bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of the motion of incompressible gas in a vortex heat generator
Authors:   Ukrainian State University of Chemical Technology, Yariz V. , Nikolsky V. ,   Ukrainian State University of Chemical Technology, Gnatko E. ,   Ukrainian State University of Chemical Technology, Palagnyuk A. ,   Ukrainian State University of Chemical Technology, Lobodenko А. ,   Ukrainian State University of Chemical Technology, Ved V. ,   Ukrainian State University of Chemical Technology, Pavlyus S. ,   National Metallurgical Academy of Ukraine
Published: July 2021

The article presents the results of the performed analytical and experimental studies of the hydrodynamics of the translationalrotational motion of a viscous incompressible gas flow in the working space of a vortex heat generator of variable geometry, analytically determined the dependences of the effect of device performance, confuser opening angles, confuser channel width on the hydrodynamic parameters of the device and, as a consequence, its energy efficiency. The degree of energy efficiency of the swirler screw for the operation of a vortex heat generator at various loads on the working path has been experimentally estimated, according to the Euler number EUc. It has been proven that the energy efficiency of its operation is on average 35% higher when the swirler screw is installed. The influence of the geometry of the nozzle on the axial symmetry and smoothness of the flow of incompressible gas in the vortex chamber is investigated. It was found that the specified indicator is most satisfactory for a nozzle with a rectangular cross-section. The distribution of the temperature field of a moving incompressible gas along the height of the vortex chamber is investigated depending on the taper angle. The distribution of angular velocities along the axis of the flow swirler is investigated at various values of productivity. It was found that the angular velocity decreases according to the law of potential fluid flow. A mathematical model has been developed to optimize the operating modes and parameters of the vortex heat generator. A software block was built based on the mathematical package MathCAD version 11 for the implementation of the developed mathematical model. An optimal design of a vortex heat generator with a variable geometry of the working space has been developed, which has been tested in laboratory conditions. Laboratory studies have proven its high energy efficiency at the level of modern standards and the feasibility of using the device for heating buildings and structures in industry and the domestic sector. Keywords: incompressible gas, hydrodynamics of an incompressible gas flow, vortex motion, mathematical model, equation of motion, continuity equation, vortex heat generator, thermal energy, cavitation, turbulence, vortex zone, MathCAD package.
Választójog, választási rendszerek és népszavazások a közjog és a politika határán
Authors: Horváth Attila
Published: July 2021

A nyolc tanulmányt felölelő kötet a választójog, a választási rendszerek és a népszavazás különböző szegmenseit tárgyalja, a magyar szabályozáson kívül a német és a szlovák választási rendszert is érintve. A nagyobb részben jogtudományi, kisebb részben pedig politikatudományi szempontú elemzések nagy hangsúlyt fektetnek a témakörrel kapcsolatos hazai és nemzetközi tapasztalatok, szabályozási modellek, kihívások és dilemmák bemutatására.
Az Alaptörvény jelentősége Magyarország szuverenitásának védelmében
Authors: Varga Zs. András
Published: July 2021

A 21. század elején a vesztfáliai békére visszavezethető szuverenitáson alapuló világrendet a globalizáció néven összefoglalt komoly és hosszú kihívás éri. Ez nem kizárólag politikaelméleti kérdés, hanem legalább ennyire alkotmányjogi is. Az állam által gyakorolt hatalom és a hatalom gyakorlásának módja az Európai Unió keretei között is bonyolult. Lényeges ezért, hogy Magyarország ott, ahol hatalma van, vagyis saját állami keretei között hangsúlyozza, hogy nem azért van magyar alkotmányosság, mert azt egy, az akaratából létrejött, vagy legalábbis hozzájárulásával működő nemzetközi intézmény elismeri, hanem azért van magyar alkotmányosság, mert korábban is volt. Állami szuverenitás nélkül csak intézményi autoritás marad, az alkotmány és az alkotmányosság elenyészik. Ez ellen szolgál erős eszközül az Alaptörvény. Az alkotmányos identitás, a mai alkotmányosság normatívösszekapcsolása a Magyarország állami létét végigkísérő történeti alkotmányossággal és az alkotmányos állami folytonosságot megtestesítő Szent Koronával olyan eszközök, amelyek alkalmasak a szuverenitás védelmére.
LOSER LIKE ISRAEL GALVÁN: EPIC FAILS IN LA FIESTA
Authors:   The Graduate Center, Valtueña Daniel
Published: July 2021

This article aims to update generally assumed readings on Spanish bailaor Israel Galván regarding solitude (Didi-Huberman) and silence (Frayssinet Savy) by interrogating his show La fiesta (2017). La fiesta contributes to a revaluation of his solo career as a flamenco dancer and deliberately proposes a non-normative flamenco universe that searches for alternative modes of dancing. Moved by notions such as failure, forgetfulness, and stupidity (Halberstam) I will demonstrate how celebratory spaces and times such as the one evoked by Galván facilitate actions and movements outside of the limits normativity im-poses.
EL DESENCANTO DE LOS COMUNITARIO. TRES MODOS DE DANZA EN NIETZSCHE
Authors:   Facultad de Filosofía, UCM, Mateos de Manuel Victoria
Published: July 2021

En este artículo propongo una lectura de los usos de la danza en Nietzsche como un síntoma del progresivo desencanto con lo comu-nitario y lo político en este autor. En concreto, a través de la metáfora de la danza en Nietzsche, voy a plantear tres modos de la experiencia dionisíaca, los cuales discurren desde la comprensión del éxtasis como celebración de lo comunitario hasta la soledad radical de la sabiduría dionisíaca. En primer lugar, siguiendo le lectura de Sloterdijk, nos en-contramos con la interpretación socialista del inicial dionisismo nietzs-cheano en El nacimiento de la tragedia: la danza permite «la alianza del hombre con el hombre» y «lo revela miembro de una comunidad supe-rior». En segundo lugar, la inicial esperanza política de lo dionisíaco se transforma en una pequeña comunidad apolítica en el capítulo «La can-ción del baile» de Así habló Zaratustra a través de la imagen del grupo de bailarinas en el bosque. En tercer lugar, también en Así habló Zaratustra, aparece la metáfora de la «estrella danzarina», la cual nos habla de una suerte de soledad cósmica y una experiencia dionisíaca disidente.
Development of technology for producing base oil and environmentally friendly petroleum plasticizer
Authors:   JSC «GAZPROMNEFT-MNPZ», Zuber V. I. , Nigmatullin V. R. ,   Ufa State Petroleum Technical University, Nigmatullin R. G. ,   Ufa State Aviation Technical University, Perkhutkin D. A. ,   PJSC ANC Bashneft-Ufaneftekhim
Published: July 2021

The article relates to the field of chemical technology and can be used in oil refining. The article reveals a method for producing base oils with a low sulfur content, environmentally friendly aromatic fillers and plasticizers of rubber and rubber, including selective purification of oil fractions of oil with a selective solvent, separation of the extract and raffinate solutions of the first stage, while the extract solution of the first stage is cooled, followed by separation in the settling tank of the pseudo-raffinate solution of the first stage, a raffinate solution of the first stage after solvent regeneration is dewaxed and oxidized, followed by extraction of the oxidized dewaxed oil to obtain raffinate and extract solutions of the second stage, from the raffinate solution of the second stage after solvent regeneration and subsequent adsorption or hydrotreatment, a base oil of group II with a low sulfur content is obtained, while the extract solution of the second stage is mixed with a pseudo-paraffinate solution of the first stage to obtain after solvent regeneration, an environmentally friendly aromatic filler and plasticizer of rubber and rubber with a polyaromatic hydrocarbon content of less than 2.9%.
GENERAL TRENDS IN THE DEVELOPMENT OF THE TOURISM SECTOR IN UKRAINE BEFORE AND AFTER COVID 19
Authors:   SI “Institute of Regional Research named after M.I. Dolishniy of National Academy of Sciences of Ukraine”, Ноryn Halyna
Published: July 2021

The article deals with the development of the tourism sector in Ukraine. According to the 2026 Strategy for the Development of Tourism and Resorts in Ukraine is determined that the sphere of tourism is associated with the activities of more than 50 industries, and its development diversification of the national economy, preservation and development of cultural potential. Tourism flown into Ukraine is estimated by the World Economic Forum. They estimated the total income from tourism in Ukraine in 2019 at 1.3 billion US dollars. Tourist flows in Ukraine is also observed by statistics of Ukraine. Analysis of statistics shows a significant increase in sales in summer and a decrease in sales in the off-season and winter. Tourism market in Ukraine during COVID-19 is researched, too. According to the State Statistics Service, value of sales by travel agencies in the second quarter of 2020 decreased by 95.8% from the recovery to the second quarter of 2019 and hotel services decreased by 84.1%.
FUNCTIONS OF MANAGEMENT ACCOUNTING
Authors:   Economics and Technology Institute Robert Elworthy, Butkevich Oksana
Published: July 2021

One of the most important tasks of management accounting is to provide quality and efficient accounting information to users. The effectiveness of management accounting is manifested through the implementation of its functions, so it is relevant and urgent to consider them. The aim of the article is to study the composition, number and content of the functions of management accounting. The research methodology was based on general scientific methods of cognition like historical, logical, systemic methods, induction, deduction, analysis, as well as the methods of classification and grouping. According to the results of the research, it is found that currently there is no unified, generally accepted approach to the composition and number of the functions of management accounting (on average, there are distinguished five functions). Almost all researchers indicate information and control functions; analytical, predictive and communication functions are also present in most of the authors' papers analyzed. In some works, there are not quite appropriate combinations of two separate functions in one, and also there are similar titles of one and the same function of management accounting. There is a separation of rather narrow, specific functions, which are inherent only in certain management processes. We have summarized 32 different functions of management accounting, analyzed their number and composition, covered more than 50 authorial meanings for each of them. It has been found that researchers determine the different composition and essence of the functions depending on the direction of the study, its object and the specifics of the industry. It is quite logical that most of the various interpretations are given to the content of the information function of management accounting. According to the Conceptual Framework for Management Accounting developed by the International Federation of Accountants, the following functions have only one definition: analytical (evaluation), control and analytical, scientific and cognitive, new scientific and cognitive, motivation, organization, organizational and communication, planning and control, prognostic, reputational and the functions of management accounting. Prospects for further research are to consider the relationship between the functions of management accounting and management functions and to establish the quality and features of the manifestation of the functions of management accounting under the influence of industry characteristics of enterprises.
METHODOLOGY OF EVALUATION OF COMPETITIVENESS OF FOOD PRODUCTS
Authors:   Lviv University of Trade and Economics, Zlydnyk Marta
Published: July 2021

The article provides a step-by-step description of the methodology for assessing the competitiveness of products and identifies specific stages. Having carried out a detailed description of a large number of existing methodologies for assessing the competitiveness of products, a general scheme for determining a comprehensive indicator of the level of its competitiveness. Particular attention is paid to the definition of methods for assessing the level of competitiveness of products, method and form of presentation of the results of its evaluation. Substantiation of methods, means and accuracy of quantitative assessment of competitiveness indicators is of fundamental importance, as different approaches can be applied to the definition of different groups of competitiveness indicators. The selected methods of determination determine the use of appropriate means, and as a consequence, a certain degree of accuracy. The following main methods of assessing the level of product competitiveness are characterized as: methods based on the analysis of comparative and relative advantages, methods based on the theory of equilibrium of the firm and industry; methods based on the theory of effective competition; methods based on the theory of product quality; matrix methods of competitiveness assessment; index methods of competitiveness assessment; complex methods (including integrated); a method based on the theory of the multiplier; method of determining the position in the competition in terms of strategic potential of the enterprise and the method of neural networks. Based on the analysis, the author summarizes and forms a comprehensive table of various methods of assessing competitiveness, identifies their advantages and disadvantages. Thus, for each case it is necessary to reasonably approach the choice of a method of assessing the competitiveness of the enterprise and its products, taking into account their advantages and disadvantages, as well as the cost of analysis and speed of obtaining the result. In this regard, there is an urgent need to develop methodological aspects of assessing the competitiveness of state enterprises and their products, which operate in conditions of difficulty in obtaining reliable information about the competitor, taking into account the specifics of economic development.
STATE REGULATION OF AGRICULTURE IN UKRAINE
Authors:   Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv, Salamin Oksana
Published: July 2021

Problems of state regulation of agriculture in Ukraine are analyzed. It is shown that all problems will be solved automatically in the initial stages of agricultural reform on a market basis. It was believed that market levers operate automatically. Without the established agricultural market and its infrastructure, the liberalization of economic activity has only exacerbated the problems. In the following periods, regulatory acts were aimed at solving certain problems without defining strategic goals for agricultural development. The efforts of state agricultural management bodies are aimed at bringing regulatory policy closer to the model used in the European Union. Similar approaches are often copied without regard for the state of agriculture in Ukraine and the level of market relations. A feature of agriculture in Ukraine is the inadequate level of infrastructure of the agricultural market. Because of this, prices for agricultural products are not generated by the market, but they are formed under the monopoly influence of certain structures. Prices are very variable. It is very difficult for manufacturers to adapt to such prices. In such conditions, especially large business entities are developing rapidly. Their activities are aimed at bringing products to foreign markets where prices are more stable. State farm support programs do not provide the necessary results. There are not natural processes of transformation personal farms into commodity farms. It is proposed that the state regulatory policy can be aimed at creating self-regulatory economic systems in which prices would be formed to all participants in market relations without direct state influence. It is acceptable to organize product processing and branded trade in sales cooperatives. The need to expand the functions of wholesale markets for agricultural products is substantiated. It is expedient to direct the funds of state support for wholesale markets for agricultural products to establish branches of these markets. They would provide transport services to small producers, store products, at the direction of the owners, organize auctions. This will ensure the overcoming of isolation from market relations of small businesses, their production of competitive products.
ІСТОРИЧНИЙ ГЕНЕЗИС СТАНОВЛЕННЯ І РОЗВИТКУ ПРОФЕСІЇ «МЕДИЧНИЙ ПРЕДСТАВНИК» В УКРАЇНІ
Authors: Білоусова Наталя
Published: July 2021

Актуальність дослідження зумовлена необхідністю врегулювання на державному рівні професійної підготовки медичних представників фармацевтичних компаній як ключових фігур вітчизняного фармацевтичного ринку у системі формальної, неформальної та інформальної освіти.

Мета: на основі вивчення історії становлення і розвитку професії «медичний представник» охарактеризувати особливості розвитку професійної підготовки даних фахівців в Україні.

Методи: загальнонаукові (аналіз, синтез, порівняння, узагальнення) – для вивчення наукових джерел; конкретно-науковий (порівняльно-історичний) – для виявлення особливостей становлення професії медичного представника на українському фармацевтичному ринку;

Результати: досліджено історичний генезис проблеми інформування в галузі фармації; обґрунтовано умови, що сприяли розвитку в Україні професії «медичний представник»; охарактеризовано професійні функції медичних представників; визначено особливості розвитку їх професійної підготовки в системі формальної, неформальної та інформальної освіти України.

Висновки: розвиток професії «медичний представник» розпочався у 90-х роках минулого століття і пов’язаний із становленням фармацевтичного ринку лікарських засобів і препаратів; професійними функціями медичних представників є інформаційна, презентаційна і просвітницька; ці функції спрямовані на виведення на вітчизняний фармацевтичний ринок брендованих дженериків; в Україні підготовка медичних представників здійснюється лише фармацевтичними компаніями і представництвами; на відміну від світової практики, вітчизняні асоціації фармацевтичних (медичних) працівників залишаються осторонь від професійної підготовки медичних представників; професія «медичний представник» в Україні дотепер нелегітимізована; нагальною є потреба вдосконалення професійної підготовки медичних представників фармацевтичних компаній через розроблення і впровадження освітньо-професійних програм на другому (магістерському) рівні вищої освіти та підвищення кваліфікації в системі післядипломної освіти.
Preoperative embolization of Intracranial meningioma with Histoacryl through Middle meningeal artery: The effect on intraoperative blood loss and complications related to the procedures.
Authors: Koh Seng Hong , Abd Kadir Khairul Azmi , Mohamed Sani Fadhli
Published: July 2021

Introduction: This study aims to evaluate the effectiveness of preoperative embolization of intracranial meningioma using N-Butyl-2-Cyanoacrylate (Histoacryl) in reducing intraoperative blood loss and also to assess the complications related to this procedure. Materials and methods: This is a single-centered retrospective cross-sectional study of 106 patients with histologically proven meningioma underwent open surgical resection in University Malaya Medical Centre (UMMC) from 1st of January 2010 till 31st of May 2020. Out of the 106 samples, 29 of them underwent Histoacryl embolization prior to the surgery and 77 of them were subjected to surgery without preoperative embolization. The demographic data, mean comparison and correlation testing were performed using Statistical Package for the Social Sciences(SPSS).Result: The majority of patients were female gender (68%). Most of the tumour were WHO grade 1 meningioma (86%). 48% of patients in the embolized group were transfused. Female gender had a longer duration of operation (280min vs 234min) and required higher amount of blood transfusion (1.3pint vs 0.6pint) compared to male gender (P<0.05). No statistical significance was found in the mean intraoperative blood loss, duration of operation and amount of blood transfused between the embolized and non-embolized group (P>0.05). No statistical difference was observed in the mean intraoperative blood loss, duration of operation and amount of blood transfused in patient embolized with Histoacryl in comparison with non-Histoacryl group (P>0.05). No post-embolization complication encountered in our centre. The meningo-opthalmic branch is seen in 4% of our study population.Conclusion: Preoperative embolization of meningioma is a safe procedure with careful patient selection. No significant difference is observed in the intraoperative blood loss, duration of operation and amount of blood transfused between the embolized and the non-embolized group. However, we find that female has a significant longer duration of operation and requires higher amount of blood transfusion.
Physical and chemical characteristics of two wetlands in Lake Danao Natural Park, Ormoc City
Authors: Alfante Nadia , Patindol Teofanes
Published: July 2021

The study was conducted to characterize the wetlands located at Sitio Quinto Limbo and Tasakan in Lake Danao Natural Park, Ormoc City based on some physicochemical parameters.
The two wetlands are generally shallow. Salinity ranged from 0.3 to 0.5 ppt which is characteristic of an oligohaline wetland. Sediment and water were slightly acidic. Concentrations of ammonium ions were lower than the normal value. Levels of nitrate and phosphate ions exceeded the normal value of 1mg/L and 0.025 mg/L, respectively.
Lead ion concentrations were generally within the normal range (10-100 mg/kg). Mean cadmium ion concentration was normal (0.01-1.0 mg/kg) although in some sites concentrations beyond the normal range were observed.
Based on the findings, it is recommended that conservation program be urgently implemented in the study area to ensure the conservation of the wetlands and their resources.
AN INVENTORY OF TOMATO VARIETIES CULTIVATED IN KADAWA AREA, KANO STATE
Authors: Baju Abubakar Ibrahim , Yusuf Shehu
Published: July 2021

The study is on the inventory of the tomato varieties cultivated in Kadawa area of Kano State from (1997-2017) as well as to identify the current most preferred variety by farmers and the reason for that. A survey design method was employed using questionnaire as the research instrument. About two hundred and eighty (280) respondents were selected from nine hundred and twenty-five (925) farmers using purposive sampling. The data collected were analyzed using frequency and percentage table. The result revealed that about 24 different tomato varieties were identified. Griffaton happened to be the most preferred variety by farmers of Kadawa. In Kadawa one out of every three farmers is cultivating Griffaton. This is because of its qualities that include high yield, durability, attractive sizes among others. All the tomato varieties the research identified to be cultivated in Kadawa are imported from abroad except technisem. This can be seen as a challenge to the home industries producing tomato seeds to be producing the product that can compete with those imported to be well accepted by farmers within and outside the nation. The paper advised the stakeholders to put more effort into providing qualitative and acceptable indigenous tomato varieties to avoid further extinction.
FETUSES LOSSES IN SMALL RUMINANTS: A CASE STUDY OF HADEJIA EMIRATE COUNCIL OF JIGAWA STATE.
Authors: Nasir M. , Aliyu A. M. , Bature I.
Published: July 2021

A study was conducted to assess the extent of foetal losses from small ruminants and possible factors responsible for slaughtering female animals in semi-arid abattoirs of Hadejia and Malam-Madori, Jigawa State. The study was carried out using structured questionnaire administered to 160 respondents in the abattoirs for a period of three months (June-August, 2013). Specify the statistical tool you used to analyzed your results here. The results revealed that youths aged less than 25 (35.71%) and 36-45 (37.29%) years were the main source of labour in Hadejia and Malam-Madori.The respondents were mostly engaged in evisceration and skinning (75.71% and 82.86%) in the abattoirs. Majority (77.15% and 72.00%) of the respondents in both study areas were males, mostly (68.00% and 60.00%) married, few (12.00% and 9.33%) had tertiary education, while many (26.67% and 32.00%) had acquired secondary education. Small ruminant foetuses recovered from 6 to 10 per day were 65.71% and 52.85% which vary with season. It was concluded that there was a cause for concern on loss of fetuses especially among small ruminants. It is therefore suggested that awareness should be created among livestock rearers/farmers and butchers on the implication of slaughtering of pregnant animals and its consequence on the future of small ruminant’s population since increase in population of any livestock species is based on reproduction. Thus, legislation prohibiting indiscriminate slaughter of pregnant or inbred female animals should be enforced or enacted as this has far reaching negative impact on reproduction/production and revenue generation in
The Mapping Of Investor Perception On The High Financial Reporting Quality
Authors: Siladjaja Muljanto , Anwar Yuli
Published: July 2021

This research mapped investor perception on high accounting information quality, particularly the accurate prediction model for future returns. The high financial reporting quality indicates the company's prospective improvement in the future under the right management. This positively affects market price fluctuation, where the investor has minimum distortion on accounting information and low risk. The obedience to accounting standards and tax regulation illustrates actual earnings in reducing agency cost's volatile movement. This study used questionnaires to gather information. The respondents were related parties with dominant influence in investment, specifically 384 samples. Through the structural equation model, the mapping of earnings quality, future market value, and dividend policy played a critical role in minimizing misleading information and improving accounting information quality. The high financial reporting quality indicates the managements' obedience in maximum implementation of regulations with continuous improvements. In this regard, the dividend policy has significantly contributed to the improvement of the earnings quality. The Decision Tree Model was used in mapping investor perception on earnings quality to estimate the high probability of a long or short position for their maximum utility. When the dividend policy is used as a mandatory indirect obligation, the management should provide high accounting information quality.
The effect of insurance premiums, claims, underwriting results, on profitability with a risk-based minimum capital ratio (RBMC) as an intervening variable in general insurance companies
Authors: Alamsyah Richad
Published: July 2021

This study aims to analyze factors that effect profitability (ROA) with insurance premium, claim and underwriting result as independent variabel and risk based capital ratio (MMBR) as an intervening variable on insurance companieswich operate in Indonesia from year 2011-2015. The sample selection was done by using purposive sampling method and based on predetermined criteria, then got sample which amounted to 72 companies. The data in this study was secondary data. Data processing is done by statistical analysis technique that is multiple linear regression analysis and sobel method for intervening test.The results of this study indicate that (1) Insurance premium has no effect on MMBR ratio, (2) claim insurance  has a negative effect on MMBR ratio, (3) Underwriting result has positive effect on MMBR ratio, (4) Insurance premium has positive effect on profitability, (5) claim insurance has a negative effect on profitability, (6) underwriting result has positive effect on profitability, (7) MMBR ratio has positive effect on profitability, (8) premium insurance, has no indirect effect on profitability through MMBR ratio. (9) claim insurance has no indirect effect on profitability through MMBR ratio, (10) underwriting result has no indirect effect on profitability through MMBR ratio.
城市地籍测绘与不动产测绘中相关问题研究
Authors: 张 萍
Published: July 2021

在当前时期，国内城市的发展速度持续加快，广大群众的物质生活水平有明显的提高，为了保证社会能够真正保持可持续发展，必须要将城市规划做到位。若想使得城市规划工作能够顺利展开，地籍测绘、不动产测绘是不可忽视的，并要完成资料收集、分析，确保能够对城市规划能够起到指导作用，使得城市建设可以语序进行。文章对城市地籍测绘、不动产测绘工作中出现的问题展开深入探析。
建筑工程造价预结算审核工作的要点研究
Authors: 卜 校毅
Published: July 2021

随着我国经济快速发展，建筑工程发展速度不断提升，建筑工程造价预结算审核工作也被建筑行业重视起来。基于此，为了可以合理的确定工程的造价，就应该重视预结算审核工作，造价管理人员应该全面了解并掌握审核范畴和工作内容，为了确保建筑工程质量，提高社会经济效益，文章对于工程造价审核工作难点和要点进行研究。
掺杂对PZT陶瓷性能的影响
Authors: 周 丽萍 , 耿 启壮 , 赵 鑫宇 , 陈 文婧 , 张 杨*
Published: July 2021

在功能陶瓷的队伍中，压电陶瓷是非常重要的一类成员，应用于工业、军事、科技、医疗等领域。文中从改性机理开始讨论，叙述了不同掺杂元素和掺杂位置对PZT陶瓷压电、铁电性能等性能的影响，并对其发展方向进行了展望。
Role of neurosurgeon in the management of COVID 19 patients
Authors: Chief Editor in
Published: July 2021

Abstract not available
Bang.J Neurosurgery 2021; 10(2): 135
Endoscopic Endonasal Pituitary Surgery: Outcome analysis of 32 cases
Authors: Islam Md Rafiqul , Ahmed Monsur , Hasan Md Rashidul , Mehbub Hasan , Ashfaq Musannah
Published: July 2021

Introduction: Microsurgical trans-sphenoidal surgery for pituitary tumors has been standard treatment for nearly of century and was established by Harvey Cushing in the early twentieth century. Today, endoscopy is increasingly accepted in the treatment of pituitary lesions. In this article we analysed the surgical technique and outcome of 32 patients retrospectively with pituitary lesions treated with endoscopic endonasal trans-sphenoidal approach.
Material & Methods: Between January 2016 to July 2020, 32 patients (22 female and 10 male) with pituitary tumors were operated using endoscopic endonasal transsphenoidal procedure without any nasal speculum. Post-operative nasal packing given in both nostril in all cases. The follow-up period ranged from 3 to 24 months.
Results: Among the 32 patients gross total tumor removal was achieved in 23 cases (71.87%), subtotal removal done in 9 cases (28.13%). Post-operative discomfort was minimal and hospitalization was 7–10 days. 10 patients developed post-operative transient diabetes insipidus, among them persisting DI occur 2 patients for further 3 months. No patient died in our series within follow up period.
Conclusion: Endoscopic endonasal trans-sphenoidal approach for removing pituitary lesions is a form of minimally invasive skull base surgery with excellent post-operative results.
Bang. J Neurosurgery 2021; 10(2): 185-191
Cranioplasty with Subcutaneously Preserved versus Cryopreserved Autologous bone flaps after Decompressive Craniectomy- A Comparative Study of 40 Cases
Authors: Khalil Md Ibrahim , Farazi Md Mohsin Ali , Haque Md Fazlul , Sorowar Moutusi , Sheikh Md Sayedur Rahman , Nurjahan Kazi
Published: July 2021

Background: After decompressive craniectomy for acute brain swelling, bone flaps need to be stored in a sterile fashion until cranioplasty. We can preserve autologous bone flap as a freeze-preserved state or within abdominal subcutaneous tissue. The aim of this study is to compare the cryopreservation with subcutaneous abdominal preservation regarding the effectiveness and safety.
Methods:This is an interventional study. The clinical data of 40 patients underwent decompressive craniectomy and subsequent cranioplasty with autologous bone flaps in Neurosurgery Department of Shaheed Shiek Abu Naser Specialized Hospital and others private Medical Colleges in Khulna from Jan 2018 –December2019.20 patients under cranioplasty using autologous bone stored in ultra low freezer.. Another 20 patients cranioplasty with bone flap preserved in subcutaneous abdominal pocket. The analysis included the rate of complications, bone resorption, and reoperation to compare between SP group and CP group.
Results: The mean age was found 35.10(±13.34) years in subcutaneous preserved group and 39.90(±16.40) years in cryopreservation group with male predominance was observed in both groups.The rate of complications occurred in 4 (20%) in the SP group and3 (15%) in the CP group( P =0.677). The rate of bone resorption in SP group was 5.0% and CP group was15.0% (P=0.292). Reoperation in subcutaneous preservation group was 2(10.0%) and in cryopreservation group was 3(15%). The difference was not statistically significant between two groups (p = 0.633).
Conclusion: SP and CP both might be effective and safe methods for the storage of bone flaps for cranioplasty. There were no significant difference in complications, bone resorption , reoperation among two groups. However, identifying of the method that gives better results might depend on the individual surgeons preference and available equipment.
Bang. J Neurosurgery 2021; 10(2): 201-205
Implementation of Rainwater in Preparatory Processes as well as Dyeing of Knitted Cotton Fabric and Compare the Effects with Ground Water
Authors: Alom Md Samiul , Badhon Farjana , Halder Shompa Rani , Saha Tonmoy
Published: July 2021

Textile industries are very much intensive to water. A large amount of water is consumed every day during various textile processes and one of the main sources of this water is groundwater. This project aimed to work with rainwater which can be an alternative source of groundwater. In this project, the quality of rainwater was evaluated first and matched with the standard. From different tests such as turbidity, water hardness, amount of dissolved solids, and iron content, we found that the rainwater achieved the standard level of dye house water supply. After that, different wet preparatory processes, as well as dyeing of cotton fabric were carried out using rainwater. After completion of each process, evaluation was carried out such as weight loss percentage and absorbency for scouring, whiteness index for bleaching, and colour fastness tests of dyed fabric. The results were excellent compared with conventionally groundwater treated fabric.

Chemical Engineering Research Bulletin 21(2020) 54-59
Heavy Metal Contamination and Ecological Risk Assessment in the Soil of Tannery Industry at Savar
Authors: Tisha Sabiha Momtaz , Chowdhury Tasnia Rahman , Hossain Md Delwar
Published: July 2021

Heavy metal contamination in soil is considered a global crisis and its bulk proportion are in developing countries like Bangladesh. Five heavy metals such as Cd, Cr, Pb, Cu and Ni were investigated in the soil of Savar tannery industrial estate. The decreasing trend of metals was observed in soil as Cr>Cu>Ni>Pb>Cd. According to US EPA guideline, Cr was heavily polluted at the selected locations. Cu was highly polluted, whereas Cd and Pb were not polluted and Ni was moderately polluted. On the basis of Pearson’s correlation Cd-Pb, Cd-Cu, Cu-Ni, Ni-Cu, Ni-Pb were significantly correlated. From the pollution index, metal pollution of sediments was found in the order as Cr>Cu>Pb>Cd. Degree of contamination and modified degree of contamination were higher in the dumping zones. The geo-accumulation index for Cr showed moderate to extremely contaminated. Ecological risk arrayed in the order of Cr>Cu>Ni>Pb>Cd in the soil of study area. Geographic information system (GIS) was also used to map the spatial distribution of heavy metal contamination in the soil. This study recommended that continuous monitoring of heavy metal contamination should be directed to assess their risk in the soil of tannery industry at Savar.

Chemical Engineering Research Bulletin 21(2020) 106-113
Modeling and Predicting Stock Market Returns: A Case Study on Dhaka Stock Exchange of Bangladesh
Authors: Md Kamruzzaman - , Khudri Md Mohsan , Rahman Md Matiar
Published: July 2021

The available information pertaining to stocks should be entirely reflected in an efficient capital market with a view to aiding policy makers and investors in designing investment strategy. Hence, this paper investigates the time-series behavior of market returns of Dhaka Stock Exchange (DSE) of Bangladesh. This study also aims to find out the parsimonious model for forecasting monthly market returns of DSE more accurately. The monthly data of general index were collected from DSE for the period January 2002 to July 2013. Using Relative Difference method, monthly market returns were calculated. Autoregressive Integrated Moving Average (ARIMA) models were taken into account to model the behavior of stock market returns. Subsequently, based on Akaike Information Criterion and forecast errors, the findings of the study vouchsafe that ARIMA (2, 0, 2) can be employed to model and forecast market returns behavior of DSE efficiently. Finally, the monthly market returns were forecasted using the parsimonious model for the next 24 months and the predicted values fitted the observed values reasonably well.

Dhaka Univ. J. Sci. 65(2): 97-101, 2017 (July)
A Comparative Study on the Treatment Effect of Lipo-Prostagladin with Hypertension and Diabetes Mellitus in Sudden Sensorineural Hearing Loss Patients
Authors: Heo Hye-Jeong , Choi Chul-Hee , Kim Myung Gu , Hong Sung Hwa , Seo Ji Won
Published: July 2021

Background and Objectives Several drugs which can improve blood flow have been used as treatment options for sudden sensorineural hearing loss (SSNHL) based on the theory that improvement of perfusion into the inner ear will help restore hearing. Lipo-prostaglandin E1 (lipo-PGE1) is a well-known vasodilator that increases peripheral blood flow. The purpose of this study was to investigate the effect of lipo-PGE1 on the recovery of the SSNHL patients with hypertension or diabetes.Subjects and Method We retrospectively analyzed 801 patients who were diagnosed with SSNHL from January 2007 to December 2018. All patients were treated with 48 mg of methylprednisolone for 5 days; some patients received lipo-PGE1, depending on the attending physician. They were divided into four groups according to the presence or absence of hypertension and diabetes. Hearing test was performed again one month after treatment and compared with the test results at the time of diagnosis.Results As a result of comparing the hearing thresholds before and after the treatment in each group, there was a significant improvement in hearing thresholds in all groups (p<0.001). However, when comparing the effect of lipo-PGE1 for hearing change, there was a significant difference only in the group without any underlying diseases (p=0.016).Conclusion In this study, we show that lipo-PGE1 was helpful in hearing recovery when used in patients without underlying diseases rather than patients with hypertension or diabetes. Further studies will be needed to determine the therapeutic effects of lipo-PGE1 as an adjuvant treatment in SSNHL patients.
Unilateral Vocal Cord Palsy Caused by Cervical Osteophyte
Authors: Park Seung Jin , Shin Min Jun , An Tae Hoon , Song Yong Jin
Published: July 2021

Cervical osteophytes are bone spurs that grow on any part of the cervical spine. Osteophytes in the spine are a normal sign of aging and can be associated with conditions such as degenerative disc diseases, osteoarthritis, spinal stenosis, and others. When cervical osteophytes become large enough, main symptoms can include neck pain, radicular pain, neurological problems, and sometimes dysphagia, as well as hoarseness in rare cases. The authors report a case of left vocal cord palsy in a 75-year-old male patient with a large cervical osteophyte with a left anterior protrusion in the C5/C6 level.
Landslide susceptibility assessment using an integrated approach of the analytic network process and fuzzy logic, a case of Urmia Lake Basin
Authors: OMARZADEH Davoud , ESLAMINEZHAD Seyed Ahmad , EFTEKHARI Mobin , AKBAR Mohammad
Published: July 2021

The occurrence of landslides has always been a problem in spatial planning as an environmental threat. The aim of the present study was to zoning landslide sensitive areas in the Urmia Lake Basin and to investigate the correlation between the characteristics of the region and the amount of landslide. To achieve these purposes, the situation of landslide sensitive areas in the Lake Urmia Basin was investigated using a combination of Fuzzy and Analytical Network Process (ANP) methods. The criteria' weight is obtained using the ANP, fuzzy Membership command, linear function, the fuzzy weight of the sub-criteria, and their fuzzy membership degree (between 0 and 1) are calculated. The weighted raster layers were combined using the Gamma overlay function. As a result of this operation, a classified map has been obtained which shows that 16.6% of the area has a very high landslide susceptibility, and the highest area of the study area, i.e., 27.32%, has a relatively high landslide susceptibility. The results of the present study were compared with the data recorded using field observations at landslide sites. The results showed that out of 182 points collected, 148 points (equivalent to 81.31%) correspond to class 6 (very high landslide susceptibility) and class 7 (extremely probable). The results of this research can be used in crisis management, identifying the suitability of the region in terms of geomorphological features, identifying environmental and natural hazards.
ANALYZING THE CONTENT OF HISTORY MATERIALS IN THE 2013 CURRICULUM INTEGRATED THEMATIC BOOK FOR PRIMARY SCHOOLS (SD/MI)
Authors: Widodo Arif , Indraswati Dyah
Published: July 2021

The content of history materials should not be ignored in learning at elementary schools. However, in reality, history has always been regarded as a second-level lesson that is not very important. One of the causes is the teacher's ignorance of the educational values contained in the content of history materias. This study aimed to analyze history content in SD/MI thematic books. The object of this study was the 2013 curriculum integrated thematic book revised edition of 2017/2018. The method in this study was content analysis. The values found in the content of history materials at elementary schools included educational, instructive, recreational, and inspirational values. These values were contained in theme 5 “my hero” at grade IV, theme 7 “events in life” at grade V, and theme 3 “figures and inventions” at grade VI. In addition,, several character values were also found including heroism, nationalism, cooperation, unyielding, vigilant, and willingness to sacrifice for the sake of people. This study demonstrated the benefits of studying history for students. The 2013 curriculum integrated thematic book was very suitable to be used as a medium in studying history material at elementary school.
Scaling up of improved mung bean technology in the potential areas of North Shewa Zone Amhara Region
Authors: Kassa Yehuala , Mamo Dejene , Abie Amsalu , Tigabe Abiro , Ayele Teklemariam
Published: July 2021

Pulse crops are important components of crop production in Ethiopia's smallholders’ agriculture, providing an economic advantage to small farm holdings as an alternative source of protein, cash income, and food security. Mung bean is one of the most important cash crops in the low land of the North Shewa zone. This research was, therefore, initiated to provide an insight of scaling up of Rasa (N-26) mung bean variety and documenting best approaches to maximize production and productivity of the crop through improving the availability of improved varieties to farmers. The activities were done in the low lands of North Shewa areas of Efiratana gidim, Kewot, Shewarobit, Ensaro, and Merhabetie districts, under main growing season for two consecutive years (2016 – 2017) using Rasa variety. About 54 ha of land were covered through disseminating 2.17tons seed and a total of 203 (including 2 female farmers) farmers participated and directly benefited during the dissemination of mung bean variety. The productivity of mung bean in the area was boosted to 1.6 tons ha-1 and a yield advantage of 45.5% was obtained from improved varieties compared to the local cultivar. The introduction of the improved variety Rasa (N-26) which has a large seed size, high biomass, and grain yield attracts the attention of farmers, experts, and local traders. Developing and verifying pesticides, technical backstopping and supplying of early generation seed, and also introducing post-harvest storage materials is very crucial for sustained production and productivity improvement of the crop.
Agricultural extension agents’ education and turnover intentions in public extension services in Ethiopia
Authors: Jilito Mideksa F. , Wedajo Desalegn Y.
Published: July 2021

Agricultural extension agents provide informal education to equip farmers with new knowledge and skills. They play critical roles for the transfer of agricultural knowledge, technologies, and innovations. However, most of them dissatisfied and intend to find other employment in Ethiopia. Thus, this study was conducted to examine agricultural extension agents’ education, perceptions towards job satisfaction, and turnover intention in public agricultural extension services in Ethiopia. The sample frame was the list of all first, second, and third-year mid-career students joined Haramaya University to upgrade their educational qualification. Total 123 extension agents were involved in the study. Primary data were collected using a structured questionnaire and analyzed using descriptive statistics. Results revealed that about 89.40% of extension agents acquired new knowledge, skills, practices, and attitudinal change during attending their education at Haramaya University. Results also showed that extension agents were dissatisfied with their current job and organization in terms of payment, promotion, benefits, and recognition. Furthermore, survey results indicate that about 68.3% of extension agents intended to leave their current position and extension organization after completing a Bachelor of Science degree. Therefore, government, private sectors and other stakeholders who work in extension organizations should work on the education and training programs, work motivation, and job satisfaction of agricultural extension agents by designing various incentive packages to increase their work motivation and reduce turnover intentions.
Effects of rural-urban migration on socio-economic conditions of migrant households in district Peshawar, Pakistan
Authors: Ul Hassan Absar , Khan Noor P. , Shah Muhammad T. A , Khan Nimra , Khan Naushad
Published: July 2021

This study was focused to identify the effects of rural-urban migration on the socio-economic conditions of migrant households in District Peshawar, Pakistan.Total150 respondents sampled through proportionate sampling technique from four different locations of Peshawar city participated in the study. Data were collected from the sampled respondents on a structured questionnaire through face-to-face interview technique. Results show that the majority of the respondents migrated during 2001 and 2010. Along with the poverty and social amenities, other major reasons behind the migration in the study area were access to quality education, the war against terrorism, employment opportunities, and health issues. Majority of the joint families converted to the nuclear family system after the migration. Their economic conditions were enhanced.  As far as pre and post-migration facilities were concerned, positive changes were observed in the research area. It is recommended that the government and concerned authorities should ensure the provision of basic socio-economic facilities and off-farm employment opportunities to the rural people so that the ratio of urban migration could possibly be minimized.