bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Prevention of Harmful Gases in Special Structures of Urban Deep Drainage Systems
Authors: Liu Hao
Published: September 2024

Wastewater remaining in pipes for extended periods can create anaerobic environments, fostering the growth of anaerobic bacteria and producing harmful gases such as methane and hydrogen sulfide. Additionally, certain structures within drainage systems, such as drop shafts and vertical shafts, induce turbulent flow, causing the release of dissolved harmful gases, which pose significant risks to public health and urban infrastructure. This study focused on the investigation and analysis of vertical shafts with helical tray structures in drainage systems. Using ANSYS 2021 R2 software, simulations of the shafts were conducted by employing the standard k-ε turbulence model and Eulerian multiphase flow method to simulate the shaft’s operation and obtain various parameters of hydrogen sulfide release. Concurrently, a scale model constructed in the laboratory was used to study and analyze the release of hydrogen sulfide gas dissolved in water from this type of structure. Combining the simulation and laboratory experiments, the hydrogen sulfide gas release rate from water in this structure was 0.05–0.4%. This research provides a reference for the study and control of hydrogen sulfide gas release.
Governance and Efficiency in Brazilian Water Utilities: An Analysis Based on Revenue Collection Efficiency
Authors: Barbosa Alexandro , Medeiros Felipe Anderson Smith de , Simões Pedro
Published: September 2024

This study analyzed the relevance of governance structure for efficient revenue collection by Brazilian water utilities (WUs). Data were collected from the National Information System on Sanitation (SNIS) for 127 Brazilian WUs, covering a balanced longitudinal panel from 2018 to 2022. The governance structures evaluated included ownership (public or private) and corporatization (publicly traded or not). We searched scientific databases and did not find any studies on the efficiency of specific WUs in collecting customer bills for services rendered and its relationship with this type of governance; thus, this is the main innovative contribution of this study to the literature. In the first stage, this study utilized the dynamic slack-based model (DSBM) to assess revenue collection efficiency. In the second stage, an econometric model with generalized estimating equation (GEE) was used to explain the efficiency. The findings revealed a global average inefficiency in revenue collection of 50.47%. Corporatization was linked to higher collection efficiencies, while ownership type was significantly linked with lower collection efficiency. Factors such as tariff accessibility, urbanization, and the COVID-19 pandemic also influenced efficiency. This study suggests that regulatory bodies should consider these insights to implement policies that prevent inefficiencies from affecting the tariff system for services.
Prediction of Ground Subsidence Induced by Groundwater Mining Using Three-Dimensional Variable-Parameter Fully Coupled Simulation
Authors: Du Jingjing , Zhang Yan , Luo Zujiang , Zhang Chenghang
Published: September 2024

In order to predict the ground settlement in a scientific, intuitive, and simple way, based on the theory of Bio-consolidation, a three-dimensional fluid-solid coupled numerical calculation programme FGS-3D for ground settlement was compiled by using the Fortran 95 language, and a front-end operation platform was developed by using Microsoft VisualBasic, so that a three-dimensional variable-parameter fully coupled viscoelastic-plastic model of ground settlement was constructed using the city of Yancheng as an example, and the development of ground settlement and horizontal displacement changes from 2021 to 2030 were predicted. The results show that the three-dimensional fully coupled finite-element numerical model of building load, groundwater seepage, and soil deformation established by the above computer development program can directly create a hydrogeological conceptual model of groundwater mining and predict ground settlement, so as to achieve the visualisation of the three-dimensional seepage of groundwater and the fully coupled simulation of ground subsidence in the whole process of groundwater mining. Under the joint action of construction load and groundwater mining, the water level of the aquifer in Yancheng City rises by 1.26 m on average in the main groundwater mining area of the group III pressurised aquifer, forming two smaller landing funnels, and the lowest water level of the two landing funnels is −15 m.
Optimized Design of Modular Constructed Wetland for Treating Rural Black–Odorous Water
Authors: Li Luyang , Zhang Zheng , Shen Yu , He Bing , Fu Yuang , Kou Shuangshuang , Gao Jingqing
Published: September 2024

In recent years, the phenomenon of black–odorous water has occurred frequently, and constructed wetlands have been widely used as an effective means of treating black–odorous water. In order to achieve the goal of low-carbon and high-efficiency long-term clean-up of black–odorous water, the modular constructed wetland system was optimized in this study. The optimized modular constructed wetland consisted of aeration, denitrification, and phosphorus removal, of which the denitrification module was a sulfur–iron autotrophic denitrification unit and the phosphorus removal module was a polyaluminum chloride composite filler phosphorus-removal unit. Experimental findings indicated that modular systems with layout ratios of 1:3:1 (A) and 1:2:2 (B) exhibit outstanding performance in remediating contaminants from black–odorous water. Notably, system B demonstrated superior treatment efficiency. Under conditions of high pollution loading, system B consistently achieved stable removal rates for COD (95.79%), TN (91.74%), NH4+-N (95.17%), and TP (82.21%). The combination of along-track changes and high-throughput sequencing results showed that the synergies among the units did not produce negative effects during the purification process, and each unit realized its predefined function. Changes in the substrate and internal environment of the wetland units caused changes in the microbial populations, and the unique microbial community structure of the units ensured that they were effective in removing different pollutants.
Evaluation of Water Quality and Pollution Source Analysis of Meihu Reservoir
Authors: Qi Yiting , Li Cong , Zhang Kai , Sumita  , Li Jun , He Zhengming , Cao Xin , Yan Ailan
Published: September 2024

Under the background of increasingly serious global environmental pollution, ensuring the safety of drinking water has become one of the focuses of global attention. In this study, Meihu Reservoir, a drinking water source, was selected as the research object, and the main pollution problems and their sources were revealed through conventional water quality analysis, suitability evaluation of the drinking water source and eutrophication evaluation of the reservoir. Using modern water quality monitoring technology and methods, the paper monitors and analyzes various water quality parameters of the Meihu Reservoir. The results showed that the water quality indexes, except total nitrogen, met the class II–III standard of drinking water, and the comprehensive nutrient state index method (TLI) evaluated the reservoir, and its index met 30≤TLI(∑)≤50, indicating that the reservoir belongs to the medium nutrition category. Therefore, the water quality of the reservoir has been affected by different degrees of agricultural, domestic and livestock pollution, mainly reflected in the serious excess of the total nitrogen index (the peak has reached 2.99 mg/L). The results of the on-site investigation showed that the main sources of nitrogen in the reservoir included agricultural non-point-source pollution, domestic sewage pollution, domestic garbage pollution and livestock and poultry pollution, accounting for 50.09%, 23.99%, 14.13% and 11.80% of the total load, respectively. On this basis, this paper puts forward some countermeasures for pollution control in order to provide a scientific basis and practical path for water quality protection and improvement of the Meihu Reservoir and other similar reservoirs.
Contaminant of Emerging Concerns in Modder River Catchment of Free State: Implication for Environmental Risk and Water Sources Protection
Authors: Oke Saheed Adeyinka
Published: September 2024

This study was aimed at monitoring the occurrence and potential sources of emerging contaminants in water sources within the Modder River catchment. Selected water quality indicators were analysed by Hanna multi-parameter meters. Emerging contaminants such as acetaminophen, carbamazepine, ibuprofen, atrazine, simazine, metolachlor, terbuthylazine, 17-alpha-ethinyl-estradiol, estradiol, progesterone, and testosterone were analysed by high performance liquid chromatography mass spectrometry. The sources of emerging contaminants were determined by statistical methods such as Pearson correlation and hierarchical cluster analysis. Results showed that all the sampled water sources have some level of questionable drinking water quality and necessitate some amount of treatment to reduce the contamination before consumption, especially DO, EC, and pH. The 17-alpha-ethinyl-estradiol mean values in rivers (7.79 and 31.55 µg/L), dams (1.83 and 6.90 µg/L), and treated drinking water (0.2 and 0.73 µg/L) were the highest in summer and autumn seasons, respectively. Wastewater effluents, domestic sewage, urban surface runoff, agricultural runoff, and illegal dumping were identified as the possible sources of emerging contaminants pollution. Waste management education, proper application of herbicides, and advance wastewater treatment methods were some of the suggested mitigation strategies. The outcomes may be relevant for environmental protection and water sustainability in the catchment.
A nonlinear noise active control algorithm based on deep neural network
Authors: Juang Shuang , Cao Lie , Guo Hui , Wang Yansong , Tao Yuan , Liu Ningning
Published: September 2024

To solve the problem that the traditional filter-x least mean square (FxLMS) algorithm and the correlation variable step FxLMS algorithms cannot handle nonlinear interference, a nonlinear noise active control algorithm based on deep neural network (DNN) is proposed. First, nonlinear
interference between the acoustic channel and the secondary loudspeaker is introduced into the active noise control system. Second, the training objectives and loss functions of the deep neural network are set, and the network parameters are trained. Finally, a simulation of the active noise
control in the local workspace of a tufted carpet loom is carried out to verify the performance of the DNN algorithm. The results show that the DNN algorithm is effective in dealing with nonlinear disturbances.
Straightness Measurement Based on FOG-IMU and Shearer Motion Constraints for Longwall Coal Mining
Authors: Shang Ziqin , Chen Shaohua , Li Guannan , Zheng Yi , Dai Jianping , Qiu Jinbo , Hu Huizhu
Published: September 2024

Straightness measurements of fully mechanized coal faces are a core requirement for intelligent, comprehensive coal mining. In coal mining, using an inertial measurement unit (IMU) assisted by an odometer for straightness measurement is vital for automating longwall mining. IMUs are less vulnerable to dim and harsh underground mining conditions. However, IMU divergence cannot be controlled solely by the forward velocity obtained from the odometer. To address this problem without external sensors, this paper proposes a straightness measurement method based on a fiber optic gyroscope-IMU/odometer and shearer motion constraints. The motion of the shearer is constrained to correct the pitch and roll attitude angle errors in strapdown inertial navigation solution (SINS) attitude solutions. An extended Kalman filter was established to combine the SINS and dead reckoning using the output from the odometer. Finally, the position estimation obtained by Kalman filter fusion was converted into straightness. An experiment based on a custom-built test rail demonstrated that the proposed algorithm effectively improved the accuracy of straightness measurements in multiple cutting cycles. The error of the results in the horizontal plane was reduced by 45% compared to the traditional IMU/odometer method. This study is important in promoting the unmanned and intelligent development of China’s coal industry.
Transport Mission Mitigation of Personalized Daily Commuting in China
Authors: Sun Sudan , Gao Yuhong , Xia Yingji , Chen Xiqun
Published: September 2024

Daily commuting constitutes a major part of urban mobility. Personalized transport modes for daily commuting have been adopted increasingly, such as car driving, shared mobility, etc. In general, this trend is against the Sustainable Development Goals’ aim of reducing emissions from the transport sector and improving urban ecosystem sustainability. We show the related statistics and advocate the use of nonmotor vehicles to mitigate greenhouse gas emissions and adverse environmental impacts of personalized daily commuting.
Simulasi Sistem Pelayanan Pemesanan Kedai Kopi XYZ Cabang Sidewalk - Jimbaran
Authors: Utami Ni Made Cyntia , Sitanggang Bryan Estavan Imanuel , Widhiatmika I Wayan Ananta , Wahyuni Ni Nengah Trisna , Aryani Ni Ketut Indah
Published: September 2024

Pemodelan sistem nyata ke dalam suatu model dilakukan dengan sistem simulasi, yang merupakan suatu cara  untuk  menirukan  sistem  nyata  dengan  sifat  yang  lebih mudah untuk diamati daripada sistem aslinya. Suatu sistem dapat menghasilkan antrian apabila adanya keterlambatan pelayanan seperti yang terjadi pada sebuah kedai kopi. Kedai Kopi XYZ adalah salah satu merek kopi yang terkenal di Indonesia. Lokasi penelitian yang dilakukan yaitu di Kedai Kopi XYZ cabang Sidewalk, Jimbaran. Alasan tempat tersebut  dijadikan lokasi penelitian karena terdapatnya antrian pada sistem pelayanannya serta adanya pelanggan yang meninggalkan antrian sebelum dilayani. Pegawai yang telah diwawancarai mengatakan bahwa beberapa pelanggan yang komplain mengenai lokasi yang tidak terlalu luas yang mengakibatkan mengantri hingga area luar kedai kopi.  Tujuan dari penelitian ini adalah untuk mengurangi antrianm dengan melakukan perbaikan terhadap lokasi pada sistem. Data antrian yang telah didapat dari lapangan selanjutnya dilakukan pengolahan data dengan Stat::Fit dan ProModel. Ketika sistem dengan data yang ada dilakukan run simulation masih terdapat blocked pada Entity States serta terdapat full atau bottleneck pada Multiple Capacity Location States. Hasil dari simulasi perbaikan yaitu perbaikan pada location yang terdapat dalam sistem berupa penambahan kapasitas tiap lokasi untuk menghindari dan meminimalisir terjadinya antrian. Dengan mengubah kapasitas yang ada akan dihasilkan block dan full yang minim dan dapat dikatakan wajar dalam sistem. Dengan demikian, sistem model pada Kedai Kopi XYZ cabang Sidewalk, Jimbaran dapat disimpulkan dapat bekerja dengan optimal.
Penentuan Rute Pembukaan Gerai Baru dengan Vehicle Routing Problem with Time Windows Pendekatan Nearest Neighbor
Authors: Hajar Granita , Rachmaniar Desita Nur , Fauzi Muhammad Dzulfikar
Published: September 2024

Industri makanan dan minuman mulai banyak mendapatkan perhatian di kalangan masyarakat. Hal ini diperkuat dengan mulai banyaknya gerai-gerai makananan dan minuman yang mulai bemunculan. Bahkan dalam satu kota, terutama Surabaya, bisa memiliki belasan gerai karena antusiasme masyarakat yang begitu tinggi. Salah satu gerai minuman yang sedang popular saat ini adalah minuman boba atau bubble drink. Penelitian sebelumnya telah dilakukan penentuan gerai potensial yang akan dibuka. Setelah mendapatkan rekomendasi gerai baru penelitian ini dilanjutkan dengan melakukan penentuan rute pengiriman bahan baku dengan batasan waktu operasional dari masing-masing outlet. Penelitian ini bertujuan untuk menentukan rute pendistribusian bahan baku yang baru untuk gerai-gerai minuman yang ada di beberapa lokasi sehingga dapat meminimumkan jarak tempuh dan biaya transportasi. Penelitian ini menggunakan Vehicle Routing Problem with Time Windows atau VRPTW dengan pendekatan nearest neighbor. VRPTW merupakan VRP yang paling ideal yang sering digunakan pada dunia industri. Saat ini terdapat sembilan gerai dengan time windows yang berbeda-beda. Hasil dari penelitian ini didapatkan dua rute dengan jarak tempuh masing-masing 96.4 km dan 35.7 km dengan total cost Rp.68.000,- sedangkan waktu tempuh 289.2 menit dan 163.5 menit dengan total cost Rp.89.828,- dalam sekali melakukan pengiriman.
Proses Pengambilan Keputusan Bantuan Beasiswa SEHATI di Yayasan Senyum Kita dengan Metode DEMATEL dan F-AHP
Authors: Syahruni Aenun , Kurniawan V. Reza Bayu , Ma’arif Syamsul
Published: September 2024

Proses pengambilan keputusan dalam penentuan penerima Beasiswa SEHATI oleh Yayasan Senyum Kita sering kali dihadapkan pada tantangan dalam memastikan transparansi dan keadilan. Penelitian ini bertujuan untuk meningkatkan sistem pengambilan keputusan dengan menerapkan metode MCDM antara lain DEMATEL (Decision Making Trial and Evaluation Laboratory) dan F-AHP (Fuzzy Analytic Hierarchy Process). Penelitian ini melibatkan 20 anak pada tahun ajaran 2023/2024 semester ganjil dengan mengkaji tiga kriteria utama, yaitu pendapatan orang tua/wali (K1), status anak yatim/piatu (K2), dan penyandang disabilitas (K3). Hasil dari kedua metode menunjukkan dominasi kriteria K2 dalam proses seleksi. Hasil analisis DEMATEL mengungkapkan bahwa K2 memiliki pengaruh paling signifikan dalam pengambilan keputusan, sementara F-AHP mengkonfirmasi pengaruh ini dengan memberikan bobot tertinggi sebesar 0.37 dari total 1.00. Selanjutnya, kedua metode mengindikasikan jumlah anak yang memenuhi kualifikasi hampir sama, yaitu 11 anak menurut DEMATEL dan 10 anak menurut F-AHP. Penerapan metode DEMATEL dan F-AHP berhasil meningkatkan transparansi dan objektivitas dalam seleksi, serta memberikan rekomendasi sebuah kerangka kerja yang lebih sistematis untuk penilaian kelayakan penerima beasiswa.
Strategi Peramalan dan Pengendalian Persediaan Suku Cadang di Industri Pengolahan dan Importir Kayu Lapis
Authors: Amallynda Ikhlasul , Wicaksono Erwin
Published: September 2024

PT XYZ merupakan perusahaan produsen dan pengekspor produk kayu lapis. Saat ini pengelolaan persediaan suku cadang masih dilakukan secara intuitif berdasarkan data kebutuhan suku cadang di periode sebelumnya. Akibatnya, seringkali terjadi kekurangan stok suku cadang saat dibutuhkan. Kekurangan stok suku cadang dapat menyebabkan gangguan operasional yang signifikan, seperti peningkatan waktu henti produksi, penurunan efisiensi, dan biaya tambahan untuk pengadaan darurat. Ini juga dapat mengurangi kepuasan pelanggan jika pesanan tertunda atau tidak dapat dipenuhi tepat waktu, yang akhirnya mempengaruhi reputasi perusahaan dan profitabilitas.  Pengelolaan persediaan suku cadang menjadi masalah yang kompleks karena dibutuhkannya respon yang cepat untuk menekan waktu kerusakan dan risiko keusangan suku cadang mesin produksi. Selain itu, suku cadang memiliki pola permintaan yang unik, dimana permintaan tidak terjadi setiap periode dan memiliki variansi yang tinggi. Sehingga dapat digolongkan sebagai permintaan yang intermittent bahkan lumpy. Maka dalam penelitian ini akan dibahas tentang pengendalian persediaan suku cadang yang dimulai dari pengklasifikasian suku cadang menggunakan metode ADI – CV. Perkiraan kebutuhan suku cadang menggunakan metode simple moving average, single exponential smoothing, Croston’s method, Syntetos-Boylan approximation, dan simulasi Montecarlo. Perbandingan performansi antar metode peramalan dilakukan dengan mempertimbangkan lima ukuran tingkat keakuratan, yakni: Adjusted Mean Absolute Percentage Error (A-MAPE), Mean Error (ME), dan Mean Square Error (MSE). Berdasarkan hasil perkiraan kebutuhan terbaik, akan dilakukan perhitungan safety stock, reorder point dan jumlah pemesanan optimal dengan metode periodic review.
IMPROVING WRITING SKILL OF JUNIOR HIGH SCHOOL STUDENTS THROUGH PICTURE SERIES MEDIA
Authors: Oktaviani Esti Dwi
Published: September 2024

This research objective was to find out whether there was any significant difference in studentsâ€™ writing skill before and after being taught using Picture Series media in learning recount text at Eighth grade students of SMP Negeri 8Tarakan. The design of this research was Pre-Experimental research. The population in this research was all of the eighth grade students at SMP Negeri 8 Tarakan. The sample Â in Â this Â research Â was Â 30 Â students. Â The Â sample Â was Â chosen Â byÂ  using purposive sampling technique. Class for treatment was VIII-6. It consisted of 30 students. The steps in this research were pretest, treatment, and posttest. In the pretest, the students were asked to write the writing test. After giving the pretest, the researcher gave treatment. The treatment class was taught by using Picture Series media. After giving the treatment, students were asked to write the writing test in posttest. In analyzing the data, the researcher was used paired sample t-test in SPSS 24.0. The result of this research showed that there was different mean score in pretest and posttest. It was proven by the result of the studentsâ€™ mean score from pretest was 36.27 and 43.20 in the posttest. It means that the improvement of the studentsâ€™ mean score was 6.93. The result of Paired Sample t-test was 2.119 higher than t-table was 2.045. It means that the studentsâ€™ writing skill in recount text have an improvement after giving the treatment. The result of sig (2 tailed). 0.000 is lower than 0.05, it means that the Picture Series media can give any contribution to the studentsâ€™ writing skill. Based on the explanation above, it can be concluded that using Picture Series Media is effective to improve studentâ€™s writing skill in recount text.Â
THE USE OF INTERNET-ASSISTED LANGUAGE TEACHING FOR EFL CLASSROOM IN INDONESIAN MADRASAH
Authors: Fauziah Zumrotul
Published: September 2024

The rapid development of technology affects all aspects of life includes education. It becomes essential for teachers to possess skill or competencies on using the internet technology for teaching. Teachersâ€™ belief and competencies affects their attitude towards the use of internet technology for teaching. The aim of this study is to explore the teachersâ€™ perceptions of the use of Internet-Assisted Language Teaching (IALT) for EFL Classroom in Indonesian Madrasah (Islamic School). The data of this survey study is collected through questionnaire and interview. The questionnaires are distributed on-line using Google form to 35English teachers of Madrasah in several regions of Indonesia, but only 26 returned. The data was analyzed using descriptive statistics and interpreted comprehensively. The result of the study shows that the majority of the English teachers in Madrasah have positive learning experience and positive attitude toward the use of IALT in their EFL classroom. However, they perceived that they lack of competencies and less knowledge to use the internet for teaching. Therefore, they need internet technology training to improve their skill in using and integrating internet technology for teaching EFL classroom.
THE ANALYSIS OF EFL LEARNERSâ€™ SELF-CONFIDENCE TO AFFLUENCE THE UNCOMMUNICATIVENESS IN SPEAKING SKILL
Authors: Renaldi Ikrar Genidal
Published: September 2024

This study deals to increase the English as a Foreign Language (EFL) students' confidence in English speaking. This research used qualitative analysis by distributing questioner. This study suggest that EFL teachers should seek ways to increase students' collaboration in the classroom to help them gain confidence in speaking. The study involved the students in the fifth semester (class 1) in the English Department in the 2018/2019 academic year, Tidar University. The researcher compared the gathered data with other relevant researches and theories involved in the study. Based on the research questions, the research result shows that studentsâ€™ perceptions of self-confidence have a significant to decrease reticence in speaking skills. However, lecturers need to push the students in practice speaking English in front of a class, especially to improve the self-confidence when the students are communicating in English. Two research questions were formulated in this study. There are: (1) what are the factors of the EFL studentsâ€™ reticence in speaking? (2) Do the students have high self-confidence in speaking skills?Â
THE ANALYSIS OF READING INTEREST BY FIFTH SEMESTER STUDENTS AT TIDAR UNIVERSITY
Authors: Riadil Ikrar Genidal
Published: September 2024

This research decomposes with Teaching English as a Foreign Language (TEFL) of readinginterest by fifth-semester students in class skill one of English Department at Tidar University.This research to identify how much the reading interest of students in class skill one of EnglishDepartment at Tidar University, so the teacher can know how to develop and maintain the readinginterest of their students rightly in reading activity especially reading English material. Thisresearch applies a descriptive qualitative method which used a questionnaire to build this research.
EXPLORING EFL STUDENTSâ€™ PERCEPTION ON CLOUDX ONLINE LEARNING MEDIA OF ELEVENTH GRADE AT SMK NEGERI 1 TANJUNG SELOR
Authors: Idayanti Nurul , Vega Nofvia De , Ajisoko Pangkuh
Published: September 2024

This study aims to describe the perception of EFL students towards the onlinelearning media CloudX class XI at SMK Negeri 1 Tanjung Selor. This study uses aquantitative descriptive approach. Samples were taken as many as 70 respondentsfrom class XI SMK Negeri 1 Tanjung Selor. Data collection techniques are usingquestionnaires and interview guidelines. The results of the questionnaire wereanalyzed using descriptive statistical analysis and interview results as supportinginformation. The results of this study indicate that EFL students provide perceptionsof CloudX online learning media from the positive and negative sides. On thepositive side, students are helped to take distance learning at home through virtualmeetings using the CloudX application. In addition, there are several features suchas audio, video, chat rooms, and share screens to support students and teachers indiscussing and communicating in the online learning process. Therefore, studentscan easily understand the learning topic because the teacher can share and explainthe material at the same time. Furthermore, the CloudX app also provides a positiveexperience with students. For example, students can know how to use technology (egCloudX). However, EFL students also gave negative perceptions of online learningthrough CloudX. Based on the results of the study, sometimes online learningthrough CloudX is not effective because there are several obstacles such as studentsnot having a good internet connection and not all students having adequate facilities(such as smartphones or laptops) as supporting devices to attend virtual meetingsthrough CloudX. On the other hand, most students prefer to share and discuss ideaswith peers and colleagues, responding to online discussions in traditional face-tofaceclassesasinnormalsituationsbeforedistanceeducationwasimplemented.
THE EFFECT OF SYNCHRONOUS AND ASYNCHRONOUS EFL CLASS ON STUDENTSâ€™ ACHIEVEMENT AT ELEVENTH GRADE OF SMAN TERPADU UNGGULAN 1 TANA TIDUNG
Authors: Manuk Maria Carla , Ulfaika Romlah , Fitriawati Fitriawati
Published: September 2024

The purpose of this study was to find out if synchronous and asynchronous could improve the studentâ€™s English achievement in the eleventh grade of SMAN Terpadu Unggulan 1 Tana Tidung. This research used a quasi- experimental research method to find out the differences before and after being taught using the approach. The subject of this study were the students of class XI at MIPA 1 and MIPA 3 with the total number of 52 students of SMAN Terpadu Unggulan 1 Tana Tidung in academic year of 2021/2022. The instrument was an essay of writing a paragraph. The result of this study indicated that there was no significant differences between the pretest and posttest both in synchronous and asynchronous class and it was proven by the result of studentsâ€™ average score. The average score of the pretest in synchronous class was 62.68 and the average score of posttest was 62.86. The average score of pretest in asynchronous class was 61.67 and the average score of posttest was 63.96. The average score in posttest was relatively similar with the pretest score. It showed that there was no significant difference in student English achievement on pretest and posttest. The test result from the independent sample test showed that t-test (0.458) was lower than the t- table (1.676). Therefore, it can be concluded that synchronous and asynchronous was less effective in impoving the student English achievement at eleventh grade of SMAN Terpadu Unggulan 1 Tana Tidung.
THE CORRELATION BETWEEN EIGHTH GRADERSâ€™ LEARNING MOTIVATION AND ENGLISH ACHIEVEMENT DURING THE PANDEMIC AT SMPN 1 TARAKAN
Authors: Oktafiani Megawati , Eppendi Jhoni
Published: September 2024

This study investigated the association between students' enthusiasm to learn and their English academic performance in the eighth grade at SMPN 1 Tarakan during the pandemic. This investigation employed a quantitative methodology based on the correlation method. A stratified random sampling procedure was used to choose the 54 eighth-graders from SMP Negeri 1 Tarakan sample. A learning motivation survey and an examination of the student's English Semester Exam results were used to gather the data. The association between students' motivation for learning and their proficiency in English was examined using Pearson's product-moment correlation. The mean score of 59.50 out of 29.63% on the questionnaire indicated that the eighth graders of SMPN 1 Tarakan were not enthusiastic about learning despite the epidemic. During the pandemic, the English scores of eighth-graders were also low, with a mean score of 57.19, or approximately 66.67%. During the pandemic, students at SMPN 1 Tarakan exhibited a highly significant correlation between their English achievement and their motivation to learn, as indicated by this finding.
ANALYSIS OF STUDENTSâ€™ DIFFICULTIES IN UNDERSTANDING ENGLISH VIDEO (A DESCRIPTIVE STUDY)
Authors: Prayudha.S Joko , Suja Aidillah
Published: September 2024

At this time the use of English has become part of modern human communication habits. Almost all existing linguistic aspects also often switch in English as a variation of language use. Even so, the use and understanding of good and correct English is still very necessary to be taught to students so that they have a good understanding of the use of English. One way to practice English comprehension is through the use of English videos. Videos in English provide opportunities for students to understand more broadly how the language is used in everyday life. However, in fact there are still many students who still have difficulty understanding the meaning and use of English sentences when watching English videos. Therefore this study examines students' perceptions of difficulties in understanding the meaning and use of English when watching English videos. The research method used is qualitative through a descriptive approach. The informants in this study consisted of several students who attended English classes by watching English videos. Data obtained through learning observation and interviews. Data were analyzed through data reduction, data display, and conclusions. The results of the study showed that students experienced various difficulties when understanding words or sentences from the English videos they watched, such as the use of foreign vocabulary that they had not encountered before, fast dialogue which made it difficult for students to digest the intent of the video conversation, students experienced obstacles in constructing meaning. and descriptions of scenes making it difficult to understand the context of sentences, lack of understanding of students in connecting vocabulary into an ambiguous sentence, and limitations of students in exploring the storyline of the video shown. To overcome this difficulty problem, English teachers need to provide appropriate teaching solutions so that students can better understand the meaning of English video dialogue so that they can build skills in constructing good and correct student sentence patterns.
ENHANCING STUDENTS' ENGLISH PRONUNCIATION THROUGH CAKE APPLICATION
Authors: Deliani Thia Wulan
Published: September 2024

The researcher who was taking part in this study was putting a strong emphasis on pronunciation and application as the primary areas of investigation. This was carried out to enhance the student's capacity to acquire an accent. This study used both an experimental technique and a quasi-experimental configuration to develop its research structure. Each of these approaches was used in conjunction with the other. Participants in this study were categorized into two independent groups: the control group and the experimental group. Both groups were responsible for carrying out the research experiment. There was no difference between the obligations that were given to both of the groups. It was revealed through the data processes that enhancing the pronunciation skill using cake application has a beneficial impact on the studentsâ€™ English pronunciation studentsâ€™ level.Â
Functional textile surface production by analysing the mechanical properties
of cotton, bamboo and linen woven surfaces
Authors: CEVIZ NURAY , YUKSELOGLU SEVHAN MUGE
Published: September 2024

In the textile industry, it is seen that the use of nanomaterials is increasing to meet the demands for long-lasting and
sustainable products. This research aims to improve the mechanical properties of 1×1 plain weave cotton, bamboo and
linen surfaces made of natural yarns by coating them with ZnO, TiO2 and SiO2 to provide sustainable natural life and
create a sustainable functional textile surface. For this reason, coatings were made with nanoparticles and applied to
textile surfaces. The blade (stripping knife) coating method with subsequent dosing was used when the coating agent
was liquid with an appropriate viscosity value. The surface morphology of the treated fabric was characterized by SEM,
EDS and FT-IR analysis. Mechanical properties were analysed by thickness, weight and tear strength tests and
antibacterial activity against S. Aureus and E. Coli bacteria were tested. When the results were examined, it was
determined that cotton, linen and bamboo surfaces, which did not have antibacterial properties except for E. Coli
(49.56%), showed antibacterial properties (100%) in bamboo and linen after coating with ZnO and TiO2 , and in bamboo
after coating with SiO2 . The coating material also caused different effects in terms of thickness, weight and strength
change.
Traditional marketing mix helps clothing store brands analyse service value
and increase customer retention
Authors: OTHMAN BESTOON
Published: September 2024

This study sought to determine how the conventional marketing mix might assist low-cost clothes in assessing the value
of their services and increasing client retention. Due to this shortage, contemporary authors have suggested introducing
an additional crucial aspect, namely after-sales support, while studying the service marketing mix (SMM) for “cheap
clothes”. This study examined and included one new dimension of the service marketing mix instead of the conventional
7 P's of SMM. In this study, the effects of SMM cloths on service quality and client retention in Hubei Province were also
examined. These effects included advertising, place, people, product, pricing, process, physical evidence, and after-
sales service. Clothing Store brand providers from “Hubei Province” compete with one another in a crowded market
since there are so many new entrants selling and providing comparable goods and services. Retention consequently
becomes an issue. Surveys with different persons in various positions, such as professors, PhD students, MSc students,
and BSc students of various nationalities, were done, and data was obtained using the convenience sample technique.
In “Hubei Province”, the sampling technique was utilized to gather information from clothes whose guests had ever
stayed in low-cost Hubei Province clothes. The Partial Least Square Method was utilized to evaluate the data from the
385 valid questionnaires that were obtained for this investigation. The results showed that both directly and indirectly,
through service value, the service marketing mix had a considerable beneficial impact on customer retention. This study
will be valuable to the low-cost Cloth sector since it will clarify the role that marketing mix strategies have in sustaining
long-term client connections.
AdaBoost algorithm for the recognition of young women’s body shapes
based on 2D images
Authors: TONG YAO , YUENING MIN , JUN WANG , BAIXUE ZHOU , LI PAN
Published: September 2024

Classifying and recognizing the human body shape during human body measurements based on 2D images helps to
improve measurement accuracy. In this paper, 430 young women's 2D body images were selected to establish 2D body
datasets. The characteristic indices used to represent the body shape in 2D images were extracted by computer vision
technology, namely the body height pixel value, projected unit area, and projected area ratio of the front and side of the
body. The two-step cluster model was used to classify the body shape into three clusters: the tall, flat, and medium
fatness type; the short, thin, and medium roundness type; and the round, fat, and medium height type. Then, the
decision tree model and AdaBoost algorithm, an ensemble learning algorithm with the decision tree as the weak
classifier, were used to recognize the body shape. The results show that the recognition accuracy of the decision tree
recognition model was 93.19%. The body shape recognition method using AdaBoost achieved a better recognition effect
than the decision tree model, and the recognition accuracy of the test set reached 97.35%. Through comparative study,
we found that the recognition accuracy of the 2D body shape recognition method based on AdaBoost was improved and
that the recognition accuracy was relatively stable. This study provides a new method for the recognition of human body
shape in clothing customization and online shopping.
Study of extraction and characterization of ultimate kenaf fibres
Authors: JAOUADI MOUNIR , HALIMI MOHAMED TAHER , MSAHLI SLAH
Published: September 2024

This study proposed an extraction process of Tunisian kenaf fibres to obtain ultimate fibres with minimum aspect ratio,
minimum retention capacity and high yield and high absorption capacity. The extraction process was performed by
varying the treatment duration (120–180 min), the temperature (110–130°C), and the sodium concentration (10–40 g/l).
After that, a factorial design, that has been built using statistical software Minitab.17, was followed to identify the
optimum operating conditions. After the extraction process, kenaf fibres were used to produce dry-laid nonwoven fabrics.
Results reveal that mixed treatment improves the absorption properties of fibres. To characterize these fibres, some
properties were measured like morphological structure and absorption properties: absorption and retention capacity. The
morphology of the cellulose fibres (length and, diameter distribution), obtained from the optimum process, was
determined by measuring 300 fibres with «Leica» optical microscopy. Ultimate fibres extracted from kenaf had an
absorption capacity of 12.5 g/g and a retention capacity of 0.65 g/g. Finally, the characteristics of the optimum ultimate
kenaf were compared to those of other vegetable fibres.
A promising perspective to upgrade cotton dyeing performances when dyed
with a red fluorescent pigment
Authors: ALGAMDY HIND
Published: September 2024

This paper studied the dyeing with a fluorescent red pigment, and several dyeing performance problems were detected.
This research aims to improve these performances, particularly those of dyeing fastness. Various surface treatments
have been applied to bleached cotton fabrics to do this. Two commercial agents have been used, namely ST1 and ST2,
which are essentially quaternary ammonium preparations with a cationic character. In addition, the dyeing process
parameters have been studied, namely, the dyeing temperature, time and pH, to achieve the best conditions allowing
acceptable dyeing performances with the fluorescent red pigment. Moreover, SEM images were taken for treated and
untreated cotton fabrics, and no great morphological differences were detected. Finally, dyeing performances were
evaluated based on the measurement of colourimetric coordinates, colour yield K/S and dyeing fastness properties. Very
promising results have been found following a surface treatment with 8% of the agent ST1, a dyeing process of
30 inutes at 50°C for a pH of 8.
EXPERIMENTAI STUDY ON THE CLEANING PERFORMANCE OF BIONIC SCREEN BASED ON EARTHWORM MOTION CHARACTERISTICS
Authors: YU Yongtao , LI Yanjun , XIE Fuxiang , SONG Jian
Published: September 2024

As the feeding mass of harvester continues to be increased, the accumulation of the maize mixture on the screen more serious, leading to a decrease in screening efficiency of the cleaning screen. The maize mixture on the screen was quickly transported backward through a bionic screen based on the motion characteristics of earthworms to reduce accumulation. However, the impact of the main operating parameters of this bionic screen on the cleaning performance was not yet clear. Therefore, the main operating parameters that affect the loss percentage and impurity percentage of maize grain in the cleaning device of bionic screen were simulated using CFD-DEM. Analysis of variance, regression and response surface were carried out on the test data, and the optimal parameter combination was obtained through parameter optimization: the concave depth of the screen surface was 25 mm, the installation angle of the screen surface was –5.5°, and the airflow velocity at the inlet of the cleaning device was 12.3 m/s. At this time, the lost percentage of maize grain was 1.56%, and the impurity percentage of maize grain was 1.85%, which met the requirements of national standards. The experiment provides reference and basis for the follow-up exploration of the screening mechanism of bionic screen.
Komposisi dan Struktur Vegetasi Hutan Mangrove di Desa Tinongko Pulau MantehageTaman Nasional Bunaken
Authors: Sanning Cicilia , Johny S.Tasirin  , Wawan Nurmawan
Published: September 2024

Abstrak
Penelitian ini bertujuan untuk menganalisis komposisi, struktur dan zonasi hutan mangrove di Desa Tinongko, Pulau Mantehage dalam kawasan Taman Nasional Bunaken. Kawasan mangrove yang dipilih sebagai objek penelitian adalah mangrove yang memiliki garis pantai dan berhadapan dengan laut. Penelitian ini menggunakan metode plot sistematik yang diletakkan pada tiga zona mangrove menurut posisi mangrove terhadap daratan dan laut yakni zona dalam, tengah dan luar. Penelitian ini mendapatkan 9 dari 4 famili yaitu Avicennia officinalis (Avicenniaceae), Bruguiera cylindrica, Bruguiera gymnorrhiza, Ceriops tagal, Rhizophora apiculata, Rhizophora mucronata, dan Rhizophora stylosa (Rhizophoraceae), Lumnitzera racemosa (Combretaceae) dan Sonneratia alba (Sonneratiaceae). Struktur vegetasi semai didominasi Rhizophora mucronata (INP 70.0%), pancang didominasi Rhizophora mucronata (INP 33.5%), tiang didominasi Rhizophora apiculata (INP 98.6%) dan pohon didominasi Sonneratia alba (INP 129.42%). Hutan mangrove di Desa Tinongko di zona dalam ditumbuhi oleh Avicennia officinalis, Bruguiera gymnorrhiza, Rhizophora apiculata, Rhizophora mucronata, Ceriops tagal, Rhizophora stylosa, dan Sonneratia alba. Zona tengah ditumbuhi oleh Rhizophora mucronata, Rhizophora apiculata, Bruguiera cylindrica, Bruguiera gymnorrhiza, dan Sonneratia alba. Zona luar ditumbuhi oleh Sonneratia alba, Bruguiera gymnorrhiza, Rhizophora apiculata, Rhizophora mucronata dan Lumnitzera racemosa.
Kata kunci: Struktur vegetasi, komposisi vegetasi, mangrove, Bunaken, dominasi
Keanekaragaman Jenis dan Ekologi Gastropoda Terrestrial di Kawasan Pengungsian Satwa Tanjung Binerean Kabupaten Bolaang Mongondow Selatan
Authors: Malemboris Dolvia Evert , Tasirin Johny S. , Kainde Reynold P.
Published: September 2024

Keanekaragaman hayati merupakan istilah yang digunakan untuk menggambarkan kelimpahan berbagai organisme di muka bumi, keanekaragaman hayati meliputi keanekaragaman habitat, spesies sampai pada keanekaragaman genetic. Gastropoda merupakan salah satu keanekaragaman hayati, berupa hewan invertebrata dan merupakan organisme yang memiliki peran ekologis yang penting dengan mengubah detritus organic menjadi biomassa yang pada akhirnya akan berperan dalam siklus makan dan energy. Penelitian ini bertujuan untuk mengukur struktur komunitas, keanekaragaman hayati dan faktor ekologi yang mempengaruhi kehadiran gastropoda darat di Kawasan Pengungsian Satwa Tanjung Binerean, Kabupaten bolaang Mongondow Selatan. Pengamatan gastropoda dilakukan dengan observasi langsung dengan menempatkan 1 garis transek sepanjang 1887 meter tegak lurus dari arah pantai menuju daratan mengikuti punggungan bukit dengan menempatkan 3 segmen yang akan diamati. Dijumpai sebanyak 9 jenis gastropoda darat dari 8 famili. dengan Shannon-Wiener H' = 1.83, Evennes = 0.83, dan indeks Dominansi = 0.20. Jenis yang ditemukan tidak termasuk pada jenis-jenis yang dilindungi di Indonesia, seluruh jenis yang ditemukan di lokasi penelitian tidak ada yang termasuk dalam daftar jenis langka atau terancam punah oleh IUCN. Hasil analisis regresi variabel temperatur pengaruh negatif yang signifikan berpengaruh pada kehadiran gastropoda, sedangkan variabel kelembaban terhadapnya pengaruh positif yang tidak signifikan berpengaruh pada kehadiran gastropoda.
Kata kunci : Gastropoda, Terrestrial, Tanjung Binerean.
Counseling and examination related to the prevention of hypertension and diabetes in the elderly
Authors: Mulyadi Mochtar Nova , Mubarak M. Zainun Syauqil
Published: September 2024

Aging brings various health challenges, including hypertension and diabetes mellitus, which can affect the quality of life of the elderly. This study aims to identify the prevalence of these two diseases in Kepatihan Village, Kaliwates District, Jember Regency, and evaluate the effectiveness of health education in managing them. Community service activities include initial examinations that show a high prevalence of hypertension and prediabetes among the elderly, with only a few having normal blood pressure and blood sugar levels. The program involves health examinations, disease prevention and control education, and re-examination two weeks after the education. The results showed that older adults with normal blood pressure increased from 3 to 8 people, and regular blood sugar levels increased from 5 to 21 people. A significant decrease in cases of prehypertension and diabetes indicates the success of the education in increasing participants' awareness and knowledge about managing their health. However, high initial health conditions and limited resources remain barriers. This program shows the effectiveness of education in reducing the prevalence of non-communicable diseases among the elderly but requires continued efforts to support more sustainable health improvements