Cycle Analysis Research Articles

Cycle analysis and environmental assessments of cascade organic rankine cycle on diesel engine ships

This study investigates the application of organic Rankine cycle (ORC) on ships to reduce fuel oil consumption and assess improvements in the Energy Efficiency Existing Ship Index (EEXI), and carbon intensity indicator (CII). A cascade ORC(C-ORC) configuration is designed to utilize the exhaust gas from a diesel engine.Thermodynamic simulation identified a combination of toluene and R1233zd as the optimal working fluids for the C-ORC. Exergy analysis was conducted to evaluate the performance difference between the C-ORC system and a version with an internal heat exchanger (C-IHX ORC). The results showed a maximum exergy efficiency of 56.78 % for the C-IHX ORC, compared to 49.33 % for the C-ORC. Further evaluations of the C-IHX ORC, including fuel savings, energy generation, EEXI, and CII, demonstrated that average vessel fuel consumption decreased by 1.02 %, and average attained EEXI improved by 0.93 %. Additionally, the attained CII value was enhanced by 0.98 % on average, depending on operating loads and traveled distances. Although the improvements of EEXI, and CII offered were modest, they present the potential for further enhancement through the utilization of additional waste heat sources, such as economizer steam, and jacket cooling water.

Chitosan-based gel polymer electrolytes for high performance Li-ion battery

This study explores the use of glutaraldehyde-crosslinked chitosan-based gel polymer electrolytes (GPEs) in lithium-ion batteries (LIBs). GPEs are prepared by solution casting using two different molecular weights of chitosan including 150 kDa as medium and 400 kDa as high molecular weight (MMWCS and HMWCS, respectively) with varying amounts of crosslinker. Degree of crystallinity was 25.9 and 24.1 % for HMWCS and MMWCS, respectively that was decreased to 18.3 and 22.7 % by using 5 % crosslinker and 17.8 and 21.1 % by using 10 % crosslinker, and 17.2 and 17.6 % by using 20 % crosslinker. The obtained ionic conductivity for HMWCS and MMWCS was 3.1 × 10−3 and 2.9 × 10−3 S.cm−1. After crosslinking by 5, 10, and 20 % crosslinker, the ionic conductivity was obtained to 0.9 × 10−3 and 0.3 × 10−3 S.cm−1, 6.3 × 10−3 and 5 × 10−3 S.cm−1, and 1.1 × 10−3 and 0.5 × 10−3 S.cm−1 for high and medium molecular weight, respectively. Lithium-ion transfer number was obtained between 0.34 and 0.83 and the highest t+ value was obtained for the MMWCS-GA10. Electrochemical stability window of the prepared polymer electrolytes was >5 V and samples showed no remarkable dendrite growth after cycling analyses. The symmetric cells demonstrated reliable performance, operating for over 300 h without any short-circuiting, which indicates excellent reversible cycling stability for chitosan-based lithium-ion batteries. Furthermore, the Gr/GPE cell exhibited very low voltage polarization, with the over-potential decreasing from 10 mV initially to 6 mV after 300 h at the same current density. Discharge capacity was obtained higher than 170 mAh/g at 0.2C with CE = 97 % for both HMWCS-GA20 and HMWCS-GA20.

Sustainable Concrete Technology in the Field of Transmission Infrastructure: A Review

The increasing demand for energy and the imperative shift towards sustainable infrastructure have propelled research efforts towards developing eco - friendly materials for critical applications such as power transmission projects. This abstract provides a comprehensive overview of the current state of sustainable concrete technologies tailored specifically for power transmission infrastructure. The study delves into the environmental impact of conventional concrete used in such projects and explores innovative approaches to enhance sustainability. The review encompasses various aspects, including the incorporation of alternative binders such as fly ash, slag, and silica fumes, as well as the optimization of mix designs to reduce carbon footprint. Special attention is given to the performance, durability, and long - term resilience of sustainable concrete in comparison to traditional counterparts. Moreover, the document discusses the economic feasibility of implementing sustainable concrete in power transmission projects, considering factors such as material cost, construction practices, and life - cycle analysis. The abstract concludes with insights into ongoing research trends and potential future developments in sustainable concrete technologies, emphasizing the need for collaborative efforts between academia, industry, and policymakers to promote environmentally conscious practices in the realm of power transmission infrastructure, taking into account desired power transmission best performance.

Penerapan Model Pembelajaran Kooperatif Tipe Two Stay Two Stray untuk Meningkatkan Hasil Belajar Matematika Siswa Kelas XI

The aim of this research is to determine the improvement in mathematics learning outcomes of class This type of research is PTK which is carried out in two cycles. The subjects in this research were 31 students in class XI MIPA at R.A Kartini Private High School, Tebing Tinggi City. The instruments in this research consisted of tests and observation sheets. The results of data analysis in cycle I obtained an average class percentage of 74.51% and experienced an increase in cycle II, namely obtaining an average class percentage of 85.80%. And the results of the classical completeness analysis in cycle I got a percentage of 70.97%, namely there were 22 students who had reached the KKM, then classical completeness in cycle II got a percentage of 87.09%, namely there were 27 students who had reached the KKM. From this data, it can be seen that there was an increase in diagnostic tests, cycle I tests, and cycle II tests. The observation results indicate that the learning process using the Two Stay Two Stray type cooperative learning model is classified in the good category with a score of 3.31. Based on these data, the indicators for this research have been fulfilled. It was concluded that the application of the Two Stay Two Stray type cooperative learning model could improve the mathematics learning outcomes of class XI MIPA students at R.A Kartini Private High School, Tebing Tinggi City.

QSOX1 Modulates Glioblastoma Cell Proliferation and Migration In Vitro and Invasion In Vivo.

Background: Quiescin Sulfhydryl Oxidase 1 (QSOX1) is an enzyme that catalyzes the oxidation of free thiols to generate disulfide bonds in a variety of proteins, including the cell surface and extracellular matrix. QSOX1 has been reported to be upregulated in a number of cancers, and the overexpression of QSOX1 has been correlated with aggressive cancers and poor patient prognosis. Glioblastoma (GBM) brain cancer has been practically impossible to treat effectively, with cells that rapidly invade normal brain tissue and escape surgery and other treatment. Thus, there is a crucial need to understand the multiple mechanisms that facilitate GBM cell invasion and to determine if QSOX1 is involved. Methods and Results: Here, we investigated the function of QSOX1 in human glioblastoma cells using two cell lines derived from T98G cells, whose proliferation, motility, and invasiveness has been shown by us to be dependent on disulfide bond-containing adhesion and receptor proteins, such as L1CAM and the FGFR. We lentivirally introduced shRNA to attenuate the QSOX1 protein expression in one cell line, and a Western blot analysis confirmed the decreased QSOX1 expression. A DNA content/cell cycle analysis using flow cytometry revealed 27% fewer knockdown cells in the S-phase of the cell cycle, indicating a reduced proliferation. A cell motility analysis utilizing our highly quantitative SuperScratch time-lapse microscopy assay revealed that knockdown cells migrated more slowly, with a 45% decrease in migration velocity. Motility was partly rescued by the co-culture of knockdown cells with control cells, indicating a paracrine effect. Surprisingly, knockdown cells exhibited increased motility when assayed using a Transwell migration assay. Our novel chick embryo orthotopic xenograft model was used to assess the in vivo invasiveness of knockdown vs. control cells, and tumors developed from both cell types. However, fewer invasive knockdown cells were observed after about a week. Conclusions: Our results indicate that an experimental reduction in QSOX1 expression in GBM cells leads to decreased cell proliferation, altered in vitro migration, and decreased in vivo invasion.

“Sunlight-driven catalytic degradation of MB dye and multi-cycle Re-usability analysis of Cu2-xSe nanoparticles”

One of the best ways to remove organic dyes based contaminant from water resources and industrial waste water is the sunlight driven photo-catalytic degradation method. The theme of the present investigation is the photocatalytic degradation of methylene blue (MB) dye using economically produced Cu2-XSe nanoparticles (NPs) catalyst under solar radiations. The Cu2-XSe NPs crystallized in the cubic structural phase with an average crystallite size around 19 nm. The direct band gap was found to be 2.1 eV. The PL spectra and corresponding CIE diagram show the Cu2-xSe NPs emitted yellow color. The SEM micrographs show that the small grains staked over others to form large grains or patches. The FTIR and EDX spectra confirmed the formation of Cu2-XSe NPs. The obtained optimum photocatalytic degradation efficiency for Cu2-XSe NPs is 90.3 %. For first cycle analysis. The pseudo-first order and second order models were used to analyze the kinetic data of Cu2-XSe NPs for varying concentrations. The multiple-cycle degradation analysis by catalyst of MB dye in one day spam for continuous four cycles were also analysed and discussed. The sun light driven multi-cycle catalytic degradation confirms the re-usability of Cu2-xSe NPs for the treatment of industrial waste water and other contaminated water bodies for the survival of aquatic life and for saving environment.

Media Pembelajaran Kongkrit Dalam Meningkatkan Motivasi Belajar IPA Siswa Kelas V SD YPK Sarawandori

This study aims to determine the increase in science learning motivation through concrete learning media in fourth grade students of YPK Sarawandori Elementary School. This research is a classroom action research. The subjects of this study were fourth grade students with a total of 12 students. While the object of this research is students' science learning motivation after participating in learning by implementing concrete learning media. The data collection method used to collect data on students' science learning motivation is the questionnaire method. The data analysis technique used in this classroom action research is a quantitative descriptive analysis technique. The results of the study are evidenced by an increase in science learning motivation from the results of the questionnaire analysis in cycle I showing an average value of 67.5 with a percentage of completeness of 58%, increasing in cycle II with an average value of 88 and a percentage of completeness of 100%. Thus, these results indicate that concrete learning media can increase science learning motivation in fourth grade students of YPK Sarawandori Elementary School.

Acetylation of PGK1 at lysine 323 promotes glycolysis, cell proliferation, and metastasis in luminal A breast cancer cells

BackgroundIn prior research employing iTRAQ (Isobaric Tags for Relative and Absolute Quantitation) technology, we identified a range of proteins in breast cancer tissues exhibiting high levels of acetylation. Despite this advancement, the specific functions and implications of these acetylated proteins in the context of cancer biology have yet to be elucidated. This study aims to systematically investigate the functional roles of these acetylated proteins with the objective of identifying potential therapeutic targets within breast cancer pathophysiology.MethodsAcetylated targets were identified through bioinformatics, with their expression and acetylation subsequently confirmed. Proteomic analysis and validation studies identified potential acetyltransferases and deacetylases. We evaluated metabolic functions via assays for catalytic activity, glucose consumption, ATP levels, and lactate production. Cell proliferation and metastasis were assessed through viability, cycle analysis, clonogenic assays, PCNA uptake, wound healing, Transwell assays, and MMP/EMT marker detection.ResultsAcetylated proteins in breast cancer were primarily involved in metabolism, significantly impacting glycolysis and the tricarboxylic acid cycle. Notably, PGK1 showed the highest acetylation at lysine 323 and exhibited increased expression and acetylation across breast cancer tissues, particularly in T47D and MCF-7 cells. Notably, 18 varieties acetyltransferases or deacetylases were identified in T47D cells, among which p300 and Sirtuin3 were validated for their interaction with PGK1. Acetylation at 323 K enhanced PGK1's metabolic role by boosting its activity, glucose uptake, ATP production, and lactate output. This modification also promoted cell proliferation, as evidenced by increased viability, S phase ratio, clonality, and PCNA levels. Furthermore, PGK1-323 K acetylation facilitated metastasis, improving wound healing, cell invasion, and upregulating MMP2, MMP9, N-cadherin, and Vimentin while downregulating E-cadherin.ConclusionPGK1-323 K acetylation was significantly elevated in T47D and MCF-7 luminal A breast cancer cells and this acetylation could be regulated by p300 and Sirtuin3. PGK1-323 K acetylation promoted cell glycolysis, proliferation, and metastasis, highlighting novel epigenetic targets for breast cancer therapy.

Peningkatan Hasil Belajar Siswa melalui Model Kooperatif Tipe TGT dalam Pembelajaran Matematika di Kelas XI

Purpose – Several phenomena have been observed, including a notable lack of active student engagement, which has led to poor learning outcomes. Consequently, this research aims to investigate the enhancement of student learning outcomes through the implementation of the TGT (Teams-Games-Tournaments) cooperative learning model in eleventh-grade mathematics education.Method – The research method employed is Classroom Action Research (CAR), which comprises two cycles, each encompassing four stages: planning, action, observation, and reflection. The research instrument consists of test questions designed in accordance with the learning objectives. The success indicator for this research is that 75% of the students achieve learning mastery.Findings – The integration of the TGT (Teams-Games-Tournaments) cooperative learning model can improve student learning outcomes. Based on the research results and data analysis in cycle 1, the percentage of students achieving learning completeness was 42%. Since this did not meet the success indicators, the research continued into cycle 2, where an increase of 36% was observed. The percentage of students achieving learning completeness in cycle 2 was 78%, thereby meeting the success indicators, and thus, the research concluded at cycle 2. Research Implications – The implications of this research highlight the importance of selecting a learning model that promotes active student participation in the learning process to enhance students' learning outcomes in vector material. However, a limitation of this research is the restricted sample size, as it focuses solely on one school.

Total blastocyst usable rate is a predictor of cumulative live birth rate in IVF cycles

PurposeDespite advances in IVF techniques, determining the prognostic factors influencing cumulative live birth rate (CLBR) remains crucial for optimizing outcomes. Among the various key performance indicators in the lab, blastulation rate, and more specifically Total Blastocyst Usable Rate (TBUR), has gained particular interest. In this study we aimed at determining if TBUR was significantly associated with CLBR. Basic proceduresThis monocentric retrospective case-control study was conducted in 317 consecutive IVF/ICSI cycles in 2014–2020 and leading to the formation of 3 usable blastocysts, including freeze all cycles. TBUR (usable blastocysts / 2PNs) was calculated and CLBR after 2-year follow up was recorded, including both fresh and frozen embyro transfers. CLBR was then compared between 2 groups according to TBUR (group 1: TBUR ≥50 % vs group 2: TBUR ≤30 %). Main findingsCLBR was significantly higher in group 1 than in group 2 (57 vs. 41 %, p = 0.02). Adjusted logistic regression showed a statistically significant relationship between CLBR and TBUR, with a significantly lower chance of achieving a live birth in group 2 than in group 1 (OR = 0.408 [0.17–0.96]; p = 0.04). Principal conclusionsAlthough the monocentric design and the arbitrary choice of thresholds for TBUR and number of blastocysts call for caution when generalizing the findings and advocates for external validation, our results illustrate that TBUR is a valuable prognostic factor of CLBR in IVF cycles which might serve as a tool for lab monitoring, cycle analysis by medical staff and patients’ counselling. These results fit well within the P4 medicine concept (Predictive, Preventive, Personalized, and Participatory), and advocate for further research in order to improve embryo culture conditions.

Design study of a disruptive self-powered power plant prototype

This research work discusses a preliminary disruptive prototype design of a self-powered thermal power plant doing work by strictly isothermal closed processes using forced convection heat transfer both for adding and extracting heat. It includes useful work by expansion and vacuum-based contraction due to adding heat to and extracting heat from a working fluid. A cycle analysis considering useful work due to vacuum-based contraction is the core of the problem-solving methodology. The findings will be applied to the prototyping implementation task, which includes the cascade and series of cascade coupling of several regenerative power units. The empirical results of the case studies provide the data needed to carry out a prototyping task considering the results of real cases subjected to realistic irreversibilities and heat recovery factors that make the self-feeding power plant an interesting design option. This extraordinary result confirms the technical viability of real machines that exhibit the ability to provide more energy than they use, that is, second-class perpetual motion machines

A Study of Cycle Analysis and Turbine Design for Obtaining Small-Scaled Power from the Organic Rankine Cycle Using R245fa

The organic Rankine cycle (ORC) has been widely applied to convert the renewable energy to the electric power. Some previous studies focused to find what kind of refrigerant would be a best working fluid for the ORC. In this study, R245fa was chosen as the working fluid, and the cycle analysis was conducted when the small scaled output power less than 30kW was required. In addition, properties of the working fluid on the cycle were predicted when the turbine output power was controlled by the mass flowrate. The configuration of the turbine was the radial-type turbine and the supersonic nozzles were applied as stator. So, the turbine was operated in partial admission. The turbine efficiency as well as the optimum velocity ratio was considered in the cycle analysis with the low partial admission rate. The computed results show that the partial admission rate was more important factor on the system efficiency than the temperature at the evaporator.

NOAA's National Water Model: Advancing operational hydrology through continental‐scale modeling

AbstractThe National Weather Service (NWS) Office of Water Prediction (OWP), in conjunction with the National Center for Atmospheric Research and the NWS National Centers for Environmental Prediction (NCEP) implemented version 2.1 of the National Water Model (NWM) into operations in April of 2021. As with the initial version implemented in 2016, NWM v2.1 is an hourly cycling analysis and forecast system that provides streamflow guidance for millions of river reaches and other hydrologic information on high‐resolution grids. The NWM provides complementary hydrologic guidance at current NWS river forecast locations and significantly expands guidance coverage and water budget information in underserved locations. It produces a full range of hydrologic fields, which can be leveraged by a broad cross section of stakeholders ranging from the emergency responder and water resource communities, to transportation, energy, recreation and agriculture interests, to other water‐oriented applications in the government, academic and private sectors. Version 2.1 of the NWM represents the fifth major version upgrade and more than doubles simulation skill with respect to hourly streamflow correlation, Nash Sutcliffe Efficiency, and bias reduction, over its original inception in 2016. This paper will discuss the driving factors underpinning the creation of the NWM, provide a brief overview of the model configuration and performance, and discuss future efforts to improve NWM components and services.

Nafion-Based Quasi-Solid-State Polymer Electrolyte for Lithium-Sulfur Batteries

Lithium-sulfur batteries are considered a strong contender for next-generation high-energy battery systems given their high gravimetric energy density. However, this battery chemistry is still facing challenges such as the polysulfide shuttle effect caused by the high solubility of long-chain lithium polysulfides (Li2Sn) resulting in active material loss and compromised cycle life. Solid-state polymer electrolytes (SPEs) represent a promising pathway to address this issue by preventing the formation and transport of these undesirable polysulfide intermediates.1,2 Moreover, the application of flexible polymer electrolytes promotes safe high energy batteries for smart textiles.In this study, single lithium-ion conducting solid polymer electrolytes (SLIC-SPEs) based on lithiated Nafion membrane have been investigated, utilizing the chemical and thermal stability of this kind of ionomers. Among others, a mixture of ethylene carbonate (EC) and propylene carbonate (PC) was tested as organic aprotic swelling solvent offering advantageous characteristics such as great chemical stability and high ion mobility while avoiding phase separation issues and undesired leaching.Sulfur-infiltrated ultramicroporous carbon composite cathodes were utilized in combination with the investigated SLIC-SPEs, facilitating a quasi-solid-state lithium-sulfur full cell with carbonate-solvent compatibility and high active material utilization.3 Electrochemical performance of the full cell was investigated elaborately and compared with a reference system using solely the liquid EC:PC solvent. While rapid capacity fading can be observed for the liquid electrolyte cell, an enduring high capacity is found in the lithiated-Nafion system. For better understanding of these effects, cycling analysis was accompanied by implementing impedance spectroscopy upon galvanostatic cycling. The electrochemical characterization indicates the formation of a stable film and high degree of reversibility during cycling of the lithiated-Nafion cell whereas an increased film resistance due to sulfur cross-over and electrolyte decomposition was observed within the liquid electrolyte system.(1) Z. Li, W. Lu, N. Zhang, Q. Pan, Y. Chen, G. Xu, D. Zeng, Y. Zhang, W. Cai, M. Yang, J. Mater. Chem. A 2018, 6 (29), 14330-14338.(2) X. Hao, H. Wenren, X. Wang, X. Xia, J. Tu, J. Colloid Interface sci. 2020, 558, 145-154,(3) M. Nojabaee, B. Sievert, M. Schwan, J. Schettler, F. Warth, N. Wagner, B. Milow, K. A. Friedrich, J. Mater. Chem. A 2021, 9 (10), 6508-6519,

By cyclists, for cyclists: Road grade and elevation estimation from crowd-sourced fitness application data.

Road grade or slope is a key factor for walking and cycling behavior and outcomes (influencing route, speed, energy, etc.). For this reason, the scarcity of precise road grade data presents a challenge for travel information and analysis. This paper examines the accuracy of using crowd-sourced GPS data from a fitness application to estimate roadway grade profiles, which can then be used to develop network-wide road grade datasets. We externally validate an elevation estimation method described by McKenzie and Janowicz using field surveying data, and then propose and evaluate modifications for estimation of road grade (which is more directly relevant than elevation for walking and cycling analysis). We find that a modest amount of crowd-sourced GPS data can be used to generate relatively accurate road grade estimates: better than commonly-used low-resolution elevation models, but not as accurate as high-resolution data derived from LiDAR (Light Detection and Ranging). We also find that the grade estimates are more reliable than the elevation estimates, relative to alternative data sources. The most accurate method to aggregate crowd-sourced GPS data builds a composite roadway grade profile using partition-around-medoid clustering of individual grade sequences, first smoothed with a Savitzky-Golay filter and cleaned with Density-Based Spatial Clustering of Applications with Noise (DBSCAN). Implementing this method with an average of 150 GPS traces per location yields a root mean square error (RMSE) of 1% road grade. The findings in this paper can be used to incorporate precise road grade information into street network datasets over a wide spatial scale, which is necessary for walking and cycling analysis that fully considers the physiological aspects of active transportation.

Penerapan Model Teams Games Tournament (TGT) Untuk Meningkatkan Hasil Belajar Pembelajaran Tematik Terpadu Siswa Kelas III A UPTD SDN 66 Kanjitongan

Based on observation results, student learning outcomes are still low. This research aims to improve student learning outcomes in Integrated Thematic Learning using the Teams Games Tournament (TGT) learning model. This research was carried out at UPTD SDN 66 Kanjitongan, Kanjitongan Hamlet, Mattiro Tasi Village, Maros Baru District, Maros Regency. The subjects of this research were 19 students in class IIIA UPTD SDN 66 Kanjitongan for the 2023/2024 academic year. The type of research used is Classroom Action Research. Based on the research results, it can be concluded that the application of the Teams Games Tournament (TGT) model in Integrated Thematic Learning can improve the learning outcomes of class III A UPTD students at SDN 66 Kanjitongan. This is shown by the results of the analysis in cycle I, the percentage of students who have reached the Minimum Completeness Criteria is 68.42% and the percentage of students who have not reached the Minimum Completeness Criteria is 31.58%. 2 cycles with the percentage of students who have reached the Minimum Completeness Criteria89.47% and the percentage of students who have not reached the Minimum Completeness Criteria 10.53%.

Penerapan Model Pembelajaran Berbasis Proyek untuk Meningkatkan Aktivitas dan Keterampilan Analisis Sastra

Abstract The purpose of this study was to improve literary analysis activities and skills using a project-based learning model in the Indonesian Literature study program, Faculty of Teacher Training and Education, Jambi University. The method used in this research is Classroom Action Research (PTK) which was carried out in two cycles in the Oral Literature Study course. In the first cycle, two meetings were held and the second cycle was held three meetings. Each cycle is carried out in the stages of planning, implementation, observation, and reflection. The data were analyzed in accordance with the predetermined assessment rubric. In the first cycle, the students' activity scores increased, 80% of which reached the good category score and 20% reached the very good category score compared to the activity scores obtained in the pre-cycle. As for the value of the results of literary analysis in cycle I, it has not yet reached the target, namely not exceeding 50% of students getting good and very good category scores. In cycle II, the value of activity and the results of literary analysis experienced a significant increase, namely 100% of students getting very good category scores for activity scores and 80% of students getting good scores and 20% getting very good scores for the results of literary analysis. Based on these values, it can be said that the application of the Project Based Learning learning model in the Oral Literature Study course to improve activities and oral literature analysis skills is appropriate and effective to be applied. Keywords: Activity, Skill, Literature Analysis, PjBL

Upaya Meningkatkan Kemampuan Motorik Halus Anak Dengan Kegiatan Mewarnai Gambar Melalui Metode Pemberian Tugas Pada Anak Kelompok B TK Mandiri Serai Wangi Peranap Tahun Ajaran 2022/2023

Children's fine motor skills have not shown good results, in performing fine motor movements, children also need the support of other physical skills and mental maturity. Picture coloring activities at Serai Wangi independent kindergarten are still lacking. When the activity of coloring pictures is carried out there are still many children who play with their friends rather than completing the task. The media provided by the teacher is too large causing children to get bored. The media provided by the teacher is also less varied. The time limit given by the teacher is not appropriate, so that children lack responsibility for image coloring activities. The way the teacher conveys how to color the picture is less precise. Some children still color the picture in two directions. In fact, there are still children who color pictures out of the predetermined pattern lines and are very monotonous. And there are more children who color pictures with only one color. Coloring pictures usually uses crayon media. The focus in this study was group B children of Mandiri Serai Wangi Kindergarten with a total of 10 children consisting of 6 girls and 4 boys. This study uses classroom action research with coloring pictures through the assignment method which is carried out through four stages, namely: planning, action, observation and reflection. This research was conducted in two cycles and each cycle consisted of two meetings. Based on the results of the analysis in cycle I meeting 1 children who were predicated Developing very well only 20% increased in the second meeting to 30%. In cycle II, the first meeting of children who were predicated on developing very well from 30% increased in the second meeting to 60%. The occurrence of an increase from cycle I and silkus II can be concluded that there is an increase with the activity of coloring pictures through the method of giving assignments to children in group B of Mandiri Serai Wangi Kindergarten Peranap Academic Year 2022/2023. Keywords: Fine motor skills, coloring pictures, assignment method

Quality of Management Processes as a Determinant of NGOs‘ Sustainability

Abstract The quality of management processes and performance of non-profit organizations in the region are the essential prerequisites for increasing the sustainability of social support through NGOs. The paper summarizes the results of the evaluation study based on the Plan-Do-Contoll-Act (PDCA) cycle analysis. The quality of management processes was self-evaluated on the basis of the analysis of the PDCA cycle in 79 NGOs, which took place in the 2015–2019 with the recipients of social support subsidies of the South Moravian Region administration. A composite indicator was designed to compare the overall level of management quality of participating NGOs. Results identified significant room for improvement in planning, fundraising, management of work with volunteers, and systematic use of data to improve NGOs‘ performance. Based on the understanding of the current level of the quality management processes, recommendations for enhancing the sustainability of NGOs and the efficiency of regional support are derived.

Peningkatan Pemecahan Masalah Matematis Melalui Model Pembelajaran Inkuiri Berbantuan Aplikasi Kahoot! Pada Siswa SMA Negeri 1 Pahae Julu T.A.2022/2023

This study aims to improve mathematical problem solving through the inquiry learning model assisted by the kahoot! in SMA Negeri 1 Pahae Julu students T.A.2022/2023. The subjects in this study were 34 students of SMA Negeri 1 Pahae Julu T.A.2022/2023 and the object of this study was an increase in mathematical problem solving through the inquiry learning model assisted by the kahoot! application. Before conducting the research, the researcher first gave a pre-test on 2 the initial observation, which was carried out in 1 meeting. From the results of data analysis, it was obtained that the average mathematical problem solving was 65.176 with the percentage of students who completed 52.94%. Therefore, an effort is needed to improve mathematical problem solving through an inquiry learning model assisted by the kahoot! in SMA Negeri 1 Pahae Julu students T.A.2022/2023. An effort made is called research. This type of research is classroom action research conducted in 2 cycles, each cycle consisting of 2 meetings. The results of data analysis in cycle I obtained an average of 71.941 mathematical problem solving with a percentage of students who completed 76.47% experienced an increase in cycle II obtained an average of 76.059 mathematical problem solving with the percentage of students who completed 79.41%. The class has completely solved the problem in cycle II research. Thus it can be concluded that the research objectives have been achieved, namely to improve mathematical problem solving through the inquiry learning model assisted by the kahoot! in SMA Negeri 1 Pahae Julu students T.A.2022/2023.