bluuebunny/crossref_metadata_2025 huggingface dataset:
Bakti Sosial Pengabdian Masyarakat melalui Sunat Massal Gratis di Klinik Swara Medika Medan Sumatera Utara
Authors: Rahman Aceh Arif , Munir Chairul , Matondang Elsa Rizky Safitri , Purba Jesmo Aldoran
Published: July 2023

Circumcision is one of the teachings of Prophet Ibrahim AS which is an obligation for men. Klink Swara Medika Circumcision Volunteer Team partnering with DPD PPNI Medan City to provide free mass circumcision assistance for children in this community service social service event during the school holidays in accordance with the health protocol. The purpose of this mass circumcision social service activity is to mass circumcise Muslim children who are about to reach puberty in the Medan environment, especially children who are economically disadvantaged. The method used in this activity is to disseminate information on community service activities through direct visits to the Swara Medika Clinic in Medan City, social media. The result of this community service activity was that mass circumcision was carried out on July 2, 2023 at the Swara Medika Clinic in Medan City. Participants in the mass circumcision were 20 people from various sub-districts of Medan City. There were 8 medical personnel involved and 8 medical assistant assistants from the Regional Representative Council of the Indonesian National Nurses Association in Medan City.
Pelatihan Pengenalan Dasar Linux Ubuntu 22.04 LTS di Pusat Pendidikan Manajemen Bisnis “Mitra Kreatif Computer” Kisaran
Authors: Siagiaan Edward Robinson
Published: July 2023

Community Service activities are carried out at the Business Management Education Centre "Mitra Kreatif Computer" Kisaran in the form of training on the introduction of an operating system application for junior and senior high school students in the Kisaran area. This institution is located at Jl. Cokroaminoto No. 115 B Kisaran. There are many people who do not have the right job or business, so it is difficult to get a job at this time, this is a big problem faced by prospective workers who have just completed high school level studies in improving the economy, especially in the situation facing the economic recession in 2023. Previously the Business Management Education Centre "Mitra Kreatif Computer" Kisaran provided learning and training materials to the community with a variety of skills. Such as graphic design training, computer engineering and others. The training that will be carried out is training in the introduction of an operating system application for junior and senior high school students in the Kisaran area. With this training course, it can help the community to get a job or open business opportunities. Evaluation of learning outcomes is carried out directly after the training is completed, by giving exam questions or quizzes by setting the time tempo. The questions/quizzes are in the form of design examples and will be done by each participant then saved and displayed on the projector, then the instructor scores and submits the score to the admin of the Business Management Education Centre "Mitra Kreatif Computer" Kisaran to print the certificate and give it to the trainee.
Pemanfaatan Dan Pelatihan Penggunaan Marketplace Shopee Sebagai Sarana Pemasaran Pada Toko Maysara Hijab
Authors: Hamdani Rita , Fadillah Rezky Syarifah , Suherdi Devri , Sari Kartika , Syahputri Astri
Published: July 2023

The Maysara Hijab shop is one of the businesses located in Binjai City, precisely on Jl. Tuanku Imam Bonjol. The Maysara Hijab shop does not only sell hijabs, but also clothes for women. In the sales process, the owner of the Maysara Hijab shop only sells offline, namely waiting for customers to come to the store. So there is no container used to promote online. This is because the owner does not know how to carry out promotions and create a marketplace for promotional containers in selling their products. With these problems, we, as the PKM team, assisted in creating a marketplace at Shopee and assisted in promotion on social media. This partnership activity starts with registering to create an account for shop owners at Shopee, then creating a shop and entering product data and registering a free shipping shop. When the Maysara Hijab Shop was finished, the PKM Team assisted in training on using the Shopee Marketplace from entering new products, accepting orders and shipping products and disbursing funds from product sales. As a result of this PKM activity, it is hoped that the owner can independently manage his marketplace and be able to use the marketplace
Narrative Study on Successful Career Transition Based on Experiences of Chinese Vocational College Maritime Students
Authors: Wang Li , Miao Congjin , Feng Liying
Published: July 2023

Chinese vocational college maritime graduates play a crucial role in the maritime field. They operate ship equipment, ensure maritime safety, and provide important support in achieving the goal of China becoming a maritime power. Therefore, paying attention to their career development is of significant importance. This study adopted a narrative research approach and aimed to delve into the inner journey of successful career transition among 12 Chinese vocational college maritime graduates. It was conducted through semi structured interviews to gain a comprehensive understanding of their experiences. The research findings indicate the interviewees identified several challenging factors associated with the maritime profession. These factors include monotonous and oppressive job tasks, high work pressure, confined spaces on ships, fixed and inflexible salaries, limited career advancement opportunities, a sense of disconnection from society, difficulties making friends, challenges achieving work–life balance, and limited prospects for career growth. These factors contributed to a subjective sense of professional dissatisfaction among them. However, once they transitioned to land-based jobs, they achieved subjective professional success. This can mainly be attributed to the fact that land-based jobs allow them to take care of their families, pursue a more independent lifestyle, maintain social connections, and lead a stable life. Based on the research findings, it is recommended ship companies and society as a whole pay attention to the career development of maritime students and improve the working environment in the maritime industry. This is necessary to meet their needs for balancing family responsibilities, pursuing a more independent lifestyle, and maintaining social connections. By addressing these aspects, it will help facilitate subjective professional success among maritime students.
Երկնային լուսատուների արտացոլումն ուրարտական մշակույթում՝ մի քանի իրերի օրինակով
Authors: Կիրակոսյան Մարինե
Published: August 2023

Artefacts with images of heavenly luminaries are numerous. The
Urartians decorated their seals, jewelry, furniture and many other things
with the above-mentioned images. In iconography, heavenly bodies are
generally expressed in a religious context. Together with the heavenly
luminaries, mainly deities, companion animals were depicted: lion, horse,
ram, bull, goat, antelope, as well as trees of life. All this expresses the
mystery of strength, fertility, awakening, and also emphasizes the
significant role of heavenly luminaries in the beliefs and ideas of the
inhabitants of the Kingdom of Van.
Impact of Brand Capital on the Stock Price Crash Risk, an Empirical Study
Authors: Alsomaidaee Mustafa , Al Janabi Ahmed A Mahmood , Neamah Rusul
Published: July 2023

The factors influencing the financial market are rapidly becoming more complex. The impact of non-financial factors on the performance of a company’s common stock can increase in ways that were not previously expected. This study investigated how brand capital affects the risk of stock prices in Iraqi private banks listed on the Iraq Stock Exchange failing by identifying the likelihood of a crash caused by a negative deviation in the distribution of returns on ordinary shares. As a result, the current study’s concept is to review an analytical knowledge framework of the nature of that relationship, its changes, and its impact on the pricing of ordinary shares of the banks of the researched sector for the years 2009 to 2017, as well as by the 21 banks listed during that time and by the 588 observations using the expanded market model to determine quarterly changes in stock prices. In addition to testing the negative coefficient of skewness and the down-to-up volatility models to test the contribution of brand capital in reducing the risk of stock collapse, The test results showed that brand capital is closely related to the significant and adverse risks of a stock crash. Additionally, the first’s impact is inverse, as its content highlights the role that the research sample banks’ brand capital played in lowering the dangers of stock price crashes.
Impact of Integrating Information Technology in Teaching English in College of Education: A Systematic Review
Authors: Asare Samuel , Amidu Alhassan , Aning Eric , Ampomah Thomas , Bediako Yaa Asantewaa , Amuaful Emelia , Baah Kwasi Bamfo
Published: July 2023

This systematic review investigates the influence of incorporating information technology (IT) in teaching English in higher education settings. With the rapid growth of technology, its integration in education has garnered considerable attention, and this study aims to offer a complete overview of the consequences of IT integration in the context of English language training. The review takes a systematic approach, identifying, selecting, and analysing relevant scientific articles published between 2010 and 2021. The findings highlight many significant areas where IT integration has considerably impacted English teaching in college settings. These areas include improved language acquisition, higher student engagement and motivation, increased access to learning resources, and the development of digital literacy skills. Furthermore, the assessment cites various problems connected with IT integration, such as technical issues, teacher training requirements, and potential technological access disparities. The findings emphasise the importance of careful preparation, pedagogical considerations, and ongoing assistance to effectively integrate IT in teaching English in college settings. This systematic review adds to the existing literature by synthesising and evaluating current knowledge on the subject, providing valuable insights for educators, policymakers, and researchers interested in leveraging information technology to improve English language instruction in higher education institutions.
Personality disorders (antisocial, borderline, and narcissistic) among parents and their relationship to behavioral disorders among basic education students
Authors: Omed sidiq Rejin , Ali mirza jaff Rashid
Published: July 2023

The current study aimed to examine the prevalence of certain personality disorders، including antisocial، borderline and narcissistic among parents of basic education students. Similarly، it aimed to examine the prevalence of conduct disorder among basic education students، and the differences in the prevalence of these disorders according to gender. The current study also aimed to investigate the contribution of parents’ personality disorders in the variance of children’s conduct disorder. The researchers prepared three measures to examine parent’s personality disorders. A questionnaire by Abdullah (2019)، which was according to DSM-5، was utilized to assess conduct disorder. Regarding the study sample، the data was collected throughout a multi-stages random sampling method. One thousand eight hundred parents (900 fathers and 900 mothers) of third، fourth and fifth grade children in Sulaymanyeah basic education schools participated in the current study. Along with the parents، sixty teachers also filled out the conduct disorder questionnaire. The results indicated that the prevalence of antisocial personality disorder was %1 for both parents، and the prevalence of borderline personality disorder among mother was %2 and was %3 for father respectively. The narcissistic personality reached %5 according to the mothers’ questionnaire and was %4 according to the fathers’ questionnaire. Concerning the prevalence of children’s conduct disorder، based on the parents report، it was found that %08 children suffer from this disorder ، and %07 based on the teacher reports. The findings also showed no statistically significant difference in the prevalence of parent’s antisocial personality disorder. However، a significant difference was noticed in borderline personality disorder in favor of the fathers. In addition، the prevalence of narcissistic personality disorder was found to be higher among mother compared to fathers. Gender difference was also found in conduct disorder، suggesting that males manifested higher level of conduct disorder than females. Finally، the result of the study indicated a positive correlation between parents’ antisocial personality disorder and children’s conduct disorder.
Revisiting Triangle of Trade-Growth and Pollution for Middle-Income Transitions
Authors: Hassan Syeda Anam , Haq Inayatul
Published: July 2023

The focus of this analysis is to explore the empirical association of environmental degradation as a consequence of energy, economic growth, and trade along with the population in perspective for carbon dioxide pollution emissions. Firstly, the panel unit root and Cross-sectional Augmented Dickey-Fuller (CADF) tests show mixed integration for the 27 middle-income nations during 1990-2020. The Pedroni and Kao panel cointegration tests confirm the long-run association. The estimated econometric results by panel GMM, Panel ARDL, and Dynamic Fixed Effect (DFE) shows a positive association of population density, GDP, energy demand (use/consumption) and openness of trade to environment degrading indicator (i-e CO2 emissions). The econometric results infer that middle-income nations are in the developing stages that require increasing economic activities and export earnings, which in turn uses carbon-intensive fuel industries that compromise environmental quality. Moreover, the Pairwise Dumitrescu Hurlin Panel Causality test exhibits that CO2 pollution emissions are granger caused by energy demand, population density, and GDP, while uni-directional relation is running from energy demand to GDP and CO2 emissions to trade openness. This study suggests the global policy framework cleaner technologies, renewable energy resources, and implementation of environmental taxes e.g. Green taxes and subsidies to environmental goods that are required at top priority to limit environmental degradation.
The impact of Intellectual Capital in Information Centers on the Sustainable Development Goals
Authors:   Department of Research, Prince Mohammad Bin Fahd University, Al-Khobar, Saudi Arabia, Mohamed Mohamed Abdulla
Published: July 2023

This study aims to discuss and analyze the impact of available intellectual capital in the information centers on Sustainable Development Goals (SDGs). And to examine the implementations of Decisions based on intellectual capital and their impact on sustainability. The study also reviews and analyzes the components of the capital intellectual, and the challenges for information centers in developing countries to make available accurate information, data, and intellectual capital. The researcher analyzes and evaluating the current investment in available intellectual capital in information Centers to reduce the knowledge gap with developed countries. The present study has gained significant insights by addressing a dynamic topic that helps developing countries benefit from the power of information centers by enhancing their position, role, and value in achieving SDGs. The researcher found that the information centers containing knowledge, skills, and innovations derived from the human mind are significant to connect all the potential to promote intellectual capital to decision-making centers, which in turn supports SDGs.
Cultural transformation and its impact on social change Saudi Arabia 2022
Authors:   Department of Sociology, Prince Mohammad bin Fahd University, Al-Khobar, Saudi Arabia, Khalife Mirna
Published: July 2023

In the context of the cultural transformation that the Kingdom of Saudi Arabia has witnessed and is witnessing after the launch of Vision 2030, numerous social phenomena have surfaced, some of which have contributed to bringing about a wide change in both thinking and behaviour. It was necessary to probe the impact of the change, as the Ministry of Culture contributes to playing a major role in this planned and methodological change in confluence with the shifts in thinking and practice. The conception of QOL, and the role of cultural transformation in perfecting different aspects of life were stressed, grounded on the constants of Vision 2030 and the related action plans, while the cultural aspects were concentrated on the Ministry performances and how citizens and residents shared in them, as well as by experience and analysis of periodic statistical and graphic reports issued. The Kingdom has witnessed a transformation in the cultural system in the last five years (2018–2022), the effects of which extend to the present, and future, and the aspects of modern cultural transformation in the Kingdom vary from heritage to literature, art, theatre, architecture, media, and so on. In addition to the high rates of participation in diverse activities, which contribute to a structural change in thinking and behaviour that is reflected in the economic, social, and cultural structures, all of the above contribute to raising the quality-of-life index. الملخص في سياق التحول الثقافي الذي شهدته وتشهده المملكة العربية السعودية في السنوات التي تلت إطلاق رؤية 2030م، تبدت ظواهر اجتماعية أسهمت في بعض منها بإحداث تغير واسع على مستوى التفكير، والفعل. ومن خلال القيام بالملاحظة المباشرة بالمعايشة، والنظر في تحليل البنى السوسيولوجية الآخذة بالتحول، وتحليل المسوحات لواقع الثقافة في المملكة، كان لا بد من تحري أثر التغيير، حيث تسهم وزارة الثقافة بلعب الدور الأساس في هذا التغيير المخطط والممنهج، بالتلازم مع التحولات في الفكر والممارسة. ومن أجل دراسة هذا التحول، والبحث في آثاره، كان لا بد من تحليل الأدبيات المنشورة، وقد انصب البحث على إحصاءات صادرة عن وزارة الثقافة المستحدثة عام 2018م، والتي رصدت مختلف الأنشطة المرتبطة بمؤسسات، وجمعيات، ومعاهد، إضافة إلى استصدار قوانين شرعت لتأسيس سلسلة من الهيئات الثقافية، وقد تميّز هذا الحراك بدعمه الحكومي الواسع النطاق. وتم تسليط الضوء على مفهوم جودة الحياة، ودور التحول الثقافي في تجويد مختلف أوجه الحياة منطلقين من ثوابت رؤية 2030، وأطر تنفيذ خططها، وسعى البحث لإثبات تأثير التحول الثقافي في كل المجالات، والبحث في الأوجه الثقافية التي تم التركيز عليها عبر الوزارة ، فضلاً عن الملاحظة بالمعايشة وتحليل تقارير سنوية إحصائية وبيانية. إن المملكة تشهد تحولاً في المنظومة الثقافية في الخمس سنوات الأخيرة 2022-2018م، تمتد آثارها حتى اليوم، وتتنوع أوجه التحول الثقافي الحديث في المملكة من إرث، إلى أدب، فن، مسرح، عمارة، إعلام وما إلى ذلك، فضلا عن ارتفاع نسب المشاركة في الفعاليات والأنشطة المصاحبة، ما يسهم في إحداث تغير بنيوي في الفكر والسلوك يتجلى في مختلف البنى ويسهم كل ما سبق في رفع مؤشر جودة الحياة أحد أبرز أهداف رؤية 2030.
The Emergence of Dr (Mrs.) Ngozi Okonjo-Iweala as The World Economic Elite of The 21st Century
Authors:   Department of Political Science, University of Ibadan, Salawu Ibrahim Ajisola
Published: July 2023

Behind every facets of life; political, economic, religion, social etc., there exists the minority ''elite" that dictates who gets what, when and how. Thus, the idea that the minority makes the decisions that affect the general public remains inviolable and sacrosanct and as such basis for understanding political analysis. It is on this premise that this research paper tends to beam the searchlight on the reality of elite theory of politics and the political process of recruiting elite called circulation of elite in the society with a particular reference to the emergency of Dr (Mrs.) Ngozi Okonjo-Iweala; the 1st female and African Director-General of the World Trade Organisation (WTO) and the world economic elite of the 21st Century.
Study on the Capacity Assessment and Optimization Path of Social Organizations in Assisting Rural Revitalization
Authors: 玉璞 李 , Wang Yu
Published: July 2023

Participation in rural revitalization is a crucial responsibility for social organizations. It not only demonstrates their commitment to serving the country, society, the public, and the industry but is also a vital avenue for achieving high-quality development. To assess the ability of social organizations to contribute to rural revitalization, we constructed an evaluation index system. We employed the TOPSIS evaluation and barrier degree model to evaluate the ability of Chinese social organizations, private non-enterprises, and foundations to participate in rural revitalization in our research area. Our results indicate that the overall ability of social organizations to participate in rural revitalization is at a medium-low level, and three major obstacles exist in the areas of organizational construction, basic guarantee, and project participation. Therefore, we should focus on improving the organizational construction capacity by strengthening the "internal strength of the organization" and cultivate the basic guarantee capacity by paying attention to "own finance." We should also enhance the participation capacity of rural revitalization projects by setting "participation targets" and relying on the "internal strength of the organization." We propose optimization paths from various perspectives, including practicing "internal strength of the organization" and actively improving the capacity of organization construction, paying attention to "own finance" and continuously cultivating the capacity of basic guarantee, focusing on "participation targets" and effectively strengthening the capacity of participation in rural revitalization projects, relying on "digital empowerment" and enhancing the professional service capacity of social organizations, integrating "rural demands" and improving the policy coordination capacity of social organizations.
On Foreignization’s Contribution to Spreading Chinese Language and Culture in Pearl S. Buck’s All Men Are Brothers
Authors: Wu Shaoming
Published: July 2023

Nowadays, “Spreading China’s voice and telling Chinese stories” is a trend and the translation involving Chinese cultural publicity becomes a focus of domestic translation work. The use of foreignization strategy is conducive to the export of source language and culture. With the cultural turn of translation, especially in translation involving cultural factors, foreignization plays an increasingly important role in translation. As one of the four classics, Shui Hu Zhuan is publicly regarded as a masterpiece with great achievement both in the Chinese “good fellow” culture and typical Chinese language features. Amid translation versions of this book, Pearl S. Buck’s All Men Are Brothers is highly praised for spreading Chinese language and culture with foreignization strategy. Typical cases are chosen from Shui Hu Zhuan and its translation All Men Are Brothers to research foreignization strategy’s contribution to spreading Chinese language and culture abroad.
Analysis of the in-cylinder flow of a DISI engine using high-speed particle image velocimetry
Authors: Knöll J. , Mäteling E. , Braun M. , Klaas M. , Schröder W.
Published: July 2023

In addition to exploring electric drives, it is crucial to minimize emissions and improve the efficiency of transport based on internal combustion engines (ICE). For these, in particular, a significant reduction of emissions as well as a considerable efficiency of ICE are required. A reliable formation of an effective mixture prior to ignition and a fast, steady combustion process are two key elements that influence emissions and efficiency. While on the one hand, the air-fuel mixture is formed by strongly three-dimensional, time-dependent flow phenomena during the intake and compression stroke, the turbulence level of the flow near the approaching flame front has a direct impact on turbulent flame propagation. The flow field in the combustion chamber, on the other hand, is highly turbulent and sensitive to cycle-to-cycle variations (CCV). In order to understand the fundamental processes and interactions of the flow field, flow measurements with high spatial and temporal resolution are required. To analyze CCV, the resulting flow field data must be decomposed into its scales, since CCVs are different from random fluctuations due to turbulent flow motions. Besides velocity decomposition based on traditional Reynolds decomposition, which provides an average flow velocity and a fluctuation velocity, most studies include statistical and linear approaches such as proper orthogonal decomposition (POD) and Fast Fourier transformation (FFT). In this paper, time-resolved high-speed stereoscopic PIV (HS-SPIV) measurements on an optical single-cylinder engine are processed using a new nonlinear and transient decomposition method, namely the multivariate empirical mode decomposition (NA-MEMD) based on a data-driven decomposition algorithm. The decomposition is based on the inherent scales of the data and generates physically valid modal representations known as intrinsic mode functions (IMFs), which are arranged with respect to the contained scale values. The approach and the IMFs generated are described in detail using one engine cycle as an example. According to the results, three modes are obtained, the measurement noise and extremely tiny short-term scales, the turbulent scales, and the large-scale tumble vortex.
Calculation Of The Nusselt Number From Temperature And Velocity Data Obtained From Enhanced 3D Two-Colour LIF And 3D PTV In A Rayleigh-Benard Convection Cell
Authors: Kashanj S. , Saffar Y. , Sabbagh R. , Nobes D.S.
Published: July 2023

Experimental study of Rayleigh-Benard convection (RBC) requires 3D measurement of the velocity and temperature due to the complexity of the physics of this system. Using a scanning system, the application of the 3D particle image velocimetry (PTV) and 3D time-resolved two-color laser-induced fluorescence (LIF) is investigated on a slender RBC cell. Calculation of the out-of-plane velocity component by using the planar velocity components and applying the continuity law is discussed. From these observations that calculation of the dimensionless heat transfer coefficient, the Nusselt number from the 3D reconstructed temperature field close to the boundary of the fluid domain is investigated.
Particle tracer analysis for PIV experiments in a closed loop transonic wind tunnel
Authors: Manovski P. , Gulotta P. , de Silva C.M. , Brown R. , Giacobello M. , Hutchins N. , Marusic I.
Published: July 2023

A performance study of several tracer particles for PIV has been conducted. The study included particle response time analysis of an oblique shock wave generated by a conical nose of a store model in a closed loop transonic wind tunnel, and in-situ measurements of the particle size distribution in a low-speed wind tunnel facility. From the oblique shock wave analysis, the estimated particle response time for different smoke materials and generator settings was of the order of 1.4 - 2.2 μs and the effective particle size was 0.58 - 0.85 μm, which was much larger than the measured geometric mean particle size. This larger size was mainly attributed to the correlation bias towards larger particles in PIV measurements. The effective particle size from the particle response time analysis accounts for the holistic performance of the PIV system. Additionally, particle response analysis was performed on ambient water droplets resident in the tunnel. The estimated particle response time for the water droplets was in the order of 3.4 μs and the effective particle size was 0.97 μm, revealing inferior performance compared to the smoke particles.
Ray-Tracing Based Reconstruction Of PIV Measurements In The Outlet Zone Of Gaseous Flow In Packed Beds
Authors: Velten C. , Ebert M. , Lessig C. , Zähriger K.
Published: July 2023

The flow characteristics of packed beds are essential for the optimization of heat and mass transfer in countless industrial processes. In this study a method is introduced to allow optical measurement techniques in a transparent bulk reactor, so that optical distortions are corrected by a ray tracing based reconstruction. The velocity of the gas flow is measured by a classical particle image velocimetry measurement approach, where the optically distorted raw particle images, obtained through the transparent spheres, are corrected by a ray tracing step before a common cross-correlation evaluation of the velocity fields. Special calibration procedures, linking the exact geometrical set-up of the measurement equipment with respect to the packed bed reactor to the numerical model used for distortion correction, are necessary for this approach, which is validated in this study at the outlet flow field of the bed. The main principles like the experimental setup, calibration and correction method are presented and discussed, as well as the precision of the initial flow field obtained in the experimental symmetric reactor. Results of flow fields at the surface of a 17layer transparent packed bed for particle Reynolds numbers in the range of 200 to 500 show the impact and advantages of the additional ray tracing step. A validation of the ray tracing based correction method is shown by comparing the flow of the freeboard, obtained from undistorted particle images, to the flow field behind transparent spheres, which initially cause strong optical distortions in the raw particle images. The continuously evolving velocity profiles, through regions of originally strong optical distortion, show the applicability of the method even for the reconstruction of vortical structures in the interstices of spherical packings.
Higher-Order Accurate Neural Network For Real-Time Fluid Velocimetry
Authors: Manickathan L. , Mucignat C. , Lunati I.
Published: July 2023

In the present work, we introduce a novel lightweight neural network for fluid velocimetry called LIMA (Lightweight Image Matching Architecture) designed and optimized for PIV, which can potentially fit on low-cost computer hardware. We compare two versions of the network: LIMA-4, a 4-level architecture focused on fast reconstruction; and LIMA-6, a 6-level architecture focused on maximizing accuracy. We demonstrate the new approach provides more accurate prediction with fewer network parameters and faster inference speed. Furthermore, we quantified the disparity error using uncertainty quantification (UQ) by image matching to assess the prediction accuracy of the network. We assess the performance of a synthetic direct numerical simulation (DNS) dataset and a wind tunnel measurement dataset of flow past a cylinder. In all cases, we validate that the new network shows higher accuracy than the previous state-of-the-art neural network (PWCIRR) and also the classic particle image velocimetry (PIV) approach. In the future, we envision deploying the lightweight architecture on low-cost devices to provide affordable, real-time inference of the flow field during PIV measurements.
µPIV Measurements Of The Phase-Averaged Velocity Distribution Within Wavy Films
Authors: Metzmacher A. , Burgmann S. , Janoske U.
Published: July 2023

Thin-film flows are frequently used in process engineering and are still of great interest in research. In most cases, waves occur which are believed to have a positive effect on the material and heat transport and significantly influence the film properties. A combination of μ-particle image velocimetry and confocal chromatic distance measurement is used to measure phase-averaged flow velocities in film waves. A trigger signal is sent to the PIV system and a recording starts when a wave reaches the wave crest threshold. This makes it possible to trigger the μPIV system depending on the temporal film thickness. The functionality and quality of the measurements depend on the correct positioning of the confocal chromatic sensor. Simultaneously to the velocity measurement, the minimum, average, and maximum film thickness, as well as the wave amplitude and wave frequency, are recorded. Film flow is investigated on a glass plate at various angles (5˚-15˚) of inclination, Reynolds numbers (30-200), and measurement positions. The results are compared with the theoretical solutions according to Nusselt. In addition, the influence of the tilt angle and the measuring position is explained. The measuring position, in particular, has a non-negligible influence since the film properties are largely dependent on the distance to the inlet. Compared to the theoretical solutions according to Nusselt, the velocities and film thicknesses may be significantly greater due to the presence of the waves. With increasing inclination angle and distance to the inlet, the measured mean and maximum velocities of the film flow increase. They almost double when the inclination angle increases from 5˚ to 15˚. When comparing the velocities depending on the measuring position (300-500mm), it is noticeable that the velocities increase between 5-15%, depending on the angle, due to wave development and gravity.
High Spatial Resolution 2C-2D PIV Measurements Using A 47 MPx Sensor Of High Reynolds Number Turbulent Boundary Layer Flow
Authors: Sun B. , Shehzad M. , Willert C. , Foucaut J.-M. , Cuvier C. , Ostovan Y. , Atkinson C. , Soria J.
Published: July 2023

In the past decade, advances in electronics technology have made larger imaging sensors available to the experimental fluid mechanics community. These advancements have enabled the measurement of 2-component 2-dimensional (2C-2D) velocity fields using particle image velocimetry (PIV) with much higher spatial resolution than previously possible using a single camera. Although previously reported experiments have incorporated multiple-camera arrays to acquire high spatial resolution PIV, using a single large camera can greatly reduce the complexity of the experimental setup as well as the error introduced by the calibration between the cameras. In this paper, the ability of a single large sensor for high spatial resolution PIV is demonstrated by performing the measurement of a zero-pressure-gradient turbulent boundary layer (ZPG-TBL). In post-processing the PIV images, the lens distortion error is of particular importance, as the lens distortion error increases with the size of the imaging sensor. The third-order polynomial functions are used to model the lens distortion in this study, and the correction is performed on the PIV vectors to save computational cost. The first- and second-order statistics are calculated and compared with the profiles captured by small camera arrays, and the result shows that the corrected profiles agree well with the previously acquired data, therefore, the lens distortion error can be corrected.
PIV analysis of confined multiple jets impinging on a step surface
Authors: Barbosa F.V. , Teixeira S.F.C.F. , Teixeira J.F.C.
Published: July 2023

Forced convection by submerged multiple jet impingement for cooling applications is widely implemented in several industrial sectors. However, the complexity of the flow makes this process difficult to control. Therefore, it is important to conduct an in-depth study in order to characterize the flow field and this is possible through Particle Image Velocimetry (PIV) technique. PIV allows the measurement of the velocity field and information regarding flow vorticity and turbulence intensity can be obtained. To conduct the PIV measurements, an experimental setup was specially built to analyze the flow dynamics of multiple air jets impinging on a surface with a step. In PIV, the selection of the most appropriate tracer particles is crucial to ensure accurate measurements. In that sense, this work comprises an analysis of different seeding particles produced by a Concept Smoke Aerotech system. The measurement region consists of an array of multiple air jets spaced 3 D (jet diameters) between them according to a staggered configuration. The jets are confined and a distance between the nozzle plate and the target surface of 2 D is applied. The central, back, and front rows are analyzed in order to determine the effect of the jet’s interactions on the velocity fields and heat transfer. The results show that the complexity of the flow is increased by the implementation of a non-flat surface. The step induces a strong flow reversal that affects the jet flow development over the surface. Moreover, the measured data highlights the complex interactions between jets and confirm that PIV is able to capture the large-scale structures induced in the vicinity of the target plate, as well as the strong fountain flows generated between the adjacent jets. Furthermore, the results show that the combination of PIV and heat flux sensors is appropriate to characterize the jet’s flow dynamics and the heat transfer of multiple jets impinging on a surface, providing relevant insights for several engineering applications. This study underlines the advantages of the PIV system for a detailed characterization of a multiple jet impingement flow and the importance of a proper definition of the experimental condition to ensure the accuracy of the measurements.
The Interaction Between In-Cylinder Flow And Flame Propagation In An Optical SI Engine Measured By High-Speed PIV
Authors: Ikeda Y.
Published: July 2023

The relationship between the flow field and flame propagation is essential in determining the dynamics and effects of turbulent flow in an optical SI engine. In this study, the high-speed PIV technique was applied to evaluate the incylinder velocity and turbulence distribution under firing condition. The simultaneous measurement technique of incylinder flow and flame propagation characterized the relationship between flow field and flame propagation in the same cycle. A 500 cc single-cylinder optical engine was used for this experiment. The bore diameter and stroke length were 86 mm and 86 mm respectively, and compression ratio was 10.4. The flame front configuration was extracted from the PIV image based on planar laser tomography method. The strong contrast between the intensity of burned and unburned region in the captured images due to low gas and seed density of the former was utilized to derive this flame front. In order to evaluate the interaction between flame and flow with high resolution, the interrogation area was set to 16 × 16 pixels. This corresponds to 0.75 × 0.75 mm. The spatial filter of 6 mm was used to separate the instantaneous flow velocity into a low frequency component and a high frequency component. The engine speed was 1200 rpm and absolute intake pressure was 60 kPa. The equivalence ratio was stoichiometry condition. The ignition timing were set to 19 deg.BTDC. The characteristic cycles in the same test condition were extracted and discussed. The bulk flow with the large scale as large as the size of the combustion chamber influences the overall shape of the flame propagation, and the state of the flame propagation greatly fluctuates from cycle to cycle. The flame propagates with enhancing the large scale existing tumble flow that exists in earlier crank angle locations. Focusing on the local flame structure, the high-frequency velocity component was strong near the local flame peak and weak near the local flame valley. The flame at the local peak region propagates while pulling the valley region.
Simultaneous Particle Tracking Velocimetry And Pyrometry Of Spatter Particles Ejected During The Laser Power-Bed Fusion Process Using A Spectral Plenoptic Camera
Authors: Kelly D. , Fischer R.D. , Moaven M. , Morris S. , Prorok B.C. , Thurow B.
Published: July 2023

This paper aims to provide a method for simultaneous 3D particle tracking velocimetry and dual-wavelength pyrometry using a single spectral plenoptic camera for uses in spray and flow diagnostics. The spectral plenoptic camera can capture spatial, angular, and spectral information of light from the scene using a single main lens and sensor. Particle tracking is conducted using the Light-Field Ray Bundling algorithm paired with a four-frame best estimate-enhanced track initialization algorithm to generate 3D high-resolution spatial locations and velocity of particles. Secondly, a dual-wavelength pyrometry method was developed to use particle locations from Light-Field Ray Bundling to find the particle spectra for each wavelength, and then calculate temperature using the spectral intensities. This method achieves 3D particle tracking and temperature measurements using a single lens and sensor, which can be applicable for many different flow measurements. The method was applied to the spatter particle generation caused by the Laser Powder-Bed Fusion process, where spatter particles have been found to be detrimental to the manufactured parts. The calculated speeds of the spatter particles are within the expected range, and the tracks show a complex 3D process. The temperature measurements indicate that the detected particles are in the liquid phase, with temperatures greater than 2000ºC. The simultaneous measurements demonstrate an overall deceleration and cooling of particles during their flight. Therefore, this is a viable technique for simultaneous tracking and temperature measurements.
Analysis Of PIV Images Of Transonic Buffet Flow By Recurrent Deep Learning Based Optical Flow Prediction
Authors: Lagemann C. , Mäteling E. , Klaas M. , Schröder W.
Published: July 2023

In the past few years, several algorithms have been proposed that leverage deep learning techniques within the data analysis workflow of particle-image velocimetry (PIV) experiments. This emerging body of work has shown that deep learning has the potential to match or outperform state-of-the-art classical algorithms in terms of efficiency, accuracy, and spatial resolution. Due to the significant relevance of PIV experiments in the broader fluid mechanics community, progress in PIV processing approaches based on state-of-the-art machine learning tools has a major impact across a range of problems in applied physics and engineering where velocity components of flow fields need to be determined. In contrast to existing methods, these approaches are general, near-automated and yield per-pixel flow estimates. Primary work on deep learning for PIV is promising, but important questions concerning the application to challenging engineering problems remain open and more scientific analyses are necessary to substantiate the general confidence amongst practitioners in such neural network based tools. This motivates us to employ a novel deep learning based PIV approach called RAFT-PIV to a challenging application of a recent research subject. That is, we use our neural optical flow approach to evaluate Background-Oriented Schlieren (BOS) and PIV images obtained by measurements of the transonic flow around a supercritical DRA-2303 profile and demonstrate that it can be used as a direct one-to-one replacement for standard cross-correlation based counterparts.
Malicious URL Detector using Machine Learning
Authors: B K Nirupama
Published: August 2023

In recent years, the digital world has advanced significantly, particularly on the Internet, which is critical given that many of our activities are now conducted online. the risk of a cyberattack is rising rapidly. One of the most critical attacks is the malicious URL intended to extract unsolicited information by mainly tricking inexperienced end users, resulting in compromising the user’s system and causing losses of billions of dollars each year. In this paper, we provide an extensive literature review highlighting the main techniques used to detect malicious URLs that are based on machine learning models, taking into consideration the limitations in the literature, detection technologies, feature types, and the datasets used. In this research paper we have implemented the application that it can check the URL given by the user is benign, defacement, malware, phishing. After checking then it will display the type of URL in user interface. The increasing sophistication of cyber threats, particularly in the form of malicious URLs, poses a significant challenge to internet security. Traditional signature-based approaches and heuristic methods have proven insufficient in detecting rapidly evolving malicious URLs.This research paper presents a comprehensive study on the development and evaluation of a malicious URL detector based on machine learning known and novel malicious URLs. Keyword: Phishing, URL, machine learning, cyber security, random forest, malicious.
Tingkat Pengetahuan Pasangan Usia Subur tentang Kontrasepsi di RW XI Desa Makamhaji Kecamatan Kartasura
Authors: Adi Yovita Dewi Septya , Adiningsih Retnowati
Published: July 2023

Pasangan di Indonesia yang menggunakan teknik kontrasepsi telah meningkat dan sekarang mencapai 61,4% dari semua pasangan tersebut. Menurut survei Pattypeilohy (2018) di Kupang, 57 orang (atau 57% dari populasi) memiliki sedikit atau tidak ada pemahaman tentang kontrasepsi. Kurangnya kesadaran tentang kontrasepsi pada pasangan usia subur menyebabkan kegagalan penggunaan alat kontrasepsi karena mempengaruhi perilaku, sikap, motivasi, dan tindakan mereka tentang kehamilan. Setiap teknik memiliki kelebihan dan kekurangan. Banyak wanita percaya bahwa menggunakan perlindungan kadang-kadang dapat menimbulkan masalah, yang mungkin memaksa mereka untuk menggunakan metode kontrasepsi yang tidak sesuai dengan efek negatifnya atau sama sekali tidak menggunakannya. Penelitian ini bertujuan untuk mengetahui seberapa banyak informasi yang dimiliki pasangan di RW XI Kelurahan Makamhaji Kecamatan Kartasura tentang kontrasepsi. Alat penelitian untuk penelitian ini adalah kuesioner tertutup, yang merupakan bagian dari metodologi deskriptif kuantitatif. Pasangan suami istri di RW XI Desa Makamhaji Kecamatan Kartasura yang berusia subur menjadi sampel penelitian ini yang berjumlah 110 orang. Berdasarkan temuan penelitian, 67 partisipan (60,9%) memiliki pengetahuan tinggi, 27 partisipan (24,5%) pengetahuan cukup, dan 16 partisipan (14,5%) pengetahuan kurang.
Analisis Kadar Fenolik Total dari Ekstrak Etanol dan Ekstrak Terpurifikasi Daun Oyong (Luffa acutangula (Linn.) Roxb.)
Authors: Istiqomah Ridha , Lindawati Novena , Utami Nastiti
Published: July 2023

Metabolit sekunder yang terdapat pada daun oyong (Luffa acutangula (Linn.) Roxb.) antara lain fenolik, flavonoid, saponin, terpen dan tanin. Senyawa fenolik memiliki peran penting sebagai  antioksidan. Antioksidan mampu menjaga tubuh dari penyakit degeneratif yang diakibatkan oleh kerusakan sel akibat radikal bebas. Ekstrak yang mengalami proses purifikasi akan memberikan kadar total fenolik yang berbeda pada ekstrak kasar. Pada penelitian ini akan ditetapkan kandungan total fenolik ekstrak etanol dan ektrak terpurifikasi daun oyong. Maserasi dengan etanol 96% digunakan sebagai teknik ekstraksi. Teknik ekstraksi cair-cair digunakan untuk purifikasi ekstrak dengan air hangat, n-heksan dan etil asetat sebagai pelarut. Kandungan fenolik dideteksi dengan Kromatografi Lapis Tipis (KLT), fase diam silica gel , fase geran n-heksan : etil asetat : methanol (2:7:2). Kadar fenolik diukur dengan spektrofotometri UV-vis, pereaksi Folin-Ciocalteau dan standar asam galat. Kadar total fenolik yang didapat pada esktrak etanol dan ekstrak terpurifikasi daun oyong yaitu (34,000 ± 0,350) mg GAE/gram esktrak dan (40,117 ± 0,195) mg GAE/gram ekstrak. Ekstrak terpurifikasi memiliki kadar lebih besar karena melalui tahap purifikasi yang menghasilkan ekstrak murni dengan kandungan senyawa lebih besar.