bluuebunny/crossref_metadata_2025 huggingface dataset:
Structure of geometrical nonlinearities in problems of liquid sloshing in tanks of non-cylindrical shape
Authors:   Taras Shevchenko Kyiv National University, Limarchenko O. , Cattani C. ,   University of Salerno, Pilipchuk V. ,   Wayne State University
Published: April 2022

Structure of geometrical nonlinearities in mathematical model of liquid sloshing in tanks of non-cylindrical shape is under consideration. In contrast to the case of cylindrical reservoir, some new types of nonlinearities occur in mathematical statement of the problem. They are connected with four main reasons. First, they are determined by new normal modes, which correspond to non-cylindrical shape of the tank and take into account some nonlinear properties of the problem (for example, they follow tank walls above level of a free surface). Second, determination of the potential energy of the liquid includes tanks geometry in close vicinity of cross-section of undisturbed free surface of the liquid and tank walls. Third type of manifestation of geometrical nonlinearities is connected with compensation of elevation of liquid level due to non-cylindrical type of tank shape for providing law of mass conservation. The fourth type of nonlinearities is connected with simultaneous manifestation of physical and geometrical nonlinearities. Investigation showed that mostly manifestation of nonlinear properties of liquid sloshing, connected with geometrical nature, is predetermined by inclination and curvature of tank walls in close vicinity of contact of undisturbed liquid with tank walls. We illustrated some general properties of geometrical nonlinearities by the example of three cases of tanks, namely, cylindrical, conic, and paraboloidal tank, which is selected such that its walls have the same inclination near free surface of the liquid as conic tank, but in this case curvature is manifested supplementary.
Simulation of nonstationary regimes of gas transmission systems operation
Authors:   Institute of Gas Transmission PJSC Ukrtransgas, Prytula N. , Gryniv O. ,   LTD "Mathematical centre", Dmytruk V. ,   Lviv Polytechnic National University
Published: April 2022

A mathematical model of the gas transmission system is studied in this article. Models of gas flows in the main technological objects that are involved in the transportation of gas are represented. The structure of the system is represented in terms of graph theory. Adaptive algorithm of the gas transportation system model implementation is constructed and real-world examples of its work are presented in this paper.
Speech signal marking on the base of local magnitude and invariant segmentation
Authors:   Lviv Polytechnic National University, Rashkevych Yu. , Peleshko D. ,   Lviv Polytechnic National University, Department of Publishing Information Technologies, Pelekh I. ,   Lviv Polytechnic National University, Izonіn I. ,   Lviv Polytechnic National University
Published: April 2022

The paper suggests a new watermarking scheme based on invariant method of segmentation and the use of local magnitude for marking speech signals. The watermark is embedded in the chosen form at peaks with the spectrum magnitude of each nonoverlapping frame of audio signal.
Interparticle interactions, general relativity effects, and critical parameters of white dwarfs
Authors:   Ivan Franko National University of Lviv, Vavrukh M. , Tyshko N. ,   Ivan Franko National University of Lviv, Smerechynskyi S. ,   Ivan Franko National University of Lviv
Published: April 2022

Two methods of mass calculation of degenerate dwarfs were considered: based on (1) hydrostatic equilibrium equation as well as (2) variational principle. In this work we used model with ideal electron subsystem and one with Coulomb interaction. An instability region of massive white dwarfs was explored. For the first time, taking into account the Coulomb interaction, there were obtained critical values of mass and relativistic parameter at wich instability due to general relativity effects occured.
Analysis of Influencing Factors of Cold Chain Logistics Cost of Dairy Products
Authors: Zhong Xiawei , Wen Zijuan , Wei Leiyang , Xu Wenjie , Zhang Yingjie , Yu Longfei , Xue Lin
Published: April 2022

Alongside the gradual improvement of the market position of dairy cold chain logistics, the cold chain transportation technology used in the logistics industry has also been taken to a whole-new level. There exists a fundamental contradiction between the rigorous requirements of dairy products for temperature control and the low level of development of cold chain logistics, and this contradiction is one of the reasons for the high costs of dairy cold chain logistics. To address this contradiction, we established an indicator system of factors influencing the costs of dairy cold chain logistics from three dimensions of dairy product characteristics, transportation process and cold chain logistics market, and invited managers from dairy companies and transportation professors from relevant universities to probe into the corresponding weights and to pin down the appropriate scores for indicators at all levels. Then we harnessed the AHP method to calculate the important weights for indicators at all levels, and eventually put forward the optimal solution for cutting the costs of cold chain logistics through weight difference analysis.
Corporate Social Responsibility and Corporate Performance: A Meta-Analysis
Authors: Zhang Leinan , Zeng Qingyan , Wang Silin , Li Na
Published: April 2022

Corporate social responsibility is an important force to increase the total social welfare and promote the sustainable development of corporates. However, there have been serious differences in the academic research on the impact of corporate social responsibility on corporate performance. Based on the previous research on corporate social responsibility and corporate performance, this study further refines the variable dimension and deeply analyzes the relationship and mechanism between them. Providing a methodologically and systematically rigorous review than prior efforts, this study conducts a Meta-analysis of 42 studies yielding a total sample size of 92863 observations. The results suggest that corporate social responsibility has a significant positive effect on corporate economic & financial performance, especially on accounting-based performance. The findings also indicate that year of publication, sample country and sample industry have moderating effect on the mean effect. These findings enrich the study of CSR and organization sustainability.
Työpaikkaselvityksen digitaaliset ratkaisut ja kehittämistarpeet työterveyshuollossa
Authors: Nissinen Sari Päivikki , Sormunen Erja , Leino Timo
Published: April 2022

Työpaikkaselvitys on työterveyshuollon ja työpaikan yhteistyön lähtökohta ja osa työpaikan työsuojelutoimintaa. Työpaikkaselvityksessä työterveyshuolto arvioi toistuvin työpaikkakäynnein työhön, työympäristöön ja työyhteisöön liittyvien terveysvaarojen, kuormitustekijöiden ja voimavaratekijöiden terveydellistä merkitystä ja merkitystä työkyvylle. Muuttunut työelämä ja digitalisaatio ovat kuitenkin lisänneet työn monimuotoisuutta ja työtä tehdään yhä enemmän virtuaalisissa työyhteisöissä. Siksi digitalisoitu työpaikkaselvitys on yleistynyt työterveyspalveluissa.
Tutkimuksen tavoitteena oli tuottaa tietoa työterveyshuollon digitalisoidusta työpaikkaselvityksestä. Tutkimus tehtiin laadullisena tutkimuksena elo-syyskuussa 2019. Tutkittavat (n = 18) olivat työterveysammattilaisia, jotka työskentelivät kahdeksalla eri työterveyshuollon palveluntuottajalla. Aineisto kerättiin ryhmähaastatteluina (n = 8), joiden teemat liittyivät työterveyshuollon työpaikkaselvitysprosessin eri vaiheisiin. Aineisto analysoitiin sisällönanalyysimenetelmällä.
Haastattelujen mukaan digitalisoitu työpaikkaselvitys sisälsi yleisimmin esihenkilöille ja työntekijöille kohdennetun sähköisen kyselyn työn vaara- ja kuormitustekijöistä sekä digitaalisen alustan työterveyshuollon ja työpaikan yhteiseen dokumenttien hallintaan ja yhteydenpitoon. Kehitystarpeina mainittiin sähköisten kyselyjen yhtenäistäminen sekä mahdollisuus hyödyntää aiempia työpaikkaselvitysraportteja. Lisäksi työpaikkaselvitysraportit pitäisi pystyä näyttämään työpaikoille visuaalisemmassa muodossa.
Digitalisoitu työpaikkaselvitys on useimmiten sähköinen kyselylomake. Vaikka teknologian käytössä on tapahtunut pientä edistystä, on välttämätöntä jatkaa työpaikkaselvitysprosessin digitaalista kehittämistä. Teknologia mahdollistaa työn reaaliaikaisen havainnoinnin, jopa niillä työpaikoilla, joissa työterveyshuollon ammattilaiset eivät voi käydä fyysisesti paikalla.
Distributed network and service architecture for future digital healthcare
Authors: Harjula Erkki , Kumar Tanesh , Islam Johirul , Ejaz Muneeb , Kovacevic Ivana
Published: April 2022

According to World Health Organization (WHO), the worldwide prevalence of chronic diseases increases fast and new threats, such as Covid-19 pandemic, continue to emerge, while the aging population continues decaying the dependency ratio. These challenges will cause a huge pressure on the efficacy and cost-efficiency of healthcare systems worldwide. Thanks to the emerging technologies, such as novel medical imaging and monitoring instrumentation, and Internet of Medical Things (IoMT), more accurate and versatile patient data than ever is available for medical use. To transform the technology advancements into better outcome and improved efficiency of healthcare, seamless interoperation of the underlying key technologies needs to be ensured. Novel IoT and communication technologies, edge computing and virtualization have a major role in this transformation. In this article, we explore the combined use of these technologies for managing complex tasks of connecting patients, personnel, hospital systems, electronic health records and medical instrumentation. We summarize our joint effort of four recent scientific articles that together demonstrate the potential of the edge-cloud continuum as the base approach for providing efficient and secure distributed e-health and e-welfare services. Finally, we provide an outlook for future research needs.
Leukocyte Adherence Inhibition Test to the assessment of Immunoreactivity Against Cow’s Milk Proteins in Non—IgE-Mediated Gastrointestinal Food Allergy
Authors: Olivier Celso Eduardo , Pinto Daiana G. , Teixeira Ana Paula M. , Santana Jhéssica L. S. , Santos Raquel A. P. G. , Lima Regiane P. S.
Published: April 2022

Background:  The non—IgE-mediated food allergy syndromes are a group of conditions diagnosed mostly by clinical criteria and Oral Food Challenge tests (OFC).

Objective:  To evaluate the feasibility of the Leukocyte Adherence Inhibition Test (LAIT) to discriminate antigen-specific immunoreactivity in a group of patients with non—IgE-mediated cow’s milk allergy diagnosed by OFC and clinical criteria.

Methods:  Ex vivo challenge tests performed with cow’s milk proteins extracts were monitored by LAIT in two groups: A) the active group consisting of 38 patients presenting non—IgE-mediated gastrointestinal lactose-free cow’s milk hypersensitivity; B) the control group consisting of 29 cow’s milk tolerant individuals

Results:  The mean Leukocyte Adherence Inhibition (LAI) of the control group was 5.48%, and the mean LAI of the active group was 54.18%.  The non-parametric Wilcoxon-Mann-Whitney U test showed p < α = 0.05.

Conclusion:  The Leukocyte Adherence Inhibition Test is an ex vivo immunoassay able to predict individual non—IgE-mediated immunoreactivity against cow’s milk allergens and to act as a triage test to select food allergens to be prescribed in exclusion diets to perform OFC in patients with suspected non—IgE-mediated food allergies.
The Effect of Organizational Justice, Organizational Climate and Social Support on Turnover Intention in Nadis Herbal Ubud
Authors: Ningsih Ni Putu Tri Utami , Suwandana I Gusti Made
Published: April 2022

This study aims to examine the Effect of Organizational Justice, Organizational Climate and Social Support on Turnover Intention. This study was conducted at Nadis Herbal Ubud with 36 respondents. Data collection was obtained from interviews and distributing questionnaires. The data analysis technique used multiple linear regression analysis. The results of the study are organizational justice has a negative and significant effect on employee turnover intention, organizational climate has a negative effect on turnover intention, social support has a negative effect on turnover intention.
Research on Some Factors Affecting the Intention and Behavior towards Sustainable Consumption of Vietnamese Consumers
Authors: Linh Nguyen Thi Phuong , Huy Tran Le , Anh Nguyen Ngoc , Diu Tran Thi
Published: April 2022

This study investigates the factors affecting on sustainable consumption intention and behavior of Vietnamese customers by appling quantitative and qualitative approaches. Research data was collected from a survey of 551 consumers with diverse demographics and used to be processed with SPSS and Smart PLS software. Since then, the authors proposed a research model, in which sustainable marketing, environmental awareness, government policy were identified as major drivers for generating sustainable consumption intention and behavior. These findings have provided a direction for future studies on sustainable consumption behavior and created an initial foundation to help government and enterprise come up with solutions to promote this behavior in Vietnam.
Effect of Lateral Cyclic Loading on Screw Loosening in Morse Taper Implant-Straight Abutment Connection
Authors: Jalalian Ezatollah , Zarbakhsh Arash , Zare Sarvenaz , Karimi Pour Hamed
Published: April 2022

Background: Screw loosening is a common problem that can lead to mechanical and biological failure of dental implants. This study aimed to assess the effect of lateral cyclic loading on screw loosening (detorque value) in Morse taper implant-straight abutment connection.

Methods: This in vitro, experimental study evaluated 12 dental implants with Morse taper implant-abutment connection. Dental implant-abutment assemblies were mounted in transparent acrylic resin blocks with 45-degree angle relative to the acrylic surface. The abutment screw was torqued to 30 N/cm by a digital torque-meter and retorqued after 10 minutes. The assemblies were then randomly divided into two groups (n=6). In the test group, lateral cyclic loads with 75 N magnitude and 1 Hz frequency were applied at 45-degree angle relative to the longitudinal axis of the fixture. After 500,000 cycles, the detorque value was measured at the implant-abutment interface by a digital torque-meter. The assemblies in the control group did not undergo cyclic loading. The detorque values were compared between the two groups using the Student t-test (alpha=0.05).

Results: The mean detorque value was 23.17±1.33 N/cm in the control and 21.3±3.38 N/cm in the test group. According to the Student t-test, this difference was not significant (P=0.4).

Conclusion: According to the present results, application of lateral cyclic loads had no significant effect on screw loosening (detorque value) of Morse taper implant-straight abutment connection but insignificantly increased the torque loss.
Implementing Character Education and Behavior Improvement in Moroccan Secondary Schools
Authors: Hassine Rajaa
Published: April 2022

Character education has recently become an important area of concern and research among researchers and stakeholders in the field of education worldwide. The emergence of character education as an area of research, theory, and policymaking has been motivated by a generally noted increase of violence and misbehavior among students in educational institutions, which negatively affects the school environment and effectiveness as well as students’ performance, achievement and success. It has also been driven by the increasing awareness of the fundamental role and mission of education and educational institutions in instilling in learners the values and character traits of citizenship. In this context, the objective of this research is to investigate the impact of implementing character education and the improvement of students' behavior in Moroccan secondary schools. To collect data, the questionnaire and the semi-structured interview were used to elicit information from teachers and students on their opinions and perceptions of the impact of implementing character education programs and activities on students’ behavior improvement. The most important findings of this study confirm that character education does not constitute a mainstream practice in the classroom and its institutional context. In this respect, this article presents some suggestions to integrate effective character education programs in policy making, teachers training, and students’ life in the classroom and Moroccan school contexts.
Effects of Peer Tutoring on Pre-Service Teachers’ Physics Performance in Colleges of Education, Ghana
Authors: Osei-Himah Valentina , Parker Joseph , Naah Anna M.
Published: April 2022

At Atebubu College of Education, the study attempted to determine the impacts of peer tutoring on gender and senior High school background courses of pre-service teachers in physics. To achieve the purpose of the study an action research design was used and a total number of 140 (78 males and 62 females) who are offering primary Education program were purposively selected. The major research tools were accomplishment tests, which were used to collect quantitative data from pre-service teachers. Using the independent sample t-test and one-way ANOVA to analyse the quantitative data. It was found that the male students’ performance in Physics (M = 8.81, SD = 0.927) does not significantly differ from that of the female students’ (M = 8.65, SD = 0.925) as a result of the peer tutoring method adopted for the study. The results of the one-way ANOVA show that there are no differences in the mean score of the pre-service teachers’ performance in Physics and their senior High School course background. It is therefore recommended among other things that the principals and head of science departments of Colleges of Education in Ghana should organise workshops, seminars and in-service training on how to utilize peer tutoring method effectively in teaching scientific concepts to pre-service teachers they training.
Management Strategies for Children with Autism Spectrum Disorders in Mainstream Classrooms: Evidence from Selected Special Units in Lusaka Province of Zambia
Authors: Busiku Charity , Matafwali Beatrice
Published: April 2022

The study sought to establish management strategies and parental involvement in management of learners with Autism Spectrum Disorders in Special Units in Lusaka. A descriptive design using qualitative research approach was used to conduct the study. The sample consisted of thirty (30) participants comprising 6 school administrators, 12 teachers and 12 parents from 6 selected primary special schools and units and communities in Lusaka district. Purposeful sampling procedure was used to select school administrators, teachers, and parents. Interview guides and observation checklists were used as data collection tools. Data was then analyzed thematically. The study revealed that teachers mainly use individualized and group approaches. It was further revealed that a combination of management strategies are applied including: use of real sensory objects, music, ADL, ABC therapy, time-outs, games and counseling to foster learning, communication, social and behavioral development which however rarely used. However, involvement of parents was minimal and challenges such as lack of knowledge, specialised professionals, materials and resources, assessment, poor pre-service training, communication barriers, over enrolment, lack of multi-disciplinary approach among other challenges were major barriers to implementation of effective management. The study recommends continuous professional development for teachers and improved home school collaborations.
School-Based Teacher Motor Interventions for Pupils with Cerebral Palsy in Ghana
Authors: Twum Frank , Antwi-Danso Stephen
Published: April 2022

This paper presents the findings of a study that utilized three focus groups in unearthing school-based teacher motor skill interventions for pupils with cerebral palsy and related challenges in Ghana. Overall, 23 teachers (12 males; 11 females) selected through maximum variation sampling constituted the different focus groups. Whereas teachers implemented a number of motor skill activities for pupils with cerebral palsy on a daily basis, majority emphasized fine motor skill activities, utilized task-specific motor training strategies and applied explicit motor skill instructions. Teachers generally did not utilize the concept of stages of motor learning in their respective motor skill interventions. Furthermore, some teachers found implementing developmentally appropriate motor skill interventions challenging. It is recommended that teachers endeavour to incorporate more gross motor skill activities as they have the potential to boost fine motor skills. Again, teachers should incorporate implicit motor skill instructions in teaching motor skill activities to pupils with cerebral palsy as these pupils may have limited capacity for explicit motor skill instructions.
A Population-based Study of Temporal Lobe Malignancies
Authors: Gore Mitchell R.
Published: April 2022

Background: Temporal lobe malignancies can pose a challenge given the important functions of the temporal lobe including auditory and visual sensory processing, language recognition, and memory formation. This study aimed to utilize the 1973-2015 Surveillance, Epidemiology, and End Results (SEER) to identify demographic and treatment differences affecting overall survival in patients with temporal lobe malignancies.

Methods: A search of the SEER database for patients with malignant temporal lobe tumors was performed. The Kaplan Meier method was used to analyze univariate factors affecting overall survival. Logistic regression analysis was used to perform a multivariate analysis of overall survival.

Results: A total of 12,690 patients were identified. The male to female ratio was 1.5:1. The majority of patients were treated with surgery as part of their treatment regimen. On univariate analysis surgical vs. nonsurgical treatment, tumor histology, sex, and race significantly affected overall survival. On multivariate analysis race, sex, and surgical vs. nonsurgical treatment significantly affected overall survival.

Conclusions: Surgical treatment, non-white race, and female sex were associated with significantly increased overall survival in patients with temporal lobe malignancies.
Analysis of Gynecologic Cancer Management at Sanglah Hospital during COVID- 19 Pandemic
Authors: Winata I Gde Sastra , Darmawan Ngakan Ketut , Budiana I Nyoman Gede , Mahendra I Nyoman Bayu
Published: April 2022

The COVID-19 pandemic presents its own challenges in treating cancer, especially gynecological cancer. The condition of cancer patients who have been immunocompromised either because of their disease or side effects of the drugs given, has the potential to increase the risk of cancer patients to experience severe COVID-19 infection. The main management of cancer, which is based on three axes, namely surgery, chemotherapy, and radiotherapy, needs to be adapted to increase survival rates. rates in patients.
Diagnosis And Treatment of Benign Ovarian Tumors
Authors: Winata I Gde Sastra , Sabatini Ester Priskila , Purnomo Felisa Septantriva
Published: April 2022

The most common disorders of the ovaries are benign ovarian tumors which occur with an 80% incidence in women compared to malignancies. The incidence of benign ovarian tumors with cystic type in Indonesia in 2015 occurred as many as 23,400 people with a death rate of 13,800 people. In connection with this incident, there are several risk factors associated and the symptoms that occur are usually common such as gastrointestinal symptoms, urinary frequency, and constituent symptoms so that a proper diagnosis is needed by doing anamnesis, physical examination and supporting examinations. Supporting examinations can be done by ultrasound, MRI, X-rays and blood tests with tumor markers CA-125 where in malignant ovarian tumors, the tumor marker CA-125 increases, which is >35 IU/ml. Management of benign ovarian tumors is generally done through observation and also surgery depending on the degree of severity. The surgery that is usually performed is either partial surgery or radical surgery. Surgery is indicated if there are several indications such as cystic ovarian structures measuring more than 5 cm that have been observed for 6 - 8 weeks without regression, solid ovarian lesions, ovarian lesions with papillary vegetation on the cyst wall, and other indications as well.
Non-Tariff Barriers Challenge on Formation of Multilateral Trade Policy during the Covid-19 Crisis in the East African Trade Region
Authors: Olubandwa Beryl N. , Zamani Masoud
Published: April 2022

COVID-19 disrupted trade worldwide, causing supply and demand chain disruptions. As a result, trade volume dropped dramatically in the first half of 2020, forcing countries to implement new policies to defend their economies. The study revealed new Non-tariff barriers caused by COVID-19 into the East African region that prevented cooperation and effective negotiations. Without this consensus, the trade will not be able to flow freely. Trade negotiations aim to achieve the mutual reduction of barriers to trade among countries to lead to improved access to markets and stimulate economic growth. The study used inductive reasoning and an empiricist approach using a constructivist ontology to explain challenges informing multilateral trade policies during the Covid-19 crisis in Africa. The research adopted Chatham house rules to encourage participation and discussion. The study examined the challenges faced by policymakers in implementing old and new policies during the COVID-19 period and evaluated the East African countries' capacity to adopt multilateral trade policies, multilateral trade agreements, and multilateral cooperation within regional trade agreements, despite East Africa mechanisms, including the East African Community Elimination of Non-Tariff Barriers Act, 2017. NTB elimination mechanisms have proven ineffective, owing primarily to member country's political and nationalistic policies. NTBs can be effectively eliminated through legally binding systems, such as the COMESA taxing protocol, but all these measures are dependent on member states' cooperation. NTBs are complex and recurring in nature; there is a need for further research into the implementation and complexities of NTBs.
Freedom Bound by Constructed Values of Objects and Commodities
Authors: Salimian Salah , Shahriyari Iraj , Maeroufnezhad Ali
Published: April 2022

The concept of value is so wide that could be considered as synonymous with human life and existence. The human being is engaged in the evaluations of being by doing every act. Life is a value that even its ascetic denial is a kind of valuation. When the human being enters the world, in fact he enters a pre-valued world and many values weighed upon him. To what extent is man capable of emancipating from pre-existing values and to what extent can he succeed in creating value? The complex world today is very similar to the mythical world in which the blind and deaf valuing forces have overwhelmed and conquered human choices. It is here that human choices show a confusing and algebraic procedure, and freedom is as s chain that human being wrap around himself.
Macroeconomic Drivers and the Pricing of Uncertainty, Inflation, and Bonds
Authors:   Federal Reserve Bank of San Francisco, Bok Brandyn , Mertens Thomas M. ,   Federal Reserve Bank of San Francisco, Williams John C. ,   Federal Reserve Bank of New York
Published: April 2022

This paper analyzes a new stylized fact: The correlation between uncertainty shocks and changes in inflation expectations has declined and turned negative over the past quarter century. It rationalizes this fact within a standard New Keynesian model with a lower bound on interest rates combined with a decline in the natural rate of interest. With a lower natural rate, the likelihood of the lower bound binding increased and the effects of uncertainty on the economy became more pronounced. In such an environment, increases in uncertainty raise the possibility that the central bank will be unable to eliminate inflation shortfalls following negative demand shocks. As a result, the observed decline in the correlation between uncertainty and inflation expectations emerges. Average-inflation targeting policies can mitigate the longer-run effects of increases in uncertainty on the real economy.
"Relationship Between Land Surface Temperature and Imperviousness Density in The Urban Area of Iasi. "
Authors:   Faculty of Geography and Geology, Alexandru Ioan Cuza University of Iași., CREȚU Claudiu , ICHIM Pavel ,   Faculty of Geography and Geology, Alexandru Ioan Cuza University of Iași., SFÎCĂ Lucian ,   Faculty of Geography and Geology, Alexandru Ioan Cuza University of Iași., BREABĂN Iuliana-Gabriela ,   Faculty of Geography and Geology, Alexandru Ioan Cuza University of Iași.
Published: April 2022

This study aims to quantify the relationship between Land Surface Temperature (LST) and Imperviousness Density (IMD) in Iași. This was done through linear regression analysis which involves quantifying the relationship between one independent variable (explanatory, predictor) and one dependent variable (response). Thus, in our study, the dependent variable is represented by the LST product obtained through MODIS sensors in the period 2014-2018, while the independent variable is represented by IMD. The coefficient of determination (R2) obtained, higher than 0.5 for most of the year, indicates a statistically significant relationship between LST and IMD. The highest values of R2 are identified during the day spring and summer seasons. Thus, 70% and respectively 80% of the spatial variation of LST is explained by the distribution of IMD during these two seasons and the regression coefficients indicate, on the one hand, that the relationship between the two variables is a direct one (LST values increase at the same time with IMD values), and on the other hand, that the increase of LST corresponds to a gradient between 0.3-0.6 oC per 10% IMD. During the day, the lowest values of R2 appear in autumn and winter seasons, as a result of the local topography that facilitates the frequency of thermal inversions in this period of the year. On the other hand, during the night, R2 has values between 0.40 and 0.60, with the lowest values in the autumn season and the highest in the spring season, respectively.
Heatwaves in Romania -Frequency and Duration
Authors:   ", GIURGIU Diana-Alexandra ,   University of Bucharest – Faculty of Geography – Doctoral School „Simion Mehedinți-Nature and Sustainable Development”"
Published: April 2022

Heatwaves are recognized, although there is still no general acknowledged definition, as periods of unusually hot and dry or hot and humid weather, which occur gradually and cease in the same way, lasting at least 2 to 3 days with visible impact on human activities. Episodes characterized by heatwaves induce excessively hot weather compared to the local climatic specific features. The period with or without heatwaves is different from a region to another, depending on the particularities of each area. This climatological hazard can be described as an advection of tropical air mass which, compared to the climatological standards, leads to reaching large positive temperature deviations, that in some cases will set new thermal records. In the northern hemisphere, in the area of temperate latitudes, which includes Romania, the highest values of air temperature are generally recorded from mid-June to the end of August. Heatwaves in Romania are mainly generated by the advection of continental hot air masses from North Africa, leading to a stable stratification of the atmosphere from ground levels to more higher ones. The ridge of the North African anticyclone extends either over Central Europe or Central Eastern Europe, up to Romania, generating heatwaves for the first scenario in the western regions of our country, whereas or the second one outside the Carpathians, most frequently in the Romanian Plain. In Romania, the most frequent heatwaves, taken by duration in time are those between 2 and 5 days. while analysed in terms of intensity, stand out those during summer months (June to August).
"The Analysis of The Fog Phenomenon Frequency in The Urban Areas of The Romanian Plain"
Authors:   Romanian Academy, Institute of Geography, 023993, Bucharest, Romania, HAVRIŞ Loredana-Elena
Published: April 2022

The present study investigates the frequency with which the fog phenomenon occured in the urban areas of the Romanian Plain, between 1961-2007 through a detailed statistical analysis of its monthly, annually and seasonally levels. The main purpose is to highlight the differentiated exposure of selected cities to the occurence of this type of climatic hazard whose territorial distribution is closely dependent on the presence of evaporation sources in the region and which contributes to its intensification. In this sense, the relative air humidity ≥80% at 1 p.m. was also taken into account, so that the cumulative contribution of the two analzyed climatic parameters showed a high predisposition to the occurence of the fog phenomenon in general and especially in the cold season of the year. Although the evolution trends of the fog phenomenon are generally declining, there is the possibility of occurence of higher values than those registered for all the analyzed urban ecosystems
"Flood Modeling Based on The Precipitation Data by Using Hec-Ras Software Version (5.0.7)."
Authors:   ", ZİYA KAYA Yunus ,   Osmaniye Korkut Ata University, Faculty of Engineering, Department of Civil Engineering, 80100, Osmaniye, Turkey", ÜNEŞ Fatih ,   "Iskenderun Technical University, Faculty of Engineering and Natural Sciences, Department of Civil Engineering, 31200, Iskenderun, Hatay, Turkey", DEMİRCİ Mustafa ,   "Iskenderun Technical University, Faculty of Engineering and Natural Sciences, Department of Civil Engineering, 31200, Iskenderun, Hatay, Turkey"
Published: April 2022

Floods are one of the most destroyable disasters that affect human life directly. It is important to model floods for the determination of the vulnerable areas, and planning of the dangerous zones. For this purpose, HEC-RAS software is in use to create complex flood models. In general, for the modeling of a flood by using any software, an accurate topography of the area, boundary conditions, Manning coefficients, and the flow data are essential. However, it is not always possible to have the flow rate of all streams located in the study area. Because of the mentioned reason, in this study authors preferred to directly use precipitation data for modeling the flood. A model was created by using SRTM satellite data for the digital elevation model. A two-dimensional geometry was created, and the precipitation data was added to the model. The main output of the performed model showed that using precipitation data directly on a flood model is not fully representative of the extent of flooding. According to the model result, the flood is spread over a wider area than it actually was.
"Advance Hydraulic Calculation of Fish Ladders, Sebesel River, Romania."
Authors:   ", BEILICCI Robert Florin ,   Hydrotechnics Department, Civil Engineering Faculty, Politehnica University of Timisoara, Timisoara, Spiru Haret 1A, 300022, ROMANIA", BEILICCI Erika Beata Maria ,   "Hydrotechnics Department, Civil Engineering Faculty, Politehnica University of Timisoara, Timisoara, Spiru Haret 1A, 300022, ROMANIA"
Published: April 2022

Sebesel 2 hydropower development is located on the Sebesel river, in the outskirts of Borlova, Caraș - Severin County. The realization of the fish ladder will not influence the flow regime of surface or groundwater in the neighboring area. The fish ladder is dimensioned to allow the migration of the ichthyofauna upstream during the spawning period and the partial transit of the alluviums as well as the downstream provision of a servitude flow Q = 0.066 mc / s. The Sebeșel 2 hydroelectric power plant is a hydropower arrangement by shunt without accumulation lake. The plant has 2 (two) power groups equipped with Pelton turbines. The power delivered by MHC Sebesel 2 is 792.31 kW. The installed flow rate is 0.80 m3 / s gross fall: 120 m capture rate 573 mdMN. The fish ladders are of the technical ladder type with pools. The objectives of the studies were: to describe the qualitative and quantitative structure of benthic invertebrate and fish macro communities assessment of the ecological status of the rivers in the areas of hydropower development highlighting the presence of fish species of conservative interest and assessing the status of their populations. The methodology was carried out in accordance with the provisions of the Water Framework Directive, Annex V used considered the following: Assessment of the status of aquatic communities description of the structure of fish communities assessment of the ecological status of the river sectors. The study led to obtaining some essential information for the exploitation and maintenance of the micro-hydroelectric plant as well as the fish ladder.
"Dynamic Limnology Between Actors and Managements"
Authors:   ", BERNIER Maximilien ,   PhD student, EA 1210 CEDETE - Laboratory of Geography, University of Orleans, 10 rue de Tours, 45 065 Orléans Cedex 2 (France).", BARTOUT Pascal ,   "Senior Lecturer, EA 1210 CEDETE - Laboratory of Geography, University of Orleans, 10 rue de Tours, 45 065 Orléans Cedex 2 (France).", TOUCHART Laurent ,   "University Professor exceptional class, EA 1210 CEDETE - Laboratory of Geography, University of Orleans, 10 rue de Tours, 45 065 Orléans Cedex 21 (France). "
Published: April 2022

The subject proposed in this article concerns the intersection of the hydrodynamics of lakes and ponds with the economic development of their territory. It will be a question of understanding the interactions between these water bodies and territorial actors evolving on these limnic territories. Different managements are therefore imposed on each of the parties present. These managements are organized according to the limnological mechanisms specific to each environment (ponds and lakes), their temporality, their spatiality, and their risks for the human activities integrated into these water bodies. We will focus in this article on water and sediment movements not yet studied to interact with local managements. These phenomena constitute a base on which the actors around these water bodies can rely to guide the measures used to protect their activities. The purpose of this article is to provide scientific insights for decision support to actors evolving in the federation of municipalities of the Great Lakes, in the Landes, in New-Aquitaine (France).
Detection of Vineyard Diseases Using the Internet of Things Technology and Machine Learning Algorithms.
Authors:   Beia Consult International, Bucharest, Romania, RD Department, ROȘCĂNEANU Roxana , STRECHE Robert ,   Beia Consult International, Bucharest, Romania, RD Department, OSIAC Filip ,   Beia Consult International, Bucharest, Romania, RD Department, BĂLĂCEANU Cristina ,   Beia Consult International, Bucharest, Romania, RD Department
Published: April 2022

In recent years, the Internet of Things concept has rapidly spread in most fields because of the benefits it offers, motivating viticulturists to implement new technologies that increase crop production and quality, as well as streamline production costs. The study’s purpose is to monitor, using Internet of Things technology, two methods of identifying vine-specific diseases, which can be determined by environmental conditions (temperature, humidity, rainfall) or by analyzing diseased leaves from the vine. The first method is associated with a field study that involves placing Internet of Things sensors inside crops to measure environmental and plant parameters, which are then sent and stored in the Cloud. Based on these parameters, a correlation is made with the values that determine the occurrence of a specific vine disease (powdery mildew, downy mildew, and grey rot). The second method involves the use of Unmanned Aerial Vehicle imaging to take images containing healthy and diseased leaves from different parts of the vine. To analyze these images, a web page has been developed integrating a machine learning algorithm that detects the leaf state from the drone image footage. After the analysis all the values are stored in a database and the results are displayed as graphs and charts that are visualized by the viticulturist so that he can take the necessary actions. This study is an important step in the implementation of Internet of Things technology in viticulture, helping to monitor the main environmental and plant parameters, as well as detecting the occurrence of diseases among the vine cultures.
"Advanced Hydroinformatic Tools for Modelling of Associated Processes with Water Quality. "
Authors:   ", BEILICCI Erika ,   Hydrotechnics Department, Civil Engineering Faculty, Politehnica University of Timisoara, Timisoara, Spiru Haret 1A, 300022, ROMANIA", BEILICCI Robert ,   "Hydrotechnics Department, Civil Engineering Faculty, Politehnica University of Timisoara, Timisoara, Spiru Haret 1A, 300022, ROMANIA"
Published: April 2022

Water quality expresses the suitability of water to sustain various uses or processes: water for drink, food production, irrigation, animal husbandry, fishermen, recreation etc. Each use will have certain requirements for the physical, chemical or biological characteristics of water. The quality and composition of surface and underground waters is determined by natural factors (geological, topographical, meteorological, hydrological and biological characteristics of catchment) and by human activity (industrial wastes, sewage, runoff from farmland, cities, factory effluents, different hydrotechnical arrangements etc.). The evolution of water quality is also determined by the processes that take place in water bodies: chemical (neutralization, oxidation, reduction, flocculation, precipitation, adsorption, absorption, photochemical decomposition), physical (dilution, mixing, diffusion, sedimentation, coagulation, dissolution of oxygen, release of gases into the air, also influenced by solar radiation IR and UV, water temperature), biological (by its own biocenosis that competes with foreign elements, either directly, by lytic action (bacteriophages), filtration (shells), consumption (by protozoa) or the secretion of toxic substances for intruders (actinomycetes) and biochemicals (within the cycles of nitrogen, sulfur and carbon, based on the activity of specific microorganisms)). In this context, modeling the evolution of water quality is of particular importance for efficient water management. For the best possible forecast of water quality, the use of advanced hydroinformatic tools, such as the MIKEby DHI (Danish Hydraulic Institute) software package, is needed. The paper presents the possibility of using these tools and conducts a case study on a sector of the Bega River, downstream of Timisoara.
" Estimation of Reference Evapotranspiration Using Support Vector Machines: a Case Study of Adana, Turkey. "
Authors:   Civil Engineering Department, Iskenderun Technical University, Iskenderun, TURKEY, DEMIRCI Mustafa , TASAR Bestami ,   Civil Engineering Department, Iskenderun Technical University, Iskenderun, TURKEY, KAYA Yunus Ziya ,   Civil Engineering Department, Osmaniye Korkut Ata University, Osmaniye, TURKEY, VARCİN Hakan ,   Civil Engineering Department, Iskenderun Technical University, Iskenderun, TURKEY
Published: April 2022

Evapotranspiration is an important parameter in hydrological and meteorological studies. Evapotranspiration forecasting plays an important role in irrigation management and hydraulic designs, especially during dry periods. In this study, average temperature (T), relative humidity (RH), wind speed (U), solar radiation (SR) parameters were used to estimate the daily evapotranspiration amount. Daily evapotranspiration estimation (ET0) was made according to the Penman-Monteith method recommended by FAO (Food and Agriculture Organization) as a standard method. The Penman-Monteith method was considered as the reference equation. Support Vector Machines (SVM) methods with four different input combinations were used to estimate the daily evapotranspiration of Adana province. SVM models were compared with each other and the reference equations’ results. According to the results obtained from SVM models, SVM3 model giave slightly better results according to the higher determination coefficient and lowest error data.
The Thermal Water in Bihor County and its Benefits for Treating Arthritis. A Case Study: Băile 1 Mai Resort.
Authors:   ", CIURBA PASTOR Anca-Paula ,   University of Oradea, 1 University Street, 410 087 Oradea, Romania  University of Lorraine, LOTERR-EA7304, Île du Saulcy, 57045 Metz, France", HAIDU Ionel ,   Professor, University of Lorraine, Laboratory LOTERR-EA7304, Île du Saulcy, 57045 Metz, France, GACEU Ovidiu ,   "Professor, Faculty of Geography, Tourism and Sport, University of Oradea, 1 University Street, 410 087 Oradea, Romania", BIRIȘ MATEI Mihaela ,   "PhD student, Doctoral School in Geography, University of Oradea, 1 University Street, 410 087 Oradea, Romania"
Published: April 2022

Due to the existence of important thermal water resources, in Bihor County there are many locations where thermo-mineral waters are used for bathing or for leisure. In this study, we focus on the spas in Bihor County (Băile Felix, Băile 1 Mai, Băile Tinca, Stâna de Vale, to which we add the village of Sarcău), where these waters have been used for a long time and which have the necessary infrastructure for therapy. Thus, we aim to highlight the particularities of these waters, the presentation of the balneotherapy procedures used and the emphasis on the beneficial effects of balneotherapy on osteoarthritis (most of the pathologies treated here are osteoarthritis). In the spa treatment bases, along with thermal water, other procedures are used that enhance the effect of these waters (physiotherapy, TENS (transcutaneous electrical nerve stimulation), TCARE (capacitive and resistive electrical transfer), therapeutic massage, lymphatic drainage massage, ultrasound, electrotherapy, low frequency electromagnetic pulse therapy, galvanic baths, paraffin wraps, laser therapy). The main pathologies treated by the mentioned procedures are inflammatory rheumatic diseases, neuromuscular diseases.
Operations on greedoids
Authors:   Yarmouk University, Department of Mathematics,  Irbid, Jordan, Al-Hawary Talal Ali
Published: April 2022

We explore the operations of deletion, contraction, direct sum and ordered sum of greedoids. Moreover, we introduce the notion of balanced greedoid and give a necessary and sufficient condition for the direct sum and ordered sum of balanced greedoids to be balanced.
Least primes which split in imaginary quadratic fields
Authors:   Université Cheikh Anta Diop, Departement de Mathematiques, Sénégal, Alkabouss Sakha A. , Benseba Boualem ,   Université des Sciences et de la Technologie Houari Boumediene, Faculté de Mathematique, Algiers, Algeria, Kihel Omar ,   Brock University, Department of Mathematics and Statistics, St. Catharines, Canada, Larone Jesse ,   Brock University, Department of Mathematics and Statistics, St. Catharines, Canada
Published: April 2022

We bound the least primes which split in an imaginary quadratic field in terms of its class number.