bluuebunny/crossref_metadata_2025 huggingface dataset:
Detection of Tectonic and Crustal Deformation using GNSS Data Processing: The Case of PPGnet
Authors: Lyros Epameinondas , Kostelecky Jakub , Plicka Vladimir , Vratislav Filler , Sokos Efthimios , Nikolakopoulos Konstantinos
Published: January 2021

Aitolo-Akarnania prefecture, western Greece, is an area with strong earthquakes and large active fault systems. The most prominent are the Katouna sinistral strike slip fault and the Trichonis Lake normal fault system. Their proximity to large cities, and the lack of detailed information on their seismogenic potential, calls for multiparametric research. Since 2013, the area’s crustal deformation has been monitored by a dense GNSS Network (PPGNet), consisting of five stations, equipped with Leica and Septentrio receivers. The objective of this network is to define the rate of deformation across these two main fault systems. Data is recorded using two sampling frequencies, 1 Hz and 10Hz, producing hourly and daily files. Daily data is processed using Bernese GNSS Processing Software using final orbits of International GNSS Service. Double-difference solution is computed using phase measurements from the PPGNet network complemented by four stations from Athens’ National Observatory GNSS network and six stations from METRICA network. First results show a NNE movement at PVOG station of 12 mm/y and a similar movement at RETS station of about 9 mm/y. This means that the Trichonis Lake normal fault system, located between these two stations, depicts a slip rate of 3 mm/y. KTCH and RGNI stations move eastwards at a velocity of about 5 mm/y due to the Katouna-Stamna fault system. Data from PPGNet has provided important results on crustal deformation in the area, i.e. slip rates have been attributed to specific fault systems. The comparison and links of these data with broader geodynamic models is now possible and we expect, in a later phase that will provide a more detailed image of the associated seismic hazard for Aitolo-Akarnania. Doi: 10.28991/cej-2021-03091633 Full Text: PDF
Properties of High-Performance Concretes made of Black Sand at High Temperature
Authors: Eltawil Khaled A. , Tahwia Ahmed M. , Mahdy Mohamed G. , Abdelraheem Ahmed H.
Published: January 2021

To modify high-performance concrete (HPC) fireproofing properties, black sand (BS) was partially substituted as fine aggregate at various levels. This study aims at evaluating the BS reliability in improving HPC durability properties for various construction applications based on its unique heavy minerals. To achieve this, five HPC series blends were setup to substitute fine aggregate independently with BS. Substitution percentages ranged from 15 to 100% with consistent supplementary cementing materials (SCMs) proportion for each gathering. Tests were performed to assess compressive strength before and after fire exposure under various temperatures of 250, 500 and 750 °C at different curing age. Generally, blending FA with BS was better than using SF with BS. Utilizing BS in the range of 15 to 60% as fine aggregate with 10% FA improves HPC fire-insulating properties. Besides, Z1 SEM analysis observed homogenously and compacted HPC microstructure at 250 and 500 °C. Doi: 10.28991/cej-2021-03091634 Full Text: PDF
Unconfined Compressive Strength Characteristics of Overboulder Asbuton and Zeolite Stabilized Soft Soil
Authors: Dhani Noor , Gasruddin Ahmad , Hartini Hartini , Baride La
Published: January 2021

Soft soil was one of the most widely encountered problems in construction, especially for archipelago countries which most of its area was lowland with a high deposit of soft soil. To overcome this problem, soil stabilization was one of the most widely used as a solution. Soil stabilization in general uses chemical substances that are classified as pozzolan material. Pozzolan material uses its capability to strengthen the cohesion of soil grains. Mostly, pozzolan material consists of silica. Overboulder asbuton and zeolite were examples of natural pozzolan material in Indonesia. Both materials have a high silica content. Thus, the author interested to figure out the mechanical behavior of these two substances as a soil stabilizer. This research was a correlating study to the previous paper with the same author which discusses the overboulder asbuton as a soil stabilizer. Overboulder added to the mix is determined as 15%, with varied zeolite percentages applied to examine the differences. The UCT was conducted according to ASTM D-2166 as a parameter. As the standard remolding method, a standard proctor test was conducted to determine the optimum moisture content and the maximum density of each mix. While the UCT specimens were tested at the certain curing time for each composition. The curing time applied was 0, 7, 14, and 28 days. By this curing period, the effective pozzolanic reaction that occurs for each composition could be determined. The result shows that zeolite addition to overboulder asbuton could increase the soil density and increase its compressive strength. It is indicated that overboulder asbuton and zeolite mix could be a proper alternative as a soil stabilizer. Doi: 10.28991/cej-2021-03091635 Full Text: PDF
Evaluation of Concrete with Partial Replacement of Cement by Waste Marble Powder
Authors: Majeed Mushraf , Khitab Anwar , Anwar Waqas , Khan Raja Bilal Nasar , Jalil Affan , Tariq Zeesshan
Published: January 2021

This study aims to evaluate concrete having Waste Marble Powder (WMP) as partial replacement of cement. Marble is the metamorphic form of limestone (CaCO3) and WMP was chosen as substitute of cement on account of its high calcium oxide content. WMP is by-product of marble industry and is an environmental burden. The manufacturing of cement is also environmentally hazardous owing to emission of greenhouse gases. Thus, the recycling of WMP in place of cement in concrete offers two ecological advantages. Thirdly, WMP has a specific gravity of 2.6 against that of 3.15 for cement, which reduces the weight of the finished products. Based on the previous studies, five different concrete mixes were prepared having 0, 5, 10, 15 and 15% replacement levels. The samples were evaluated both through destructive and non-destructive tests.  Destructive tests included compressive, tensile and flexural strengths, whereas non-destructive tests comprised of ultrasonic pulse velocity (UPV) and rebound hammer. It was observed that the workability decreases with WMP inclusion owing to its higher water absorption, which inhibits lubrication of cement particles. The concrete strength improves up to a replacement level of 10% by mass of cement on account of densification created by the finer WMP and un-hydrated cement particles, which act as hard inclusions. Beyond 10%, the concrete strength starts declining due to insufficient quantity of cement matrix, binding the WMP particles. Schmidt rebound numbers authenticate the compressive strength results: The number increases up to 10% replacement level and beyond 10% it decreases. The results of UPV indicate that the velocity increases with increase in WMP content: The increase is attributed to compactness of the composite with finer WMP particles. Doi: 10.28991/cej-2021-03091637 Full Text: PDF
ОСОБЛИВОСТІ РОЗВИТКУ ПУБЛІЧНИХ ЗАКУПІВЕЛЬ В УКРАЇНІ В КОНТЕКСТІ ЄВРОІНТЕГРАЦІЇ
Authors: Karlin Mykola , Koshkina Kateryna
Published: January 2021

В статті аналізуються особливості здійснення публічних закупівель в Україні та їх відповідність нормативам ЄС, чинники, які впливають на їх ефективність; проблеми, які існують в Україні при проведенні тендерних закупівель; права та обов’язки контролюючих структур країни в царині здійснення публічних закупівель; фінансова відповідальність учасників тендерних закупівель. Проаналізовано й зміни, які відбулися у здійсненні цих закупівель після запровадження в 2020 р. нової редакції Закону України «Про публічні закупівлі».
СТРАТЕГІЇ РОЗВИТКУ ГОТЕЛЬНО-РЕСТОРАННОГО БІЗНЕСУ В УКРАЇНІ
Authors: Polinkevych Oksana
Published: January 2021

У статті встановлено, що готельно-ресторанний бізнес у період Covid-19 зазнає значних збитків. Доведено, що в сучасних умовах потрібно розробляти стратегії розвитку, які будуть протидіяти внутрішнім та зовнішнім ризикам. Систематизовано основні стратегії розвитку готельно-ресторанного бізнесу в період Covid-19. Зокрема, виділено дві групи стратегій розвитку: стратегія утримання позитивного іміджу на ринку та стратегія подолання негативних наслідків пандемії Covid-19. Запропоновано створення смарт міст в межах готельно-ресторанних комплексів. Виділено 10 ознак, на підставі яких можна стверджувати про наявність розумних міст у межах готельно-ресторанного бізнесу. Стратегія розвитку готельно-ресторанного бізнесу повинна формуватися із урахуванням сучасних тенденцій розвитку. Для цього варто формувати підходи, які б зменшували рівень ризику, який спричинений появою негативних очікувань клієнтів. Для  цього має бути використана маркетингова та збутова стратегія. Головну роль відіграватиме корпоративна культура, яка стане ядром майбутніх стратегічних змін. Важливою до впровадження є інноваційна стратегія, реалізація якої повинна відбуватися через створення розумних міст всередині готельно-ресторанного комплексу. Таки підхід мінімізує контакт із зовнішнім оточенням та сприятиме формуванню позитивного враження від якості послуг
КОНЦЕПЦІЯ УПРАВЛІННЯ ЦІННОСТЯМИ (MBV)
Authors: Lipych Lubov
Published: January 2021

У статті обґрунтовано, що управління цінностями – це концепція, що поєднує етичну, соціальну та економічну парадигму в сучасній бізнес-структурі, оскільки питання етики та соціальної відповідальності сприймаються сучасними підприємствами як джерело конкурентної переваги, визнаючи напрям діяльності, спрямований на підвищення їх ринкової вартості. Визначальна роль цінностей випливає з їх ключового впливу на поведінку в бізнес-структурі та встановлення напрямів її діяльності, адже вони виступають основним сполучним чинником усіх складових підприємства.
З метою вдосконалення концепції MBV, розглянуто її недоліки: неоднозначність понять "цінності", диференціацію працівників з точки зору їх потенційних системних проблем, поляризацію підприємств щодо вартості, втручання в професійне та приватне життя персоналу.
РОЛЬ МІЖНАРОДНОГО МАРКЕТИНГУ В ГЛОБАЛЬНОМУ ПІДПРИЄМНИЦТВІ
Authors: Lialiuk Alla
Published: January 2021

У статті досліджено погляд різних авторів на трактування терміну «міжнародний маркетинг»; розглянуто види міжнародного маркетингу; показано описано переваги та недоліки міжнародного маркетингу; наголошено на важливості  глобального міжнародного менеджменту; представлено процес міжнародного маркетингового стратегічного планування; описано приклади впливу маркетингових стратегій на розвиток глобального підприємництва; доведено, що успіх  глобального маркетингу компанії проявляється через  репутацію товарного бренду; наголошено про важливість в глобальному підприємництві вивчення національної культури країни,  на яку планує вийти підприємство  із своєю продукцією; запропоновані заходи щодо покращення глобального підприємництва за допомогою міжнародного маркетингу
РИНОК НЕРУХОМОСТІ ЗАХІДНОГО РЕГІОНУ УКРАЇНИ
Authors: Pavlova Olena , Pavlov Kostiantyn , Yushchak Anna , Quran Anna
Published: January 2021

Формування ринку будь якого типу нерухомості, як однієї із галузей економіки держави є самостійним видом діяльності, що має на меті в першу чергу забезпечення об'єктивною та достовірною, а також доступною інформацією осіб, які приймають рішення про проведення тих або інших операцій на ринку нерухомості. Завдання створення зазначеної інформаційно-кадастрової системи ринку нерухомості є необхідним для вирішенням такої проблеми на рівні нашої держави, оскільки індикатори зазначеного ринку, відображають загальний стан економіки країни. Недарма, завжди глобальні світові кризи практично у всіх країнах світу починалися саме з моменту падіння цін на нерухоме майно.
ЕВОЛЮЦІЯ НАУКОВИХ ПОГЛЯДІВ НА РОЛЬ СОЦІАЛЬНОГО КАПІТАЛУ В ЕКОНОМІЧНОМУ РОЗВИТКУ
Authors: Yelisieieva Liudmyla
Published: January 2021

У статті розкрито еволюцію наукових поглядів на роль соціального капіталу в економічному розвитку. Систематизовано наукові погляди дослідників від А. Сміта до сучасності щодо характеру та каналів впливу соціального капіталу на господарську систему та добробут економічних агентів зокрема. Розкрито роль досліджень Нобелівських лауреатів К. Ерроу, Е. Остром, А. Сена у розвитку теорії соціального капіталу та вивчення його економічних ефектів. Охарактеризовано місце наукового доробку М. Тугана-Барановського у формуванні концепції соціального капіталу. Запропоновано авторську періодизацію розвитку теорії соціального капіталу та перспективні напрями її дослідження.
СУТНІСТЬ ТА ЗМІСТ КОНКУРЕНТОСПРОМОЖНОСТІ ОБ’ЄДНАНИХ ТЕРИТОРІАЛЬНИХ ГРОМАД В УМОВАХ ІНКЛЮЗИВНОГО РОЗВИТКУ
Authors: Podzizei Oleh
Published: January 2021

Конкурентоспроможність об’єднаних територіальних громад (ОТГ) є ключовим елементом формування стратегічного плану їх розвитку. Тому адміністративно-економічна реформа, яка проводиться в Україні, повинна забезпечити необхідні умови для формування та розвитку територіальних громад. Об’єднані територіальні громади повинні функціонувати відповідно до принципів ефективного господарювання, необхідно враховувати усі затрати та вигоди від реалізації програм розвитку власної конкурентоспроможності. Результатом формування такої конкурентоспроможності є підвищення ефективності функціонування територіальних громад.
У статті розглянуто специфіку формування підходів до розуміння сутності конкурентоспроможності ОТГ, зокрема – конкретизовано фактори та чинники, що впливають на їх конкурентоспроможність. Визначено особливості взаємозалежності розвитку ОТГ від специфіки їх регіонального територіального розміщення.
Доведено, що забезпечення ефективного функціонування ОТГ в сучасних умовах потребує налагодження та становлення передумов щодо інклюзивного розвитку територій на основі забезпечення дотримання ключових факторів формування їх конкурентоспроможності.
МЕХАНІЗМ ФІНАНСОВО-ІНВЕСТИЦІЙНОГО ЗАБЕЗПЕЧЕННЯ РОЗВИТКУ ВИЩОЇ ОСВІТИ УКРАЇНИ В КОНТЕКСТІ ФУНКЦІОНУВАННЯ ЄПВО
Authors: Totska Olesia
Published: January 2021

У статті здійснено аналіз вітчизняних авторефератів дисертацій, присвячених дослідженню фінансової сфери вищої освіти. Проаналізовано показники сателітного рахунку освіти в Україні за 2018 р. за фінансуючими організаціями (фінансовими агентами), провайдерами (постачальниками послуг) та функціями освіти. Сформовано механізм фінансово-інвестиційного забезпечення розвитку вищої освіти України в контексті функціонування Європейського простору вищої освіти (ЄПВО), який містить фінансових агентів, інструменти та відповідні заходи на макро-, мезо- й мікрорівнях. Наведено перелік документів ЄПВО. Сформовано рекомендації щодо вдосконалення фінансово-інвестиційного забезпечення розвитку вищої освіти в частині доходів і видатків. Визначено перспективи подальших досліджень.
ASSESSMENT OF KNOWLEDGE AND ATTITUDE TOWARDS DIARRHEAL DISEASES IN CHILDREN UNDER FIVE YEARS IN SHENDI TOWN
Authors: Mohamed Ali Omar Yousof
Published: January 2021

Diarrheal diseases are a collection of diseases caused by multiple viral, bacterial, and parasitic organisms that share common symptoms, and it’s defined as the passage of three or more loose or liquid stool per day. This Descriptive community based cross sectional study was conducted in Shendi Town during the year2015To study Knowledge and Attitude towards diarrheal disease in children under five years. A system of simple random sampling allocation was followed to select the sample for coverage of diarrhea disease in Shendi town. The data was collected through instructed questionnaire according to SNAP standard Questionnaire which contains 20 closed ended questions with  simple language that was been easily to understood by the respondents . The collected data was analyzed by entering it into computer and analyzed using both Microsoft Excel and Statistical Package for Social Sciences Program (spss). The results then presented in tables and figures, and then subjected to additional statistical analyses T test to find associations and statistical significance by finding P value. The most important conclusions revealed from the study is, Most of mothers (55%) seek medical treatment when their children got diarrhea. The most important recommendations emerged from this study, Government and Shendi local authorities must educate mothers on diarrheal disease prevention and rehydration, Sufficient programs and facilities should be made available for family planning, Give oriented task health education to health workers.
SUPPLY CHAIN MANAGEMENT OF INDIAN ENTERPRISE IN INTERNATIONAL OPERATIONS:TYPE OF MODERN LITERARY CRITIQUE
Authors: Hajoary Deepak
Published: January 2021

This paper aims to explore supply chain management challenges and prospects in the international scenario. Globalization has delivered a platform for local companies to think at international level. The paper will highlights different critical scenarios of supply chain management. The study will identify key strategies that can be constructed at global supply chain. Issues of supply chain design, tools and sourcing strategy will be studied in the paper.
MOBILE SUBSCRIBERS’ ATTITUDE TOWARDS SERVICE TARIFF WITH SPECIAL REFERENCE TO TUTICORIN DIST
Authors: Golden S. Anthony Rahul
Published: January 2021

As it is a competitive world, Price plays a significant role in marketing. Increasing competition in this sector has led the providers to recognize the need to focus on the price of the service to retain the present customers. Normally, consumers think about the cost of the service or goods. After that only, they will consider about quality, colour, size and other features. Consumers may choose the mobile service provider in the tariff base. Thus, tariff influences in selecting mobile service provider. This study focuses on significance of service tariff in the satisfaction of the subscribers in Tuticorin Dist.
SOCIO-ECONOMIC STATUS OF SCHEDULED TRIBES IN KALRAYAN HILLS
Authors: Kumar Jaya , Palaniyammal
Published: January 2021

Social and economic justice, equality of status and opportunities and cultural and educational status are insured by the Constitution of India for all citizens and also provide enriched provisions for scheduled caste and tribes. This paper addresses the socio economic status of the scheduled tribes in kalrayan hills Salem district Tamilnadu (India). The majority of the household occupations are Agriculture. Cultivation is the primary occupation participated by the most heads of the sample households. Income from cultivation support majority of the sample population. More than 83 percent of the agriculture has from income around below Rs 5000-10000 level. Even daily wage labours are present in the sample population. There is a need to put more attention on educational aspects of scheduled tribes, where this only can motivate them for future life
ENTREPRENEURSHIP - A KEY FOR WOMEN EMPOWERMENT
Authors: Franco C. Eugine , Kumar SharmiSelva
Published: January 2021

Entrepreneurship is the core of economic development.  It is a multi- dimensional task and essentially creative activity. Entrepreneur is key factor of entrepreneurship. Entrepreneurship has been a male-dominated phenomenon from the very early age but time has changed the situation and brought women as today's most memorable and inspirational entrepreneurs. The position and status of women in any society is an index of its civilization and progress. Women  are  equally  competent  in  running  business  but  still  lacks  behind  in  spite  of  women empowerment  movement  in  our  country,  there  are  social,  cultural  and  economic  hurdles  in  the way of women entrepreneurship and the major problem is lack of entrepreneurial environment. In spite of having the potential and talent, women are deprived of opportunities, information and education. The  paper  talks  about  the  status  of  women  entrepreneurs  and also  analyze  the  factors  which motivates women to start their own venture and the problems faced by them when they ventured out  to  carve  their  own  niche  in  the  competitive  world  of  business  environment.  An attempt is made to understand the role of government to accelerate the growth of women entrepreneurship.
A STUDY ON BRAND PREFERNCE OF CONSUMERS IN PURCHASING HAIR DYE IN TIRUNELVELI CITY
Authors: Hamil A. , M Muniswari
Published: January 2021

Hair dye use is very common among both Men & Women. Hair dye users are increasing day by day coloring of hair is performed not only by professionals but also a popular cosmetic product. Hair dye is used mostly to change gray hair, since gray hair is a sign of an advanced age. Most of them are using hair dye in our home. Earlier natural hair dyes were used but now due to advancement in cosmetic industry, different types have been developed. There has been concern about hair dye since scientist is trying to find out if there is a link between hair color and cancer.
FACILE IN VITRO GLASS SLIDE LIGHT MICROSCOPY METHOD USING TETRACYCLINE TO VISUALIZE A REPETITIVE PATTERN IN AERIAL PLANT ROOT TIPS FILAMENTOUS NETWORK
Authors: Embi Abraham A.
Published: January 2021

The main purpose of this manuscript is to introduce a facile light microscopy methodology to visualize plant roots filaments. In a previous manuscript in vitro experiments on freshly plucked human hair roots documented the commonly used antibiotic Tetracycline (TE) deleterious effect on soft tissue, severe enough to allow for visualization of an underlying filamentous skeleton. In this manuscript, TE was also evaluated in a similar fashion of in vitro experiments, this time aerial plant roots were immersed in liquid Tetracycline. Images and video recordings are presented where plant aerial root tissue cells appeared to interact with Tetracycline, thus allowing for exposure of an underlying filamentous network. These filaments were documented undergoing biosorption of Tetracycline, thus indicating a probable cellulose base. It is emphasized that a literature search showed similar, albeit visually different displays of roots filaments obtained by using a Scanning Electron Microscopy. The method herein introduced could be an adjunct to existing established methodology in root function research. Two salient advantages are identified, firstly that the essential minimal material and equipment is limited to a light microscope, glass slides, chosen biological material, water and powder Tetracycline. Secondly, the speed in obtaining results would offer researchers a preliminary or perhaps a final correct conclusion.
FACTORS INFLUENCING TOWARDS THE PRUCHASE INTENTIONS OF READY-TO-EAT FOOD PRODUCTS AMONG THE CONSUMERS IN CHENNAI CITY
Authors: Babu R.Suresh , Balaji V. , Gajenderan Vijayakumar
Published: January 2021

Aim: The study’s purpose is to find out the factors influencing towards the Purchase of Ready-to-Eat food products among the consumers in Chennai city.  

Data Sources: The study used both primary and secondary data. The secondary data obtained from the articles, research papers, newspapers, and magazines. The primary data is collected from the consumers of Ready-to-Eat food products in Chennai city. The preliminary data sourced from the consumers through structured questionnaires.

Sample size & Method: The study employed the convenience sampling method. Overall, 400 questionnaires were distributed, out of which 392 filled questionnaires were collected from the consumers. Out of 392 questionnaires, seven questionnaires rejected due to inadequate information provided by the consumers. Finally, 385 questionnaires were used for the final analysis.

Findings: The study found that the factors namely Convenience, Quality, Mood, Sensory Appeal, Price, and Stress-free significantly influencing the purchase intentions of Ready-to-Eat food products among the consumers in Chennai city.
ASSESSMENT OF RURAL HOUSEHOLDS FOOD INSECURITY DURING COVID-19 PANDEMIC IN SOUTH-EAST NIGERIA
Authors: EGWUE Ogechi Lynda , AGBUGBA Ikechi Kelechi , MUKAILA Ridwan
Published: January 2021

The problem of food insecurity remains a challenge in developing countries, especially in rural areas. Despite the rising level of food insecurity, COVID-19 set in and was said to pose a threat to food security globally if adequate measures are not quickly put in place. This study, therefore, described the socio-economic characteristics of the respondents; examined the extent to which the rural households are food secure or otherwise during the COVID-19 pandemic and examine the drivers of food security status among rural households in South-East Nigeria. Primary data were collected from 200 households with the use of structured questionnaires. Data were analysed using descriptive statistics, food security index and logistics regression. Results of the findings revealed that the majority of the household heads were male (92%), married (93.5%), educated (87.5%) and had an average age of 54 years. They had an average household size of 7 persons, an average farming experience of 22 years, an average monthly income of N14, 305.5 and majority (83%) do not belong to a cooperative society. Majority (69.5%) of the households were food insecure, while only (30.5%) were food secure. The food-secure households had an average household size of 5 persons, while the food insecure households had 9 persons in their households. The headcount ratio of food secure households was 0.30, while it was 0.70 for food-insecure households. This shows that at least two out of three persons were food insecure in the study area. The surplus/shortfall index indicates that the food secure households exceeded the calorie requirement by 12%, while the food insecure fell short of the recommended calorie intake by 39%. Square food insecure gap or square shortfall index which indicate the severity of food insecurity among the food insecure household was 0.0056. The average calorie available (adult equivalent per day) for food secure households was 2523.5kcal, while average calorie available (AE/day) for food-insecure households was 1389.05kcal. The identified positive drivers of food security were marital status, educational level, cooperative members and annual income of the household heads. While, age of household head, household size and COVID-19 negatively influenced food security status. The study recommends, among others, putting in place immediate policy measures to reduce the effect of COVID-19 pandemic on rural household’s food security through the provision of enough palliatives which should be monitored so that it gets to the targeted population. Effective household size management and enlightenment programs on modern family planning techniques should be encouraged in rural areas. Rural households should also be educated on the nutritional implication of the various food items such as egg, milk, soybean and fish, especially for children to increase their protein intake and boost their immune system against COVID-19.
Trend Analysis and Comparison of Forecast Models for Production of Turkish Crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Turkey
Authors: KALE Semih , BERBER Selçuk
Published: January 2021

This paper aimed to develop forecasting models and to assess the trends in the production of freshwater crayfish in Turkey. Different trend analysis methods (Box-Jenkins method, Şen’s innovative trend analysis, Mann-Kendall test) were compared, and different autoregressive integrated moving average (ARIMA) models were generated to forecast the future trend. The results of the innovative trend analysis methodology and ARIMA models revealed that freshwater crayfish production has a decreasing trend during the study period, although there are some fluctuations. ARIMA models predicted that the production of freshwater crayfish would continue to decrease in the future period. The present paper is also the most temporally rich assessment of the crayfish production in Turkey encompassing 100+ years from 1909 to 2018. Several factors such as climate change, overexploitation, diseases, legal regulations, and fisheries management policies might affect the production amount. Therefore, appropriate policies for fisheries management and legal regulations should be planned and implemented to improve the production.
The mediating role of price sensitivity in the effect of trust and loyalty to luxury brands on the brand preference
Authors: Pir Esra , Derinözlü Evrim
Published: January 2021

In the age of consumption, customers prefer high-quality and exclusively designed luxury brands. This trend is based on a variety of reasons, such as the manifestation of status and wealth, as well as positive emotions and symbolic power created by these brands. The study aims to examine the variables of trust and loyalty to luxury brands, brand preference and price sensitivity, and to determine whether there is a meaningful relationship between these variables. If there is, to investigate the mediating role of price sensitivity in the effect of consumer trust and loyalty to luxury brands on brand preference. The methodological framework of the research includes planned behaviour theory to predict customers’ intentions and behaviours towards luxury brands. The information base of the research includes data from the online survey of 563 respondents from Turkey. Among the main research methods applied in the study are descriptive statistics and correlation analysis. SPSS 22.0 and AMOS software, as well as the principles of structural equation modeling are used to analyze the data. In the research, we could not determine the mediating role of price sensitivity in the effect of brand trust and loyalty on brand preference. A statistically significant, positive, and healthy relationship exists between brand trust and brand loyalty and brand preference. The study shows that the effect of price sensitivity and brand trust on brand preference is weak. The theoretical and practical importance of the study is to support companies in developing successful luxury branding strategies and to contribute to the luxury brand literature.
Tale of Two Frames
Authors: Azmi Aryan , Cruz Cristiane
Published: January 2021

Background. Physical activity has been shown to decrease the risk of a variety of diseases. However, recent studies indicate that only 15% of Canadian adults engage in adequate levels of physical activity. As such, an area of interest for physical activity promotion has been the use of persuasive messages, specifically, the use of framing effects as a method of persuasive communication. This study uses the Self-Determination Theory (SDT) to investigate the effects of framed health messages on autonomous motivation.

Methods. 107 York University undergraduate students (N=107; 51 females, 56 males) ages 18 – 30 were recruited from the school of Kinesiology and Health Sciences. Participants were randomly assigned to one of three message groups: gain-framed, loss-framed and control. They were given and instructed to read the messages. Afterwards, the participants’ autonomous motivation levels were measured.

Results. 68.2% of the participants were considered physically active. No significant difference in autonomous regulation levels were observed between the three frame groups. However, a significant interaction was shown between participants’ gender and frame condition; among the female participants, levels of autonomous regulation were significantly higher in the loss frame group, when compared to the control group.

Conclusion. Based on the results of this study, women who were exposed to loss-framed messages tended to demonstrate higher levels of autonomy. Similar framing effects were not evident in males.
Wybrane cechy charakterystyczne depozycji atmosferycznej na terenie Koszyc
Authors: HANČUĽÁK Jozef , ŠPALDON Tomislav , ŠESTINOVÁ Oľga
Published: January 2021

Artykuł dotyczy emisji do powietrza cząstek stałych i wybranych pierwiastków w typowym obszarze miejskim z wieloma źródłami zanieczyszczeń. Głównymi źródłami zanieczyszczeń są sąsiednie huty żelaza i stali oraz elektrownia cieplna. Próbki pobrano z jedenastu miejsc, które znajdują się w odległości od 3,6 do 16 km od huty żelaza i stali. Badano cechy ilościowe i jakościowe całkowitej emisji cząstek stałych, strumienie osadzania pierwiastków Fe, Al, Mn, Zn, Pb, Cu, Cr, Cd, As oraz ich sezonowe zmiany. Przedstawiono wyniki z lat 2009–2018. Badania wykazały znaczący wpływ lokalnych źródeł zanieczyszczeń na badane parametry zanieczyszczeń w atmosferze. W porównaniu z wartościami depozycji zmierzonymi w innych obszarach, wyjątkowo wysokie wartości zawartości żelaza (28, 120), manganu (1106) i chromu (34,1 μg.m–2 dni–1), a także wysokie, ponadprzeciętne wartości innych monitorowanych pierwiastków zmierzono w pobliżu huty. Część źródeł emisji hut żelaza i stali w poszczególnych lokalizacjach w mieście stwierdzono w przedziale od 24,7 do 54,1%. Na podstawie sytuacji emisyjnej monitorowanego obszaru można zastosować wybrane związki AD jako wskaźnik jakości środowiska i określić ilościowo udział emisji w obciążeniu środowiskowym obszaru
Kropki kwantowe węgla (CQD) przygotowane z biomasy odpadowej jako nowa klasa biomateriałów o właściwościach luminescencyjnych
Authors: JANUS Łukasz , PIĄTKOWSKI Marek , RADWAN-PRAGŁOWSKA Julia , SIERAKOWSKA Aleksandra
Published: January 2021

Kropki kwantowe węgla (Carbon Quantum Dots – CQD) to obiekty o rozmiarze mniejszym niż 10 nm, które mają zdolność emitowania promieniowania w zakresie widzialnym od od niebieskiego do czerwonego w zależności od zastosowanego promieniowaniawzbudzenia. Kropki kwantowe stosuje się w bioobrazowaniu in vitro struktur komórkowych lub tworzeniu bioczujników. W przeciwieństwie do klasycznych nanodotów, które są otrzymywane z prostych siarczków, selenków lub tellurków metali, kropki kwantowwęgla są zbudowane z nietoksycznego, biokompatybilnego rdzenia węglowego, dzięki czemu możliwe jest zastosowanie kwantowychkropek węgla w bioobrazowanie struktur biologicznych in vitro lub in vivo przy minimalnym działaniu cytotoksycznym na komórkiCelem badań było uzyskanie nanodotów węglowych zdolnych do emitowania fluorescencji przy użyciu ligniny z biomasy odpadowejCQD sfunkcjonalizowano aminokwasami. Rezultatem prac było uzyskanie serii CQD o zaawansowanych właściwościach luminecencyjnych z zastosowaniem metod hydrotermalnych i mikrofalowych. Gotowe produkty badano pod kątem ich cytotoksyczności
Removal of Contaminants from Water by Bacterial Activity
Authors: JENČÁROVÁ Jana , LUPTÁKOVÁ Alena , KUPKA Daniel
Published: January 2021

High concentration of sulphates and metals in waters is often as a consequence of anthropogenic activity and industry. The principlesof the biological-chemical methods for pollution removal include various processes. The most widely metabolic pathway of sulphate-reducing bacteria - overall dissimilatory reduction - is the complete reduction of sulphate to hydrogen sulphide. Two major metabolicgroups are known, depending on whether or not they can oxidize acetate. One group utilizes lactate, fumarate, propionate, butyrate,pyruvate, and aromatic compounds, which they typically oxidize to acetate, while the other group oxidizes acetate to CO₂ and H₂O.Sulphate is reduced to H₂S through a series of intermediate reactions. The end product of this reaction, hydrogen sulphide, can reactwith metal ions to form insoluble metal sulphides or reduce soluble toxic metals, often to less toxic or less soluble forms. This way,sulphate-reducing bacteria are utilizable in bio-elimination of sulphate and metal from water.
Removal of Fluoride Ions from the Mine Water
Authors: KRASAVTSEVA Eugenia , SVETLOV Anton , GORYACHEV Andrey , MAKAROV Dmitry , MASLOBOEV Vladimir
Published: January 2021

Murmansk Region is home to some major mining and mineral sites. One of the most challenging environmental problems in themining industry is mine water treatment. For example, the rocks of the deposit operated by Lovozero Mining and Mineral ProcessingCompany contain villiomite (NaF). It is highly soluble in water, and the mine waters at the site have a high content of fluoride ions –significantly above the maximum permissible values.Lab-scale experiments were conducted to test various reagents and different initial concentrations of fluoride ions in the treatment ofmodel solutions and mine water. Depending on the initial concentrations, magnesium and calcium-containing sorbents are proposedfor the defluorization of water. Using scanning electron microscopy and microprobe analysis, it was found that fluorine can be boundin poorly soluble compounds, such as, for example, fluorite.Pilot trials are planned.
Technical Infrastructure Increasing Resistance in the Natural Environment
Authors: KROČOVÁ Šárka
Published: January 2021

The natural environment has its specific patterns that a human must take into account during realisation of any technical infrastructure of the world countries. Underestimating the dangers that can arise from natural phenomena has often serious consequences. Forsome constructions of technical infrastructure, especially their line constructions, there will be a high number of operational accidentswith extremely negative impact on the supplied regions with energy or drinking water. Other types of technical infrastructure forexample in nuclear power have a potential to create a natural emergency threaten the environment not only in the country of theirdislocation but also in the long term to change living conditions in entire regions.The following article deals with this issue in a suffcient basic range suggests chat ways and means to recognize the threat of danger andthen based on risk analysis to eliminate the consequences to an acceptable level.
Steelmaking Dust: Speciation of Zinc by Sequential Leaching
Authors: LANZERSTORFER Christof , PREITSCHOPF Wilfried
Published: January 2021

In electric arc furnace (EAF) steelmaking significant amounts of dust are generated. The main component in the dust is usually iron.Additionally, increased concentrations of metals which are volatile in the steelmaking process like zinc are found in the dusts. Duringcooling of the off-gas in the off-gas system the volatile metals are deposited on the dust particles. In electric arc furnace dust the zinccan be present in different compounds, for example as zinc oxide and zinc ferrite. Although recycling of EAF dust and utilization forzinc recovery are practiced in several countries approximately 50% of the EAF dust produced worldwide is still goes to landfill. In thisstudy the EAF dust from a mini mill was investigated by chemical fractionation. The experiment was carried out in a sequence of fiveleaching steps, where the residue from a leaching step was treated in the next step. The total zinc content of the EAF dust was approximately 6.4%. In the water-soluble fraction no zinc was found, while the carbonated fraction and the oxide fraction each containedapproximately 25% of the zinc. The reduced fraction contained approximately 8% of the zinc and the majority of the zinc was in theresidual fraction.
Combination of Chemical and Biological-Chemical Methods for Elimination of Metals from Acid Mine Drainage
Authors: LUPTÁKOVÁ Alena , MAČINGOVÁ Eva , UBALDINI Stefano , LUPTÁK Miloslav
Published: January 2021

Each acid mine drainage has a specific composition, but always contains sulphuric acid, dissolved heavy metals, sulphates, iron precipitates and their pH can be very low. The elimination of metals form the acid mine drainage is a severe environmental problem andhas been a long-standing major concern to scientists, engineers, industry and governments. Various methods are used for the metalsremoval from waters, but any of them have been applied under commercial-scale conditions. Mostly studied are chemical and biological-chemical methods. Main aim of the paper was to interpret the combination of chemical and biological-chemical methods for theheavy metals elimination from the synthetic solution of acid mine drainage, coming from the zinc mine located in Tùnel Kingsmilloutlet of the Rio Yaulì (district of Yauli – Perù). The metals selective precipitation as hydroxides (chemical method) and sulphides(biological-chemical method) at the various values of pH acid mine drainage is the fundamental of the examined process. For thehydrogen sulphide production the sulphate-reducing bacteria of genus Desulfovibrio was used. The selective sequential precipitationprocess reaches the selective precipitation of chosen metals with 97–99% efficiency – Fe, As, Al and Mn in the form of metal hydroxides,Cu and Zn as metal sulphides
Development of Filling Material with Fly Ash and Slag as Lubricant in Pipe Jacking Under Acid Sulfate Soils
Authors: MAEHARA Kazuki , SHIMADA Hideki , SASAOKA Takashi , HAMANAKA Akihiro
Published: January 2021

The pipe jacking method is relatively reasonable among trenchless construction methods.For the application of this method, the acid sulfate soils have negative impacts on filling materials (one of the cement materials) injected into the tail-void which are over-cutting areas formed to reduce the friction between the pipes and the surrounding soils. In thisstudy, the application of fly ash and slag is discussed to minimize the effect of sulfur acid to filling materials. As the results of the experiments, the addition of fly ash and slag can control the gelling time and prevent the reduction of uniaxial strength of filling materialsunder the acid sulfate soils. In addition, the filling materials added slag lowered frictional resistance compared to that of fly ash. Fillingmaterials with the lower frictional resistance are preferred to apply for the smooth pipe jacking constructions. Therefore, filling materials added slag would show better performance than that of fly ash under the acid sulfate soils due to its lower frictional resistance.
Hidden Microcosmos in Slovak Gold Mine Rozalia – Microbial Gold Miners?
Authors: MALINIČOVÁ Lenka , NOSÁĽOVÁ Lea , TIMKOVÁ Ivana , PRISTAŠ Peter , SEDLÁKOVÁ-KADUKOVÁ Jana
Published: January 2021

Biogeochemical cycling of gold involves dispersion and reconcentration of gold (Au) due to physical, chemical and biological processesin Earth surface environments. These processes are evocated by a metabolic activity of different microbial taxa but many of them (andalso their biogeochemical potential) are still unexplored. Understanding the gold cycling is necessary for developing innovative, environmentally friendly gold processing techniques. Our experiments were aimed on isolation and identification of heterotrophic bacteriafrom ore and ore storage dump samples collected in Rozália gold mine in Hodruša-Hámre. Using culture-based approach followed bycombination of MALDI-TOF MS protein profiling and 16S rDNA sequencing, 18 different bacterial genera were identified in studiedmicrobiota. The participation of several representatives of these genera in individual gold cycling steps has already been reported. Thereal involvement of bacterial isolates in gold transformation reactions and their biogeochemical potential will be studied in subsequentexperiments.
Study of Chemical Pollutants and the Methods of Economic Reconstruction of the Rovinar Basin
Authors: MATEI Raluca , DUNCA Emilia-Cornelia , MATEI Aronel
Published: January 2021

Soil being considered as a resource at anyone's disposal in quantities at its discretion, so there is currently no interest from economicagents to recover and use it efficiently. At the global level, both law and NGOs increasingly require ongoing land use monitoring for thepurpose of soil conservation, requiring studies, field and laboratory investigations, prevention, prevention and control projects, methods and techniques. The paper will focus on the analysis of chemical parameters and pollutants (pH, humus, SB, T, total content ofN. P, K, Ca, Mg, total Fe, Mn, Cu, Co, Ni, Pb, sulphites, nitrites, pesticides, complex hydrocarbons), the concentration of heavy metals(Cd, Hg, Zn, Pb) of the objectives in the Rovinari basin.
Essesment of IM-50 and TOFA Adsorbed Layer on Cassiterite in Flotation of Tin Sulfide Wastes
Authors: MATVEEVA Tamara , GROMOVA Nadezhda
Published: January 2021

The paper presents the results of experimental study of the adsorption characteristic of theIM-50 and tall oil fatty acids (TOFA) collector reagents on cassiterite. UV-spectrophotometric method, scanning electron and lasermicroscopy were applied to analyze the adsorption of the reagents. SHIMADZU UV 1800 was used to obtain the UV spectra of aqueous solutions of IM-50 reagents and saponified TOFA at varied concentrations. IM-50 has not got characteristic adsorption maximain ultraviolet and visible spectrum. TOFA has a weakly pronounced maximum absorption in the range of 233-244 nm. Microscopicphotographs of cassiterite sections were obtained with LEO 1420VP INCA equipped OXFORD ENERGY 350 analyzer. Reagent IM-50and TOFA collector reagent, Newly formed organic matter phases of IM-50 and TOFA were detected. X-ray spectra characterized theincreased carbon content indicating adsorption on the surface of cassiterite IM-5- and TOFA.By measuring the surface relief parameters of polished cassiterite, using KEYENCE VK-9700 scanning laser microscopy and VK-Analyzer software, a qualitative and quantitative assessment of the IM-50 and TOFA reagent layer on the cassiterite surface was performed. Measurements were performed in the several fields of view and showed the degree of IM-50 coating varied from 40.5 to 42.6%of the surface area, and TOFA average coating was 38.5%. Subsequent washing with water does not remove the reagents from thesurface of the mineral and indicates a strong fixation of IM-50 and TOFA on cassiterite, which can have a positive effect on flotationextraction of sludge tin fractions.Qualitative and quantitative results of the reagent adsorption helped to make a forecast of their floatability by the studied collectors.This study is supported by the Russian Science Foundation (project No. 17-17-01292).
Biosorption of Lead and Cadmium Ions on the Green Parts of Daucus Carota
Authors: MUCHA Martin
Published: January 2021

This study deals with utilization of milled stems and leaves of carrot (Daucus carota) for the adsorptive removal of Pb(II) and Cd(II)from the aqueous solution. Carrot was bought in the local grocery, it was dried at the laboratory temperature and milled. Preparedmaterial was analysed by the infrared spectrometry which confirms good structural homogeneity of the sample. Kinetic measurementswere performed for estimation of adsorption equilibrium time. Equilibrium of Pb(II) adsorption was established after 6 hours of contact time, equilibrium of Cd(II) adsorption was established after 24 hours of contact time. The isotherms’ measurements were realizedwith the contact time 24 hours for the estimation of adsorption capacities of the studied sorbent. Adsorption capacities were around47 mg/g for Cd(II) and 154 mg/g for Pb(II). Changes of pH values of the sorption solutions were negligible but some amount of Ca(II),Mg(II), K(I) and Na(I) ions was released to the solution during adsorption process. Daucus carota stems and leaves exhibit good sorption capacities and they could be utilized for adsorptive removal of Pb(II) and Cd(II) ions from the aqueous solutions.