bluuebunny/crossref_metadata_2025 huggingface dataset:
Fluid Structure Interaction Analysis of Natural Convective Flow and Heat Transfer in an L-Shaped Cavity
Authors: Bader Alshuraiaan
Published: October 2023

The primary objective of this research work is to perform a numerical study on the fluid-structure interaction (FSI) of flow and heat transfer characteristics within an L-shaped cavity. The investigation will focus on analyzing the effects of various key variables, namely the Rayleigh number and wall elasticity, on the observed results. To accomplish this, the COMSOL software, which utilizes the finite element method, will be employed as the numerical simulation tool. To ensure the reliability and credibility of the obtained results, the findings of this research were rigorously validated against previously published data available in the literature. The outcomes of this investigation were presented using various visualization techniques. Streamlines, temperature contours, and heat transfer enhancement will be among the visual representations used to illustrate the flow and temperature distribution within the L-shaped cavity. Anticipated results indicated that the calculations of the average Nusselt number exhibited a strong dependency on the Rayleigh number and the wall elasticity. As such, the average Nusselt number was higher for flexible wall compared to rigid wall model. Moreover, the average Nusselt number was found to increase with an increase in Rayleigh number. Young’s modulus was found to have a profound effect on the patterns of the streamlines. The average Nusselt number was found to decrease with an increase in the Young’s modulus. This study may provide valuable insights into optimizing heat transfer and designing efficient thermal management systems for various practical applications.
Subacute Cutaneous Lupus Erythematous
Authors: Saphi Mukesh Kumar , Yadav Sunny Kumar , N Bhavya , Shah Krishnadev , Kumar Amit
Published: October 2023

Subacute Cutaneous Erythematous (SCLE) is an Auto-Immune skin disorder that cause skin sores and rashes when your immune system attacks itself. In this case report describe 39 years old female patient with SCLE. It is characterized by either ring-shaped red scaly border and also scaly red bumps in sun exposed areas associated with itching, pain and burning sensation. In this case, the patient has a multiple red colour lesions initially on the upper back region then spread to B/L UL, abdomen, chest, face and LL which is aggravating to sunlight. The patient is having a history of skin burns like lesions, tuberculomas and SJS. The diagnosis of SCLE was revealed by clinical presentation, Skin biopsy result and laboratory finding i.e. ANA Test was found to be highly positive and confirms that it is an autoimmune disease. The patient was treated with corticosteroid drug, DMARDs along with antihistaminic drugs and supportive therapy like nutritional supplements and skin lotion for external application, which led to significant improvement in the lesion formation and other symptoms. The case report highlights the careful monitoring and appropriate treatment of SCLE.
Menghitung Kecepatan Kenderaan Bergerak (Running Speed)
Authors: Yusra Cut Liliiza , Novriza Ferdiansyah
Published: October 2023

AbstractAbstract -  The highway is a transportation infrastructure that is very important in helping the development of the region, so that with a smooth transportation flow it will have a lot of influence in supporting the pace of development that tends to increase community growth. In terms of driving on the road, you must pay attention to personal safety by paying attention to the speed of the vehicle. This study will calculate the moving speed of motorized vehicles using the running speed survey method. It is necessary to carry out a deeper analysis, because the more complicated the problems faced, the more complete the analysis that can be done. To get good results, it is very necessary to have complete and accurate data or information accompanied by relevant theories or basic concepts for the road section to be investigated on the Meulaboh - Tapak Tuan road, Suak Puntong Village, Kuala Pesisir District, Nagan Raya Regency. The average moving speed for the Meulaboh - Tapak Tuan road is 48.31 km/hour. The maximum moving speed for the Meulaboh – Tapak Tuan road is 87.80 km/hour. Keywords:Road, Running Speed.__________________________ AbstrakJalan raya adalah suatu prasarana transportasi yang sangat penting dalam membantu pengembangan wilayah, sehingga dengan adanya arus transportasi yang lancar maka akan banyak memberikan pengaruh di dalam menunjang laju pembangunan yang cenderung meningkatkan pertumbuhan masyarakat. Dalam hal berkendaran di jalan, haruslah memperhatikan keselamatan diri dengan memperhatikan kecepatan kendaraan, Hal tersebut bertujuan untuk pengendara satu dengan pengendara yang lain terjamin keselamatannya sampai ke tujuan. Penelitian ini akan menghitung kecepatan bergerak  kendaraan bermotor  metode survei kecepatan kendaraan bergerak (running speed). Perlunya dilakukan analisis yang lebih dalam lagi, dikarenakan semakin rumit permasalahan yang dihadapi akan semakin komplit pula analisis yang dapat dilakukan. Untuk mendapatkan hasil yang baik, maka sangatlah diperlukan data atau informasi yang lengkap dan akurat disertai dengan teori atau konsep dasar yang relevan ruas jalan yang akan diteliti ruas  jalan  Meulaboh - Tapak Tuan Desa Suak Puntong Kecamatan Kuala Pesisir Kabupaten Nagan Raya. Kecepatan bergerak rata-rata untuk jalan Meulaboh - Tapak Tuan sebesar 48,31 km/jam. Kecepatan bergerak maksimum untuk jalan Meulaboh – Tapak Tuan sebesar 87,80 km/jam. Kata Kunci:Jalan Raya, Kecepatan Bergerak.
EFFECT OF INTEGRATED REPORTING AND ENVIRONMENTAL REPUTATION ON COMPREHENSIVE DECISION-MAKING NON-PROFESSIONAL INVESTORS
Authors: Widyatama Arif , Agustia Dian , Ardianto Ardianto , Soewarno Noorlailie
Published: October 2023

This study is to examine the effect of integrated reporting and environmental reputation on the comprehensive decision-making by non-professional investors. Specifically, this study examines the process investors use to make comprehensive decisions (i.e. acquisition, evaluation, weighting, and judgment) when seeing information about companies’ integrated reporting and environmental reputations. We use a web-based experiment, or 2x3 between-subjects design, to investigate whether companies’ integrated reporting and environmental reputations have any influence on non-professional investors’ comprehensive decision making. 157 participant randomly selected students to serve as surrogate investors in this experiment. The data obtained were then tested using ANOVA and followed by a post hoc test. The findings show that companies that provide integrated reporting and have an environmental reputation make it easier for non-professional investors to make comprehensive decisions. Research on integrated reporting is scarce. There has been some research on the relationship between integrated reporting and investment decision making, but the environmental reputation of the relationship between integrated reporting and investment decisions has not been extensively explored. In fact, environmental issues are global issues. Furthermore, we argue that this research is very important to be carried out in Indonesia, considering that the arrangements regarding the presentation of various information can be carried out in an integrated or separate manner. This study can provide suggestions for regulators about the importance of regulations regarding the obligation to present financial and non-financial information in an integrated manner.
The invasive mollusk Rapana venosa (Mollusca: Neogastropoda: Muricidae) in the mid-southern Black Sea: Distribution, growth, and stock structure
Authors: Dağtekin Murat
Published: October 2023

The rapa whelk, Rapana venosa (Valenciennes, 1846), known also as the veined rapa whelk or the Asian rapa whelk, settled in the Black Sea in 1940 and within the past 30 years has become an important economic contribution to local fishers along the coastline. This study examines the annual change in biomass, population structure, and interaction of the species with the ecosystem of rapa whelk in the mid-southern Black Sea. The samples were collected monthly in 2011 and 2012 by hydraulic dredge at different sites. Stock biomass was estimated at five different subregions and along four depth contours. In 2012 the biomass of rapa whelk increased significantly in in all subregions compared with the previous year sampling. Food availability is the main factor for species distribution, and in parallel, striped Venus clams, Chamelea gallina (Linnaeus, 1758), the main food source for rapa whelks, was significantly concentrated in the study area. The von Bertalanffy growth parameters (VBGP) were expressed as Lt = 121.78(1 − e−0.246(t + 0.33)). As a fisheries management point, our results highlight the overpopulation of rapa whelk in the region.
Promoting Clinical and Cultural Competence in the Nursing Care of Transgender Patients: An Educational Module for Postoperative Nurses Caring for Patients After Vulvovaginoplasty
Authors: Angelov Marleah , Rolfe Witham Bethany
Published: October 2023

Background:

Transgender women and transfeminine nonbinary individuals may pursue a vulvovaginoplasty to improve their gender dysphoria. The goal of this study was to design, implement, and evaluate an educational module to increase acute care nurses' clinical and cultural skills in the care of the transgender population after vulvovaginoplasty.

Method:

All nursing staff and patient care technicians working on a hospital unit caring for patients after vulvovaginoplasty attended a 4-hour educational module. Participants completed an anonymous pre- and postsurvey. Survey data were analyzed for significant change in the categories of knowledge, perceived competence, sexuality and gender beliefs, interpersonal comfort, and human value.

Results:

Significant improvement was noted in the categories of knowledge and perceived competence. Improvements were also noted in the categories of sexuality and gender beliefs and interpersonal comfort, but were not statistically significant. An insignificant decline in scores was noted in the category of human value.

Conclusion:

Increased knowledge about vulvovaginoplasty and informed, culturally safe care may improve the patient outcome and experience, and nurses may be more confident and comfortable delivering care for this population. This intervention may serve as an exemplar to other institutions that hope to offer gender care surgeries.

[
J Contin Educ Nurs
. 2023;54(11):509–515.]
“They Don't Have Time, But It Would Be Wonderful”: Residents' Views of Their Relationships With Staff
Authors: White Diana , Hasworth Serena
Published: October 2023

Resident–staff relationships is a component of person-centered care (PCC); positive relationships are associated with positive outcomes. The current article explores the finding that residents living in different types of long-term care assigned the lowest ratings of importance to the PCC domain “relationships with staff ” (one of eight domains studied). Thematic analysis of spontaneous comments made by residents during interviews identified two themes,
Relationship Preferences
(for privacy, boundaries, engagement) and
Lived Experience With Staff
(staff busyness, staff interactions). Low ratings of relationship importance may reflect preferences for privacy and maintaining boundaries with staff. Ratings by some residents may be related to staff busyness, an overarching theme. Staff busyness was associated with lack of personal interaction with staff, including for those who expressed preferences for engagement and those who described positive interactions with staff. Some residents may reappraise their views about the importance of relationships to reduce cognitive dissonance. Improving job quality is necessary to assure quality time with residents. [
Journal of Gerontological Nursing, 49
(11), 8–14.]
Tales of Downward Mobility: Life of Pi and Virtual Camera Movement in Liquid Modernity
Authors: Whissel Kristen
Published: October 2023

This article analyzes how the virtual camera’s downward, submarine movement in Life of Pi’s “tiger vision” sequence emblematizes the protagonist’s descent into “liquid modernity” and gives spectacular expression to the forces of global capitalism that have, since the 1970s, sent the world—and visual effects labor—plunging toward catastrophe.
Prediction of Coaxial Rotor Hub Flow Using Mercury Framework
Authors: Su Jung Yong , Lee Bumseok , Baeder James
Published: October 2023

Rotor hubs are predominantly responsible for the parasitic drag encountered by high-speed rotorcraft. To gain a deeper understanding of the fluid dynamics around rotor hubs, simulations of counter-rotating coaxial rotor-hub flows were conducted, which was subsequently followed by a
corroborative experiment at Pennsylvania State University. The simulation process employed a computational fluid dynamics framework termed “Mercury,” which utilizes an unstructured/Cartesian multimesh paradigm. This process incorporated Spalart???Allmaras delayed detached eddy
simulation turbulence modelling for an accurate representation of the flow. The investigation into the coaxial hub flow physics was conducted at two different advance ratios: 0.25 and 0.6, constructed by building up the hub components. The interaction between the hub and fairing components
led to an increase in the average hub drag and caused unsteady harmonics in the hub and fairing drags. Furthermore, it was noted that different advance ratios affected the drag and wake structures. The complete hub model was then simulated in a water tunnel with an advance ratio of 0.25. Predictions
of mean and unsteady drag, as well as mean wake velocity fields, were compared with the experimental results. Overall, the mean wake velocity field from the simulation qualitatively aligned with the experimental results, especially in the near-wake region. Additionally, the buildup model analysis
significantly aided in understanding the intricate wake structures surrounding the hub.
Variable-rate spray system for unmanned aerial applications using lag compensation algorithm and pulse width modulation spray technology
Authors: Wang Zhongkuan , Wen Sheng , Lan Yubin , Liu Yue , Dong Yingying
Published: October 2023

To ensure that a variable-rate spray (VRS) system can perform unmanned aerial spray in accordance with a prescription map at different flight speeds, we examine in this paper such significant factors as the response time of the VRS system and the pressure fluctuation of the nozzle during the variable-rate spraying process. The VRS system uses a lag compensation algorithm (LCA) to counteract the droplet deposition position lag caused by the system response delay. In addition, pulse width modulated (PWM) solenoid valves are used for controlling the flowrates of the nozzles on the variable-rate spray system, and a mathematical model was constructed for the spray rate (L min-1) and the relative proportion of time (duty cycle) each solenoid valve is open. The pressure drop and solenoid valve response time at different duty cycles (50%~90%) were measured by indoor experiments. Meanwhile, the lag distance (LD), spray accuracy, and droplet deposition characteristics of the VRS system were tested by conducting outdoor experiments at different flight speeds (4m s-1, 5m s-1, 6m s-1). The results show that LCA can effectively reduce the lag distance. The lag distance (LD) values of the VRS system with LCA ranged from -0.27 to 0.78m with an average value of 0.32m, while without LCA, the LD values increased to 3.5~4.3m with an average value of 3.87m. The overall spray position accuracy was in the range of 91.56%~97.32%. Furthermore, the spray coverage and deposition density, determined using water sensitive paper (WSP), were used to evaluate the spray application performance taking into account the spray volume applied. The VRS system can provide the most suitable spray volumes for insecticide and fungicide plant protection products. Based on a prescription map, the optimized VRS system can achieve accurate pesticide spraying as well as desirable spray coverage and deposition density.
NOx Measurement and Characterization in a Gaseous Fueled High-Pressure Direct-Injection Engine
Authors: Hurren Troy , Kirchen Patrick
Published: October 2023

Heavy-duty (HD) vehicles are a crucial part of the transportation sector; however, strict governmental regulations will require future HD vehicles to meet even more rigid NOx emission standards than what already exist. The use of natural gas (NG) as the primary fuel in HD vehicles can immediately reduce the NOx emissions through lower flame temperatures as compared to traditional diesel and can serve as a precursor to even less carbon intensive fuels as they become more readily available. Pilot ignited direct injection natural gas (PIDING) engine technology is one example of how NG can be used in HD vehicles while maintaining diesel-like efficiency. However, NOx emissions still need to be mitigated to avoid negative air quality effects. Exhaust gas recirculation (EGR) is known to reduce in-cylinder temperatures and thus reduce in-cylinder NOx emissions in diesel engines, but the effects of EGR are not as well understood in PIDING engines. The intent of this study is to develop a better understanding of the sensitivity of NOx to the specific effects of EGR in PIDING engines by experimentally identifying the limits of EGR on a single cylinder research engine (SCRE). Two different equivalence ratios (φ) of 0.6 and 0.7 were used while maintaining engine load at 12 bar GIMEP, combustion phasing, and engine speed throughout an EGR sweep. The maximum EGR rate tested was ∼50% for each φ. Combustion instability (measured by the coefficient of variability (COV) of peak cylinder pressure (PCP) and GIMEP) increased by 2 and 3% at maximum EGR for φ = 0.6 and 0.7 respectively. NOx emissions were reduced ∼80% up to 25% EGR. However, NOx sensitivity to the effects of EGR diminish significantly at rates above 35%. The inverse is also true for particulate matter (PM) and methane in that these emissions significantly increase at EGR rates above 35%. Lastly, exhaust mounted electrochemical NOx sensors were found to be effective and comparable to lab-grade emissions analyzers while being more cost effective and less intrusive.
Clinical Delivery of Overground Exoskeleton Gait Training in Persons With Spinal Cord Injury Across the Continuum of Care: A Retrospective Analysis
Authors: Arnold Dannae , Gillespie Jaime , Bennett Monica , Callender Librada , Sikka Seema , Hamilton Rita , Driver Simon , Swank Chad
Published: October 2023

Background:

After spinal cord injury (SCI), inpatient rehabilitation begins and continues through outpatient therapy. Overground exoskeleton gait training (OEGT) has been shown to be feasible in both settings, yet its use as an intervention across the continuum has not yet been reported.

Objectives:

This study describes OEGT for patients with SCI across the continuum and its effects on clinical outcomes.

Methods:

Medical records of patients with SCI who completed at least one OEGT session during inpatient and outpatient rehabilitation from 2018 to 2021 were retrospectively reviewed. Demographic data, Walking Index for Spinal Cord Injury-II (WISCI-II) scores, and OEGT session details (frequency, “walk” time, “up” time, and step count) were extracted.

Results:

Eighteen patients [male (83%), White (61%), aged 37.4 ± 15 years, with tetraplegia (50%), American Spinal Injury Association Impairment Scale A (28%), B (22%), C (39%), D (11%)] completed OEGT sessions (motor complete, 18.2 ± 10.3; motor incomplete, 16.7 ± 7.7) over approximately 18 weeks (motor complete, 15.1 ± 6.4; motor incomplete, 19.0 ± 8.2). Patients demonstrated improved OEGT session tolerance on device metrics including “walk” time (motor complete, 7:51 ± 4:42 to 24:50 ± 9:35 minutes; motor incomplete, 12:16 ± 6:01 to 20:01 ± 08:05 minutes), “up” time (motor complete, 16:03 ± 7:41 to 29:49 ± 12:44 minutes; motor incomplete, 16:38 ± 4:51 to 23:06 ± 08:50 minutes), and step count (motor complete, 340 ± 295.9 to 840.2 ± 379.4; motor incomplete, 372.3 ± 225.2 to 713.2 ± 272). Across therapy settings, patients with motor complete SCI experienced improvement in WISCI-II scores from 0 ± 0 at inpatient admission to 3 ± 4.6 by outpatient discharge, whereas the motor incomplete group demonstrated a change of 0.2 ± 0.4 to 9.0 ± 6.4.

Conclusion:

Patients completed OEGT across the therapy continuum. Patients with motor incomplete SCI experienced clinically meaningful improvements in walking function.
Ultrasound-Guided Transversus Abdominis Plane Block Versus Intraperitoneal Instillation of Bupivacaine after Laparoscopic Cholecystectomy – A Randomized Control Trial
Authors:   Department of Anaesthesia, Command Hospital, Lucknow, Uttar Pradesh, India, Matam Rajesh , Chawla Vikas , Trivedi Shaleen , Bhardwaj Ajit , Singh Shivinder
Published: October 2023

Background: Postoperative pain prolongs hospital stay after laparoscopic cholecystectomy and remains a major challenge during the postoperative period. Effective pain control encourages early ambulation, which significantly reduces postoperative complications. In recent years, multimodal analgesia has been recommended with fewer adverse effects and more effective analgesia. The primary objective of this study was to compare the efficacy of analgesia between Transversus Abdominis Plane Block (TAP) Block and intraperitoneal instillation of bupivacaine by comparing the meantime of the first dose of rescue analgesia in either group and the total supplementary analgesia required. Methods: This retrospective observational study was conducted on 150 patients who underwent laparoscopic cholecystectomy Group 1 comprised of patients who had received Intraperitoneal Bupivacaine for analgesia and Group 2 received TAP Block for pain relief. Results: Time of the first dose of analgesia after surgery was observed earlier in Group 1 as compared to Group 2 (Time – hours: 9.2 ± 2 vs. 12.3 ± 1.6; p = 0.0001. The Total dose of analgesic was higher in the Intra Peritoneal Bupivacaine Group as compared to the TAP group. Conclusion: AP block provided for a better quality of analgesia as assessed by the reduced requirement of intravenous supplementary analgesia which was less in patients who were given TAP Block as compared to local instillation of Bupivacaine. Keywords: Cholecystectomy, Bupivacaine, Transversus abdominis plane block
Learning Style Preferences and Its Effect on Academic Performance Among Undergraduate Medical Students at Government Medical College, Palakkad
Authors:   Department of Community Medicine, Government Medical College, Palakkad, 678013, Kerala, India, Zachariah Shilu Mariam , Karthikeyan S , Deepak K S
Published: October 2023

Introduction: Learners have their own preferences in receiving and processing information. Finding out different learning styles of students is important to provide students with a better learning experience. Aims: To find out the different learning styles of students and association of gender and academic performance with learning styles. Methods and Material: A cross-sectional study was conducted among 100 medical students using convenience sampling method. The questionnaire used in the study was Honey and Mumford Learning Style Questionnaire. Learning styles were accordingly described as Activist, Theorist, Pragmatist and Reflector. Socio-demographic variables like age and gender as well as previous university examination score of the students were also collected. The data was analysed in terms of proportions, chi-square test and one-way ANOVA. Results: Out of 100 students, 74% were females and the remaining 16% were males. The highest mean value of the scores was found for reflector style of learning (15.59±2.4) followed by pragmatist (13.4±2.6). The lowest mean score was found for activist style of learning (12.26±3.0). 51.1% of students showed very strong inclination for activist learning style, 40% of students showed a strong inclination for reflector learning style, 45.6% had a moderate preference for theorist learning style and 55.6% of students had a moderate preference for pragmatist learning style. Conclusions: The students had more preference for activist and reflector learning styles. Gender and previous academic performance did not show any significant association with the learning styles. Keywords: Learning styles, Honey and Mumford questionnaire, Activist, Theorist, Pragmatist Reflector, academic performance
Designing A Practical Remote-Control Vessel Using LA Antenna Radio Frequency
Authors: Kurniawan Edi , Alia Diana , Nurdiansari Henna , Wibisono Yohan
Published: October 2023

One of the developments in the technology field is remote control using both wires (wired) and without wires (wireless). Wireless power can be done using signals such as infrared, bluetooth, radio frequency, and Wi-Fi. Remote control using radio frequency signals is very interesting because it can reach far distances without spending money. The purpose of this study is to develop a design and analyze the effectiveness of remote control of ships using radio LA antenna frequencies.  Wireless radio frequency signals combined with Arduino can control the propeller and rudder so that the boat can be controlled remotely. This research uses a prototype method in the form of a control ship. The result of the study is that wireless remote control of the vessel can be done in open and closed spaces so that in the future it can be realized for absolute equipment control. The control on this prototype uses an LA antenna and no LA antenna. The result of the study is that the use of LA antennas is more effective than without LA antennas, in which the control distance in an enclosed space (with obstructions) without an LA antenna is as far as 100m and 500m when using an LA antenna. While the control distance in open spaces (without obstructions) without LA antennas, ships can be controlled up to distances of 1000m and 1300m when using LA antennas.
An Investigation of Wellbore Instability in Problematic Formations from Eridu Oil Field, Southern Iraq
Authors: Kareem Ahmed , Almahdawi Faleh
Published: October 2023

Wellbore instability is a main challenge and contribute to suspending the drilling operations that lead to over-well time, known as Non-productive time (NPT). The cost of drilling operation can be reduced by using a geomechanical model that contributed enormously to the design of an appropriate mud weight window and determined the optimum well trajectory for the plan well. Several wellbore instability encountered while drilling operations in the Eridu oil field, such as (hole collapse, losses, caving, and tight hole). In this study, a geomechanical model (MEM) was developed by using the related data (open hole log measurements, core analysis data, drilling observation data), then these data were utilized in software (Techlog, version 2021). Two failure criteria (Mogi –Coulomb and Stassi d’ Alia failure criteria) were used for the prediction the breakdown and breakout profile; moreover, address the optimum mud window to mitigate wellbore instability-related issue for different well trajectory. The geomechanics results demonstrated that the Mogi failure criterion produced reasonable results when combined with the caliper log. Also, the Eridu oil field fault regime is divided into two regions: strike-slip faults in carbonate rocks and normal faults in clastic rocks. To avoid a majority of wellbore instability problems in shale formations, the safe mud weight range is 11-12.5 ppg. The failure analysis, especially shear failure, showed that the mud weight used previously in this field is improper to support the rock on the wellbore wall. This study’s finding could be used as a cost-effective tool when the plan to drill a direction and horizontal well in Eridu oil field..
Mineralogy and Provenance of Iron Sand Deposits from Cipatujah and Cikalong, Tasikmalaya, West Java, Indonesia
Authors: Zahra Hariro , Idrus Arifudin , Handayani Tatik , Ernowo Ernowo , Suwahyadi Suwahyadi , Sunuhadi Dwi
Published: October 2023

Provenance, paleoweathering, and tectonic environment were studied on the iron sand samples taken from Cipatujah and Cikalong areas in Tasikmalaya, West Java, Indonesia using their mineralogical and geochemical data. These data were obtained from mineralogy grain analysis, X-ray fluorescence, dan ICP MS. From this study, iron sand deposits in both areas vary in grain sizes from very coarse to fine sand. Various minerals, such as magnetite, ilmenite, hematite, pyroxene, amphibole, garnet, quartz, ankerite, plagioclase, and zircon were identified. In addition, rock fragments, fossils, and clay are also found. In term of grain size, the placer deposit is geochemically classified as Fe shale (clay-silt grain size). The provenance shows that the basic rocks act as the source rock based on REE values, heavy mineral assemblage, and elemental ratios. Based on the provenance characteristics, regional geological framework, and catchment area pattern, the Jampang Formation and Young Formation of Mount Cikuray are the most possible sources of iron sand. The chemical index of alteration calculated from major oxide values indicates that the source area had intense chemical weathering. Heavy minerals contained in iron sand deposits reveal a low maturity based on compositional variability (16.58–36.55). Both iron sand deposits from Cipatujah and Cikalong originated in a continental arc setting, which coincides with the current tectonic setting of western Java.
Vulnerabilities in the Animal By-Products Food System
Authors:   University of Oxford, Hasnain Saher ,   Food Standards Agency
Published: October 2023

This work was carried out by the Food Systems Transformation Group at the University of Oxford’s Environmental Change Institute and the University of York. This report has been produced by University of Oxford under a contract placed by the Food Standards Agency (the Agency). The views expressed herein are not necessarily those of the Agency. University of Oxford warrants that all reasonable skill and care has been used in preparing this report. Notwithstanding this warranty, University of Oxford shall not be under any liability for loss of profit, business, revenues or any special indirect or consequential damage of any nature whatsoever or loss of anticipated saving or for any increased costs sustained by the client or his or her servants or agents arising in any way whether directly or indirectly as a result of reliance on this report or of any error or defect in this report. We gratefully acknowledge expert advice and review by Dr John Ingram, University of Oxford; Dr Monika Zurek, University of Oxford; and Dr Philip Garnett, University of York.
Finite element analysis of stress distribution in 3D tooth model with extensive cavities restored with direct and indirect composite restoration
Authors:   University of Novi Sad, Faculty of Medicine, Department of Dental Medicine, Serbia, Kantardžić Ivana R. , Ramić Bojana D. ,   University of Novi Sad, Faculty of Medicine, Department of Dental Medicine, Serbia, Vukoje Karolina ,   University of Novi Sad, Faculty of Medicine, Department of Dental Medicine, Serbia, Lainović Tijana Z. ,   University of Novi Sad, Faculty of Medicine, Department of Dental Medicine, Serbia, Vasiljević Darko M. ,   University of Belgrade, Institute of Physics, Photonics Centre, Serbia, Blažić Larisa ,   University of Novi Sad, Faculty of Medicine, Department of Dental Medicine, Serbia
Published: October 2023

Restoring a tooth with extensive loss of biological structures is a major challenge for any clinician, as it affects biomechanical properties and survival rate of the restored tooth. Using numerical simulation with finite element analysis (FEA), this study aimed to determine the influence of two types of extensive cavities (MOD – mesio-occlusal-distal cavity, MODBP – mesio-occlusal-distal cavity with buccal and palatal cusp reduction) and two different restorations (CRd-direct composite restoration, CRi-indirect composite restoration) on the stress distribution in 3D tooth models. First, a 3D model of an intact tooth was generated based on the CT scans of an extracted maxillary premolar. Then, four additional models were created with a combination of each cavity and restoration type. All 3D tooth models were subjected to a static occlusal load of 200 N to simulate masticatory forces. The results showed that CRi with MODBP cavity provides the most favourable stress distribution in the remaining tooth structures, thus suggesting that cusp reduction and a restorative material with a higher modulus of elasticity biomechanically protect the remaining tooth structures.
The effects of a selected methoxy substituted chalcone in human melanoma cells irradiated with γ-rays
Authors:   University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Department of Molecular Biology and Endocrinology, Keta Otilija , Petković Vladana ,   University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Department of Molecular Biology and Endocrinology, Đorđević Neda ,   University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Department of Molecular Biology and Endocrinology, Đorđević Miloš ,   University of Belgrade, Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Department of Molecular Biology and Endocrinology, Ivković Branka ,   University of Belgrade, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Serbia, Dobričić Vladimir ,   University of Belgrade, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Serbia
Published: October 2023

Given the well-established potential of chalcones in modulating the response of cancer cells to therapeutic interventions, coupled with the growing imperative to enhance their biological attributes, the objective of this study was to synthesize a methoxy-substituted chalcone (OCH3) and assess its capacity to amplify the inhibitory effects of radiation in melanoma cells known for their resistance to radiotherapy. The A375 melanoma cells were subjected to a clinically relevant dose of 2 Gy gamma irradiation. OCH3 was employed either as a standalone treatment or in conjunction with irradiation. The obtained results unveiled the substantial radiosensitizing potential of OCH3 within this specific cell line. Our subsequent investigations will be designed to investigate the underlying mechanisms that contribute to the radiosensitizing properties of OCH3. Moreover, we intend to evaluate the efficacy of OCH3 against other types of radioresistant cancer cells. The presented data not only illuminates the enhanced therapeutic possibilities offered by OCH3 but also highlights its potential as a valuable agent in addressing a wider array of challenging malignancies.
Obrazovanje vaspitača za partnerski odnos sa porodicom
Authors:   University of Kragujevac, Faculty of Education in Užice, Stamatović Jelena , Nikolić Nataša ,   University of Kragujevac, Faculty of Education in Užice
Published: October 2023

A partnership between preschool educators and parents is a necessity of modern preschool education. The pillars of the initiation and development of this process are certainly preschool teachers who have the necessary competencies. Basic education and training must provide educators with the opportunity to develop these competencies and adopt positive attitudes about them. Our paper aims to examine how future preschool educators estimate their competencies for establishing partnerships with parents. The research sample comprised first-year and fourth-year students of five education and pedagogy faculties in Serbia, or, more precisely, students involved in preschool teacher training programs (156 students). A scaling technique and an assessment scale as an instrument were applied. The results show that future preschool teachers have, for the most part, positive attitudes about competencies that allow teachers to establish and maintain positive relationships and communication with parents, provide support, and jointly participate in educational activities, as the basis for partnership. The fourth-year students assessed their competencies higher than the first-year students. The teachers’ competencies for supporting parents in involving children in extracurricular preschool activities in their local communities were assessed as the least developed.
Uloga scenske lutke u razvoju govora dece predškolskog uzrasta
Authors:   University of Niš, Pedagogical Faculty, Vranje, Protić Anđela D.
Published: October 2023

A doll, being one of the most interesting and beautiful toys of every child, helps children to relax, enrich vocabulary and imagination, as well as create both the imaginary and the real world. Encouraging speech in preschool is very important, and the activities that use stage puppets have a great impact on preschoolers' speech development. A stage puppet moves the thought, emotional, and social world and allows the child to express his/her own experience of the world through words, movements, and music. By using puppets, the educator and the child can more easily establish verbal and nonverbal communication with others in the group and cope with many life situations that are difficult for preschool children. Therefore, this paper reflects on the advantages of using stage puppets and their influence on preschool children's speech development.
Acquisition of some Social Characteristics of the Childʼs Environment in the Preschool Period trough Singing in a Choir
Authors:   University of Primorska, Faculty of Education, Koper, Slovenia, Jenko Matija , Kopačin Barbara ,   University of Primorska, Faculty of Education, Koper, Slovenia
Published: October 2023

The Curriculum for kindergartens (hereinafter the curriculum) is a national document, which is intended both to respect the tradition of Slovenian kindergartens, as well as to familiarize with newer theoretical views on early childhood education and the implementation of different solutions and approaches, thereby complementing, changing and upgrading the work in kindergartens. In this way, social science topics and goals, which are written in the curriculum in the subsection Society, can be achieved with interdisciplinary and integrated goals. With the children who sing in the preschool choir, we talked about social science topics through a group conversation. Through the study, we find that choir singing of children in the preschool period leads them to know the importance of cooperation and the importance of the community. We also learn that cooperation and helping others are the key to the functioning of the community and that it is important for everyonein society to cooperate and contribute to the common good. In addition, singing in the preschool period also helps in the development of social skills and the promotion of empathy, as singing in a choir also prepares children for the integration into society.
Socijalna interakcija dece u kontekstu rada na projektima
Authors:   University of Niš, Faculty of Philosophy, Manić Iva
Published: October 2023

Since a child is a unique and complete being, rich in innate potential and capable of actively acquiring knowledge and skills, a preschool institution strives to provide a stimulating environment for participation in the activities the child shows initiative for. Accordingly, project work as a modern approach becomes an increasingly relevant topic in the practice of preschool education. The social interactions that the child establishes during this process direct the course of behavior development, and their importance is reflected in the creation of an atmosphere for group work. In this paper, I aim to examine the development and importance of social interactions in the context of children's project work. Therefore, the subject of this paper is a presentation and analysis of the professional literature that regulates the issue of promoting social interactions in the context of children's project work. The aim of the paper is to analyze relevant literature and identify potential ways of encouraging social interactions of children during project work, as well as to emphasize the importance of adequately established social relationships. The pedagogical implications that can be significant for contemporary practice are oriented towards deepening collaboration between educators and specialists, particularly pedagogists, with the aim of designing strategies for professional development in the context of uninterrupted children’s participation in projects. This would subtly support the development of social interactions among preschoolers. The contribution of the conducted analysis of the relevant papers lies in the fact that it can serve as a starting point for exploring this phenomenon from various aspects, using a mixed-method approach.
Informaciono-komunikacione tehnologije u aktivnostima upoznavanja okoline
Authors: Botić Mladen
Published: October 2023

The paper investigates the use of ICTs in preschool children’s activities of getting to know the surroundings which are based on project learning in different life situations. It enables preschool teachers to start the discussion, using the combination of speech, photos, as well as e-material, to introduce children to a new topic, to provide children with explanations and to influence the development of children’s digital literacy. The aim of the present paper is to identify the use of ICTs in preschools. The general assumption is that these technologies greatly contribute to the efficiency of the implementation of getting-to-know-the-surroundings activities. The specific assumptions refer to preschools being differently equipped with ICTs; ICTs are used differently by different preschool teachers in these activities or some of their stages; the preschool teachers’ evaluations are not significantly influenced by their work experience and academic degree levels.To confirm this, the research was conducted in March 2023, on the sample of 104 preschools teachers in Zlatibor region. The data collected by Scaler – IKT-AUO ( = .856) and processed by means of descriptive statistics confirmed all the hypotheses of the research. Based on the obtained results, the paper provides a number of pedagogical implications which suggest the need for preschool teachers’ professional development aimed at improving their digital competencies for using ICTs in preschool education.
ANALISIS PERBANDINGAN PERFORMA VIRTUALISASI SERVER MENGGUNAKAN VMWARE ESXI, ORACLE VIRTUAL BOX, VMWARE WORKSTATION 16 DAN PROXMOX
Authors:   Universitas Muhammadiyah Ponorogo, Nuryadin Ridho Akbar , Ramadhani Tarisa A. , Karaman Jamilah , Reza Muhammad
Published: October 2023

In the era of advancing digitization, server infrastructure plays a key role in the development of applications and web services. To effectively and efficiently manage and develop virtualized servers, server virtualization techniques can be employed. There are several virtualization platforms available, such as VMware Workstation 16, VMware vSphere (ESXi), Oracle VirtualBox, and Proxmox, each with their own strengths and weaknesses. The objective of this research is to analyze the performance of these four virtualization platforms in developing and managing virtualized servers used for web services, taking into consideration response time, throughput, CPU performance, storage performance, and RAM performance. Experimental methods were used to test these four platforms and measure CPU performance, RAM performance, disk performance, throughput, and response time using Moodle benchmark. The data was then analyzed to draw conclusions about the performance of each platform. The research results show that VMware vSphere ESXi and Proxmox have better CPU performance and response time when handling multiple virtual machines, and are more efficient in disk and memory usage compared to VMware Workstation 16 and Oracle VirtualBox. Significant differences in data transfer speed were found among the four platforms. Overall, VMware vSphere ESXi and Proxmox can be considered better choices for running web servers.
IMPLEMENTASI API RESTFUL DENGAN JSON WEB TOKEN (JWT) PADA APLIKASI E-COMMERCE THRIFTY SHOP UNTUK OTENTIKASI DAN OTORISASI PENGGUNA
Authors:   Universitas Muhammadiyah Ponorogo, Nashikhuddin Ahmad Yahya , Karaman Jamilah , Litanianda Yovi
Published: October 2023

User authentication and authorization play a vital role in securing sensitive data within applications. E-commerce applications, in particular, require robust authentication and authorization methods to safeguard the confidentiality and integrity of exchanged data. JSON Web Token (JWT) has emerged as a popular authentication mechanism for securing data transmission over networks. This paper explores the implementation of JWT in a RESTful API to achieve user authentication and authorization in an E-commerce application. The objective of this study is to analyze the implementation of JWT in a RESTful API for user authentication and authorization within an E-commerce context. The detailed implementation of JWT in the Thrifty Shop application is discussed, encompassing its utilization for user authentication and authorization. Additionally, the benefits derived from employing JWT in the Thrifty Shop E-commerce application are explored. In conclusion, the implementation of JSON Web Token (JWT) in a RESTful API proves to be an effective approach for user authentication and authorization in E-commerce applications. The use of JWT ensures that only authenticated users gain access to sensitive data, thus enhancing the security of the Thrifty Shop E-commerce application. This implementation can serve as a model for other E-commerce applications seeking to bolster their security measures.
PENERAPAN CROSS SELLING UNTUK MENINGKATKAN PENJUALAN PADA KLINIK KECANTIKAN DENGAN MENGGUNAKAN ALGORITMA APRIORI
Authors:   Sekolah Tinggi Manajemen Informatika dan Komputer (STMIK) Widya Pratama, Syaifudin Anas , Risqiati Risqiati , Sugianti Devi , Darmawan Arief Soma
Published: October 2023

The impact of the COVID-19 pandemic has been felt by all sectors, including the economic sector. UMKM have really felt the impact after the covid 19 pandemic with declining sales turnover..This study aims to classify products from UMKM that are not selling well and selling well. The K mens method was chosen for grouping because it is simple and the K means method can group according to the same criteria grouped into a data cluster, for different data entered into another cluster. There are 28 data sets which will be grouped into 2 clusters . With the criteria of total goods sold, total transactions, difference in days and final stock. The data was taken from January 2022 to August 2022. After clustering, it was found that C1 had 12 products that were selling well, and for C2 there were 16 products that were not selling well. Therefore, UMKM can carry out sales promotion strategies that are fast and precise so that products that are not selling well can increase sales volume. Promotions can be carried out in the form of discounted promotions, mailer promotions, and fractional promotions