoA between different BMI groups. 2. The microbiota structure of AECOPD patients differed in different BMI groups. Gram-negative bacteria (G-) in the respiratory tract of patients predominated in the low BMI group, while gram-positive bacteria (G+) predominated in the high BMI group.
Investigating cardiovascular risk in premenopausal women on oral contraceptives: Systematic review with meta-analysis
Authors: Fabunmi Oyesanmi A. , Dludla Phiwayinkosi V. , Nkambule Bongani B. 
Published: April 2023

BackgroundThe use of oral contraceptives (OCs) is associated with an increased risk of cardiovascular events such as arterial and venous thrombosis (VTE). Cardiovascular diseases (CVDs) are the leading cause of death worldwide, with low- and middle-income nations accounting for over three-quarter of CVD deaths. The aim of this systematic review is to provide a comprehensive synthesis of the available evidence on the link between OC use and CVD risk in premenopausal women and to further assess the role of geographic disparities in the reported prevalence of CVD risk in women on OCs.MethodsA comprehensive search of databases such as MEDLINE, Academic Search Complete, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Health Source: Nursing/Academic Edition was conducted, right from the inception to the present, by using the EBSCOhost search engine. The Cochrane Central Register of Clinical trials (CENTRAL) was also searched to augment relevant sources of information. OpenGrey, which is a repository of information providing open access to bibliographical references, was searched and the reference list of the selected studies was also scanned. The potential risk of bias of the included studies was assessed using the modified Downs and Black checklist. Data analysis was performed using the Review Manager (RevMan) version 5.3.ResultsWe included 25 studies that comprised 3,245 participants, of which 1,605 (49.5%) are OC users, while 1,640 (50.5%) are non-OC users. A total of 15 studies were included for meta-analysis, and the overall pooled estimates suggested a significant increase in the traditional cardiovascular risk variables [standardized mean difference (SMD) = 0.73, (0.46, 0.99) (Z = 5.41, p &lt; 0.001)] and little to no difference in endothelial activation among OC users when compared with non-OC users [SMD = −0.11, (−0.81, 0.60) (Z = 0.30, p = 0.76)]. Europe [SMD = 0.03, (−0.21, 0.27), (Z = 0.25 p = 0.88)] had the least effect size, while North America had the highest effect size [SMD = 1.86, (−0.31, 4.04), (Z = 1.68 p = 0.09)] for CVD risk in OC users when compared with non-OC users.ConclusionThe use of OCs suggests a significant increase in the prevalence of traditional cardiovascular risk variables with little to no difference in the risk of endothelial dysfunction when compared with non-OC users, and the magnitude of CVD risks varies across different geographical regions.Registration and protocolThis systematic review was registered in the international prospective register of systematic reviews (PROSPERO) under the registration number: CRD42020216169.