bluuebunny/crossref_metadata_2025 huggingface dataset:
Retrieval of NO2 profiles from three years of Pandora MAX-DOAS measurements in Toronto, Canada
Authors: Alwarda Ramina , Bognar Kristof , Zhao Xiaoyi , Fioletov Vitali , Davies Jonathan , Lee Sum Chi , Griffin Debora , Lupu Alexandru , Frieß Udo , Cede Alexander , Su Yushan , Strong Kimberly
Published: December 2024

Abstract. The purpose of this work is to derive new NO2 vertical profiling data products from Pandora spectrometers and investigate the factors contributing to the bias of this dataset relative to established ground-based and spaceborne datasets. Possible applications of the NO2 vertical profile dataset include air quality monitoring and satellite validation studies. We explore the application of the optimal estimation method to Pandora multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements to retrieve vertical profile information for nitrogen dioxide (NO2). We use the Heidelberg Profile (HeiPro) retrieval algorithm to derive, for the first time, NO2 profiles and partial columns (0–4 km) from Pandora MAX-DOAS measurements from 2018–2020 at Downsview, a suburban neighbourhood in the north end of Toronto, Canada that is subject to local traffic emissions and urban influences. Validation of the new dataset was done via comparison with official Pandora direct-Sun measurements, in situ observations, satellite data, and an air quality forecasting model. We find that, for tropospheric partial column comparisons, the HeiPro dataset has a positive mean relative bias to Pandora direct-Sun (61 % ± 9.7 %) and TROPOMI (41 % ± 47 %) observations, as well as the GEM-MACH model output (61 % ± 7.5 %), with similar seasonal and diurnal cycles in the bias with Pandora direct-Sun and GEM-MACH. Contributing factors to the large bias of HeiPro to Pandora direct-Sun were investigated, and NO2 heterogeneity, combined with differences between direct-Sun and multi-axis viewing geometries, was found to contribute a maximum of 52 % of the total relative bias during morning measurement times. For surface NO2 comparisons, we find that HeiPro measurements capture the magnitude and diurnal variability of surface NO2 reasonably well (mean relative bias to in situ surface NO2: −8.9 % ± 7.6 %) but are low-biased compared to GEM-MACH (mean relative bias: −36 % ± 2.4 %). Compared to HeiPro, the GEM-MACH model profiles are high-biased in the lower boundary layer and low-biased in the free troposphere.
Medium-scale gravity waves observational methodology for antarctic airglow observations
Authors: Giongo Gabriel Augusto , Wrasse Cristiano Max , Pautet Pierre-Dominique , Bageston José Valentin , Nyassor Prosper Kwamla , Figueiredo Cosme Alexandre Oliveira Barros , Bilibio Anderson Vestena , Gobbi Delano , Takahashi Hisao
Published: December 2024

Abstract. Medium-scale gravity waves are atmospheric waves with a horizontal scale of 50 to 1000 km. They can be observed via airglow all-sky images through the keogram technique. Our research introduces a novel algorithm that automatically identifies these waves, visible in airglow keograms, to study gravity waves over the Antarctic Peninsula. The all-sky airglow imager was installed at the Brazilian Comandante Ferraz Antarctic Station (EACF, 62° S), near the tip of the Antarctic Peninsula. The preprocessing techniques, including projection into geographical coordinates, flat fielding, consecutive image subtraction, and Butterworth filter, were used to enhance the visibility of the medium-scale waves. Based on the wavelet transform, the analysis procedure is used to identify the primary oscillation present in the keograms and reconstruct them posteriorly to check the wave coherency and obtain the wave parameters by fitting the phase lines in the phase domain. The fitting parameters then estimate wave parameters and the estimation quality. Simulations with synthetic images containing typical traveling waves were used to assess the error generated through the procedure and determine the fitting parameters threshold. This procedure was used to process a year of data in less than one hour, identifying most waves with errors below 5 percent. Waves observed parameters range close to the expected results, although they differ from other observation sites by having larger phase speeds and wavelengths.
Polar winter climate change: strong local effects from sea ice loss, widespread consequences from warming seas
Authors: Naakka Tuomas , Köhler Daniel , Nordling Kalle , Räisänen Petri , Lund Marianne Tronstad , Makkonen Risto , Merikanto Joonas , Samset Bjørn H. , Sinclair Victoria A. , Thomas Jennie L. , Ekman Annica L. M.
Published: December 2024

Abstract. Decreasing sea ice cover and warming sea surface temperatures (SSTs) impact polar climate in uncertain ways. We aim to reduce the uncertainty by comparing output from four 41-year simulations with four Atmospheric General Circulation Models (AGCMs). In our baseline simulations, the models use identical prescribed SSTs and sea ice cover conditions representative of 1950–1969. In three sensitivity experiments, the SSTs and sea ice cover are individually and simultaneously changed to conditions representative of 2080–2099 in a strong warming scenario. Overall, the models agree that warmer SSTs have a widespread impact on 2 m temperature and precipitation while decreasing sea ice cover mainly causes a local response (i.e. largest effect where the sea ice perturbation occurs). Thus, decreasing sea ice cover causes a larger change in precipitation and temperature than warmer SSTs in areas where sea ice cover is reduced while warmer SSTs dominate the response elsewhere. In general, the response in temperature and precipitation to simultaneous changes in SSTs and sea ice cover is approximately equal to the sum due to individual changes, except in areas of sea ice decrease where the joint effect is smaller than the sum of the individual effects. The models agree less well on the magnitude and spatial distribution of the response in mean sea level pressure, i.e. uncertainties associated with atmospheric circulation responses are larger than uncertainties associated with thermodynamic responses. Furthermore, the circulation response to decreasing sea ice cover is sometimes significantly enhanced but sometimes counteracted by the response to warmer SSTs.
Li diffusion in plagioclase crystals and glasses – implications for timescales of geological processes
Authors: Pohl Florian , Behrens Harald , Oeser Martin , Marxer Felix , Dohmen Ralf
Published: December 2024

Abstract. The growing interest in Li diffusion as a tool to determine timescales of short-time magmatic events, such as magma ascent during eruption, increases the necessity to better understand Li diffusion in common mineral phases. In this context, well-constrained diffusion coefficients and understanding of kinetic processes specific to mineral phases are of crucial importance. To gain further insight especially into the kinetic processes in plagioclase, we investigated the diffusion of Li between natural An61 plagioclase crystals and synthetic glasses of An80 plagioclase composition. Experiments were conducted at 200 MPa in rapid-heat/rapid-quench cold-seal pressure vessels (RH/RQ CSPVs) and internally heated pressure vessels (IHPVs) at temperatures between 606 and 1114 °C. Concentration and isotope profiles of Li were measured using femtosecond laser ablation multicollector inductively coupled plasma mass spectrometry (fs-LA-MC-ICP-MS). We adopted a multispecies diffusion model and specified boundary conditions for plagioclase of labradoritic composition. Using this model, we were able to distinguish between an interstitial (DLii) and a vacancy process (DLiA), with the interstitial process being 0.2–1 orders of magnitude faster than the vacancy process, depending on temperature. DLii=10-3.76±0.58exp⁡-180.0±12.0kJmol-1RTm2s-1DLiA=10-5.53±0.16exp⁡-151.7±3.2kJmol-1RTm2s-1 Our data indicate charge compensation of Li by Na in both the crystal and the glass. Chemical Li diffusion coefficients in An80 glass are up to 3 orders of magnitude slower compared to Li tracer diffusion in silicate and aluminosilicate glasses and melts, which is attributed to slow Na diffusion at high An content. Our results for chemical diffusion of Li in plagioclase crystals are 1.5–2 orders of magnitude slower than Li tracer diffusion in An- and Ab-rich plagioclase determined in previous studies. This indicates that earlier studies on natural intermediate plagioclase compositions have underestimated timescales by up to 2 orders of magnitude. For accurate determination of timescales from Li diffusion in plagioclase we suggest further exploring the role of Na and a possible dependence on An content.
Three-dimensional analytical solution of self-potential from regularly polarized bodies in a layered seafloor model
Authors: Zhang Pengfei , Cui Yi-an , Xie Jing , Guo Youjun , Liu Jianxin , Liu Jieran
Published: December 2024

Abstract. The self-potential (SP) method is a sensitive geophysical technique to locate seafloor polymetallic sulfide deposits. Reasonable SP forward modeling can provide a good foundation for the inversion and interpretation of the measured data. Based on the mirror image theory, we proposed a method to derive the three-dimensional analytical solution of the SP generated by regularly polarized bodies in layered media, which is explained in detail within the context of the models. We discussed the analytical solutions for different types of layered models, considering variations in the number of layers and the distribution of sources. A lab-based oxidation–reduction experiment was conducted to record SP data. These data are used to simulate the SP generated by seafloor massive sulfide (SMS) deposits and validate the previous analytical solution. The result shows that the measured SP data match the analytical solution well, demonstrating the correctness of the proposed method and the corresponding analytical solution. This approach is significant for achieving fast and precise forward modeling and inversion in SMS explorations.
Is It Feasible to Use a Single Remote Sensing Optical Water Index for Rapid Mapping of Water Resources?
Authors: Wang Yuqing , Ma Yijie , Gong Tingsong , Liang Xueyue , Qin Yaochen , Tian Haifeng , Pei Jie , Wang Li
Published: December 2024

Abstract. Water resources are an important component of the earth's system, and the frequent occurrence of floods and droughts in the context of current climate change makes rapid and accurate monitoring of water resources particularly important. The optical water index (OWI) is a commonly used method for extracting water areas on the basis of remote sensing images, often with a high level of automation. However, selecting the right OWI is challenging due to the variety of water types. To quantitatively evaluate the differences in the mapping potential of different OWIs for surface water, we selected 12 commonly used OWIs to conduct comparative experiments among five types of surface water based on Landsat-8 and Sentinel-2 images. The results revealed that the Normalized Difference Water Index (NDWI) was better for turbid water, the Multi-Band Water Index (MBWI) was better for shaded water, the Modified Normalized Difference Water Index (MNDWI) was better for green water, and the Automated Water Extraction Index (AWEIsh)was better for swamp water and saltwater. Sentinel-2 has a higher ability to classify water than Landsat-8. Our work provides prior experience for fast and accurate water resources mapping in case of floods or droughts.
Efektivitas Metode Buzz Group terhadap Kemampuan Berpikir Kritis Siswa dalam Pembelajaran PAI
Authors: Wahyuni Sri Fitri , Mutiarani Pionera  , Ramdhani Muhammad Tri
Published: December 2024

Metode yang digunakan dalam pengajaran Pendidikan Agama Islam (PAI) hendaknya menciptakan pemikiran kritis siswa agar berpikir secara mendalam tentang Islam. Namun pembelajaran PAI di kelas VIII SMP Negeri 6 Palangka Raya masih belum maksimal dalam membangkitkan berpikir kritis siswa karena penerapan metode konvensional. Penelitian ini bertujuan untuk menguji pengaruh metode diskusi Buzz group untuk meningkatkan berpikir kritis siswa pada PAI. Penelitian ini menggunakan metode eksperimen semu dengan desain Nonequivalent Pretest-Posttest Control Group yang melibatkan 30 siswa dari dua kelas berbeda sebagai subjeknya. Nilai siswa dari pretest dan posttest menjadi data yang dibutuhkan. Data tersebut kemudian dianalisis melalui uji Independent Sample T-test menggunakan SPPS 19. Hasil penelitian menunjukkan bahwa penerapan Buzz group berpengaruh signifikan terhadap peningkatkan berpikir kritis siswa dimana t hitung 3,632 > t tabel 1,701 dengan nilai signifikansi 0,001 <0,05. Oleh karena itu, Ha diterima. Selain itu angket respon siswa yang diperoleh memiliki nilai persentase rata-rata sebesar 71% yang menunjukkan bahwa proses pembelajaran berada pada kategori “baik”
Development Pengembangan Lembar Kerja Peserta Didik Elektronik Berbasis Heyzine Flipbook Kelas XI IPS SMA Cerdas Murni
Authors: Rahma Daniyah Rahma Daniyah , Yuni Revita
Published: December 2024

Penelitian ini bertujuan untuk mengetahui pengembangan E-LKPD menggunakan Heyzine Flipbook dalam pelajaran ekonomi pada siswa kelas XI SMA Cerdas Murni. Penelitian ini menggunakan metode penelitian berupa Research and Development, dengan teknik pengumpulan data berupa Observasi, Wawancara, Kuisioner atau Angket, Tes dan Dokumentasi. Subjek pada penelitian ini adalah seluruh peserta didik kelas XI IPS berjumlah 34 peserta didik. Hasil penelitian menunjukkan bahwa 1) pengembangan E-LKPD pada Website Heyzine Flipbook mendapatkan presentase 95% dari ahli materi dan tidak perlu untuk dilakukan revisi dan dapat dikatakan Sangat Valid. Sedangkan rincian validator ahli media pembelajaran diperoleh presentase 83% pada tahap I dan 94% pada tahap II dengan kategori “Sangat Valid” dan Hasil penilaian validator ahli praktisi pembelajaran (guru ekonomi kelas XI) diperoleh presentase 94% dengan kategori “Sangat Praktis”. 2) Hasil uji kepraktisan atas respon peserta didik diperoleh presentase 94% dengan kategori “Sangat Praktis”. 3) Hasil uji efektifitas di peroleh presentase Ulangan Harian 44,12% yang tuntas dan 55,88% yang tidak tuntas sedangkan presentase pada post test juga mendapatkan nilai 83,3% dengan kriteria “Sangat Efektif” dan berdasarkan hasil pengukurn menggunakan Uji t paired sample test menujukkan t hitung (6.142) > t tabel (1.6932) dan p < 0,000 maka HO ditolak atau rata-rata nilai ulangan harian dan post test berbeda secara nyata dan signifikan
The Impact of Running-Based and Drop Jumping Interval Interventions on Cardiorespiratory Fitness and Anaerobic Power of Collegiate Volleyball Players: A Comparative Analysis of Inter-Individual Variability in the Adaptive Responses
Authors: Zhao Xuefeng , Lu Minying
Published: December 2024

This study compared inter-individual variability in the adaptive responses of cardiorespiratory fitness, anaerobic power, and motor abilities of male volleyball players to high-intensity interval training (HIIT) prescribed as repetitive drop jumps (interval jumping) and running-based intervals (interval running). Twenty-four collegiate volleyball players were equally randomized to two training groups executing 11 minutes of interval running or interval jumping during which they ran or repeated drop-jumps for 15 seconds, alternating with 15 seconds of passive recovery. Before and after the 6-week training period, aerobic fitness, cardiac function, and anaerobic power were evaluated using a graded exercise test, impedance cardiography, and a lower-body Wingate test, respectively. Additionally, linear speed, agility, and jumping tests determined motor abilities. Both interventions significantly enhanced maximum oxygen uptake (V̇O2max), velocity associated with V̇O2max, first and second ventilatory thresholds (VT1 & VT2), maximal cardiac output (Q̇max), stroke volume (SVmax), peak and average power output, vertical jump, change of direction, and linear sprint speed. Interval jumping group demonstrated a significantly greater improvement in squat jump (p = 0.001; 95% CI: 2.51-5.42) and countermovement jump (p = 0.001; 95% CI: 2.11-4.61) compared to interval running group. Conversely, interval running group elicited a greater enhancement in sprint speed (p = 0.002; 95% CI: 2.53-5.71) than interval jumping group. Examining the individual residual in the adaptive responses revealed that interval running induced more homogenized adaptations across individuals in VT1 (p = 0.04; 95% CI: 0.03-1.33), Q̇max (p = 0.03; 95% CI: 0.04-1.64), SVmax (p = 0.04; 95% CI: 0.02-1.75), and maximal sprint speed (p = 0.01; 95% CI: 0.72-1.95) in contrast to interval jumping. However, the uniformity of adaptations in countermovement jump in response to interval jumping surpassed that of interval running (p = 0.02; 95% CI: 0.08-1.32). Although both training modalities effectively improved the mentioned variables concurrently, tailoring the HIIT intervention to the reference intensity and training modality specific for each quality may enhance measured quality.
The Collected Short Stories of Bharati Mukherjee, edited by Ruth Maxey. Temple University Press: Philadelphia, 2023, pp. 408.
Authors: Crespo Gómez Ana María
Published: December 2024

The Collected Short Stories of Bharati Mukherjee, edited by Ruth Maxey. Temple University Press: Philadelphia, 2023, pp. 408.
Pengembangan Media Pembelajaran Game Teka Teki Silang Materi Beriman Kepada Allah dan Rasul-Nya Kelas IV Di Sekolah Dasar
Authors: Oktaria Nisca , Arni Yusni , Triani Isnatun , Aulia M. Sulton , Pradida Reyhan
Published: December 2024

To increase students' interest and motivation in studying religious content, learning materials based on crossword games have been developed for grade IV elementary school which includes faith in Allah and His Messenger. From design to classroom implementation, the process of creating educational media is discussed in this article. Research findings show that the use of crossword game-based learning resources can improve students' understanding and memory of lesson material. In addition, these educational resources can support the growth of students' critical and collaborative thinking abilities.
Method of Diagnostics of Operation Modes of Individual Heat Supply Units, Allowing to Detect Pre-Emergency Situations at an Early Stage
Authors: Дворцевой Александр , Боруш Олеся , Хорева Валентина , Яковина Ирина
Published: December 2024

The use of machine learning methods to control heat supply systems is a pressing issue worldwide. The aim of the work is to develop methods for intellectualizing the operating modes of individual heat supply units (IHU) to improve their efficiency and reliability. To achieve this goal, the following tasks were solved: creating and debugging methods for diagnosing IH operating modes; using the cluster analysis method, in particular the K-means algorithm, to identify pre-emergency situations at an early stage; analyzing the relationship between outdoor air temperature data and the pressures of direct and return network water in IHU operating modes using Novosibirsk as an example. The most important results of the work include dividing the measured parameters into five clusters, each of which characterizes a certain IHS operating mode. This was confirmed by the "Elbow Method", which determined the optimal number, which made it possible to significantly improve the forecasting of emergency modes. Studies have shown that a sharp increase in outdoor temperature leads to an increase in the pressure of direct network water, which can cause accelerated wear of heating networks due to the peculiarities of weather-dependent automation regulation. Introducing additional parameters into the initial data, such as the service life of heating networks and weather conditions, can improve the accuracy of forecasts. The significance of the obtained results lies in the possibility of early detection of emergency and pre-emergency modes of IHU operation, which helps prevent accidents and reduce repair and maintenance costs.
Construction of the Automatic Control System of a Single-Screw Extruder
Authors: Zablodskiy N. , Klendiy Petro , Dudar Oksana , Shvorov Sergey
Published: December 2024

The purpose of the work is to build the rational system for regulating technological parameters of the single-screw extruder using the frequency-regulated electric drive with limited use of sensors. This goal is achieved by the way of solving the following problems: development the method for controlling the technological parameters of the extruder with a controllable electric drive; development of a structural diagram of a model for estimating the speed of rotation a rotor of the engine without the use of velocity-type transducers; development of a functional diagram of the vector frequency-regulated electric drive with an observer that is built on the basis of a voltage equation corresponding to the main magnetic flux; development of a simulation model of the system of adjustable electric drive of the extruder and carrying out simulations with using the Matlab software package in the environment of Simulink. The most significant results of the researches are: the proposed algorithm for controlling the technological parameters (dynamic viscosity and pressure) by the way of calculating of the electrical power parameters of the adjustable electric drive of the extruder without the use velocity-type transducers; the functional diagram of the vector frequency-regulated electric drive of the single-screw extruder with the observer that was built on the basis of balance of the reactive capacity provides the necessary values of the technological parameters of the extruder. Changes in dynamic viscosity and pressure in the material, provides flexible adjustment without the use of speed sensors and rational use of electricity.
Incremental Efficiency of Electricity Generation Based on Thermal Consumption at CHPPs and its Importance in Reducing Carbon Emissions
Authors: Суворов Дмитрий , Татаринова Наталья
Published: December 2024

The aim of the study is to develop a methodological approach to assessing the incremental efficiency of electricity generation at CHPPs (specific heat consumption for changing electric power of turbine) in operating modes, taking into account both energy and environmental indicators. To achieve this goal, the following tasks were solved: the methodology, based on mathematical models of cogeneration steam turbines, both integral and differential indicators of heat rate per unit of electricity generation increment, was justified; a comprehensive generalization of the calculation data on the tur-bine T-50-12.8 type was performed; a quantitative assessment of the integral electricity generation and greenhouse gas emissions parameters was made at various loads and its comparison with the corre-sponding indicators in condensation mode. The most significant results are the following: generalized dependences of the integral specific heat consumption per unit of increase in electricity generation and carbon footprint were calculated for a wide range of changes in operating conditions; boundary condi-tions were established under which obtaining these parameters by opening the sliding grid of low-pressure section turns out to be energetically and ecologically feasible; it was determined that when increasing the capacity without bypassing the delivery water, the carbon footprint increment with an increase in the capacity of cogeneration turbines by opening the sliding grid will be less than for con-densing turbines. The significance of the results obtained lies in their applicability for solving prob-lems of ensuring maximum efficiency during involving cogeneration turbines in regulating electric load schedules in different boundary conditions.
Constitutional jurisprudence in the sources of law system
Authors: Butucea Eugen , Costachi Gheorghe
Published: December 2024

The article includes a study devoted to the valence of constitutional jurisprudence as a source of law. Such important aspects as: the competences of the Constitutional Court, the role of the Court in the legislative process, the value of jurisprudence and constitutional jurisprudence as sources of law, the legal effects and the execution of the acts of the Constitutional Court are pointed out. As a result of the comparative analysis of the legal provisions regulating the competence of the Court and its jurisprudence, in which the normative character of the acts of constitutional justice is recognized, the author concludes that the Court's jurisprudence does not represent a source of law in our legal system.
Üniversite Öğrencilerinde Kitle İletişim Araçlarının Finansal Tutum ve Davranış Üzerindeki Etkisi: Kahramanmaraş Sütçü İmam Üniversitesi Ziraat Fakültesi Örneği
Authors: Aydemir Zülküf , Ertürkmen Gülferah
Published: December 2024

Bu çalışma, Kahramanmaraş Sütçü İmam Üniversitesi Ziraat Fakültesi öğrencilerinin kitle iletişim araçları ve finansal tutum ve davranışlarını incelemeyi amaçlamaktadır. Nicel araştırma deseninin benimsendiği bu çalışmada verilerin toplanmasında anket yöntemi kullanılmıştır. Çalışma kapsamında 257 öğrenciye anket uygulanmış ve elde edilen veriler analiz edilmiştir. Araştırmanın bulgularına göre, öğrencilerin büyük bir kısmı kredi kartı kullanmakta, ancak kredi kartlarının faiz oranlarını bilmemektedir. Öğrencilerin çoğunluğu sosyal medya platformlarını aktif olarak kullanmakta olup, Instagram en popüler platform olarak öne çıkmaktadır. Ekonomi haberlerine olan ilgi düşük seviyelerde kalmakta ve öğrenciler dijital medyayı geleneksel medyaya tercih etmektedir. Bu durum, medya kuruluşlarının finansal eğitim ve bilgilendirme konularında dijital platformlara uyarlanmış daha etkili programlar geliştirmesi gerektiğini göstermektedir. Ayrıca, öğrencilerin ekonomi haberlerini düzenli olarak takip etme alışkanlıklarının düşük olması, genç nesile yönelik stratejilerin yeniden gözden geçirilmesini zorunlu kılmaktadır.
Novel low PDP CMOS Double-Base Multiplier
Authors: Rahul Pal
Published: December 2024

Multipliers play a vital role on digital low power communication system. This present study introduced a new novel strategy of multiplication that can improve speed-power efficiency with a double-based number system multiplier. Designing with a Double base number system multiplier is a suitable alternation due to its two important properties redundancy & sharpness. Extensive simulations has been done to examine the competency of proposed designs under three different test conditions to test . It then compares some of the critical parameters with excising single base number system (i.e. Binary number system) & Multi-value number system (i.e. Ternary Number system). All the design optimization & evaluations performed are based on the BSIM4 device parameter of TSMC 0.18µm CMOS technology with 0.9V supply at 27oC temperature using S. Edit of Tanner EDA..
Sürtünme Kuvvetinin Çarpışma Kutularının Enerji Soğurma Özelliklerine Etkisi
Authors: Adanur Ömer , Yakupoğlu Cihan , Acar İbrahim , Varol Faruk
Published: December 2024

Son yıllarda, araç kazalarında darbe emici görevi yapan çarpışma kutularının, enerji emme kabiliyetlerinin iyileştirilmesine yönelik çalışmalar önemli ölçüde artmıştır. Bu çalışmalar, darbeden kaynaklı oluşan şok dalgalarının araç şasesine verdiği zararı, en aza indirgemeyi amaçlamaktadır. Bu çalışmada, sürtünme kuvvetinin çarpışma kutularının enerji emme kabiliyetleri üzerindeki etkisi incelenmiştir. Bu amaçla, biri normal katlanan, diğeri sürtünme direnci ile enerji emilimi sağlayan iki farklı konfigürasyon modellenmiştir. Tasarlanan modellerle çarpışma senaryosu simüle edilmiş ve temsili modellere eksenel darbe yükü uygulanmıştır. Simülasyonlar, doğrusal olmayan açık yöntem sonlu elemanlar yöntemi (FEM) kullanılarak oluşturulmuştur. Çarpışma senaryosu her iki model için aynı koşullar altında DP600 çelik sac malzeme özellikleri kullanılarak üç farklı kalınlıkta (1.2 mm, 1.4mm ve 1.5mm) analiz edilmiştir. Çarpışma simülasyonlarının sonuçları, sürtünme direncinin, çarpışma kutularının enerji emme davranışları üzerindeki etkilerini incelemek için karşılaştırılmıştır. Analiz sonuçları, sürtünme direnci ile enerji emiliminin çarpışma kutularının darbe sönümleme özelliklerine %16 oranında olumlu katkı sağladığını göstermiştir.
Analysis and Optimization of Process Parameters Affecting Form Errors and Surface Roughness in Milling of Aging-Treated AA 6063-T6 Free Form Surfaces
Authors: Çodur Yavuz , Özlü Barış , Demir Halil
Published: December 2024

This study aimed to examine the microstructure and hardness changes in AA 6063 T6 specimens that underwent an ageing procedure. The second portion involves the machining of free forms surfaces on specimens with varying microstructures and hardness. Four different tool paths, four different cutting speed (Vc), and four different feed rate (f) were employed in the machining of the surfaces. Statistical analysis were conducted to ascertain the optimal cutting parameters and their impact on the output parameters. The experimental design was designed based on the Taguchi L16 index. The form errors and surface roughness values acquired from the tests were analysed statistically using the Signal/Noise (S/N) ratio and analysis of variance (ANOVA) methods. The study found that the sample immersed in 2WQ solution had a minimum hardness value of 71.7 Hv1, whereas the sample aged for 18 hours had a maximum hardness value of 117.7 Hv1. Based on the investigation, it was determined that A4B1C4 yielded the most favourable cutting parameter in terms of form error and surface roughness. This refers to the utilisation of the TP4 tool path, a f of 0.04 mm per tooth, and a Vc of 105 m/min. Based on the data collected, the ANOVA analysis of the 18AQ sample revealed that the cutting parameters with the highest efficacy in minimising form error and surface roughness were a f of 51.18% and 59.07%, respectively. These values represent the optimum values for cutting parameters.
On Linear Quadratic Optimal Control and Algebraic Riccati Equations for Infinite-Dimensional Differential-Algebraic Equations
Authors: Opmeer Mark , Staffans Olof
Published: December 2024

We consider linear quadratic optimal control for a very general class of infinite-dimensional differential-algebraic equations (namely, the class of future-resolvable input/state/output nodes) and obtain an algebraic Riccati equation.
Utilization of the Multicultural Understanding Education Curriculum and Modules
Authors:   Society for the Study of Family Policy, Lee Yoonjung
Published: December 2024

This study aimed to enhance the utilization of the Korea Healthy Family Support Center’s standardized
multicultural education curriculum by incorporating the needs of professional instructors and analyzing the
modular curriculum to propose key topics for different target groups. Professional instructors emphasized
the importance of structuring education to help individuals recognize multiculturalism, including self-awareness.
They also stressed the need to base the entire lecture process on cultural diversity, sensitivity, and acceptance
while emphasizing content placement and examples that promote mutual relationships, coexistence in society,
and civic actions. The main target groups in the field were divided into four categories (children, adolescents,
adults, including military personnel, and employees and public officials), highlighting the necessity of guidelines
for efficient lecture planning. The common theme proposed was ‘Civic Action in a Multicultural Society,’
with key topics tailored to the characteristics, educational duration, and environment of each group.
Application of Fintech Financial Technology in the Stock Market in Vietnam
Authors: Nga Nguyen Thi Thuy
Published: December 2024

Along with the strong development of science and technology, the application of modern technology in many activities in the financial market, including the stock market, has contributed to promoting and creating new steps. a major turning point in the development and integration of these markets. The application of modern technology has created technological leaps in the financial sector around the world, bringing incredible changes in the fields of securities, banking, and investment. Currently, Fintech is playing an important role in changing the way investors participate in the stock market.The profound impact of the 4.0 Industrial Revolution is and has been taking place strongly on most industries around the world in general and Vietnam in particular, so the stock market is no exception to that trend. Developing the stock market towards integrating modern information technology applications is an inevitable trend. Recognizing the importance of information technology application in the field of securities and stock market, the State Securities Commission has gradually modernized the technology platform to improve management and supervision capacity, operating and serving the development of the market.Regarding the development of securities products and services, since 2017, a number of securities companies have researched and deployed financial technology applications to increase customers' investment experience. Up to now, Fintech has helped new investors easily access stock investment channels with many convenient trading features, low costs, saving time and effort. However, Fintech applications in stock trading in our country are not really diverse, still at a simple level such as supporting buying and selling transactions, providing transaction information for investors. The article provides comments and assessments on the current status of Fintech applications in stock trading in Vietnam and some proposals to widely deploy these applications in the stock market in the near future.
Bruce Springsteen’s “Used Cars” and The Hidden Injuries of Class
Authors: Massaro John
Published: December 2024

Richard Sennett, Jonathan Cobb, and Rabbi Michael Lerner have written about the hidden injuries of class (i.e., the spiritual and psychological harm beyond the not-so-hidden if still not adequately addressed material deprivations suffered by the US working class). These authors argue that justice, fairness, and equality will not exist in the United States until both the unhidden and hidden injuries of class are recognized and addressed. Bruce Springsteen’s “Used Cars,” from his Nebraska album, provides a cinematically lyrical presentation of these hidden injuries, which is developed in this article. Springsteen’s “Used Cars” musically complements and clarifies the concept of the hidden injuries of class, making a useful contribution to our understanding of class politics.
Mitigating the challenges of textile wastewater treatment in Saudi Arabia utilizing electrocoagulation process: Optimization of operating parameters
Authors: Saleem Muhammad
Published: December 2024

The increasing importance of treating industrial effluents for environmental and public health protection has necessitated reliable and economical treatment methods capable of meeting stringent effluent quality standards. This study aimed to evaluate the effectiveness of the electrocoagulation (EC) process using iron electrodes for treating real textile wastewater by removing total solids (TS), COD, colour, and turbidity. Various operating parameters, including treatment time, initial pH, current density, stirring speed, and inter-electrode spacing (IES), were investigated to optimize removal efficiency. The results demonstrated that the optimal conditions for maximum pollutant removal were achieved at a treatment time of 60 minutes, a current density of 6.2 mA/cm², a solution pH of 8-8.5, a stirring speed of 150 rpm, and an IES of 5 cm. Under these conditions, the removal efficiencies reached 79.2% for TS, 92.7% for COD, 88.9% for turbidity, and 98.7% for colour. The findings of this research indicate that the EC process is a simple, quick, and economically viable method for effectively removing pollutants from textile wastewater. Additionally, it is recommended that a coupled treatment unit, such as filtration or adsorption, be employed following the EC process to enhance pollutant removal. Saudi Arabia’s Vision 2030 aims to address environmental pollution from industrial wastewater, including textile wastewater, highlighting the importance of balancing industrial growth with environmental stewardship. Present study offers the first thorough analysis of textile wastewater treatment utilizing EC process in the region, enhancing understanding of effective strategies for sustainability and compliance with effluent quality standards.
Контактная кривая и предельные циклы плоских полиномиальных векторных полей
Authors: Д.С. Ушхо
Published: December 2024

Построен класс плоских полиномиальных дифференциальных систем с полиномами степени в правых частях, для которых n эллипсов, вложенных один в другой, являются контактными кривыми. Для этих систем найдены условия существования, по крайней мере, предельных циклов,окружающих «наименьший эллипс».

A class of planar polynomial differential systems with polynomials of degree in the right-hand sides for which n ellipses nested one into another are contact curves is constructed. For these systems the conditions for the existence of at least limit cycles surrounding the “smallest ellipse” are found.
PENGGALIAN POTENSI DESA MENUJU DESA WISATA AGRO BAWANG MERAH DI DESA MEKARMANIK KABUPATEN BANDUNG
Authors: Dina Dina Dina
Published: December 2024

Kelompok Tani Tricipta dan kelompok 25 Kuliah Kerja Nyata Universitas Al-Ghifari berencana mengembangkan agrowisata bawang merah di Desa mekarmanik terutama di Dusun Cikawari. Diharapkan dengan adanya wisata Agro bawang merah ini mampu meningkatkan pendapatan para petani dan masyarakat sekitar. Penelitian dilakukan pada Kelompok Tani Tricipta, di Dusun Cikawari Desa Mekarmanik Kecamatan Cimenyan Kabupaten Bandung. Metode penelitian yang digunakan adalah kualitatif dengan teknik penelitian studi kasus. Dari hasil penelitian yang telah dilakukan diketahui bahwa dengan dikembangkannya Agrowisata Bawang Merah diharapkan mampu meningkatkan pendapatan petani dan masyarakat serta mampu mengenalkan potensi pertanian Desa Mekarmanik ke khalayak umum.
UJI AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL BATANG KESUM (Polygonum minus Huds) TERHADAP BAKTERI Staphylococcus aureus
Authors: Kartikawati Endah , Hadisoebroto Ginayanti , Qurayssiah Qurayssiah
Published: December 2024

Indonesia kaya akan keanekaragaman hayati yang dapat dimanfaatkan dalam semua aspek kehidupan manusia. Salah satu tanaman yang menarik untuk diteliti sebagai obat tradisional adalah Kesum. Tanaman Kesum (Polygonum minus) merupakan salah satu tanaman endemik di wilayah Kalimantan Barat. Tanaman kesum (Polygonum minus Huds) mengandung senyawa flavonoid, saponin dan tanin yang diharapkan mampu menghambat pertumbuhan bakteri Staphylococcus aureus. Tujuan penelitian ini untuk mengetahui pengaruh ekstrak etanol batang kesum (Polygonum minus Huds) terhadap pertumbuhan bakteri Staphylococcus aureus. Metode penelitian ini adalah uji aktivitas antibakteri ekatrak etanol batang kesum (Polygonum minus Huds) menggunakan metode difusi agar sumuran dengan konsentrasi 6%, 10%, 14% dan 18% serta digunakan siprofloxacin sebagai kontrol positif dan DMSO 10% sebagai kontrol negatif. Hasil penelitian menunjukkan ekstrak etanol batang kesum (Polygonum minus Huds) memiliki potensi daya hambat tertinggi pada konsentrasi 18% dengan diameter hambat sebesar 32,56 mm, berbeda nyata dengan kontrol positif dengan diameter hambat sebesar 47,35 mm.
HUBUNGAN RASIONALITAS PENGGUNAAN OBAT ANTI INFLAMASI NON STEROID (OAINS) DENGAN DERAJAT OSTEOARTHRITIS PADA PASIEN USIA LANJUT RAWAT JALAN DI SALAH SATU RUMAH SAKIT UMUM KOTA CIMAHI
Authors: Permana Indra , Setiatjahjati Sri , Muliawati Santi
Published: December 2024

Seiring bertambahnya usia, masalah yang sering muncul pada usia lanjut yaitu timbulnya rasa nyeri pada bagian sendi yang disebut osteoarthritis. Salah satu pemberian terapi untuk osteoarthritis yaitu pemberian Obat Anti Inflamasi Non Steroid (OAINS) pada usia lanjut harus diperhatikan dengan baik sehingga dapat tercapainya tujuan terapi untuk mengurangi rasa nyeri dan meningkatkan kualitas hidup jika pemberian terapi tepat atau rasional. Tujuan penelitian ini untuk mengetahui hubungan rasionalitas penggunaan OAINS dengan derajat osteoarthritis pada pasien usia lanjut rawat jalan di salah satu Rumah Sakit Umum swasta Kota Cimahi pada Januari – Desember 2022. Jenis penelitian ini yaitu penelitian non eksperimental dengan desain deskriptif retrospektif. Hasil penelitian dari 116 pasien, rasionalitas penggunaan OAINS pada kriteria tepat indikasi, tepat pemilihan obat, tepat dosis, tepat cara pemberian, tepat interval waktu pemberian, dan tepat lama pemberian terapi pada osteoarthritis grade 1 (74,05%), osteoarthritis grade 2 (79,57%), osteoarthritis grade 3 (92,60%) dan osteoarthritis grade 4 (96,97%). Analisis hubungan rasionalitas penggunaan OAINS derajat osteoarthritis dilakukan menggunakan program SPSS versi 23 dengan uji Rank Spearman didapatkan p value 0,05 menunjukkan terdapat hubungan rasionalitas penggunaan OAINS dengan derajat osteoarthritis. Hasil analisis pada kriteria tepat indikasi (nilai korelasi = 0,497) dan tepat pemilihan obat (nilai korelasi = 0,398) memiliki korelasi positif dengan kekuatan hubungan moderat/cukup. Sedangkan pada kriteria tepat dosis (nilai korelasi = 0,147) dan tepat interval waktu pemberian obat (nilai korelasi = 0,090) memiliki korelasi positif dengan kekuatan hubungan lemah dan kurang berarti.
Mejora en el proceso de planificación de las unidades logísticas utilizando análisis predictivo en una empresa de última milla en Lima metropolitana
Authors: Jimenez Ahmad Daniel Hussen , Torres Fabiana Angelid Retamozo , Santos Figo García , García María Belén Ortiz
Published: December 2024

Esta investigación se centró en mejorar la eficiencia de la planificación de las unidades logísticas de una empresa de última milla, utilizando a Scharff, una operadora logística peruana en crecimiento exponencial. La metodología aplicada, llamada Predictive Analytics en la Cadena de Suministro, comprende tres fases: Comprensión del proceso de planificación, construcción de modelos predictivos y simulación para optimizar la capacidad de los vehículos, reducir costos y mejorar la planificación. En la primera fase, se creó un diagrama de proceso y se cuantificaron sus características para identificar el problema principal: Una baja utilización de los vehículos (26% de su capacidad), lo que generaba un desaprovechamiento de S/.236 mil mensuales. En la segunda etapa, se pronosticó la demanda con redes neuronales utilizando descenso de gradiente, logrando un RMSE de 0,21. Paralelamente, se usaron árboles de decisión para predecir datos logísticos antes de la llegada al almacén. En la última fase, se combinaron el pronóstico de demanda y el algoritmo de predicción para definir el reporte de distribución diario y calcular la cantidad de vehículos necesarios. Como resultado se logró reducir el daño emergente en 122 mil soles mensualmente al aumentar la utilización media en 54 puntos porcentuales.
LOGÍSTICA INVERSA DESDE EL CONSUMIDOR FINAL
Authors: Quispe Fátima Isabel Huayta
Published: December 2024

El presente estudio busca fomentar el reciclaje de papel en Lima Oeste, área que registra un consumo anual de 1075 toneladas. Según datos del MINAM, la tasa de recuperación de los residuos aprovechables es apenas del 1.8% para el año 2023. Trasladando la situación al reciclaje de cuadernos, esto implica que el 98.2% no se están reciclando, lo que contrasta con las prácticas más avanzadas de otros países donde se recicla hasta un 56.1%. El enfoque metodológico empleado es el ciclo PHVA. Primero se validó el problema priorizando la investigación en el comercio minorista de Lima debido a su conexión directa con el consumidor final. Seguidamente, se describió el proceso de logística inversa en la recuperación de productos defectuosos con el objetivo de recolectar al menos 4 cuadernos por familia al año. Se diseñó un sistema de acopio ágil y estratégico con puntos ubicados en el área seleccionada. Complementariamente, se está desarrollando una aplicación que permitirá implementar un programa de recompensas a los clientes por la devolución de cuadernos usados. Este proyecto generará beneficios significativos en la reducción de aproximadamente 42 toneladas de CO2 y un impacto económico de $608,000 al año.
DISEÑO DE UNA LAVANDERÍA SOSTENIBLE COMO MODELO DE NEGOCIO DE IMPACTO EN EL DESARROLLO LOCAL
Authors: Cosis Lisbet Laza , Mantilla Marcos Manuel Morales , Hernández Hiram La O
Published: December 2024

A empresa Girbau, líder no setor de soluções para lavanderia, a empresa de interface Ceta S.A, e a Universidade Tecnológica de Havana (CUJAE), colaboram em um projeto com o objetivo de criar uma lavanderia que contribua para a generalização de boas práticas, promovendo a inovação e a contribuição da ciência para o setor. O projeto Lavandaria “CUJAE” assumiu o objetivo de desenhar um modelo baseado em práticas ambientais que promova o desenvolvimento local. Para o desenvolvimento do modelo de negócios foi utilizada uma metodologia autodesenvolvida baseada no modelo Canvas. O desenho foi contrastado com a produção científica existente relacionada ao tema, demonstrando que ele responde às necessidades comprovadas dos clientes do serviço e do contexto em que é desenvolvido. O projecto tem um impacto significativo resultando numa lavandaria sustentável implementando sistemas de reciclagem de água, instalação de um sistema de painéis solares, gerando oportunidades de emprego para uma comunidade vulnerável de 1900 pessoas, capacidades para o desenvolvimento local, serviços essenciais às escolas galinholas; inclusive a própria universidade onde há matrícula de 1.200 bolsistas.
Psychologist, Eugenicist or a bit of both? Reconsidering the questionable reputation of Cyril Burt
Authors: Chamarette R. Michael
Published: December 2024

One of the most divisive psychologists of the twentieth century, unjustifiably Cyril Burt is often ignored today. There is a lack of cohesion between the ways in which Burt is interpreted by many historians, and contrastingly by psychologists themselves even when they consider him at all. The allegations of fraud made against Burt and the impact of his lifelong eugenic ideology discussed here also suggests the need for reappraisal. However, a comprehensive re-evaluation is too demanding for a single paper. Consequently, only professional, conceptual and technical aspects, rather than the wider social impact of Burt’s work are considered.

Much of his work on intelligence and its heritability was intended to provide ‘scientific’ support for eugenics and to demonstrate the implausibility of any alternative, but this was often extemporised rather than systematic. During the first decade of his work for example his axiomatic claims for the biological origins of human intelligence as an ‘instinct’, that matured or unfolded rather than developed through experience, seemed relatively coherent. However, as this faced increasingly strong challenges subsequently, Burt resorted to progressively more complex mental gymnastics, and cited questionable methods and ‘evidence’ in its support.

Regardless of whether Burt is deemed a pioneer of psychology, a fraudulent ideologue, or simply as professionally slipshod, his reputation demands reconsideration.
A history of identifying implicit motives
Authors: McCredie Hugh
Published: December 2024

This paper is a digest of the last of three series of psychological assessment histories appearing in the BPS quarterly periodical Assessment & Development Matters between Vol. 12(2020), 1, pp.34-35 and Vol. 14(2022), 4, pp. 32-37.