bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Operation Time of Sprinkler by RTI Value
Authors: Kim Seo-Young, , Kong Ha-Sung,
Published: June 2023

In this study, a scenario was developed and studied to find out the change in the operation time of the sprinkler head according to the difference in the RTI value of the sprinkler head in the event of a fire in a partitioned space. The simulation results of the operation time according to the change in the RTI value of the sprinkler head are as follows. As a result of analyzing the operation time of the sprinkler head for each scenario, it was confirmed that the lower the RTI value, the faster the operation time, and in the case of Scenarios 2 and 3, the change of the RTI value is not significant, either. Also, the sprinkler head in the same position did not operate at the same time because the sprinkler head near the window position was slower. Therefore, it was confirmed that the sprinkler head with a low RTI value should be used in places with high risk when a fire occurs, and that the sprinkler head should be installed in a position where the wind effect is insignificant.
Analysis of Foot Traffic due to COVID-19 using Mobile Network Big Data
Authors: Lee A-Jeong , Park Tae-Rang , Jwa Jeong-Woo
Published: June 2023

The COVID-19 pandemic has hit the tourism industry with a drop in the number of domestic and foreign tourists and loss of revenue. We can prepare for future pandemics by analyzing the impact of COVID-19 on tourist numbers before and after the outbreak. In this paper, we analyze the change in the foot traffic of tourists and resident population before and after the outbreak of COVID-19 using mobile communication company call records (CDR) and WiFi access log data. Analysis of changes in the foot traffic due to COVID-19 is analyzed based on the number of confirmed cases, recoveries, and deaths by administrative dong, daily, and gender. The hierarchical cluster analysis of distribution population for administrative dongs (classified as k = 5 clusters) was performed to classify areas with high changes in foot traffic due to COVID-19. We also predict the change in the foot traffic due to the epidemic using the Xgboost (Extreme Gradient Boosting) algorithm.
Study on Xiurong academy landscape based on regional culture
Authors: Mu Hongna , Wang Yan , Sun Taoze , Liu Lei
Published: June 2023

Regional culture has been regarded as the historical record of human activities and the carrier of the cultural inheritance of a particular region during the past decades. The unique regional culture of Shanxi had influenced the landscape construction of Xiurong Academy. In this paper, research of the regional cultural perspective on the overall layout of Xiurong Academy, the creation and analysis of characteristic regional landscapes, and the cultural and garden landscapes of the academy has been conducted through literature research, field research, and other methods. The results show that Xiurong Academy has high reference value in the layout of the academy, historical culture, architectural characteristics, and landscape features of the academy in northern Shanxi. The landscape construction of Xiurong Academy conforms to the regional characteristics of its location. Its unique detailed design is reflected in the architecture, courtyard layout, and plant construction of Xiurong academy. It is valuable to provide some reference for the scientific protection and utilization of Xiurong Academy, even for other similar landscape research through our research to uncover and illustrate its building structure and plant landscape.
Development of bio-strip based test for ascertain proper milk pasteurization
Authors: A Mangroliya Parita , Hazra Tanmay , G Sindhav Rohit , K Ahuja Kunal , Prasad Subash
Published: June 2023

Alkaline phosphatase (ALP) enzyme is naturally present in raw milk which is used as a prominent indicator to determine proper pasteurization in milk. However, determination of ALP activity in milk either time-consuming or required sophisticated instrument facilities that are uncommon in India's rural dairy or collection centers. Present test is based on the ALP reaction with p-nitrophenyl phosphate to release p-nitrophenol and inorganic phosphate in the presence of water. When p-nitrophenol reacts with a certain chromogen, the strip's colour changes from purple to grey, which may be seen with the naked eye. This strip has a nine-month shelf life at room temperature.
Employment status and coping strategies of renal patients on hemodialysis
Authors: Cruz-Flores Maria Adriana Cecilia
Published: June 2023

Chronic Kidney Disease is a disabling and high-cost chronic disease for patients who suffer from it and their families. When it manifests itself at a productive age and people are active at work, permanence in employment is at risk and the world of life of the patient’s changes in the face of physical damage, constant absences from the workplace, derived from medical consultations, studies and relapses; as well as secondary effects of renal replacement therapy. Faced with this situation, kidney patients of productive age who receive hemodialysis face multiple stressors in their day-to-day life to remain active in the workplace and economically independent. For this reason, they often resort to mechanisms and alternatives to deal with the disease and preserve their employment, autonomy, self-esteem, as well as control over them and the disease. The objective of this research is to describe, based on the experiences of a group of kidney patients of productive age who receive hemodialysis, the coping strategies they use to face the disease, recover their autonomy, self-esteem and control over them and the disease and continue to be active at work, either formally or on their own.
Epidemiología y manejo de las fracturas de fémur por arma de fuego. Nuestra experiencia
Authors: Taboadela Fernando Javier , Mantella Gorosito Daniela , Borre Florencia , Narváez Fabián
Published: June 2023

Introducción: Cada vez con más frecuencia, la población civil sufre lesiones por proyectil de arma de fuego. El 57% de los pacientes presenta compromiso óseo y la fractura de fémur es la más común. La elevada incidencia y la ausencia de un protocolo estandarizado para su tratamiento motivaron este estudio.

Materiales y Métodos: Estudio retrospectivo, descriptivo. Entre 2019 y 2021, se incluyeron pacientes con fracturas de fémur causadas por arma de fuego. Se analizaron las siguientes variables: región anatómica involucrada, clasificación, tratamiento y complicaciones.

Resultados: La muestra incluyó a 35 pacientes, 25 (71,43%) con fracturas completas y 10 (28,57%), con fracturas incompletas. Según la localización, el fémur distal fue la zona más afectada (48,57%). Veintiséis pacientes fueron tratados mediante reducción y osteosíntesis y 9, de forma incruenta.

Conclusiones: Recurrimos a una clasificación sencilla que divide a las fracturas en completas o incompletas. Todas las fracturas completas se consideraron inestables independientemente de su localización; y las incompletas, estables, salvo las del tercio proximal, donde es conveniente realizar una fijación profiláctica. Las fracturas diafisarias incompletas pueden tratarse de forma incruenta y todas las fracturas completas se trataron con reducción y osteosíntesis. El clavo endomedular es el método de elección para las fracturasen las zonas I y II. En la zona III, se requiere un análisis individualizado para cada patrón. Creemos que el manejo inicial y la correcta selección del implante según la zona afectada son factores determinantes para lograr resultados satisfactorios.
Residencias de Ortopedia y Traumatología en la Argentina
Authors: Pelaez Carlos Roberto
Published: June 2023

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Educação integrada e adoecimento estudantil na Educação Profissional e Tecnológica
Authors: Silva Marcel Freire da , Dias Vagno Emygdio Machado
Published: June 2023

O trabalho propõe analisar as percepções dos estudantes da Educação Integrada acerca dos processos de adoecimento estudantil que se apresentam no cotidiano escolar da Educação Profissional e Tecnológica. A pesquisa possui caráter exploratório e procura desvelar as tensões e distensões no cotidiano escolar a partir da visão dos estudantes. Os procedimentos metodológicos foram compostos de análise documental, questionários e entrevistas com estudantes da educação integrada. O Produto Educacional desenvolvido diz respeito ao processo de intervenção ou metodologia investigativa na forma de “rodas de conversa” com o uso da metodologia de grupos focais, como meio propício para dar voz e ouvir aos estudantes, considerando sua inerente singularidade antropológica juvenil e estudantil.
PRONATEC
Authors: Frade Denilza Silva , Santos Maria Helena
Published: June 2023

O artigo retoma um debate que acreditamos ter ficado inconcluso na academia em que muito foi dito sobre suas finalidades e importância, mas sem o aprofundamento Acesso ao Ensino Técnico e Emprego (Pronatec). Por isso, é necessário retomar este debate à luz dos estudos da avaliação de políticas públicas e do papel do Estado como indutor do desenvolvimento social. Como ponto de partida, compreendemos que o Pronatec não foi somente um programa de qualificação profissional, ao contrário, ao se articular com outros programas de educação, ocupou um papel estratégico para a educação profissional no Brasil, inclusive para institucionalizar o sentido da Rede Federal de Educação Profissional, Científica e Tecnológica (RFEPCT).
Influence of Maximal Strength on Bench Press and Trunk Rotation in Adapted Shot-put: A Pilot Investigation
Authors: Soares Denise , Lourenço Joana , Silva Ana Filipa , Flôres Fábio
Published: June 2023

PURPOSE: Shot-put is a complex ballistic movement that involves segments’ translational and rotational motions. Its goal is to release the shot at maximum forward velocity (strength) at an angle of approximately 40º (rotation). Considering the adapted shot-put, those two components could be more limited in action. Therefore, the present study aimed to examine the correlations among the one-repetition maximum (1RM) test in the bench press (BP1RM) and trunk rotation (TR1RM) and the throwing distance of the adapted shotput and body composition (Fat mass and Fat-free mass [FFM]), and the throwing distance of the adapted shot-put (TD) and 1RM results.METHODS: Eighteen non-professional athletes were evaluated, and their anthropometric data were obtained (bio-impedance measurements). Afterward, the participants performed the BP1RM and TR1RM exercises. Finally, they performed the adapted shot-put in similar conditions as the official competitions, where three trials of ASP were performed, and the best of these trials were assessed.RESULTS: The results showed a significant relationship between the throwing distance and 1RM results for both exercises (BP1RM (p=.040) and TR1RM (p=.002)) and with the amount of FFM (p=.045). Concerning FFM relationships, the results showed a positive relationship with both 1RM exercises (BP1RM (p=.034) and TR1RM (p=.003)). The Fat Mass results demonstrated an inverse correlation only with BP1RM (p=.035).CONCLUSIONS: The results suggest that physical preparation, including BP1RM and TR1RM exercises, are fundamental to improving adapted shot-put performance. This showed preliminary indicators of which variables may influence the adapted shot-put that might help coaches and athletes to improve their performance. Nevertheless, those results should be carefully considered since the movement evaluated was very complex, especially when performed by participants unfamiliar with them, and because the same analysis included both sexes.
Neurovascular Interaction and Exercise Training for Bone Regeneration
Authors: Lee Seungyong
Published: June 2023

The nervous and vascular systems are widely distributed in the skeletal system and play an important role in bone metabolism and bone formation, respectively. Their independent impact on the skeletal system has received keen attention in bone-related research over the decade. However, the mechanism of neurovascular coupling during physiological bone remodeling and regeneration has recently been highlighted, considering the importance of spatial relationships between bone-associated skeletal nerves and blood vessels. In addition, the positive effect of exercise on the bones has been continuously emphasized, as evident by the improved number and function of skeletal nerves and blood vessels following exercise training. Skeletal nerve-vascular crosstalk and exercise training are essential for bone development and regeneration, respectively; however, the effect of exercise on neurovascular interactions has not yet been studied. This review aims to summarize the regulatory roles of the nerves and blood vessels in bone metabolism and regeneration and to highlight a combination of potential cellular processes of neurogenesis and angiogenesis in bone regeneration. Moreover, given the significance of the spatial relationship between nerves and blood vessels in bones and the role of exercise training, this review aims to discuss the potential physiological neurovascular coupling that occurs following exercise and physical activity.
Effects of Resistance Exercise Training on Aged Skeletal Muscle: Potential Role of Muscle Stem Cells
Authors: Kim Dong-Il , Kang Nyeonju , Park Young-Min
Published: June 2023

PURPOSE: The prevalence of sarcopenia, which can lead to disability, hospitalization, and death, is increasing among older populations. Resistance exercise training (RT) is currently the most effective strategy for combating sarcopenia by stimulating hypertrophy and increasing strength. This review describes the underlying mechanisms of aging skeletal muscle and whether RT attenuates aging-related loss of muscle function and mass.METHODS: We reviewed and summarized previous research using PubMed, Science Direct, and Google Scholar databases.RESULTS: Load-induced muscle growth is a complex phenomenon that depends on various physiological systems and signaling pathways. Muscle growth occurs through signaling events arising from mechanical stress and consequent muscle protein turnover controlled by the balance between protein synthesis and degradation, which is negatively affected by aging. The authors used the myonuclear domains mediated by muscle satellite cells to explain the molecular machinery of exercise-induced muscle growth and recovery in aging muscles.CONCLUSIONS: Despite a blunted molecular response to an exercise bout, aging muscle cells demonstrated remarkable plasticity, with substantial improvements in myofibril size and strength during RT. More studies are necessary to elucidate the specific mechanisms by which RT activates muscle satellite cells and mitogenic and myogenic signaling in aged muscles.
Lojistikte İtme-Çekme Stratejisinin Önceliklendirilmesinde Bütünleşik Yöntem Önerisi: İzmir Alsancak Limanı ile Kemalpaşa Lojistik Üssü Örneği
Authors: YILDIZ Kürşat , BAŞARAN Volkan , YERLİKAYA Mehmet Akif
Published: June 2023

Araştırmalar, üretim ve envanter yönetimi alanında itme-çekme stratejilerinin büyük öneme sahip olduğunu ve lojistik süreçlerde kritik bir rol oynadığını göstermektedir. Üretim sürecinde zaman ve kaynak tasarrufu sağlamak amacıyla çeşitli itme-çekme stratejileri geliştirilmiştir. Şirketleri etkileyen en önemli kriterleri belirleyerek, en uygun stratejiyi seçme hedefi üzerinde durulmaktadır. Bu çalışma, İzmir'deki 13 Organize Sanayi Bölgesi (OSB)'nde yer alan 47 farklı şirket için itme-çekme stratejilerine yönelik belirlenen kriterlerin önceliklendirilmesine odaklanmıştır. Kriterler, genel kriterler, itme kriterleri ve çekme kriterleri olmak üzere üç kategoride değerlendirilmiştir. OSB'nin üretim faktörlerine göre maksimum faydayı sağlayan kriterlerin değerlendirilmesi ve bu kriterler arasındaki ilişkilerin analizi için CRITIC (Criterion-Induced Weighting for Technique for Order Preference by Similarity to Ideal Solution) ve DEMATEL (Decision Making Trial and Evaluation Laboratory yöntemlerini içeren entegre bir yaklaşım önerilmiştir. DEMATEL yöntemi, anket yanıtlarına dayalı ikili karşılaştırmalar gerçekleştirmek için kullanılırken, CRITIC yöntemi anket yanıtlarının çelişki analizini yapmak için kullanılmıştır. Bu çalışmanın amacı, DEMATEL yöntemi ile elde edilen ağırlık değerlerini CRITIC çelişki analizi ile dengelemektir. Ayrıca, DEMATEL yöntemiyle kriter ağırlıklarının hesaplanması için yeni bir yaklaşım önerilmiştir. Bu iki yöntemden elde edilen ağırlık değerleri ile hibrit ağırlık değerleri elde edilmiştir. Entegre yöntemden elde edilen sonuçlara göre, en önemli kriterler; genel kriterler arasında en yüksek ağırlığa sahip olan "Doğru Miktarlarda Teslimat", itme kriterleri arasında en yüksek ağırlığa sahip olan "Süreçte Ürün Yeterlilik Durumu" ve çekme kriterleri arasında en yüksek ağırlığa sahip olan "Üretimde Aksaklık" olarak belirlenmiştir. Bu çalışma, İzmir'deki şirketler için itme-çekme stratejilerinin belirlenmesine yönelik önceliklendirilmiş kriterler sunarak, lojistik süreçlerin iyileştirilmesine ve şirketlerin rekabet gücünün artırılmasına katkı sağlamayı amaçlamaktadır. Bu bağlamda, çalışma şirketlerin operasyonel maliyetlerini azaltma, üretim süreçlerini optimize etme ve tedarik zinciri performansını artırma gibi hedeflere ulaşmalarına yardımcı olabilir.
Do Conflicts Strengthen My Relationship?’ The Role of Relational Resilience on Conflict Frequency and Relationship Satisfaction from the Viewpoint of Turkish Women
Authors: KAYGAS Yasemin , ÖZBAY Yaşar
Published: June 2023

This study sought to determine whether relational resilience plays a role in the relationship between women's conflict frequency and relationship satisfaction. The sample of the study consisted of 255 Turkish women over the age of 18 who had at least one child. The data collection instruments used were the " Conflict Zone Determination Scale" the "Relationship Stability Scale" the "Relational Resilience Scale" and the "Personal Information Form" developed by the researcher. SPSS 25.0 and Hayes's macro PROCESS 4.0 were used to analyze the data. As a result of the analyzes, it was found that there were low negative significant relationships between conflict frequency and relationship resilience, high positive relationships between relationship resilience and relationship satisfaction and low negative significant relationships between conflict frequency and relationship satisfaction. As a result of this research, it was found that conflict frequency predicted relational resilience, relational resilience predicted relationship satisfaction, and conflict frequency predicted relationship satisfaction. At the same time, relational resilience was found to play a mediating role in the relationship between conflict frequency and relationship satisfaction.
School Resilience: A Scale Adaptation Study
Authors: ÇETİNKAYA Ali , HASKAN AVCI Özlem
Published: June 2023

This study aimed to adapt the School Resilience Scale (Caleon& King, 2020) to Turkish culture. The participants of this study were high school students. The study consisted of three stages. The first stage regarded the scale translation for linguistic equivalence. In the second stage, the structural validity and reliability of the scale were tested. In the third stage, a test-retest reliability of the scale was performed. Fifty-three students (52.8% girls) participated in the first group, 615 students (52.7% girls) in the second group, and 88 students (67% girls) in the third group. The confirmatory factor analysis (CFA) findings to test construct validity showed that the four-factor structure of the scale had an excellent fit index. Next, a two-level confirmatory factor analysis was conducted, which confirmed the two-level model. The Cronbach's Alpha reliability coefficient for the total scale was .89, while it was between .78 and .84 for the sub-dimensions of the scale. In sum, the findings evidenced that the school resilience scale was a valid and reliable measurement tool that can be used to assess Turkish high school students' school resilience.
The concept of signal: its definition and philosophical using
Authors: Dumov Alexander V. , Zaitseva Natalya V.
Published: June 2023

The article contains an examination of the definitions of the concept of signal accepted in engineering and technical contexts in terms of content. The author analyzes the existing ways of dealing with this concept and describes the features of the situations of its application. He explores the question of the necessary terminological tools to describe the impact of a signal on a system. The possibilities of using the means of the theory of signals for the naturalization of philosophical studies are evaluated on the example of specific studies. The author concludes about the methodological significance of the means of signal theory and the appropriateness of involving signal models in the context of considering philosophical problems, as well as the role of philosophy in relation to the sciences that study signal processes.
The phenomenon of rationality in the context of cultural and historical analysis
Authors: Khodykin Vladimir V. , Stotskaya Tatyana G.
Published: June 2023

The proposed article analyzes the phenomenon of rationality, mainly in the cultural and historical context in the process of academic research. Rationality is positioned as a universal component of any research process. Attention is focused on the fact that the phenomenon of rationality in itself within the cultural and historical context in the aspect of methodological research has not yet been clearly developed. In turn, the multidimensional nature of cultural and historical development contributes to the research interest in the phenomenon of rationality as a comprehensive full-scale form of demonstration of social experience in the intentional consciousness of the subject of reflection.
Use of a high-efficiency bimetallic recuperator of micro gas turbine units with the power of under 100 kW
Authors: Chu V.Ch. , Rassokhin Viktor A. , Barskov Viktor V. , Matveev Yury V. , Laptev Mikhail  A. , Basati Panah Mehdi
Published: June 2023

BACKGROUND: Modern micro gas turbine units (MGTUs) with the power of dozen of kilowatts are single-shaft and recuperative. Being in the position where improvement of new MGTU cycles is being studied, it is necessary to choose optimal parameters of the MGTU cycle according to the scheme with regeneration when developing such simple units with the aim of ensuring small size and efficiency. Nevertheless, there are several practical restrictions for the development of recuperators, related to the issue of complicated designs together with pressure losses increase caused by regeneration degree increase and to the restriction of materials quality.
AIMS: Study of influence of a recuperator on efficiency of the MGTU, as it is essential for the development of MGTUs.
METHODS: As a part of the study, the overall assessment of the influence of recuperators on parameters of an ordinary Brayton cycle with recuperation is presented in the article. The influence of main parameters, including degree of pressure increase in a compressor, inlet gas temperature and regeneration degree, on MGTU efficiency is considered in depth in the article.
RESULTS: According to the study results, it is revealed that the use of the regeneration degree of over 0,9 with low coefficient of pressure losses in recuperators for the development of modern recuperative MGTUs leads to the unit effective efficiency not exceeding 3840% because of certain restrictions of gas temperature at the MGTU turbine inlet caused by difficulties with cooling and ensuring small size and efficiency of the unit.
CONCLUSIONS: Use of new heatproof materials is to become an important part of improvement of MGTU in future, therefore it is necessary to study new technical solution when using prospective materials of recuperators for choosing optimal parameters of the MGTU cycle with regeneration. In addition, the option of using bimetallic recuperators is considered.
The method of efficient individual control of electric traction motors of an electric portal axle during cornering
Authors: Antonyan Akop V.
Published: June 2023

BACKGROUND: In recent years, the global automotive industry has shown increased interest in electric traction drive for road vehicles, including electric cars, electric buses and electric trucks, where various drive layouts are used. One of the most widespread drive layouts is an individual electric traction drive, which is often used in modern electric buses. The individual electric traction drive has such advantages as reliability in sustaining traction or braking forces in case of failure of one of the engines, compact placement of engines, low floor level along the entire length of the cabin and adaptation of the electric traction drive to road conditions. The last point of the mentioned advantages requires the development of an advanced control system.
AIMS: Development of the yaw recognition algorithm and formation of the algorithm for designing a torque redistribution regulator.
METHODS: Modeling of the operation of the yaw recognition algorithm is carried out during simulation tests in the MATLAB/Simulink software package. The main dependencies are derived, followed by obtaining a phase variable, for the correct operation of the optimal controller.
RESULTS: The yaw recognition algorithm, which forms the torque redistribution between the driving wheels, is developed, an algorithm for designing an optimal regulator was developed, such concepts as theoretical and actual motion parameters are introduced. Simulation modeling of the spatial movement of an electric bus is carried out in the MATLAB/Simulink software package, showing the operability and efficiency of the developed system. The scientific novelty is the formation of the optimal regulator, making torque redistribution possible.
CONCLUSIONS: The practical value of the development and research lies in the possibility of applying the algorithm and the control law for vehicles equipped with the individual electric traction drive.
Research of features of oscillating process’ behavior in the nonlinear system of individual traction drive of an electrobus
Authors: Klimov Alexandr V. , Antonyan Akop V.
Published: June 2023

BACKGROUND: When a vehicle is in motion, self-oscillations which properties are dependent on slip rate in a contact patch may occur in the area of tire interaction with ground surface. Oscillations frequency will vary in dependence with value of wheel slip relative to ground surface. Soft self-oscillations are excited by variable set of initial conditions at full slip in traction and driven wheel rolling modes as well as in mixed braking mode with partial slip. Hard mode of self-oscillations occurs at full wheel slip in braking mode. These processes have a negative impact on the processes in electric drive and mechanical drivetrain reducing their efficiency and may cause damage of components. Oscillations in the system are excited by interaction forces of an elastic tire with ground surface featuring vertical oscillations due to elastic behavior of its interaction with road unevenness.
AIMS: Research of features of oscillating process behavior in the nonlinear system of individual traction drive of an electrobus.
METHODS: Simulation of self-oscillation excitation processes in the area of contact interaction of a wheel and road was carried out in the MATLAB/Simulink software package.
RESULTS: The article features the results of simulation and experimental studies of self-oscillation excitation processes of the KAMAZ 6282 electrobus moving on asphalt-concrete surface. It was found that vertical wheel displacement when moving through unevenness lead to oscillating behavior of vertical reaction forces in contact patches and, as a consequence, to oscillating behavior of longitudinal reaction forces, torque and rotation velocity of the shaft of the traction electric motor of the individual drive. It was defined that tire oscillation frequency is 67 Hz that coincides with electric motor shaft rotation oscillation frequency and this value is the same for both experiment and simulation.
CONCLUSIONS: Practical value of the study lies in ability of using the study results at development of self-oscillation processes exclusion algorithms as a part of vehicle control system.
Epileptic seizure detection combining power spectral density and high-frequency oscillations
Authors: Tutuk Rabia , Zengin Reyhan
Published: June 2023

Detection of pre-seizure signs in epileptic signals may help patients to survive the seizure with minimal damage. This study aims to detect epileptic seizure patterns using EEG datasets of five patients. The signals' maximum power spectral density (PSD) and high-frequency oscillations (HFOs) signals are investigated. The PSDs of all patients' signals are calculated, and the subbands of the maximum PSD are examined. It is observed that 95%, 85%, 85%, 75%, and 80% of the channels of the five patients are in the sum of delta and theta subbands of the maximum PSD, respectively. All patients' maximum power frequency subbands of F4 and T3 channels included only delta and theta subbands. Furthermore, frequency increase rates of pre-ictal and ictal signals are investigated, and increasing PSDs of ripples and fast ripples are then calculated. A much higher-frequency ripple follows the low-frequency ripple in 75%, 75%, 65%, 85%, and 75% of the channels of the first, second, third, fourth, and fifth patients, respectively. For the pre-ictal data, a much higher frequency ripple is not seen, followed by a low-frequency ripple in 90%, 85%, 75%, 90%, and 90% of all channels of five patients, respectively. In addition, in this study, the frequency of signals is observed to be 80 Hz and above in the Fp2, C4, P4, O2, and Pz channels, which are common to all patients. Consequently, examining PSD and HFO signals ensures the detection of the differences between the data sets and detects the epileptic seizure patterns in all five patients.
Namoro na escola: estudo realizado entre os(as) alunos(as) adolescentes do Centro Federal de Educação Tecnológico da Paraíba
Authors: Silva Selma Elaine De Andrade , Correia Maria Ivete Martins
Published: June 2023

Este trabalho consiste em investigar as razões que levam os(as) alunos(as) adolescentes a namorarem na escola e a resposta institucional em relação à expressão afetivo-sexual dos discentes dentro da escola. Proporcionar aos(as) jovens, meios de desenvolverem suas próprias capacidades sexuais, ampliando a possibilidade de posicionar-se conscientemente frente a sua sexualidade, de modo a ajudá-los(as) a se tornarem pessoas autônomas, e com limites definidos, com objetivo de assumirem posturas conscientes e responsáveis dentro e fora do espaço institucional.
Hardness and Depth of Cure of Conventional and Bulk-fill Composite Resins in Class II Restorations with Transparent and Metal Matrix Strips
Authors: Musavinasab Seyed Mostafa , Norouzi Zahra
Published: June 2023

Objectives: Hardness is relevant to the degree of conversion (DC) and depth of cure (DoC). The aim of this study was to determine the micro-hardness and DoC of conventional and bulk-fill composite resins in class II restorations using metal and clear matrix bands.
Materials and Methods: Twelve specimens of each of the two composite resins, i.e., Filtek Z350 XT bulk-fill and Gradia posterior conventional composite, were prepared in the form of a class II cavity in a tooth mold, using a clear or metal matrix band. All specimens were cured and stored at 37°C for 24 hours. Vickers hardness was measured as a function of DoC at 2mm intervals. Data were analyzed by two-way ANOVA (alpha=0.05).
Results: The bulk-fill composite exhibited significantly higher hardness levels than the conventional composite in all tested surfaces (P<0.001). However, while the metal matrix band had a significant impact on the bottom surface (P=0.059) and also on the furthest surface from the matrix and light source (P=0.04), it did not have a consistent effect across all tested surfaces. The simultaneous interaction of the composites and matrix band types in all surfaces, did not show significant differences in hardness values. The highest bottom-to-top surface hardness ratio (73%) was observed in the conventional composite near the metal matrix band.
Conclusion: In deep class II cavities, the bottom-to-top surface hardness ratio did not reach the maximum of 80%, neither for bulk-fill nor conventional posterior composites. Therefore, in such cavities extended light-curing and more incremental composite placement is needed.
Epidemiology of nosocomial Staphylococcus epidermidis and Acinetobacter baumannii infections in a neonatal intensive care unit
Authors: Nayeri Fatemeh , Dalili Hosein , Shariat Mamak , Farrokhzad Nahid , Abouhamzeh Kosar , Sahebi Leyla
Published: June 2023

Background and Objectives: This study aimed to investigate epidemiology of Staphylococcus epidermidis (S. epidermidis) and Acinetobacter baumannii (A. baumannii) infections  in neonatal intensive care unit (NICU) in a period of 8 years.
Materials and Methods: This retrospective cohort study was conducted on 46 cases of nosocomial infection by S. epider- midis, and 44 neonates with A. baumannii in NICU of Valiasr hospital, Iran.
Results: The trend of A. baumannii and S. epidermidis infection were as follows: 1 and 7 in 2014, 11 and 7 in 2015, 20 and 11 in 2016, 1 and 4 in 2017, 4 and 6 in 2018, 4 and 4 in 2019, 0 and 1 in 2020, and 3 and 6 in 2021-March 2022 respectively. Mortality proportion (%) in neonates with S. epidermidis and A. baumannii infection was at 8.3 and 32.1, respectively. There was a strong positive correlation between number of infected neonates in month and average of prescribed antibiotics before incidence of infection in every baby in that month. Fluconazole prescription before incidence of infection were associated with the A. baumannii infection in month too. Amikacin prescription had adjusted correlation on increasing of A. baumannii and S. epidermidis infection in month.
Conclusion: It seems reducing of hospitalization duration and medication prescriptions management plays an important role in reducing of nosocomial infections
Detection of plasmid-mediated AmpC β-lactamases in Klebsiella pneumoniae clinical isolates from Bushehr province, Iran
Authors: Faghihi Khatereh , Tajbakhsh Saeed , Fouladvand Moradali , Latifi Behrouz , Yousefi Forough
Published: June 2023

Background and Objectives: Plasmid-mediated AmpC producers are considered an increasing concern. The aim of this study was to investigate the prevalence of plasmid-mediated AmpC β-lactamases (pAmpCs) in Klebsiella pneumoniae iso- lates.
Materials and Methods: A total of 228 clinical isolates of K. pneumoniae were collected in Bushehr province, Iran, from December 2017 to February 2019. Cefoxitin disks were applied for screening AmpC-producing isolates. Furthermore, 3 phe- notypic confirmatory tests including combine disk test (CDT), double disk synergy test (DDST) and modified three dimen- sional test (M3DT) were used. Finally, the presence of pAmpC genes was tested by multiplex PCR.
Results: We identified 18 pAmpC-KP isolates among the 228 isolates (7.9%): 12 DHA (66.6%) and 6 CMY (33.3%). In the present study only 47% of cefoxitin-resistant isolates were pAmpC producers. The sensitivity of CDT, DDST, and M3DT was 89%, 67% and 100% and the specificity was 90%, 90% and 85%, respectively. In addition, M3DT displayed a higher rate of efficiency (92%) than CDT (89%) and DDST (79%) in detecting plasmid-meditated AmpC producers.
Conclusion: DHA was the most prevalent pAmpC beta-lactamase in this study. DDST and CDT tests proved inefficient to detect two and six pAmpC producers, respectively, while M3DT represented the best overall performance.
Molecular epidemiology of antibiotic-resistant Escherichia coli among clinical samples isolated in Azerbaijan, Iran
Authors: Ghotaslou Reza , Baghbani Shabnam , Ghotaslou Pardis , Mirmahdavi Solmaz , Leylabadlo Hamed Ebrahimzadeh
Published: June 2023

Background and Objectives: The immediate emergence of resistant bacteria poses an increasingly growing problem to human society and the increasing prevalence of antibiotic resistance in Escherichia coli strains is one of the most important health problems. This study aimed to review the molecular epidemiology of drug resistance among clinical isolates of E. coli in north-west portion of Iran Azerbaijan.
Materials and Methods: A complete of 219 clinical isolates of E. coli had been collected from the various clinical samples. The disk diffusion and agar dilution assays were used to determine antimicrobial susceptibility. The presence of antibiotics resistance genes was carried out by the PCR method.
Results: The highest susceptibility was shown to imipenem (3%) and fosfomycin (3%), and the most antibiotic resis- tance was presented to ampicillin (99%). The highest frequent ESBL gene among isolates was bla CTXM-15 in 70% followed by bla CMY-2 in 67%, and bla TEM-1 in 46%. The most common fluoroquinolone (FQ) resistance genes were oqxB (34%), fol- lowed by oqxA (25%), and qnrB (18%). The frequency of tetracycline resistance genes (tetA, tetB, tetC, and tetD) were de- tected in 24.8%, 31.6%, 1.8%, and 4.2%, respectively. The highest frequent genes to fosfomycin were fosA 10%, fosA3 30%, fosC 40%, and fosX 20%. The dominant founded aminoglycosides resistant genes were armA (12.96%) and npmA (4.93%).
Conclusion: The prevalence of antibiotics resistance in the tested E. coli isolates was high in Azerbaijan, Iran and these findings showed that E. coli is one of the major drug-resistant pathogens.
Isolation and characterization of the lactobacillus strain from honey and its probiotic properties
Authors: Goli Mehdi Abadi Mohammad Ebrahim , Hosseini-Safa Ahmad , Habibi Sina , Dehghan Mohammadreza , Forouzani-moghaddam Mohamad Javad , Oshaghi Mojgan
Published: June 2023

Background and Objectives: The lactobacilli are abundant in honey, helping protect against pathogens and providing antimicrobial properties. This study aimed to isolate lactobacillus species from different honey regions and evaluate their potential probiotic properties.
Materials and Methods: Eighty-eight samples were collected from different regions, including the northern, central, and southern areas, and obtained through retail stores. All samples were independently examined for the presence of Lactoba- cillus using both culture and real-time PCR methods. Probiotic tests were performed on the isolated Lactobacillus strains, including hemolytic activity, bile, acid, and pepsin resistance. Additionally, the antibiotic resistance of the obtained strains was investigated using seven different antibiotics.
Results: Thirteen Lactobacillus isolates were obtained from 7 (8.0%) honey samples. Of these, eight isolates were identified as L. plantarum (61.54%), four isolates as L. rhamnosus (30.77%), and one isolate as L. acidophilus (7.69%). All strains were devoid of hemolytic activity, and three isolates (23.07%) were found to be resistant to acid, while 2 (15.38%) showed resistance to bile and pepsin. All isolates were resistant to vancomycin (100%). Additionally, only one strain exhibited resis- tance to all tested antibiotics. Furthermore, the present study demonstrates a significant association (p-value<0.05) between the presence of Lactobacillus in various regions of Iran.
Conclusion: Various factors, such as climatic conditions and geographical location, can influence honey's composition and microbial diversity. Identifying and isolating potential probiotic species in honey could significantly expand their use in the food and pharmaceutical industries, offering numerous health benefits and potential therapeutic applications.
Biodegradation of 17 β-estradiol by Serratia marcescens and Stenotrophomonas tumulicola co-culture isolated from a sewage treatment plant in Upper Egypt
Authors: Mahmoud Ali Ibrahim , Mohamed Halby Hamada Mohamed , Anwar Abd-Elrady Bahaa-Eldin , Salim Mohamed Taha , Mohamed Heba Ahmed
Published: June 2023

Background and Objectives: 17 β- estradiol (E2) is an important pollutant of the aquatic system. It is responsible for sexual disruptions in the majority of aquatic organisms. This study aimed to search for bacteria with high potential degradation of E2 as an important method for bioremediation.
Materials and Methods: Sewage water samples were collected and treated to isolate bacterial strains which were identified by conventional methods and 16S ribosomal RNA gene sequence analysis. The biodegradation of E2 by the isolated strains was evaluated under different environmental conditions.
Results: Two bacterial strains were recovered from sewage water samples and identified as Stenotrophomonas tumulicola and Serratia marcescens, (named ASc2 and ASc5 respectively). Co-culture of the two strains showed biodegradation of approximately 93.6 % of E2 (50 mg. L-1) within 48 hours. However, the biodegradation capacity of the same E2 concentra- tion was 69.4% and 71.2% for ASc2 and ASc5 each alone, respectively. The optimum cultivation conditions for efficient E2 biodegradation by co-culture were 5% (v/v) inoculation volume with 50 mg. L-1 of E2 as the initial concentration at pH 7 and 30°C within 48 hours inoculation period.
Conclusion: This study detected new bacterial strains that are capable of rapid degradation of estrogen as an environmental pollutant.
Frequent detection and genotyping of human rhinovirus in SARS-CoV-2 negative patients; a study from south of Iran
Authors: Darabi Amirhossein , Sarshari Behrang , Vahdat Katayoun , Mousavi Seyed Alireza , Keshavarz Mohsen
Published: June 2023

Background and Objectives: Human rhinovirus (HRV), a major cause of common cold, was associated to the hospitaliza- tion of children and adults. This cross-sectional study aimed to determine the prevalence, and genotype distribution of HRV in the patients with mild to severe respiratory infections who were negative for SARS-Cov-2.
Materials and Methods: Nasopharyngeal swab specimens (n = 356) from the patients aged 29 days to 82 years, received for the respiratory virus detection from January to December 2021, were analyzed for human rhinovirus (HRV) by RT- PCR. As a final step, genotyping was performed on obtained sequences.
Results: A total of 37 HRV infections were identified (37/356, 10%). The highest rates of positive HRV tests were observed in February (21.6%), and January (18.9%), compared with June and August (0%). HRV-positive cases mainly appeared in winter. Among the age groups, those 2-<5 years of age had the highest detection rate (21%), however, those >55 years of age had the lowest detection rate (3%). Among HRV-positive samples, 30 (81%) were identified as type HRV-A, 5 (13.5%) as HRV-B, and 2 (5.5%) as HRV-C.
Conclusion: Our results suggested that HRV frequency gradually decreased with the age of patients which is more active in Iran, especially in the cold months.
Improving the physical and mechanical properties new concrete containing crushed dune sand and demolition waste as coarse aggregate
Authors: Agha Noureddine , Makkani Abdelkadir , Tafraoui Ahmed , Zaouai Said
Published: June 2023

Using concrete waste as aggregates in new concrete compositions brings numerous advantages. It helps in reducing the costs associated with managing demolition waste and contributes to the preservation of natural deposits and mountains by minimizing the demand for new quarries. However, when completely substituting natural aggregates (NA) with recycled concrete aggregates (RCA) in concrete, it directly affects the fundamental properties of the material, particularly its physical and mechanical characteristics. This is primarily due to the inferior qualities exhibited by RCAs in comparison to natural coarse aggregates, primarily stemming from their increased porosity and water absorption. In the experimental study conducted, the focus was on investigating the influence of substituting cement with crushed dune sand (CDS) at different replacement levels (5%, 10%, and 15%) on the mechanical and physical properties of self-compacting concrete (SCC) incorporating 100% RCA. The findings from this study indicated that the substitution of cement with CS resulted in improved mechanical and physical behavior of the self-compacting concrete containing 100% RCA, particularly when CS was present at 5% and 10% levels. Overall, the study suggests that incorporating CS as a partial substitute for cement in SCC containing 100% RCA can positively affect the properties of the concrete mixture, enhancing its mechanical and physical performance.
Gelibolu Yarımadası’nda İlk Osmanlıların Fetih Güzergâhı ve Gelibolu’nun Fethi (1354)
Authors: Tetik Metin
Published: June 2023

İlk Osmanlılar için Gelibolu Yarımadası’nın fethi, Rumeli’ye geçiş ve yerleşme sürecinin en önemli basamağını oluşturmaktadır. Erken dönem Osmanlı kroniklerin- de bu süreç, mistik anlatılarla ve birbirleriyle çelişen olay örgüleriyle aktarılmaktadır. Bu durum, konu üzerinde çalışan araştırmacıların çalışmalarına da yansımış olup, bu çalışmalarda sağlıklı bir fetih süreci takip edilememektedir. Özellikle bölgenin fethine giden yolda ele geçirilen “Cinbi” ile birlikte Gelibolu Yarımadası’ndaki birçok kale ve mevkinin yerinin tespit edilememesi veya yanlış tespiti, fetih güzergâhı bağlamında araştırmacıları hatalı yorumlamalara sevk etmektedir. Bu araştırma, ilk Osmanlıların Gelibolu Yarımadası’nı fethi sürecinde nasıl bir güzergâh takip ettiklerini tespit etme- yi amaçlamaktadır. Bu amaç doğrultusunda fetih güzergâhı, kroniklerde yer alan to- ponomik-topografik (yer adları) kanıtların Tahrir Defterleri verileriyle desteklenerek, saha araştırması sonuçları ile karşılaştırılması neticesinde belirlenmeye çalışılmıştır. Öncelikle Rumeli fetihlerinin 1352’de değil de 1-2 Mart 1354 tarihinde gerçekleşen depremin ardından başlamış olabileceği görüşü kuvvetle vurgulanmıştır. Ayrıca başta “Cinbi” olmak üzere yarımadada ele geçirilen kale ve mevkilerin yerleri, bilhassa böl- genin fethindeki rolleri ön plana çıkarılmıştır. Bu noktada kroniklerin aslında karışık bir anlatım sunmadığı hatta birbirini tamamladığı tespit edilmiş, buna dayanarak ilk Osmanlıların Gelibolu Yarımadası’nın iki noktasından çıkartma yaptıkları ve Geli- bolu şehrini kuşatma altına aldıkları anlaşılmıştır.
Gücün Aynası Yahut Taklidi: Prusya Kralı Büyük Friedrich’in Osmanlı İmparatorluğu’na Gönderdiği Mektuplarda Vurguladığı Nüfuz Alanları
Authors: Ercan Hüseyin Onur
Published: June 2023

Erken Modern Çağ uluslararası diplomasisinin pratiklerinden biri, sarayların ka- lem dairesi tarafından üretilen ve bir başka saraya gönderilen nâmelerde hükümranlık gücünün Tanrı’nın lütfuyla kullanıldığına (kutsal hak) işaret etmek ve sahip ve/veya sahiplik iddiasında olunan mülkleri tadat etmektir. Çok sayıda dilde mâkes bulan bu pratik, dayanılan kutsiyetin ve hükümran olunan arazinin farklı olduğu gerek Hıris- tiyan gerekse Müslüman devletlerce XV. yüzyıldan itibaren yaygın bir şekilde kulla- nılmaya başlanmış ve XIX. yüzyıla kadar sürmüştür. XVIII. yüzyılın ikinci yarısında yoğunluk kazanmış olan Osmanlı-Prusya diplomatik ilişkilerinin göstergesi olan dö- nemin belgelerinin yukarıdaki pratiği ne ölçüde yansıttığı, bu makalenin araştırma konusunu oluşturur. Bunun için Prusya Devleti’ni Avrupa’nın büyük güçlerinden biri hâline getiren Büyük Friedrich tarafından 1758-1762 yılları arasında Bâbıâlî’ye gönderilmiş ve söz konusu pratiği tarihî seyrinin bir devamı olarak hâmil Latince beş nâme incelenmektedir. Ayrıca nâmelerde tadat edilen mülkler, tarihî coğrafya sahasında neşredilmiş olan çağdaş Alman kaynaklarından hareketle yüz ölçümü ve nüfus bakımından ele alınarak Osmanlı Devleti’ne ait verilerle mukayese edilmektedir.