bluuebunny/crossref_metadata_2025 huggingface dataset:
Review of the feasibility of a new touch-sensitive digital display enabled by block copolymer materials
Authors: Zhang Pufan
Published: June 2024

Nowadays, electronic devices are widely used, and as an important part of many electronic devices, human-computer interaction displays have a lot of room for development. At present, traditional touch displays typically incorporate materials such as indium tin oxide (ITO) or graphene, which have limitations such as inflexibility, average accuracy and needing external power supplies. This article describes a motion sensor without additional power supply, which is based on one-dimensional photonic crystals of interpenetrating hydrogel network block copolymer (IHN-BCP), composed of photonic crystals alternating between different layers. The article concentrates on the viability of addressing these difficulties. The result shows that Block copolymers are unique polymers consisting of two or more distinct polymer chains, with the potential to exhibit self-assembling behaviour. Due to the special properties of block copolymer, this display could have flexible substrates and detect various contact and non-contact human motions. This device can be applied to interactive screens for cell phone screens, factory equipment, and other electronic products, and can also provide a reference for the future development of flexible screens.
The application of prefabricated BIM technology in the production and demolition stages of the whole building life cycle
Authors: Bai Zhengyang
Published: June 2024

With the development of engineering construction, the concept of building lifecycle management (BLM) is put forward. The building life cycle is a full cycle process starting from material and construction production, including multiple stages of planning and design, construction and transportation, operation and maintenance, as well as demolition and disposal. With the popularity of the concept of sustainable development, recycling instead of completely abandoning has become a trend. This coincides with the concept of the whole life cycle of a building. Prefabricated BIM (Building Information Modeling) is an important branch of BIM. It plays an important role in the construction of the whole life cycle of buildings due to its characteristics such as visualization, information sharing, and appropriate technology composite, especially in the production and demolition stages. Through qualitative analysis of the advantages of BIM technology and case analysis, this paper focuses on the important role played by BIM technology in the production and demolition stages. The application of BIM technology in construction animation simulation, site layout, and site planning is studied to effectively improve work efficiency and ensure construction quality. Besides, corresponding models and optimization of demolition methods are proposed based on different demolition needs. It can be concluded that in the production stage, BIM technology can be used for structural design, visual three-dimensional (3D) design, collaborative design, and optimization design, while in the demolition stage, BIM technology can be used for space management.
Urban sustainability: Analysis on urban scale of Temuco Chile
Authors: García Roberto Moreno , Seguel Laura Inostroza
Published: June 2024

Cities develop in an excessive and disorderly way, losing their original characteristic identity and function. As a response to the deconstruction of the city, sustainable urban design came into being. This study evaluated the performance and sustainability level of Temuco community. The study was conducted in four sectors of the city, which are symbols and representatives of different stages of urban expansion. Through a set of urban design index standards including economic, social and environmental variables, the development of the community and the quality of life of its residents are evaluated. The results show that the Abraham Lincoln community has a better sustainability index, gathering a group that encourages sustenance and the availability of necessities nearby. The study found that new and old neighborhoods have deficiencies in neighborhood sustainability.
Construction and empirical study of green development competitiveness evaluation index system under eco city planning
Authors: Li Yan , Zhu Jianmin
Published: June 2024

Based on green development theory, green industrial system and green competitiveness, this paper puts forward the “green development theory, green industrial system and green competitiveness evaluation”. This paper makes a horizontal comparative analysis of the actual development data of Tianjin, Beijing, Shanghai and Chongqing, and verifies the scientific, standardization, systematisms and rationality of the “green model” evaluation index system. Using the measurement method combining fuzzy analytic hierarchy process and entropy method to determine the index weight of the evaluation system, this paper makes an empirical study on the green development competitiveness of Tianjin from 2011 to 2016, and analyzes the development status and existing problems of Tianjin’s green development competitiveness. Finally, aiming at the problems and weaknesses such as the lack of green social management function and the worrying overall quality of green environment in Tianjin, the paper puts forward countermeasures and suggestions to speed up the planning of green development demonstration area, make efforts to make up for the shortcomings of green environment, optimize the development strategy of industry city integration, build a smart ecological green city, publicize the concept of green development city and encourage the public to participate in green behavior.
The effect of Google Classroom distance education method on student success and satisfaction in anatomy course
Authors: Bolatli Gunes , Erbek Esin , Bolatli Zafer
Published: June 2024

Aim: Google Classroom (GC), an e-learning platform, has received a lot of attention in the educational community. The aim of the study was to investigate the effectiveness of GC on students in learning a difficult-to-understand topic like nervous system.
Materials and Methods: A total of 144 students studying in the Department of Nursing participated in the study. Students were divided into 3 groups: The group receiving classical education (Group 1), the group receiving education with GC (Group 2), and the group receiving supplementary education with GC and classical education (Group 3). Research data were collected through "Structured Student Introduction Form", "Google Classroom Satisfaction Questionnaire" and "Nervous System Anatomy Knowledge Exam".
Results: In the results, students stated that they found the system and the use of GC easy and that they were satisfied with it. When the achievement tests between the groups were analyzed, the post-test achievement level of Group 2 and Group 3 was significantly higher than Group 1 (p<0.005), and the post-test achievement level of Group 3 was significantly higher than Group 2 (p<0.005). At the same time, although students were generally satisfied with GC, they reported that they experienced problems such as difficulty accessing the internet and uploading homework, and distraction.
Conclusion: Since health sciences education is an applied education, its suitability for distance education is controversial. However, the study found that providing distance education as a support to traditional education increased interest in the course, motivation and success.
Influence of Human Resource Management on Work Efficiency of Healthcare Professionals
Authors: Malesic Nada , Hukeljic Behija , Mustafic Lejla , Kurtagic Damir
Published: June 2024

Background: World Health Organization (WHO) defines human resource pl anning in the healthcare industry as "The process of estimating the number of people, knowledge, skills, and attitudes needed to achieve a set of goals".Human resource planning is the most important part of the work of organizational management. Objective: The aim of the study was to point out the importance of timely and optimal planning of human resources and their impact on the work efficiency of healthcare professionals. Methods: This research is a comparative, descriptive-analytical study which used a questionnaire created according to the Likert model. The questionnaire containes statements related to factors affecting work efficiency, work analysis, position systematization, human resource planning, professional selection, work process design, management and manager's style, etc. Results and Discussion: A total of 450 respondents (healthcare professionals, both docotrs and nurses) participated in this research. Participation (inclusion) critaria in the research is employment in healthcare institutions in Canton Sarajevo, of different ages, of both genders. The planning process begins with a quality job analysis and human resource analysis to get an answer to several very important questions. How many people are needed to realize the set goals of the organization? What kind of people are needed: what skills, knowledge, and abilities? How to attract the necessary people (internal, external filling, selection procedure). How to adjust the current employee’s training so that they can adequately respond to all work tasks in the future, more demanding business environment of the health organization? The lack of human resources that have the necessary skills and knowledge, and the burden of inadequate resources (disabled workers), have slowed down the development of many companies. We are experiencing significant negative manifestation on the existing staff through reduced work efficiency and reduced quality of health care provided. Due to the above, it is necessary to timely plan human resources as an integral part of planning, business, and development of the entire organization. The planning of human resources in a health institution is influenced by the following factors: a) institutional factors b) level of health care c) type of health care institutiond) size of health care institution e) infrastructure of the existing institution. Conclusion: Human resource planning is a fundamental management activity from which all other activities arise,and contents of human resource management planes are based.
Treatment Options for Dry Eye Disease at Svjetlost Eye Clinic Sarajevo - a Review
Authors: Biscevic Alma , Pjano Melisa , Petrovic Bobana , Pandurevic Bojana , Odobasic Mirnesa
Published: June 2024

Background: Dry eye disease (DED) is a chronic condition that significantly impacts global health by causing discomfort and vision disturbances. It arises from the loss of tear film homeostasis, driven by inflammation, hyperosmolarity, and ocular surface damage. These elements create a cycle that exacerbates the condition, leading to severe symptoms that can impede daily activities. The Tear Film & Ocular Surface Society Dry Eye Workshop II (TFOS DEWS II) has classified DED into aqueous-deficient dry eye (ADDE) and evaporative dry eye (EDE), with the latter being more common and primarily caused by Meibomian gland dysfunction (MGD). Objective: The aim of this article is to provide a comprehensive overview of the treatment options for dry eye syndrome available at Eye Clinic Svjetlost and their frequency. By exploring the various therapeutic approaches, including medical treatments and advanced procedures such as LipiFlow, it seeks to inform readers about the diverse strategies to manage and alleviate dry eye symptoms. Methods: This review examines treatment strategies for DED, particularly those used at Eye Clinic Svjetlost in Sarajevo, based on a five-year analysis of patient records. Results and Discussion: Key treatments include artificial tears, punctum plugs, cyclosporine, and LipiFlow. Artificial tears, especially lipid-based formulations, are fundamental in managing DED. Punctum plugs offer a non-invasive option to retain natural tears. Cyclosporine, an immunomodulator, reduces inflammation and enhances tear production. LipiFlow, targeting MGD, provides significant and lasting relief.Additionally, lifestyle modifications, environmental adjustments, and nutritional supplements, particularly omega-3 fatty acids, play crucial roles in alleviating symptoms. Conclusion: The effectiveness of these treatments highlights the importance of personalized care tailored to individual patient needs. This comprehensive analysis underscores the need for ongoing research and innovation to improve treatment efficacy and quality of life for DED patients. It serves as a call to action for healthcare professionals and researchers to continue advancing in this field.
Testosterone and Cortisol Hormones Response and Some Functional Variables to Escalated Aerobic Physical Exercise with the Difference of Biological Timing
Authors: Omar Aladdin Ahmed Al-Naqeeb
Published: June 2024

هدفت الدراسة الحالية إلى: الكشف عن تأثير الجهد البدني ذي الشدة المتزايدة على عدد من المتغيرات الوظيفية: التستوستيرون، الكورتيزول، معدل ضربات القلب، وضغط الدم الانقباضي في أوقات الصباح والمساء. وكذلك الكشف عن تأثير اختلاف التوقيت البيولوجي في فترتي الراحة والجهد على عدد من المتغيرات الوظيفية: التستوستيرون، الكورتيزول، معدل ضربات القلب، وضغط الدم الانقباضي. استخدم المنهج الوصفي لملاءمته لطبيعة الدراسة. تكونت العينة من (8) أفراد تم اختيارهم عشوائياً، تتراوح أعمارهم بين (21-23 سنة) ويمارسون النشاط الرياضي. أجريت التجربة النهائية في الفترة من 14/1/2024 إلى 18/1/2024 وشملت إجراء اختبارين على جهاز الجري المتحرك. أخذ الباحث بعين الاعتبار التسلسل الذي أجريت فيه الاختبارات في كل من فترتي الصباح والمساء. لمعالجة البيانات، استخدم الباحث اختبار T لتحديد الفروقات. توصل الباحث إلى: أن الجهد البدني ذو الشدة المتدرجة في ظروف فترتي الصباح والمساء أدى إلى زيادة واضحة من خلال ملاحظة قيمة المتوسط الحسابي والانحراف المعياري للفترتين، في مراحل الراحة ونهاية الجهد البدني، على التوالي، في هرمون التستوستيرون 7.09 (±1.17) -- 8.97 (±1.80) في الصباح، و 5.21 (±1.14) -- 6.16 (±1.86) في المساء، ومعدل ضربات القلب 70.25 (±6.51) -- 187.25 (±4.02) في الصباح، و 69.12 (±4.99) -- 183.00 (±3.11) في المساء، وضغط الدم الانقباضي 10.93 (±0.86) -- 14.31 (±2.06) في الصباح، و 11.06 (±0.86) -- 14.56 (±1.14) في المساء. كما أن الجهد البدني ذو الشدة المتدرجة تحت ظروف فترتي الصباح والمساء تسبب في انخفاض ملحوظ في هرمون الكورتيزول عند الانتقال من مرحلة الراحة حتى نهاية الجهد البدني. بلغ على التوالي 18.01(±1.38) -- 14.09(±3.87) في الصباح، و 5.17(±1.17) -- 3.94(±1.02) في المساء. يؤدي النمط البيولوجي إلى زيادة ملحوظة في تركيز هرموني التستوستيرون والكورتيزول في الدم في الصباح مقارنة بالمساء، من خلال ملاحظة قيمة المتوسطات الحسابية، التي بلغت (الصباح، المساء) (7.09، 5.21) في الراحة، على التوالي، وبعد إتمام الجهد البدني بلغت على التوالي (8.97، 6.16) لهرمون التستوستيرون. أما بالنسبة لهرمون الكورتيزول، فقد بلغ في الراحة على التوالي (18.01، 5.17)، بينما بعد إتمام الجهد البدني بلغ على التوالي (14.09)، 3.94. وهذا ما يحقق احد اهداف التنمية المستدامة للامم المتحدة في العراق (الصحة الجيدة).
Evaluating the Feasibility of a Future Care Planning Program with Older Adults
Authors: Lee Jeong Eun , Kim Dahee , Kahana Eva , Kahana Boaz
Published: June 2024

Despite potential health care needs, many older adults do not make concrete plans about future care in late life. Prior community programs have not addressed this need via Cooperative Extension systems. To address these gaps, we developed and evaluated the pilot study program, Future Care Planning, designed to help older adults plan for their own personal, health, and environmental care. The Plan Ahead program (Plan Ahead) consists of two sessions implemented over two weeks to teach older adults to plan for their future care across multiple domains, including health communication, aging in place, and end-of-life discussion. Iowa State University Human Science Extension and Outreach specialists delivered the program to a sample of 161 community-residing older adults. We evaluated 1) the feasibility of the Plan Ahead program, 2) the acceptability of the program, and 3) participants’ intention to change their future care planning. Participants reported that the program was useful and relatively easy to implement. They also reported being satisfied with the content and willing to attend other relevant programs in the future. Overall, the findings suggest that Plan Ahead is feasible as an educational program to help older adults prepare for future care planning.
ESTUDO DO CONTROLE GLICÊMICO EM INDIVÍDUOS DIABÉTICOS TIPO 2, UMA VARIABILIDADE CLÍNICA DA AVALIÇÃO MULTIDISCIPLINAR E OS BENEFÍCIOS DO TREINAMENTO AQUÁTICO
Authors: Nascimento Danilla Maria do , Silva Danyele Karla de Souza , Silva Gabriel Ferreira da , Ferreira Júlia Roberta da Silva , Ferreira Juliana Renata da Silva , Clemente Maria Gabriela Joana , Aragão Pedro Henrique Alves , Santana Cássia Milena Cavalcanti de
Published: June 2024

O diabetes mellitus é uma das principais causas de deficiência, mobilidade reduzida e mortalidade prematura, especialmente em pacientes com diabetes tipo 2 (DM2). Há em muitos países, e a taxa de mortalidade por doenças cardiovasculares é quatro vezes maior em pacientes com DM2. A Associação Americana de Diabetes (ADA) tem destacado, em suas recomendações recentes, a importância da educação precoce do paciente e de sua família por meio de programas padronizados. Métodos: foram incluídos no estudo 40 indivíduos e submetidos a avaliação do autocuidado que foi realizada através da aplicação do questionário de Atividades de Autocuidado (QDA) com o Diabetes, versão traduzida, adaptada e validada para a cultura brasileira a partie do the Summaryof Diabetes Self CareactivitiesMeasure(SDCA) e um protocolo fisioterapêutico aquático. Indivíduos foram divididos em dois grupos GA e GB. Resultados: a média de idade dos grupos foi de 60 anos, o P < 0,05 quando comparado os grupos, 12% de desistência e 85% de eficiência do protocolo terapêutico no GA, enquanto o grupo GB sem a educação e saúde multidisciplinar de 68%. Conclusão: Assim, a promoção do autocuidado como uma estratégia crucial para a prevenção e controle do diabetes. Obteve sucesso com a união do protocolo fisioterapêutico aquático atingindo O objetivo principal do artigo que avaliar o nível de autocuidado dos indivíduos com diabetes tipo 2, entendendo a importância da conscientização e educação no controle dessa doença grave. promover a segurança e a responsabilidade do paciente para que ele possa manter um estilo de vida saudável e reduzir os riscos associados ao diabetes.
Comparative Study on Flexural Behavior of Reinforced Concrete Beams Cast by Using Hydraulic Cement and Ordinary Portland Cement
Authors:   Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Ngohpok Chanchai , Thumrongvut Jaksada ,   Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Joysoongnern Namchai ,   College of Innovative Skills, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Suksiripattanapong Cherdsak ,   Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Seangatith Sittichai ,   School of Civil Engineering, Institute of Engineering, Suranaree University of Technology
Published: June 2024

This paper is a comparative study of the flexural behavior of reinforced concrete beams cast by using hydraulic cement and ordinary Portland cement for construction applications. The main variables used in this research comprise of type of cement, ultimate compressive strength of concretes, and curing time. Two different types of cement, including hydraulic cement and ordinary Portland cement, were used at three different ultimate compressive strengths of 18 MPa, 25 MPa, and 32 MPa with the curing times of 28 and 90 days. The beams' nominal span-to-depth (L/h) ratio is 8.0. The results showed that the reinforced concrete beams cast by using hydraulic cement and ordinary Portland cement had similar flexural behavior and failure patterns. Both types of the reinforced concrete beams exhibit linear elastic behavior up to approximately 80–90% of their maximum applied load. Then, the behavior of the beams is nonlinear in that the deflection increased rapidly with a slight increase in the applied load until reaching their failure. In addition, based on the experimental results obtained from this study, it was found that the ACI design equations are acceptable for predicting the design strength of the reinforced concrete beams cast by using hydraulic cement and the hydraulic cement can be an equivalent substitute for ordinary Portland cement for the reinforced concrete beams used in this study. Therefore, this application of the hydraulic cement is not only the environmentally friendly practices, but also promoting low-carbon society as well.
Development of Differential Evolution Algorithm for Simple Assembly Line Balancing Problem Type 1
Authors:   Department of Mechanical Engineering, Faculty of Agriculture and Technology, Rajamangala University of Technology Isan Surin Campus, Chantarasamai Krit , Junchuan Visit ,   Department of Mechanical Engineering, Faculty of Agriculture and Technology, Rajamangala University of Technology Isan Surin Campus, Sresracoo Poontana ,   Department of Industrial Management Engineering, Faculty of Industrial Technology, Buriram Rajabhat University
Published: June 2024

The Simple Assembly Line Balancing Problem Type 1 (SALBP-1) is a widely embraced method in the industry for its simplicity in organizing production processes and enhancing efficiency. Consequently, a Differential Evolution Algorithm (DDE) using a backward task sequence was developed in this study to assist in production process management by determining the optimal number of stations. The efficacy of this method was assessed by juxtaposing it with heuristic approaches, including Longest Operation Time (LOT), Most Following Tasks (MFT), Ranked Positional Weight (RPW), Shortest Operation Time (SOT), Fewest Following Tasks (FFT), Ant Colony Optimization (ACO), Differential Evolution (DE), and Immune Genetic Algorithm (IGA). The findings reveal that DDE outperforms LOT, MFT, RPW, SOT, and FFT in discovering superior solutions and consistently matches solutions achieved by ACO, DE, and IGA methods across all problems. Notably, the DDE method exhibits a shorter time frame for solution discovery.
Lab results of COVID-19 patients: Omicron vs delta variants
Authors: Avraham Dana , Herman Amir , Shaham Gal , Shklyar Arkady , Sulim Elina , Oulianski Maria
Published: June 2024

BACKGROUND

The coronavirus disease 2019 (COVID-19) virus has been a world-known pandemic since February 2020. Multiple variances had been established; the most common variants in Israel were omicron and delta.

AIM

To analyze and compare laboratory values in the "omicron" and "delta" variants of the coronavirus by conducting follow-up examinations and laboratory audits on COVID-19 patients admitted to our institution.

METHODS

A retrospective study, two groups, 50 patients in each group. Patients examined positive for COVID-19 were divided into groups according to the common variant at the given time. We reviewed demographic data and laboratory results such as complete blood count and full chemistry, including electrolytes and coagulation parameters.

RESULTS

The mean age was 52%, 66.53 ± 21.7 were female. No significance was found comparing laboratory results in the following disciplines: Blood count, hemoglobin, and lymphocytes (P = 0.41, P = 0.87, P = 0.97). Omicron and delta variants have higher neutrophil counts, though they are not significantly different (P = 0.38). Coagulation tests: Activated paritial thromoplastin test and international normalized ratio (P = 0.72, P = 0.68). We found no significance of abnormality for all electrolytes.

CONCLUSION

The study compares laboratory results of blood tests between two variants of the COVID-19 virus – omicron and delta. We found no significance between the variants. Our results show the need for further research with larger data as well as the need to compare all COVID-19 variants.
Combined prevention and treatment measures are essential to control nosocomial infections during the COVID-19 pandemic
Authors: Liu Jing-Wen , Li Yue-Yue , Wang Ming-Ke , Yang Ji-Shun
Published: June 2024

Severe acute respiratory syndrome coronavirus-2 is a highly contagious positive-sense, single-stranded RNA virus that has rapidly spread worldwide. As of December 17, 2023, 772838745 confirmed cases including 6988679 deaths have been reported globally. This virus primarily spreads through droplets, airborne transmission, and direct contact. Hospitals harbor a substantial number of confirmed coronavirus disease 2019 (COVID-19) patients and asymptomatic carriers, accompanied by high population density and a larger susceptible population. These factors serve as potential triggers for nosocomial infections, posing a threat during the COVID-19 pandemic. Nosocomial infections occur to varying degrees across different countries worldwide, emphasizing the urgent need for a practical approach to prevent and control the intra-hospital spread of COVID-19. This study primarily concentrated on a novel strategy combining preventive measures with treatment for combating COVID-19 nosocomial infections. It suggests preventive methods, such as vaccination, disinfection, and training of heathcare personnel to curb viral infections. Additionally, it explored therapeutic strategies targeting cellular inflammatory factors and certain new medications for COVID-19 patients. These methods hold promise in rapidly and effectively preventing and controlling nosocomial infections during the COVID-19 pandemic and provide a reliable reference for adopting preventive measures in the future pandemic.
Consideration of the Issue of Rent Increase Due to Excessive Management Fees
Authors:   Korean Association of Aggregate Building Law, Kim Youmg Doo
Published: June 2024

Rent includes the cost of leasing, thus management fees are also included in the rent. Of course, the parties can agree that rent represents the net leasing income and separately agree on the management fees.
However, even if the parties have agreed separately on the rent and management fees, the landlord cannot be allowed to evade obligations related to the rent through the management fees.
Therefore, it is not justifiable to increase management fees over rent to avoid reporting monthly rent or to increase management fees instead of rent to bypass the restrictions on rent increase rates, under the pretext that management fees are not considered rent.
To solve this issue, the following measures should be established: When collecting management fees separately from rent, it is necessary to exclude the management fees received by the landlord from the necessary expenses deducted from the rent for the calculation of rental income, or to include the management fees collected beyond the necessary expenses into the rent.
The Residential Lease Protection Act limits the rate of rent increase to 5%, based on the assumption that the rent includes management fees. Therefore, when assessing compliance with the rent increase rate, it is necessary to calculate the increase rate by combining both rent and management fees.
Amendments to the Collective Building Act should be made to mandate the disclosure of management fees not only by the managers but also by the management companies.
Managing condominiums in the United States
Authors:   Korean Association of Aggregate Building Law, Lee Choon-won
Published: June 2024

Like apartment buildings in Korea, condominiums in the United States are not a physical style or type of building, but rather a mode of ownership. In addition to the physical elements of private and common areas, condominiums in the U.S. also have an owner's association as a human element. However, unlike Korea, the human factor is much stronger than the physical factor. This is because the U.S. condominium law focuses on collective management of property. On the other hand, the Korean Collective Buildings Act has emphasized the right of separate ownership of the exclusive use part from the time of its enactment, as it originated from the modification of the sharing theory of the civil law to adjust the sharing relationship between the exercise of ownership of each exclusive use part and the common part or land, and to promote the survival of each unit owner with respect to the sharing relationship. However, collective buildings in Korea are becoming larger and larger, and large apartment complexes with many facilities are becoming more popular, and the proportion of common areas to the total area is increasing. Therefore, even in the Collective Building Act, it is necessary to strengthen the human factor through the community of residents to manage the common areas and control the interests of users of the common areas, such as noise between floors.
Experimental Investigation of a Cavitating Water Flow With the Addition of Drag-
Reducing Agents
Authors: Azadi R. , Nobes D. S.
Published: June 2024

Local reduction of the pressure in a flow field to levels lower than the saturation pressure triggers the production of tiny vaporous bubbles and causes the cavitation phenomenon. Higher pressure reductions significantly increase the cavitation bubbles’ population, which can coalesce and generate large-scale cavitation structures such as cloud cavitation that shed downstream of the flow channel. The chaotic collapse of cavities produces strong shockwaves in regions with a recovered pressure which causes serious erosion on solid surfaces and high levels of noise. Hence, there is a growing interest in cavitation control methods. In this study, drag-reducing polymer additives are utilized as cavitation reducing (CR) agents in a converging-diverging mesoscale nozzle to verify the applicability of these agents in the control of the cavitation process. Analysis of high-speed images of the cavitating flow fields reveals that the viscoelastic flow of a 400 ppm polymer solution reduced the cavitation intensity by nearly 60 % relative to the pure water flow at a similar Reynolds number. Ultra-high-speed imaging of single cavitating bubbles at the inception showed that in a viscoelastic flow, the collapse period of cavities is longer, and their sizes are shrunk at a lower rate relative to their counterparts in the puer water. Particle image velocimetry (PIV) was used to study the near-wall turbulent flow fields at the flow conditions close to the cavitation inception, at different flow locations with non-zero pressure gradients present on the curved surfaces. Preliminary analysis of the results reveals that viscoelasticity alters the near-wall turbulence and distribution of the pressure gradient fluctuations, which might link to the significant reduction of cavitation intensity in polymeric flows.
Experimental Study Of Precessing Instabilities In The Cold Flow Field Of A Sudden Expansion Dump Combustor
Authors: Holemans T. , Yang Z. , Van den Bosch S. , De Greef J. , Vanierschot M.
Published: June 2024

Stereoscopic Particle Image Velocimetry (SPIV) measurements are performed to analyse the cold flow field in a sudden expansion dump combustor geometry, with an expansion ratio of 4.9. The Reynolds number is varied from 5200 till 63300. The time-averaged flow field is found to be axisymmetric and has a jet-like velocity profile near the nozzle with a spreading rate comparable to free round jets. Despite the axisymmetric nature of the mean flow field, it contains unsteady coherent structures, which are analysed using the Spectral Proper Orthogonal Decomposition (SPOD) method. It is found that the instantaneous flow field is asymmetric and it precesses around the central axis of the geometry. The structure of this precession is similar for all Reynolds numbers investigated and the Strouhal number increases with increasing Reynolds number till a value of 26000, after which it reaches a constant value of around 0.003. These precessing structures were previously only reported for swirling sudden expansion flows, where they are extensively studied, but this study shows they also exist in the non-swirling flow case.
Diffusion Properties Of Time-Resolved Trajectories In The Wake Behind A Cylinder
Authors: Khojasteh A. R. , Heitz D.
Published: June 2024

We investigate the computation of the Lagrangian second-order structure-function for describing the multiscale dynamics of turbulence based on measured particle trajectory data. Using time-resolved three-dimensional particle tracking velocimetry (4D-PTV), we statistically quantified turbulent properties of the anisotropic and inhomogeneous flow field behind a cylinder at a Reynolds number of 39 00. Lagrangian statistical analysis has been performed on nearly 12000 trajectories for 4000 time steps.
Measurements Of The Energy Dissipation Rate In Homogeneous Turbulence Using Dense 3D Lagrangian Particle Tracking And FlowFit
Authors: Schröder A. , Schanz D. , Gesemann S. , Huhn F. , Buchwald T. , Garaboa Paz D. , Bodenschatz E.
Published: June 2024

We present measurements of the full velocity gradient tensor and all volumetric dissipation rate elements based on dense fields of fluid particle trajectories in homogeneous turbulence at Re_λ~270 and ~370 in a Kármán flow between two counter-rotating disks with impellers. Applying the Shake-The-Box (STB) Lagrangian Particle Tracking (LPT) algorithm, we are able to instantaneously track up to 80.000 particles in a volume of 40 x 40 x 15 mm³. The mean interparticle distance is lower than 7 Kolmogorov lengths for the Re_λ ~270 case. A data assimilation scheme (FlowFit) with continuity and Navier-Stokes- constraints is used to interpolate the scattered velocity and acceleration data by a continuous 3D B-Spline representation, enabling to recover (locally) the smallest flow scales. In the presentation, we show Lagrangian velocity and acceleration statistics, as well as the Eulerian counterparts on velocity gradients and pressure fields. We compute the energy dissipation rate directly by making use of quadruples of particle trajectories in close proximity (r < 3η) and compare it to indirect approaches using second-order velocity- and velocityacceleration structure functions in the inertial subrange.
Exploration of Instructional Strategies for Teaching Saudi ESL/EFL Students English Pronunciation
Authors: Alotaibi Wafa Jeza
Published: June 2024

Teaching pronunciation empowers learners to interact and communicate confidently, and clear pronunciation is essential for intelligibility. This study aims to explore the instructional strategies for teaching English pronunciation to ESL/EFL students in Saudi Arabia. A descriptive design was adopted. Through random sampling, a total of 128 English language teachers were recruited from a university in Saudi Arabia. The data were analyzed through Mean, frequencies, and percentages. The overall results suggest a positive environment at the institution for teaching pronunciation, as it is not entirely ignored, despite exam pressure and time constraints. The teachers were willing to support the development of this language aspect. The strategies were mostly centered around behavioural methods, which included minimum pair drills, and communicative activities of discussions and dialogues, which were prescribed in the curriculum. Knowledge of articulatory functions and suprasegmental features, which are important for intelligibility, are also covered.
De invloed van de rechter en deskundigen op waarderingen binnen het ondernemingsrecht
Authors: Graumans I.J.C. , Lafarre A.J.F.
Published: June 2024

De invloed van de rechter en deskundigen op waarderingen binnen het ondernemingsrecht.

In dit artikel verkennen de auteurs de waarderingsmethoden binnen het ondernemingsrecht door middel van een uitgebreide jurisprudentieanalyse, met specifieke aandacht voor de rollen van rechters en deskundigen. Het artikel illustreert dat de waardering van aandelen en ondernemingen een subjectief en complex vraagstuk is, waarin ook economische methoden zoals de Discounted Cash Flow (DCF) en multiples worden toegepast. Uit de bevindingen blijkt dat rechters vaak vertrouwen op de expertise van waarderingsdeskundigen, vooral bij de toepassing van ingewikkelde waarderingsmethoden zoals de DCF. Daarnaast geven de resultaten aan dat deskundigen aanzienlijke discretionaire bevoegdheid hebben in het kiezen van waarderingsmethoden. Dit artikel sluit aan bij de observaties van Gulyás en benadrukt het belang van transparantie en grondige motivatie in het waarderingsproces om de objectiviteit te waarborgen en de besluitvorming van rechters te ondersteunen. Verder onderzoek naar de waarderingspraktijk wordt aangemoedigd.
De Estro-beschikking: target (en bestuurders/commissarissen) beware
Authors: Sardjoe M.P.R. , van Gameren J.Y.
Published: June 2024

De Estro-beschikking: target (en bestuurders/commissarissen) beware

Bestuurders en commissarissen van een doelvennootschap moeten zich bij de uitoefening van hun taken richten naar het belang van de vennootschap en (het bevorderen van het bestendige succes van) de daaraan verbonden onderneming. Als de aandeelhouder voornemens is diens aandelen te verkopen, zal het vennootschapsbelang in de regel niet zozeer worden bepaald door de hoogte van de overnamesom, als wel vooral door het bestendige succes van de onderneming ná de overname. Als de koper de koop wil financieren door middel van een leveraged buyout (LBO), kan dat succes in belangrijke mate afhangen van de gevolgen die de LBO heeft voor de doelvennootschap.
MENINGKATKAN KINERJA APARATUR KECAMATAN MELALUI PROGRAM PENILAIAN SINERGITAS KINERJA KECAMATAN (SKK): STUDI DI KECAMATAN BONDOWOSO KABUPATEN BONDOWOSO TAHUN 2023
Authors: Gani Moh. Abdul , Maulana Akbar
Published: June 2024

Penelitian ini bertujuan untuk menganalisis sinergitas kinerja kecamatan dalam meningkatkan kinerja aparatur di Kecamatan Bondowoso, Jawa Timur. Subjek penelitian dipilih berdasarkan relevansi wilayah, dengan Kecamatan Bondowoso menjadi fokus utama. Metode yang digunakan adalah penelitian kualitatif dengan analisis deskriptif, yang memungkinkan pemahaman menyeluruh terhadap fenomena yang terjadi di lapangan. Dalam penelitian ini, data dikumpulkan melalui wawancara, observasi, dan analisis dokumen. Teori yang digunakan meliputi Manajemen Sumber Daya Manusia (MSDM), Budaya Organisasi, dan Kinerja Aparatur Sipil Negara (ASN). Manajemen Sumber Daya Manusia diterapkan untuk meningkatkan kualitas ASN melalui pengembangan kompetensi dan manajemen kinerja. Budaya Organisasi menjadi faktor penting dalam membentuk motivasi dan perilaku pegawai, sementara kinerja ASN diukur melalui capaian tujuan organisasi serta kualitas pelayanan publik yang diberikan. Hasil penelitian menunjukkan bahwa Kecamatan Bondowoso telah mengalami periode sinergitas kinerja yang positif, dengan berbagai inisiatif pembangunan dan pelayanan publik yang terkoordinasi baik. Kerja sama antarlembaga pemerintah, sektor swasta, dan masyarakat sipil menjadi kunci utama dalam meningkatkan kualitas hidup warga. Dalam konteks pelayanan publik, sinergitas ini memungkinkan terwujudnya layanan yang lebih efisien dan responsif terhadap kebutuhan masyarakat. Dengan demikian, penelitian ini menyimpulkan bahwa sinergitas kinerja kecamatan berperan penting dalam meningkatkan kualitas pelayanan publik di Kecamatan Bondowoso. Kerja sama lintas sektor dan partisipasi aktif masyarakat menjadi faktor utama dalam mencapai tujuan pembangunan dan kesejahteraan bersama.
Mechanism-based antioxidant activity of Rubiaceae species collected from Ilocos Norte, Philippines
Authors: ESGUERRA John D.J. , BERNARDO Julia M.M. , GIMAO Kiara M.S. , PERALTA Marinell E.T. , TIU Christopher J.A. , HERNANDEZ Gerald G.A. , ALEJANDRO Grecebio J.D. , TAN Mario A.
Published: June 2024

The Rubiaceae family, comprising 550 species in the Philippines, is a significant source of bioactive components with ethnopharmacological uses. This study assessed the total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity of six Rubiaceae species, collected in Ilocos Norte, Philippines: Guettardella microphylla (Bartl. ex DC.) Merr., Timonius ternifolius (Bartl. ex DC.) Fern.-Vill., Kanapia monstrosa (A. Rich.) Arriola & Alejandro, Pyrostria triflora Arriola, Calaramo & Alejandro, Pyrostria subsessilifolia (Merr.) Arriola & Alejandro, and Psychotria luzoniensis (Cham. & Schltdl.) Fern.-Vill. Identification of the plant species was done using morphological characterization. The TFC results ranged between 1.86-3.81 mg quercetin equivalent/g dry weight (GAE/g DW), while TPC indicated 5.47-17.17 mg gallic acid equivalent/g dry weight (QE/g DW). G. microphylla showed the highest TFC (3.81±0.20 mg QE/g DW) while P. triflora exhibited the highest TPC (17.17±0.83 mg GAE/g DW). Antioxidant profiling showed P. luzoniensis exhibiting the highest activity in the NOS, ABTS, DPPH, and FRAP assays. G. microphylla showed the highest hydrogen peroxide scavenging activity, while T. ternifolius demonstrated the highest hydroxyl radical scavenging activity. Findings suggest that the crude methanolic extracts of the Rubiaceae species have relatively high TPC and TFC values and exhibit promising antioxidant capacities.
Rapid GC-MS based metabolic profiling of Capsicum annuum L. seeds at different phases of germination
Authors: SARKAR Anup Kumar , ORAON Satyajit , GHOSH Subir , BALL Kakan , SADHUKHAN Sanjoy
Published: June 2024

Seed germination is the most critical stage of the life cycle of a plant. Metabolic regulation is significant during the course of seed germination for the establishment of seedlings. Upon imbibition, the dry and fully developed seeds undergo the release of various organic molecules, such as low molecular weight carbonyl compounds in the form of gases and volatiles, as well as water-soluble organic components like enzymes and polysaccharides. Volatile organic compounds may impart both positive and negative influences on seed germination. A metabolite profiling approach based on gas chromatography−mass spectrometry (GC-MS) was used to investigate time-dependent metabolic changes during the germination of Capsicum annuum L. cv. ‘Bullet’. This study aimed to identify bioactive compounds from the methanolic extract of dry, imbibed, germinating seeds and young seedlings of the ‘Bullet’ cultivar of C. annuum L. by GC-MS. A total of 56 distinct categories of compounds were identified in dry seeds, while fully absorbed seeds contained 53 compounds. In the germinating seed, 52 compounds were identified. With regard to immature seedlings, a total of 28 compounds were identified. The analysis revealed that each stage has a unique bio-constituent; only five compounds were detected in all extracts.
Efeitos isolados e combinados de diferentes estratégias de recuperação pós-exercício em atletas de crossfit®
Authors: Martins Paulo Henrique Gusmão Nogueira , Machado Caroline dos Santos Monteiro , Lino Matheus Marinho Aguiar , Dias Luana Barbosa , Oliveira Marcelo Ferreira Duarte de , Aleixo Júnior Ivo de Oliveira , Casalechi Heliodora Leão , Leal Junior Ernesto Cesar Pinto
Published: June 2024

Introdução: O CrossFit® é uma modalidade de exercícios de alta intensidade cuja parte mais intensa do treinamento e campeonato é chamada de WOD (workout of the day). As competições são realizadas com vários WODs em sequência e em dias seguidos, o que pode causar fadiga muscular e aumento da propensão do atleta às lesões. Em alguns esportes, a fim de minimizar tais consequências, dispositivos terapêuticos têm sido utilizados para acelerar a recuperação muscular ou modular os prejuízos causados após o exercício extenuante, entretanto, não se sabe qual o melhor recurso para promoção da recuperação muscular mais rápida e eficiente em atletas de CrossFit®.Objetivo: Diante disso, o objetivo desse estudo é comparar os efeitos isolados e combinados entre três diferentes recursos terapêuticos: TFBM-CMe, TOC e CPI na recuperação muscular em atletas de CrossFit®.Metodologia: Será conduzidos um ensaio clínico randomizado, controlado, cruzado e cego. Com participação voluntária de homens atletas de CrossFit® de 18 a 36 anos, que serão aleatoriamente distribuídos de acordo com a ordem cruzada dos tipos de tratamento (controle/recuperação passiva, TFBM-CMe, TOC e CPI) a serem recebidos nas 4 semanas de procedimento. A recuperação muscular será avaliada antes de qualquer intervenção (basal) e 1h, 24h e 48h após a realização do WOD para indução à fadiga. As avaliações serão compostas pelo teste funcional, o Countermovement Jump Test (CMJ); percepção subjetiva de esforço/fadiga mensurado pela escala CR-100 e variáveis fisiológicas por meio da análise do estresse oxidativo. Os dados serão analisados estatisticamente e o considerado nível de significância será de p<0,05.Discussão: Através dos resultados da avaliação funcional e bioquímica do estudo comparativo, esperamos esclarecer qual o melhor recurso para ajudar no desempenho e retardo da fadiga muscular, consequentemente diminuindo o risco de lesão.
Pengaruh kualitas aparatur daerah, dan sistem informasi terhadap manajemen aset di Kabupaten Oku selatan
Authors: Septriyani Septriyani
Published: June 2024

Penelitian ini bertujuan untuk mengetahui pengaruh kualitas aparatur daerah, dan sistem informasi terhadap Manajemen Aset di pemerintahan kabupaten oku selatan provinsi sumatera selatan. Populasi dalam penelitian ini adalah pengguna barang, pengurus barang pengguna dan pembantu pengurus barang pengguna yang ada pada masing-masing organisasi perangkat daerah. Data yang digunakan dalam penelitian ini adalah data primer yang di peroleh dari penyebaran kuisioner kepada responden. Penelitian ini menggunakan model analisis regresi linier berganda dengan bantuan software SPSS. Hasil penelitian menunjukan bahwa : (1) Kualitas Aparatur Daerah, dan Sistem Informasi secara parsial berpengaruh positif dan signifikan terhadap Manajemen Aset dan (2) Kualitas Aparatur Daerah, dan Sistem Informasi secara simultan berpengaruh positif dan signifikan terhadap Manajemen Aset.
Pengaruh kualitas pelayanan, lokasi dan persepsi harga terhadap kepuasan pelanggan di Hotel the Grove Suites
Authors: Putri Aliffa Sara , Reza Ruliarto Heidi
Published: June 2024

Penelitian ini bertujuan guna menganalisis pengaruh kualitas pelayanan, lokasi, serta biaya yang dirasakan pada kepuasan pelanggan di The Grove Suites Hotel. Partisipan penelitian ini adalah pengunjung The Grove Suites Hotel pada bulan Juni 2022. Purposive sampling digunakan untuk mengambil seratus tanggapan. Responden yang pernah berkunjung dan menginap di The Grove Suites Hotel minimal dua kali merupakan kriteria pengambilan sampel yang disengaja. Pengumpulan data menggunakan kuesioner menggunakan skala Likert dengan 5 (lima) kemungkinan jawaban. Pendekatan analitik ini melibatkan regresi berganda dengan memakai SPSS 25. Teknik penilaian data menggunakan uji asumsi konvensional (Uji Normalitas, Heteroskedastisitas, Multikolinearitas, dan Linieritas). Model ditentukan dengan pengujian hipotesis memakai uji F, uji T, uji korelasi, dan koefisien determinasi (R2). Hasil penelitian memperlihatkan bahwasanya variable kualitas pelayanan secara parsial berpengaruh signifikan pada kepuasan pelanggan dan memberikan kontribusi sebesar 5,9 persen, variable lokasi berpengaruh signifikan pada kepuasan pelanggan dan memberikan kontribusi sebesar 4,4 persen, dan variable persepsi harga berpengaruh signifikan pada kepuasan dan kontribusi pelanggan. 14 persen; dengan demikian, kesimpulan dari variable kualitas layanan produk, lokasi, serta persepsi harga semuanya mempengaruhi kepuasan pelanggan secara simultan di Hotel The Grove Suites.