bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Synthesis Procedures on the Preparation of Strontium Titanate Nanoparticles and Photocatalytic application for Methylene blue degradation
Authors: Aktaş Pelin Sözen , Ay Emriye 
Published: October 2022

Abstract
SrTiO3 is a well-known photocatalyst with various applications, such as antibacterial agents, self-cleaning surfaces, and water and air conditioning. In the present study, pure SrTiO3 (ST) photocatalysts were prepared by the high-energy ball milling and Pechini method and then characterized by X-ray diffraction (XRD), thermal gravimetric analysis, FTIR, scanning and transmission electron microscopy, respectively. Structural parameters were evaluated by Rietveld refinement analysis from XRD data, which confirmed the cubic system of SrTiO3. The obtained nanoparticles were used for photocatalytic methylene blue (MB) degradation and the influence of synthesis methods on catalytic activity was investigated. The degradation rate constant of MB on the ST1 (Pechini-synthesized sample) and ST2 (high energy ball milled sample) is 0.0151 and 0.0092 min-1, respectively. The better photocatalytic activity of the ST1 demonstrated 93% degradation of dye under the solar light simulator. The photocatalytic reaction data provided well a first-order kinetic model.
Circular RNA hsa_circ_0005218 Promotes the Early Recurrence of Hepatocellular Carcinoma by Targeting the miR-31-5p/CDK1 Pathway
Authors: Wang Xiao-bo , Luo Tao , Lu Shao-long , Lu Hua-ze , Jiang Zhi-jun , Liu Xin-yu , Zhao Chang , Li Le-qun , Chen Jie 
Published: October 2022

Abstract
Increasing evidence has manifested that circular RNAs (circRNAs) exhibited critical function in regulating various signaling pathways related to hepatocellular carcinoma (HCC) recurrence. However, the role and mechanism of the circRNAs in the HCC early recurrence remain elusive. In this study, high-throughput RNA-sequencing (RNA-seq) analysis was conducted to identify the expression profile of circRNAs in HCC tissues and circ_0005218 was identified as one circRNA that significantly up-regulated in early recurrent HCC tissues. And patients with high expression of circ_0005218 showed worsen overall survival (OS) and disease-free survival (DFS). Moreover, the promotion effects of circ_0005218 on HCC cells in term of proliferation, invasion and metastasis were confirmed both in vitro and vivo by gain- and loss-of function assays. In addition, dual-luciferase reporter assays showed that circ_0005218 could competitively bind to micro-RNA (miR)-31-5p. Furthermore, we showed that suppression of CDK1 by miR-31-5p could be partially rescued by up-regulating circ_0005218. Taken together, the present study indicates that circ_0005218 absorbed miR-31-5p as a sponge to weaken its suppression on CDK1 expression, and thus boost HCC cell invasion and migration, which would act as a potential biomarker to predict the HCC early recurrence and as a new therapeutic target for treatment of HCC.
Soil organic matter, greenhouse gas emission and global warming: Following one-time high rate compost application with annual cover crop planting in a dryland winter wheat-fallow rotation
Authors: Brempong Mavis B. , Norton Urszula , Norton Jay B. 
Published: October 2022

Abstract
In dryland organic winter wheat-fallow rotation systems of U.S. Central High Plains, the usual practice of 10–15 Mg/ha compost application every 3–4 years, has not yielded desired soil organic matter (SOM) improvements. One-time high rate compost application and annual cover crop planting (instead of repetitive tillage) to control weeds have been proposed for carry-over SOM improvement in these systems. In this study, 15, 30 and 45 Mg/ha compost rates and controls (‘no amendment’ and inorganic fertilizer) were considered. One-half of fallow blocks were planted to cover crop mixtures. SOM indices: soil nitrate (NO3−), ammonium (NH4+), dissolved organic C/N (DOC/N), potential mineralizable N (PMN), carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) emissions, and soil moisture were measured bi-weekly across three winter wheat growing seasons. The 45 Mg/ha compost affected 25–35% more NO3− in the first growing season; 27–70%; 8–49%; 12–44% more DON, PMN, DOC and 25–57% less CO2 in the second growing season; but did not worsen global warming potential in any growing season. In the fallow phases, cover crops depleted 10–14% soil moisture in the first two growing seasons, which was recovered by precipitation in succeeding wheat phases. Cover crops utilized 21–46% soil NO3− in these growing seasons which reduced N2O emission by 26%. The 45 Mg/ha compost improved SOM and ensured environmental quality, but annual cover crop biomass (< 2000 kg/ha) did not add significant SOM. Therefore, integrating larger biomass producing cover crops with 45 Mg/ha compost in wheat-fallow rotations may be a better prospect.
A simple and scalable structure of Particle Swarm Optimization based on linear system theory
Authors: Zhu Jian , Liu Jianhua 
Published: October 2022

Abstract
Since it was fifirst presented, Particle Swarm Optimization (PSO) has seen numerous improvements as a traditional optimization process. PSO algorithm becomes more complex as a result of the majority of improvement strategies, which use learning model replacement or parameter adjustment to enhance PSO algorithm’s performance. Based on linear system theory, this paper proposes a simple and scalable framework for restructuring Particle Swarm Optimization (RPSO) and provides a new example of the RPSO algorithm framework, Q-RPSO. The framework of RPSO adopts one position updating formula instead of the original position and velocity updating formulas, which is unrelated to the velocity and the current position of PSO. The experiments have been carried out by comparison with the standard PSO algorithm and four PSO variants based on benchmark functions of CEC 2013. The experimental results demonstrate that, whether in terms of global exploration capability or convergence accuracy, Q-RPSO outperforms all competitor algorithms.
SplitDB: Building a large-scale key-value store based on LSM-tree by split operations
Authors: Ren Jiancheng , Chen Guanzhong , Qian Keyu 
Published: October 2022

Abstract
Key-value stores based on Log-Structured Merge Tree (LSM-tree) arewidely used in various big data storage scenarios. The performance bottleneck mainly comes from the compaction operation that maintains the order between LSM-tree levels. As the amount of data increases, the depth of the LSM-tree increases and the compaction becomes more and more complex, resulting in a significant degradation of read and write performance. In this paper, we propose a new LSM-tree structure based storage SplitDB to optimize the storage problem under large data volume, namely Split Log-Structured Merge Tree (SLSM-tree) storage model. SplitDB modifies part of the compaction into a split operation to improve execution speed and reduce write amplification. At the same time, it splits the keyrange and establishes multiple independent SLSM-trees to balance the pressure of each, and builds an index tree in memory to manage SLSM-trees. We implemented SplitDB on RocksDB and used micro-benchmarks and YCSB to evaluate SplitDB. In micro-benchmarks, SplitDB improved random write and random read throughput by 22% and 36%, respectively, and improved read-missing performance by 104% and scan performance by up to 93%. For the basic YCSB workload a-f also both improve the throughput by 36%-58%.
The Dynamics of Foreign Portfolio Investment, Equities Market Volatility and Exchange Rate in Zimbabwe
Authors: Mushaike Pasca , Mavodyo Elisha 
Published: October 2022

Abstract
In recent years, the amount of foreign equity investment inflows in Zimbabwe has decreased against the backdrop of an unstable and rapidly appreciating local currency. The aim of the study was to reveal the nexus among foreign portfolio investment, stock market performance and exchange rate in Zimbabwe from October 2018 to April 2022. The research utilized a package of hybrid multi-equation models including, vector autoregressive system to capture feedback relationships, EGARCH to incorporate asymmetric and volatility effects on stock performance and Granger causality to capture cause and effect dynamics. Impulse response functions and variance decompositions were employed to capture responses and innovations in the VAR system. Results revealed presence of short-lived volatility (implied risk) persistence, positive link between lagged market returns and foreign portfolio investment, inverse link between volatility of market returns and net foreign equity flows. On Granger causality, triangular linkages were revealed with unilateral causality emanating from foreign portfolio investment to stock market volatility (implied risk) to foreign portfolio investment volatility. Thus, it may be concluded that stock market volatility attenuated the relationship between foreign portfolio investment volatility and that relationship. Consequently, the study's empirical results has various policy ramifications. The investment community is recommended to buy assets at deep discounts and keep them for long-term wealth maximization in order to capitalize on the ZSE's transient volatility. In terms of policy recommendations, the Ministry of Finance is urged to reduce the withholding tax and capital gains tax on long-term stock and debt investors on the Zimbabwe Stock Exchange.
Dynamic Analysis of Gear Pairs with the Effects of Stick-slip
Authors: Xun Chao , Dai He , Wang Yunlong 
Published: October 2022

Abstract

A stick-slip dynamic model of a two-gear set is proposed. In this model, time-varying mesh stiffness, tooth separation, friction between the gear teeth surfaces and potential stick-slip are considered. Considering the contributions of the vibration velocity to the gear teeth sliding velocity, transition conditions between the stick state and slip state are revealed. Dynamic analysis shows that, when stick appears, the vibration amplitudes are dramatically increased, and tooth separation occurs. Additionally, stick also induces half-frequency components of the mesh frequency and causes chaos. Parametric studies show that heavy loads and rough tooth surfaces increase the probability of stick and increase the time of the stick state over a single mesh period. However, due to the complex nonlinearity, the existence of a certain relationship between the gear rotation speed and the stick time is not confirmed.
To experimental study of performance evaluation of masonry brick bond in shear and compression in comparison
Authors: Abbas Nadeem , Yousaf Muhammad , Akbar Muhammad , Huali Pan , Usman Yousaf M. , Guoqiang Ou 
Published: October 2022

The construction of a structure is prohibitively expensive due to high material and labour expenses. Still, the production of cement, which is the most widely used binding substance in construction, results in the emission of a large amount of CO2 into the atmosphere. It has only recently been discovered that Pakistan is short of approximately 9 million residential constructions. Thus, there is a great need for cost-effective and energy-efficient masonry construction because of economic and environmental concerns. Rat-trap masonry bond creates a cavity in the wall, which serves as both thermal insulation and a cost-saving measure. Because of the inherent property of rat-trap masonry bond, a cavity is formed in the wall, which not only serves as thermal insulation for the interior but is also cost-effective It has been observed that approximately 26.11 % of the total construction cost, comprising of labor and material, can be curtailed by adopting the rat-trap bonding technique. Rat-trap bond construction is recognized as a greener and more sustainable alternative to conventional brick bonds. A comparative study of the structural behavior of the rat-trap and conventionally used English bond has been conducted. 72 prisms of rat-trap bond and English bond from three sources of bricks were tested under compression load at the ages of 28 and 56 days. The same number of prisms were tested under diagonal tension load at both ages. 18 triplet prisms from all sources of bricks were tested for shear bond strength without lateral load, whereas 5 triplet prisms from every brick source were tested with a set of lateral pre-compression loading of 29 psi, 87 psi, and 145 psi. The results show that the rat-trap bond has much higher compressive and shear strengths than the English bond.
Identifying the key attributes of fresh water crisis in Dhaka city: A structural equation modeling approach
Authors: Sourav Md. Mohaimenul Islam , Islam Md Nafizul , Abeer Asif Ahmed 
Published: October 2022

Abstract
This paper aims to analyze how user behavior and climate change influence the freshwater demand in metropolitan areas. In total, 406 observations were obtained from different respondents in Dhaka city via an online survey. Our research demonstrates that the data are reliable and acceptable for factor analysis. Structural equation modeling (SEM) is adopted to show the relationships between the parameters. The model fit parameters (CFI, NFI, TLI, RMSEA, and so on) are used to choose the best structural equation (SE) model. Additionally, responses are analyzed by the relative importance index (RII) method and compared with the SEM results. This study shows that personal water waste and natural crises substantially impact the freshwater crisis. Excessive use of water during showering, washing clothing and dishes, washing vegetables, and pool refilling are the most common ways to wastewater. Furthermore, the ground layer in Dhaka city is gradually reducing due to the natural crisis, but the WASA pump's capacity is insufficient to pump up this water. This research aids policymakers in identifying the key attributes that are contributing to the urban freshwater crisis.
Intelligent or Smart Polymers: Advance in Novel Drug Delivery
Authors: Purohit Arpana , Jain Sameeksha , Nema Prakhar , Vishwakarma Harshna , Jain Prateek Kumar 
Published: October 2022

Novel drug delivery system utilizing smart polymer to get significant and attracting changes in the targeting of drugs, increasing the bioavailability of drugs, enhancement patient compliance and gene therapy. The scientific community tries to mimic nature in the way that living organisms adopt their behavior as a function of environmental conditions to improve survival. In this sense, smart polymers offer materials that respond to numerous stimuli (temperature, pH, electric and magnetic fields, light intensity, biological molecules, etc.), and scientists must devise the best way to apply them in all research areas. Smart polymers are representing promising means for targeted drug delivery, enhanced drug delivery, gene therapy, actuator stimuli and protein folders. Smart polymers are very promising applicants in drug delivery, tissue engineering, cell culture, gene carriers, textile engineering, oil recovery, radioactive wastage and protein purification. The study is focused on the entire features of smart polymers and their most recent and relevant applications.
Keywords: Smart polymer, Novel drug delivery system, Stimuli, Gene therapy
Pharmacognostical, Phytochemical and Pharmacological Evaluation of Mallotus philippensis
Authors: Pal Netra , Mandal Suraj , Shiva Km , Kumar Bijender 
Published: October 2022

The present study was aimed at Pharmacognostical, Phytochemical and Pharmacological evaluation of the plant Mallotus Philippinensis family- Euphorbiaceae. Pharmacognostical investigation were carried out by performing organoleptic, microscopical and physicochemical evaluation i.e. ash values, extractive values, moisture content, swelling index, foaming index and foreign matter. The obtained results showed that the moisture content was found to be 1.74%. Similarly swelling index was recorded to be (0.8cm). Foaming index (less than 100). Phytochemical investigation included successive soxhlet extraction, the obtained extractive values were 4.9%, 5.45%, 9.77%, 8.75%, and 4.4% for petroleum ether, chloroform, ethyl acetate, ethanol and distilled water respectively. The preliminary qualitative phytochemical screening revealed the presence of carbohydrates, phenolic compounds, alkaloids, glycosides, flavonoids, steroids, fixed oils and fats. Pharmacological investigation included the Anthelmentic activity by using the Mallotus Philippinensis plant ethyl acetate extract. The 200 mg/kg dose to be found positively in Pharmacological responses.
Keywords: Mallotus Philippinensis, Anthelmentic activity, Phytochemical investigation, Pharmacological investigation, Pharmacognostical investigation
Menakar loyalitas konsumen berdasarkan persepsi nilai dan kepercayaan merek geprek bensu
Authors: Sari Novita , Marta Rustono Farady , Angreani Natasia , Harry  , Perkasa Muhammad Iman Adi 
Published: October 2022

To build high brand equity, a strong foundation is needed that is costumer loyalty to a brand. Brand loyalty can be assessed from various aspect and in this research, researcher used the value received by costumers and the trust of costumers. The purpose of this research is to examine the effect of perceived value and brand trust of brand loyalty “Geprek Bensu” in Jakarta partially or simultaneously. In this research, the independent variable are perceived value (X1) and brand trust (X2) of Geprek Bensu in Jakarta, while the dependent variable is brand loyalty (Y). Population of this research is unlimited so it uses a sample of 130 respondents taken randomly (non-probability sampling) with a purposive sampling technique. The results of analysis SPSS can be concluded that perceived value and brand trust have a positive impact to brand loyalty partially and simultaneously with the result of T test for X1 is 2,055 and X2 is 7,604 which is grater than T tabel of 1,656. While the F test shows F count is 125,635 which has a higher figure than F table which is 3,07.
ANALISIS FAKTOR PENYEBAB ANAK PUTUS SEKOLAH DALAM PROGRAM PENDIDIKAN GRATIS KABUPATEN KAYONG UTARA
Authors: Aji Nugroho , Rustiyarso Rustiyarso , Salim Izhar 
Published: October 2022

ABSTRACTThis study aims to determine the factors that cause children to drop out of school in the free education program for students of SMA Negeri 2 Seponti, Kayong Utara Regency. The research method used is descriptive method with qualitative research forms. The data source of this research is the students of SMA Negeri 2 Seponti who have dropped out of school and the data are the results of observations and the results of interviews with school dropouts, parents of children, and school principals. The results showed that there were 6 children who had dropped out of school, the factors that caused children to drop out of school were caused by two factors, namely internal factors and external factors. Internal factors that cause children to drop out of school come from the factor of not having the desire to go to school, some children who have dropped out of school due to this factor are because children often skip school and never go to class. External factors that cause children to drop out of school come from economic factors and the environment where they live. peers who do not go to school and even promiscuity. Keywords: Dropout, Education, Free, School.
KETERAMPILAN MENGELOLA KELAS OLEH GURU PADA PEMBELAJARAN IPS DI KELAS VIII
Authors: Wendi Wendi , Okianna Okianna , Syahrudin Husni 
Published: October 2022

AbstractThis study aims at describing teachers’ classroom management skills in social science learning to year-8 A and year-8 B of SMP Negeri 23 Pontianak in regards to the way the teachers create the right learning atmosphere, set the classroom situation, and manage good interaction in teaching-learning process. This study uses descriptive qualitative approach. The data of this study is the teachers of social science and the students of year-8 A and year-8 B. The technique of data collecting is through observation, interview and documentation. The technique of data analysis is through reduction, display and deduction. The validity of the data is through triangulation of technique and source. The finding of the study shows that the teachers’ skills in classroom management in social science learning to year-8 A and year-8 B of SMP Negeri 23 Pontianak is relatively good from several ways; (1) applying the principles of classroom management including warmth, enthusiasm, challenge, variety, flexibility, emphasis on positive things and cultivation of discipline. (2) the setting of the classroom tends to only change the seat position when it is students’ group-work. (3) management of teaching-learning interaction is done through the skills of opening and closing, explaining, questioning, reinforcing and discussion guiding. Keywords: Classroom Management Skills, Social Science Learning, Teachers
使用任务教学法进行汉语教学的影响 ——以“KOPERASI高中一年级的学生”为例——
Authors: Septiningsih Annisa , Ina Ina , Veronica Tjen 
Published: October 2022

AbstractAt this time, Mandarin has been widely studied in schools. There are several competencies in learning Mandarin that students must master, such as good pronunciation, writing, and memorizing a lot of vocabularies. However, according to the majority of students, Mandarin is very difficult to learn. Improving students ability in learning Mandarin, the writer use a task based approach to students in class X SMA Koperasi Pontianak. The purpose of this study was to find out the improvement of the student’s ability in the class X of SMA Koperasi Pontianak by implementing the task based approach method in learning Mandarin. The research methodology used in this research was classroom action research and tests. Classroom action research started on January 20th, 2021 until February 17th, 2021. The test method in this study was divided into pre-test and post-test. Based on the results, the pre-test showed that the average score of the class was 61.29 for Mandarin subject. Meanwhile, based on the post-test results, it showed that the average score was 85.44. This proves that the task based approach method can improves students’ ability in learning Mandarin and improve students’ ability to learn independently.Keywords: Mandarin, Task Based Approach, Teaching Method
اسهامات علماء جزيرة ابن عمر في العلوم الشرعية خلال الفترة 5-10هـ/11-16م
Authors: Suleiman Hakim Ramadan , المنشداوي Khadir 
Published: October 2022

الملخص
تعد دراسة منطقة الجزيرة الفراتية من الدراسات الجديرة بالاهتمام نظرا لما تملكه من أهمية سياسية، وأقتصادية، وعلمية، فضلا عن دورها الفاعل في أحداث التاريخ الاسلامي، لذا تركزت جهود الباحثين على دراسة مدن الجزيرة الفراتية، وأحداثها لبيان أهمية تلك المدن وما قدمته في مختلف الحقب التاريخية، ونالت الجزيرة الفراتية اهتمام العديد من المؤرخين والبلدانيين العرب والمسلمين اضافة الى مجموعة من المستشرقين، ونظرا لاهمية جزيرة ابن عمر في كونها تشكل جزءا مهما من الجزيرة الفراتية اضافة الى كونها تعد من المناطق ذات الاغلبية الكردية حيث كان للكرد الدور المتميز في الجوانب السياسية والاقتصادية والادارية اضافة الى دورهم الحضاري في تلك الجزيرة وما قدموه من اسهامات علمية متميزة اضافوها للحضارة الاسلامية ياتي في مقدمتها دراسة العلوم الشرعية وقد اتخذت ذلك اي العلوم الشرعية في جزيرة ابن عمر موضوعا لبحثي هذا.
وقد قسمت البحث الى ثلاثة مباحث: في الاول منها تكلمت عن موقع وجغرافية وتسمية جزيرة ابن عمر ومن هم العلماء الذين انتسبوا اليها، والمبحث الثاني عن علماء القران الكريم في جزيرة ابن عمر، اما المبحث الاخير فقد خصصته لعلماء الحديث والفقه.
وقد اتضح لنا من خلال هذا البحث ان أغلب علماء جزيرة ابن عمر في العلوم الشرعية هم من الكرد الذين كان لهم الدور المتميز في دراسة وتدريس هذه العلوم، وان جزيرة ابن عمر كانت مركزا مهما من مراكز تدريس العلوم الشرعية والدليل على ذلك توافد الكثير من علماء القران الكريم والحديث لتدريس هذه العلوم في جزيرة ابن عمر، كذلك توافد طلبة العلم من مختلف الاقاليم الاسلامية الى جزيرة ابن عمر لدراسة تلك العلوم.