bluuebunny/crossref_metadata_2025 huggingface dataset:
Multicultural Education in Interlanguage English Textbooks for Senior High School Students in Maroangin
Authors: Mustakim Mustakim , Lateh Nurisan
Published: July 2020

This study aims: (1) to describe and explain the multicultural education content in Interlanguage English textbooks of senior high school level, and (2) to describe and explain the quality of the multicultural education content in Interlanguage English textbooks of senior high school level. The form of this research was descriptive qualitative. The data sources in this study were Interlanguage English textbooks of senior high school in Maroangin and informants, namely the authors of the books analyzed. Data collection techniques using content analysis techniques, questionnaires, and in-depth interviews. Test the validity of the data with the theory and source triangulation techniques, while data analysis used interactive analysis techniques. Based on the results of the study it can be concluded that: (1) the contents of multicultural education in the analyzed Interlanguage English textbooks do not fully contain the dimensions of multicultural education. This was evident from the five dimensions that should have existed only three dimensions were raised, namely the dimensions of material integration, the dimension of reducing prejudice, as well as the dimensions of strengthening school culture and social structure. Whereas the other two dimensions, namely the dimension of knowledge construction and the dimension of adjustment of learning methods were not found in the textbook; (2) the quality of multicultural education content in the lessons is still very inadequate. This is because not all multicultural dimensions are integrated into the textbook.
International Community Service Program Model for Teacher Prospective Students at STKIP Muhammadiyah Enrekang
Authors: Mustakim Mustakim , Doloh Sukree , Busa Yunus
Published: July 2020

The research aimed to describe the implementation of the International Community Service Program which has been done at STKIP Muhammadiyah Enrekang. Specifically the research seeked to uncover: (1) The implementation of International Community Service Program which has been carried out so far; (2) The effectiveness of implementation International Community Service Program was seen from the responses of the stake holders and participants; and, (3) International Community Service Program model formulation for prospective teachers in STKIP Muhammadiyah Enrekang. For achieving these objectives, exploratory studies were carried out with an approach descriptive qualitative. The research involved STKIP Muhammadiyah Enrekang where stakeholders were the main respondents. Information in the field was explored using interview, analysis techniques documents, and questionnaire distribution. After the data was collected and processed. The research concludes as follows: (1) International Community Service Program is a program which important, therefore; even really needs to be done; and (2) International Community Service Program for prospective teachers in STKIP Muhammadiyah Enrekang based on the needs analysis in the field has unique characteristics of aspects: (a) duration of implementation: (b) destination country; (c) the amount of the fee needed; (d) the frequency of monitoring needed; (e) participants who involved; (f) parties involved, (f) activity management team, and (g) material required activities. Research recommends things following: (1) analyzing field requirements before the International Community Service Program implemented, (2) doing careful preparation, (c) doing reflection at each stage of implementation.
ANALISIS PRESTASI BELAJAR SISWA PELAJARAN EKONOMI, STATUS SOSIAL EKONOMI ORANG TUA DAN BIMBINGAN BELAJAR (STUDI PADA SMA NEGERI 10 KOTA TANGERANG)
Authors: Saepuloh Dadang
Published: July 2020

This study aims to determine the effect of parental socioeconomic status and tutoring on students' learning achievement of economic subjects in class XI of the social studies program at SMA 10 Tangerang. The sample in this study were 54 students in SMA 10 Tangerang. This research is ex-post facto research. The variables of this study are economic learning achievement, socioeconomic status, and tutoring. Data collection techniques use questionnaires and documentation. The analytical method used is multiple regression analysis. From the results of the study, the following conclusions are obtained: (1) socioeconomic status does not affect the learning achievement of Economics subjects which is indicated by a sig value of 0.184 more than 0.1. (2) learning guidance has an effect on economic learning achievement which is indicated by a sig value of 0.030 smaller than 0.1. (3) socioeconomic status and tutoring have a positive effect on economic learning achievement which is indicated by a sig value of 0.046 smaller than 0.1. R2 value of 0.113 means that 11.3% of the learning achievement of Economics subjects is explained by socioeconomic status and tutoring. While 88.7% is explained by other factors not examined in this study.
Government- Pulled Triple Helix for Supporting National Aircraft Industry in the Global Value Chain with Tipology Hierarchy
Authors: Ismail Muzakir Muhammad Athar
Published: July 2020

This study reconstructs the government- pulled triple helix for supporting national aircraft industry in the Global Value Chain (gvc) with tipology hierarchy. By employing Soft Systems Methodology (SSM), this research revealed that Triple Helix Model for development aircraft industry directed to design Macro Policy, revitalize test laboratories, strengthen aircraft financing policy, building supporting Industries and empower aerospace human resources. The government-pulled triple helix model has overlapping the role played by Academia (A), Busines (B), and Government (G) in the development of the aircraft industry. In fact, according to Etkowitz, H. (2008) that overlapping of role only occurs in university pushed triple helix model. In addition, the configuration of actor G in  the triple helix needed for development national aircraft industry is not generic but based on specific context. In aircraft development, especially for strengthening the aerospace industry cluster, the role of association is also important. In the GVC of Aircraft Industry with typology of hierarchy, PT DI is required to be able to build networks with industry partners, domestic and foreign research institutions and aircraft component industry associations. The Government will obtain lesson learnt on how the strategy for supporting the national aircrafts development such as program of N 219, N 245 or R 80 which developed at present.
LECTURER QUALITY EMPOWERMENT STRATEGY IN REALIZING NATIONAL EDUCATION OBJECTIVES
Authors: Asmawi Muhammad Rosul
Published: July 2020

This study aims to find out the position and role of lecturers in carrying out the task of implementing the national education system and realizing the goals of national education. Lecturers are one of the determinants of the quality of education. The success of the implementation of higher education is largely determined by the readiness of the lecturer in preparing their students through teaching and learning activities or the learning process. The strategic position of lecturers to improve the quality of educational outcomes is strongly influenced by professional abilities in teaching and their level of welfare. To realize this; then the strategy of empowering lecturers is needed in order to realize professionalism that can be accounted for. The empowerment strategy implemented will be able to raise the dignity and level, improve the quality of learning, improve the quality of national education and provide quality services. Empowerment of lecturers is intended to create a work atmosphere or climate that leads to the development of potential, empowerment, and protection.
HUBUNGAN ANTARA KEPEMIMPINAN, MOTIVASI KERJA DAN KOMITMEN ORGANISASI DENGAN DISIPLIN KERJA APARATUR SIPIL NEGARA
Authors: Wahyudin Irmansyah , Dahlan Jarnawi Afgani , Mulyadi Edi
Published: July 2020

Tujuan dari penelitian ini adalah untuk mengetahui hubungan antara Kepemimpinan, Motivasi Kerja dan Komitmen Organisasi dengan Disiplin Kerja Aparatur Sipil Negara Kecamatan di Kota Tangerang. Penelitian ini menggunakan metode kuantitatif dengan penelitian survey untuk menjawab rumusan masalah dan membuktikan hipotesis penelitian yang diajukan, adapun instrumen penelitiannya berbentuk kuesioner yang dibangun dari penjabaran indikator – indikator tiap variabel dengan alat ukur skala Likert. Populasi penelitian ini adalah Aparatur Sipil Negara di 13 Kecamatan di Kota Tangerang yang berjumlah 920 orang, adapun penentuan sampel penelitian sebanyak 90 orang dengan menggunakan tehnik cluster sampling yang diukur secara statistika menggunakan rumus Slovin. Sebelum dilakukan analisis, instrumen diuji validitas dan realibilitasnya. Teknik analisis yang digunakan dalam penelitian ini meliputi teknik analisis korelasi pearson product moment, analisis korelasi berganda, analisis koefisien determinasi dan teknik analisis regresi sederhana dan regresi berganda. Hasil pengujian hipotesis dari penelitian ini menyatakan bahwa terdapat hubungan signifikan secara statistik antara kepemimpinan dengan disiplin kerja ASN Kecamatan di Kota Tangerang yang positif sebesar 0,727. Terdapat hubungan signifikan secara statistik antara motivasi kerja dengan disiplin kerja ASN Kecamatan di Kota Tangerang yang positif sebesar 0,842. Terdapat hubungan signifikan secara statistik antara komitmen organisasi dengan disiplin kerja ASN Kecamatan di Kota Tangerang yang positif sebesar 0,660. Terdapat hubungan signifikan secara statistik antara kepemimpinan, motivasi kerja dan komitmen organisasi secara bersama - sama dengan disiplin kerja ASN Kecamatan di Kota Tangerang yang positif sebesar 0,889.
PENINGKATAN KOMITMEN TUGAS TERHADAP KOMPETENSI PEDAGOGIK GURU MELALUI PERAN PENGAWAS SEKOLAH DAN KEPALA SEKOLAH DI SMA NEGERI 7 KOTA TANGERANG
Authors: Hikmat Hikmat
Published: July 2020

Penelitian Tindakan Sekolah ini mempunyai tujuan untuk meningkatkan kompetensi pedagogik guru melalui peran pengawas dan kepala sekolah di SMA Negeri 7 Kota Tangerang. Penelitian Tindakan Sekolah ini terdiri dari 2 siklus, dan tiap siklus terdiri dari 4 tahapan yaitu perencanaan, pelaksanaan, observasi dan refleksi. Adapun indikator keberhasilan adalah penelitian ini dikatakan berhasil jika terjadi peningkatan hasil skor rata-rata komitmen tugas minimal 80 % dengan kategori tinggi dan kompetensi pedagogik minimal 65 % guru rata-rata mencapai kriteria amat baik. Hasil penelitian menunjukkan bahwa: 1) terjadi komitmen tugas dengan nilai rata-rata 74,41 termasuk pada kategori sedang pada siklus pertama dan pada siklus kedua mencapai nilai rata-rata 81,93 termasuk pada kategori tinggi. 2) Aktivitas guru dalam mengikuti workshop penyusunan RPP yang lengkap dan Kompetensi pedagogik guru dengan nilai rata-rata 65,4 % yaitu 11 orang atau 22 % guru dengan kriteria amat baik, 32 orang atau 64 % dengan kategori baik dan 7 orang atau 14 % dengan kategori cukup pada siklus pertama dan meningkat pada siklus kedua mencapai nilai rata-rata 73,2 % dengan 35 orang atau 70 % guru dengan kriteria amat baik, 15 orang atau 30 % dengan kategori baik. Berdasarkan hasil penelitian ini penulis memberikan saran kepada guru SMA Negeri 7 Kota Tangerang agar dapat melibatkan diri dalam kegiatan MGMP sehingga dapat meningkatkan kompetensi pedagogik guru dalam mengajar di kelas dan untuk kepala sekolah agar memfasilitasi guru yang jadi bawahannya untuk aktif dalam kegiatan MGMP guna meningkatkan kompetensi pedagogiknya.Kata Kunci: Komitmen Tugas, Kompetensi Pedagogik
Göreve İlişkin Sırrın Açıklanması Suçu
Authors: ÖZEN Muharrem , KÖKSAL Atacan
Published: July 2020

Kamu görevlileri, görevlerinin bir parçası olarak işlemleri yerine getirirken kamu idaresine ait olan ve gizli kalması gereken pek çok bilgiye de vakıf olmaktadırlar. Bu durum, onların görevlerinin ve bulundukları konumun doğal bir sonucudur. İşte bu nedenle kamu görevlilerinin, görevleri dolayısıyla öğrendikleri gizli kalması gereken bilgileri saklama yükümlülüğü öngörülmüştür. Söz konusu yükümlülüğe aykırı nitelikteki davranışlar ise 5237 sayılı TCK’nın 258. maddesinde cezai açıdan yaptırıma bağlanmıştır. Kamu görevlilerinin kamu idaresine karşı olan sadakat borcuna uygun biçimde davranması ile birlikte kamu idaresinin güvenilirliği ve işleyiş düzeni teminat altına alınmıştır. Bu çalışmada göreve ilişkin sırrın açıklanması suçu unsurlarıyla birlikte ele alınacak, bu suçun benzer suçlarla olan farkları incelenecektir. Ayrıca Türk Hukuku’nda verilmiş yargı kararları ile birlikte İCK’daki düzenlemeler ve İtalyan Hukuku’ndaki görüşler göz önünde bulundurularak açıklamalarda bulunulacaktır.
Penggunaan Alat Kontrasepsi Suntik dan Gangguan Perdarahan Menstruasi pada Akseptor KB di Puskesmas Tompobulu
Authors: Taqiyah Yusrah , Jama Fatma , Hasraeni Hasraeni
Published: July 2020

Hormonal contraception has several side effects namely nausea, headache, mammary pain, fluor albus, weight gain, hyporeorrhea found in the use of pill contraception. Whereas the use of injection contraception often causes irregular bleeding (spotting), and amenorrhoea. The purpose of this study is to determine the relationship between the use of injection contraception contraception with menstrual bleeding disorders in family planning acceptors at Tompobulu Health Center, Gowa Regency. The research design used was cross-sectional. The sample in this study were 101 family planning acceptors, selected using purposive sampling. Data were collected using questionnaire, then analyzed using Fisher's exact test. The results showed that there was a significant relationship between the use of injection contraception and spotting, with p-value of 0.007 and there was no significant relationship between the use of injection contraception contraception with menorrhagia, with p-value of 1.000.

Keywords: injecting contraception; spotting; menorrhagia

ABSTRAK

Kontrasepsi hormonal memiliki beberapa efek samping yaitu rasa mual, sakit kepala, nyeri pada mammae, fluor albus, kenaikan berat badan, hipomenorea terdapat pada penggunaan kontrasepsi pil. Sedangkan pada pemakaian kontrasepsi suntik sering menimbulkan perdarahan yang tidak teratur (spotting), dan amenorea Tujuan dari penelitian ini adalah untuk mengetahui hubungan pemakaian alat kontrasepsi suntik dengan gangguan perdarahan menstruasi pada akseptor keluarga berencana di Puskesmas Tompobulu Kabupaten Gowa. Desain penelitian yang digunakan adalah cross-sectional. Sampel dalam penelitian ini adalah 101 akseptor keluarga berencana, yang dipilih dengan teknik purposive sampling. Data dikumpulkan menggunakan kuesioner, lalu dianalisis menggunakan Fisher’s exact test. Hasil penelitian menunjukkan bahwa ada hubungan yang signifikan antara pemakaian alat kontrasepsi suntik dengan spotting dengan nilai p 0,007 dan tidak ada hubungan yang signifikan antara pemakaian alat kontrasepsi suntik dengan menoragia, dengan nilai p 1,000.

Kata kunci: kontrasepsi suntik; spotting; menorrhagia
Dukungan Penghargaan Keluarga Berhubungan dengan Kualitas dan Kepuasan Hidup Lansia di Depok
Authors: Rekawati Etty , Sahar Junaiti , Wati Dwi Nurviyandari Kusuma
Published: July 2020

The transition of elderly lives from productive periods to non-productive makes them need support from relatives, friends or family. The purpose of this study was to look at the relationship between family appreciation support with quality and life satisfaction of the elderly in the city of Depok, West Java, with a cross-sectional design. The subjects of this study were 135 elderly people> 60 years old, living with family, do not have infectious diseases, able to communicate in Indonesian; selected by purposive sampling technique. Data were analyzed using Chi square test. The results of the study indicate that there was a relationship between family appreciation support with the quality of life of the elderly (p-value = 0.022) and life satisfaction of the elderly (p-value = 0.014). The results of this study are expected to support the development of nursing science in the future, especially regarding the quality and satisfaction of life of the elderly.

Keywords: elderly; award support; quality of life; life satisfaction

ABSTRAK

Transisi kehidupan lansia dari masa produktif menjadi non produktif membuat mereka memerlukan dukungan dari kerabat, teman atau keluarga. Tujuan penelitian ini adalah untuk melihat hubungan antara dukungan penghargaan keluarga dengan kualitas dan kepuasan hidup lansia di Kota Depok, Jawa Barat, dengan desain cross-sectional. Subyek penelitian ini adalah 135 lansia yang berusia >60 tahun, tinggal bersama keluarga, tidak memiliki penyakit menular, mampu berkomunikasi dengan bahasa Indonesia; yang dipilih dengan teknik purposive sampling. Data dianalisis menggunakan uji Chi square. Hasil peneltian menunjukkan bahwa ada hubungan antara dukungan penghargaan keluarga dengan kualitas hidup lansia (p-value = 0,022) dan kepuasan hidup lansia (p-value = 0,014). Hasil penelitian ini diharapkan dapat mendukung perkembangan ilmu keperawatan di masa mendatang, khususnya tentang kualitas dan kepuasan hidup lansia.

Kata kunci: lansia; dukungan penghargaan; kualitas hidup; kepuasan hidup
Effects of Daily Light Integral and LED Spectrum on Growth and Nutritional Quality of Hydroponic Spinach
Authors: Gao Wei , He Dongxian , Ji Fang , Zhang Sen , Zheng Jianfeng
Published: July 2020

To achieve clean and high-quality spinach production, the effects of daily light integral (DLI) and light spectrum on growth, nutritional quality, and energy yield of hydroponic spinach (Spinacia oleracea L.) were investigated in a closed plant factory under light-emitting diode (LED) lighting. The hydroponic spinach plants were grown under 16 combinations of four levels of DLI (11.5, 14.4, 17.3, and 20.2 mol m−2 day−1) with four light spectra: LED lamps with ratio of red light to blue light (R:B ratio) of 0.9, 1.2, and 2.2 and fluorescent lamps with R:B ratio of 1.8 as control. The results show that total fresh and dry weights, energy yield, and light energy use efficiency (LUE) of harvested spinach were higher under D17.3-L1.2 treatment compared to other treatments. The higher net photosynthetic rates were shown at DLI of 17.3 mol m−2 day−1 regardless of light quality. Higher vitamin C contents of spinach in all LED treatments were obtained compared with the control. L1.2 treatments with higher fraction of blue light led to more vitamin C content, lower nitrate content, and higher LUE independent of DLI. L2.2 treatment with more fraction of red light was beneficial to reduce oxalate accumulation. Power consumption based on increased total fresh weight under LED lamps with R:B ratio of 1.2 in different DLIs was over 38% lower than that under the fluorescent lamps and 1.73 kWh per 100 g FW at DLI of 17.3 mol m−2 day−1. In conclusion, lighting environment in DLI of 17.3 mol m−2 day−1 using LED lamps with R:B ratio of 1.2 is suggested for the design of a LED plant factory for hydroponic spinach production.
Isolate-Dependent Inheritance of Resistance Against Pseudoperonospora cubensis in Cucumber
Authors: Chen Tomer , Katz Daniel , Ben Naim Yariv , Hammer Rivka , Ben Daniel Bat Hen , Rubin Avia E. , Cohen Yigal
Published: July 2020

Six wild accessions of Cucumis sativum were evaluated for resistance against each of the 23 isolates of the downy mildew oomycete Pseudoperonospora cubensis. The isolates originated from Israel, Europe, USA, and Asia. C. sativum PI 197088 (India) and PI 330628 (Pakistan) exhibited the highest level of resistance against multiple isolates of P. cubensis. Resistance was manifested as reduced lesion number, lesion size, sporangiophores and sporangia per lesion and enhanced encasement of haustoria with callose and intensive accumulation of lignin in lesions of both Plant Introductions (PIs) compared to the susceptible C. sativum SMR-18. In the field, much smaller AUDPC (Area Under Disease Progress Curve) values were recorded in PI 197088 or PI 330628 as compared to SMR-18. Each PI was crossed with SMR-18 and offspring progeny plants were exposed to inoculation with each of several isolates of P. cubensis in growth chambers and the field during six growing seasons. F1 plants showed partial resistance. F2 plants showed multiple phenotypes ranging from highly susceptible (S) to highly resistant (R, no symptoms) including moderately resistant (MR) phenotypes. The segregation ratio between phenotypes in growth chambers ranged from 3:1 to 1:15, depending on the isolate used for inoculation, suggesting that the number of genes, dominant, partially dominant, or recessive are responsible for resistance. In the field, the segregation ratio of 1:15, 1:14:1, or 1:9:6 was observed. F2 progeny plants of the cross between the two resistant PI’s were resistant, except for a few plants that were partially susceptible, suggesting that some of the resistance genes in PI 197088 and PI 330328 are not allelic.
CO2 Emissions from Soil Under Fodder Maize Cultivation
Authors: Sosulski Tomasz , Szymańska Magdalena , Szara Ewa
Published: July 2020

The paper presents the results of a study aimed at assessing the total respiration of arable soil under maize fodder cultivation in the climate conditions of Central Poland over the dry growing season. The study was carried out between 22 April and 30 September 2012 (24 test dates). Total CO2-C emissions from the soil were measured in situ by means of the chamber method. The measured total CO2-C fluxes showed a high variability over the study period (3.63–302.31, mean 84.58 mg CO2-C m−2 h−1). Cumulative CO2-C soil emissions reached 3214.9 kg CO2-C ha−1 during the maize growing season and 106.8 kg CO2-C ha−1 in the post-harvest month. In the specific weather conditions of the year of the study (summer drought), CO2-C fluxes from the soil were stronger correlated with the soil NO3−-N content than with atmospheric temperature and soil moisture. The relationship between total soil CO2-C emissions and soil NH4+-N content was described by a negative correlation. Intensive CO2-C fluxes from the soil coincided with rapid maize development stages (8–15 leaf stage) and, to a lower extent, with earlier leave development stages. Total CO2-C emissions during the emergence, pre-reproductive and reproductive maize stages and, particularly, in the post-harvest period, were lower. Intensive nitrification of the soil, in dry season such as the one of 2012, could serve as an indicator of high CO2-C emissions from the soil. However, further studies are needed to confirm this finding. Decomposers probably used soil NH4+-N in the organic matter degradation process intensively and could compete with nitrifiers and maize roots for this soil source of mineral nitrogen.
Chemical Composition of Cynara Cardunculus L. var. altilis Heads: The Impact of Harvesting Time
Authors: Mandim Filipa , Petropoulos Spyridon A. , Fernandes Ângela , Santos-Buelga Celestino , Ferreira Isabel C. F. R. , Barros Lillian
Published: July 2020

Cardoon is a multi-purpose crop with several industrial applications, while the heads (capitula) are edible and commonly used in various dishes of the Mediterranean diet. Several reports in the literature study the chemical composition of the various plants parts (leaves, flower stalks, bracts, seeds) aiming to industrial applications of crop bio-waste, whereas for the heads, most of the studies are limited to the chemical composition and bioactive properties at the edible stage. In the present study, cardoon heads were collected at six different maturation stages and their chemical composition was evaluated in order to determine the effect of harvesting stage and examine the potential of alternative uses in the food and nutraceutical industries. Lipidic fraction and the content in fatty acids, tocopherols, organic acids, and free sugars were determined. Lipidic content decreases with the maturation process, while 22 fatty acids were detected in total, with palmitic, oleic, and linoleic acids being those with the highest abundance depending on harvesting time. In particular, immature heads have a higher abundance in saturated fatty acids (SFA), whereas the samples of mature heads were the richest in monounsaturated fatty acids (MUFA). The α-tocopherol was the only isoform detected being present in higher amounts in sample Car B (619 µg/100 g dw). Oxalic, quinic, malic, citric and fumaric acids were the detected organic acids, and the higher content was observed in sample Car E (15.7 g/100 g dw). The detected sugars were fructose, glucose, sucrose, trehalose and raffinose, while the highest content (7.4 g/100 g dw) was recorded in sample Car C. In conclusion, the maturation stage of cardoon heads influences their chemical composition and harvesting time could be a useful means to increase the quality and the added value of the final product by introducing this material in the food and nutraceutical industries.
Mechanical Pruning and Soil Fertilization with Distinct Organic Amendments in Vineyards of Syrah: Effects on Vegetative and Reproductive Growth
Authors: Botelho Manuel , Cruz Amândio , Ricardo-da-Silva Jorge , de Castro Rogério , Ribeiro Henrique
Published: July 2020

The effects of fully mechanized pruning systems on physiology, vigor and yield of grapevines have been studied for more than forty years and are an interesting way to reduce production costs. Organic amending of vineyard soil is a way to increase vine productivity. Thus, this study aims to understand the effects of the interaction between these two practices, on vine growth and productivity. Two trial fields were implemented on Shiraz vineyards in 2 different wine regions. Mechanical hedge pruning was compared with hand spur pruning and four different organic amendments were tested: biochar; municipal solid waste compost; cattle manure; sewage sludge. Mechanical pruning and organic amendments, by themselves, did not significantly increase yield. However, the interaction between both factors reduced the impact of self-regulation mechanisms (budburst, bud fruitfulness and cluster weight) in mechanical pruning and successfully increased yield, without decreasing vegetative growth. The effects of mechanical pruning with the application of organic amendments to soil on yield is significant and, thereby, the choice of the organic amendment and its amount, must be done considering the destiny of produced grapes.
Enhanced Artificial Neural Network with Harris Hawks Optimization for Predicting Scour Depth Downstream of Ski-Jump Spillway
Authors: Sammen Saad Sh. , Ghorbani Mohammad Ali , Malik Anurag , Tikhamarine Yazid , AmirRahmani Mohammad , Al-Ansari Nadhir , Chau Kwok-Wing
Published: July 2020

A spillway is a structure used to regulate the discharge flowing from hydraulic structures such as a dam. It also helps to dissipate the excess energy of water through the still basins. Therefore, it has a significant effect on the safety of the dam. One of the most serious problems that may be happening below the spillway is bed scouring, which leads to soil erosion and spillway failure. This will happen due to the high flow velocity on the spillway. In this study, an alternative to the conventional methods was employed to predict scour depth (SD) downstream of the ski-jump spillway. A novel optimization algorithm, namely, Harris hawks optimization (HHO), was proposed to enhance the performance of an artificial neural network (ANN) to predict the SD. The performance of the new hybrid ANN-HHO model was compared with two hybrid models, namely, the particle swarm optimization with ANN (ANN-PSO) model and the genetic algorithm with ANN (ANN-GA) model to illustrate the efficiency of ANN-HHO. Additionally, the results of the three hybrid models were compared with the traditional ANN and the empirical Wu model (WM) through performance metrics, viz., mean absolute error (MAE), root mean square error (RMSE), coefficient of correlation (CC), Willmott index (WI), mean absolute percentage error (MAPE), and through graphical interpretation (line, scatter, and box plots, and Taylor diagram). Results of the analysis revealed that the ANN-HHO model (MAE = 0.1760 m, RMSE = 0.2538 m) outperformed ANN-PSO (MAE = 0.2094 m, RMSE = 0.2891 m), ANN-GA (MAE = 0.2178 m, RMSE = 0.2981 m), ANN (MAE = 0.2494 m, RMSE = 0.3152 m) and WM (MAE = 0.1868 m, RMSE = 0.2701 m) models in the testing period. Besides, graphical inspection displays better accuracy of the ANN-HHO model than ANN-PSO, ANN-GA, ANN, and WM models for prediction of SD around the ski-jump spillway.
The Efficiency of Social Network Services Management in Organizations. An In-Depth Analysis Applying Machine Learning Algorithms and Multiple Linear Regressions
Authors: Matosas-López Luis , Romero-Ania Alberto
Published: July 2020

The objective of this work is to detect the variables that allow organizations to manage their social network services efficiently. The study, applying machine learning algorithms and multiple linear regressions, reveals which aspects of published content increase the recognition of publications through retweets and favorites. The authors examine (I) the characteristics of the content (publication volumes, publication components, and publication moments) and (II) the message of the content (publication topics). The research considers 21,771 publications and thirty-nine variables. The results show that the recognition obtained through retweets and favorites is conditioned both by the characteristics of the content and by the message of the content. The recognition through retweets improves when the organization uses links, hashtags, and topics related to gender equality, whereas the recognition through favorites increases when the organization uses original tweets, publications between 8:00 and 10:00 a.m. and, again, gender equality related topics. The findings of this research provide new knowledge about trends and patterns of use in social media, providing academics and professionals with the necessary guidelines to efficiently manage these technologies in the organizational field.
Bearing Health Monitoring Using Relief-F-Based Feature Relevance Analysis and HMM
Authors: Hernández-Muriel José Alberto , Bermeo-Ulloa Jhon Bryan , Holguin-Londoño Mauricio , Álvarez-Meza Andrés Marino , Orozco-Gutiérrez Álvaro Angel
Published: July 2020

Nowadays, bearings installed in industrial electric motors are constituted as the primary mode of a failure affecting the global energy consumption. Since industries’ energy demand has a growing tendency, interest for efficient maintenance in electric motors is decisive. Vibration signals from bearings are employed commonly as a non-invasive approach to support fault diagnosis and severity evaluation of rotating machinery. However, vibration-based diagnosis poses a challenge concerning the signal properties, e.g., highly dynamic and non-stationary. Here, we introduce a knowledge-based tool to analyze multiple health conditions in bearings. Our approach includes a stochastic feature selection method, termed Stochastic Feature Selection (SFS), highlighting and interpreting relevant multi-domain attributes (time, frequency, and time–frequency) related to the bearing faults discriminability. In particular, a relief-F-based ranking and a Hidden Markov Model are trained under a windowing scheme to achieve our SFS. Obtained results in a public database demonstrate that our proposal is competitive compared to state-of-the-art algorithms concerning both the number of features selected and the classification accuracy.
Combined kNN Classification and Hierarchical Similarity Hash for Fast Malware Detection
Authors: Choi Sunoh
Published: July 2020

Every day, hundreds of thousands of new malicious files are created. Existing pattern-based antivirus solutions have difficulty detecting these new malicious files. Artificial intelligence (AI)–based malware detection has been proposed to solve the problem; however, it takes a long time. Similarity hash–based detection has also been proposed; however, it has a low detection rate. To solve these problems, we propose k-nearest-neighbor (kNN) classification for malware detection with a vantage-point (VP) tree using a similarity hash. When we use kNN classification, we reduce the detection time by 67% and increase the detection rate by 25%. With a VP tree using a similarity hash, we reduce the similarity-hash search time by 20%.
Preparing High-Purity Anhydrous ScCl3 Molten Salt Using One-Step Rapid Heating Process
Authors: Xiao Junhui , Chen Chao , Ding Wei , Peng Yang , Zou Kai , Chen Tao , Zou Zhiwei
Published: July 2020

In this study, a one-step rapid heating novel process was used to prepare high-purity anhydrous scandium chloride molten salt with low-purity scandium oxide. High-purity anhydrous ScCl3 molten salt was used as the Sc-bearing raw material for preparing the Sc-bearing master alloy. Inert gas was used to enhance the purity of anhydrous scandium chloride and reduce the hydrolysis rate of scandium. The results show that high-purity scandium chloride (purity, 99.69%) with the scandium content of 29.61%, was obtained, and the hydrolysis rate of scandium was 1.19% under the conditions used: removing ammonium chloride; residual crystal water temperature of 400 °C; m(Sc2O3):m(NH4Cl) = 1:2.5; holding-time of 90 min; heating-rate of 12 °C/min; and argon flow of 7.5 L/min. XRD, SEM, and EPMA analyses further verified that anhydrous scandium chloride crystallization condition was relatively good and the purity of high-purity anhydrous scandium chloride approached the theory purity of anhydrous scandium chloride.
Leaf Image Recognition Based on Bag of Features
Authors: Zhang Yaonan , Cui Jing , Wang Zhaobin , Kang Jianfang , Min Yufang
Published: July 2020

Plants are ubiquitous in human life. Recognizing an unknown plant by its leaf image quickly is a very interesting and challenging research. With the development of image processing and pattern recognition, plant recognition based on image processing has become possible. Bag of features (BOF) is one of the most powerful models for classification, which has been used for many projects and studies. Dual-output pulse-coupled neural network (DPCNN) has shown a good ability for texture features in image processing such as image segmentation. In this paper, a method based on BOF and DPCNN (BOF_DP) is proposed for leaf classification. BOF_DP achieved satisfactory results in many leaf image datasets. As it is hard to get a satisfactory effect on the large dataset by a single feature, a method (BOF_SC) improved from bag of contour fragments is used for shape feature extraction. BOF_DP and LDA (linear discriminant analysis) algorithms are, respectively, employed for textual feature extraction and reducing the feature dimensionality. Finally, both features are used for classification by a linear support vector machine (SVM), and the proposed method obtained higher accuracy on several typical leaf datasets than existing methods.
Effects of Inspiratory Muscles Training Plus Rib Cage Mobilization on Chest Expansion, Inspiratory Accessory Muscles Activity and Pulmonary Function in Stroke Patients
Authors: Park Shin Jun
Published: July 2020

After stroke, limited ribcage movement may lead to impaired respiratory function. Combining threshold inspiratory muscle training with rib cage joint mobilization has been shown to enhance the recovery of respiratory function in patients with stroke. The present study investigated whether the combination of rib cage joint mobilization and inspiratory muscle training would improve chest expansion, inspiratory muscle activity, and pulmonary function after stroke. Thirty stroke patients were recruited and randomly assigned to one of the two groups, namely 6-week rib cage joint mobilization with inspiratory muscle training (experimental group) or inspiratory muscle training alone (control group). Outcome measures included upper and lower chest expansion, activity of accessory inspiratory muscles (latissimus dorsi (LD) and upper trapezius (UT)), and pulmonary function (forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), and peak expiratory flow (PEF)). All evaluations were conducted at baseline and after 6 weeks of inspiratory muscle training. Significant increases were observed in upper and lower chest expansion, LD and UT muscle activity, FVC, FEV1, and PEF in both the groups. Upper and lower chest expansion and muscle activity of UT and LD were significantly higher in the experimental group than in the control group. No significant differences were observed in FVC, FEV1, and PEF between the groups. Inspiratory muscle training is effective in improving chest expansion, inspiratory muscle activity, and pulmonary function after stroke. The addition of rib cage joint mobilization further increases chest expansion and inspiratory muscle activity.
Cork Core Sandwich Plates for Blast Protection
Authors: Pernas-Sánchez Jesús , Artero-Guerrero Jose A. , Varas David , Teixeira-Dias Filipe
Published: July 2020

A numerical model is developed and validated to analyse the performance of aluminium skin and agglomerated cork core sandwich plates subjected to blast loads. Two numerical approaches are used and thoroughly compared to generate the blast loading: an Arbitrary-Lagrangian–Eulerian approach and the Load Blast Enhanced method. Both of the models are validated by comparing the numerical results with experimental observations. A detailed analysis of the sandwich behaviour is done for both approaches showing small differences regarding the mechanical response of the sandwich structure. The results obtained from the numerical models uncover the specific energy absorption mechanisms happening within the sandwich plate components. A new core topology is proposed, based on these results, which maximises the energy absorption capacity of the plate, keeping the areal density unchanged. A wavy agglomerated cork core is proposed and the effects of different geometrical parameters on the energy absorption are thoroughly analysed and discussed. The proposed optimised plate configuration shows an increase in the total absorbed energy of close to 40% relative to a reference case with the same areal density. The adopted optimisation methodology can be applied to alternative configurations to increase the performance of sandwich structures under blast events.
Computer-Aided Surgical Simulation for Correcting Complex Limb Deformities in Children
Authors: Frizziero Leonardo , Santi Gian Maria , Liverani Alfredo , Napolitano Francesca , Papaleo Paola , Maredi Elena , Gennaro Giovanni Luigi Di , Zarantonello Paola , Stallone Stefano , Stilli Stefano , Trisolino Giovanni
Published: July 2020

This work aims to present an in-house low-cost computer-aided simulation (CASS) process that was recently implemented in the preoperative planning of complex osteotomies for limb deformities in children. Five patients admitted to the Unit of Paediatric Orthopaedics and Traumatology from April 2018 to December 2019, for correcting congenital or post-traumatic limb deformities were included in the study. Three-dimensional (3D) digital models were generated from Computed Tomography (CT) scans, using free open-source software, and the surgery was planned and simulated starting from the 3D digital model. 3D printed sterilizable models were fabricated using a low-cost 3D printer, and animations of the operation were generated with the aim to accurately explain the operation to parents. All procedures were successfully planned using our CASS method and the 3D printed models were used during the operation, improving the understanding of the severely abnormal bony anatomy. The surgery was precisely reproduced according to CASS and the deformities were successfully corrected in four cases, while in one case, the intraoperative intentional undersizing of the bone osteotomy produced an incomplete correction of a congenital forearm deformity. Our study describes the application of a safe, effective, user-friendly, and low-cost CASS process in paediatric orthopaedics (PO) surgery. We are convinced that our study will stimulate the widespread adoption of this technological innovation in routine clinical practice for the treatment of rare congenital and post-traumatic limb deformities during childhood.
Numerical Simulation of Cavitation Erosion Aggressiveness Induced by Unsteady Cloud Cavitation
Authors: Geng Linlin , Chen Jian , De La Torre Oscar , Escaler Xavier
Published: July 2020

A numerical investigation of the erosion aggressiveness of leading edge unsteady cloud cavitation based on the energy balance approach has been carried out to ascertain the main damaging mechanisms and the influence of the free stream flow velocity. A systematic approach has permitted the determination of the influence of several parameters on the spatial and temporal distribution of the erosion results comprising the selection of the cavitation model and the collapse driving pressure. In particular, the Zwart, Sauer and Kunz cavitation models have been compared as well as the use of instantaneous versus average pressure values. The numerical results have been compared against a series of experimental results obtained from pitting tests on copper and stainless steel specimens. Several cavitation erosion indicators have been defined and their accuracy to predict the experimental observations has been assessed and confirmed when using a material-dependent damaging threshold level. In summary, the use of the average pressure levels during a sufficient number of simulated shedding cycles combined with the Sauer cavitation model are the recommended parameters to achieve reliable results that reproduce the main erosion mechanisms found in cloud cavitation. Moreover, the proposed erosion indicators follow a power law as a function of the free stream flow velocity with exponents ranging from 3 to 5 depending on their definition.
Investigation of the Maturity Changes of Cherry Tomato Using Magnetic Resonance Imaging
Authors: Baek Seunghoon , Lim Jongguk , Lee Jun Gu , McCarthy Michael J. , Kim Seong Min
Published: July 2020

The maturity of tomato fruit is normally characterized by external color, and it is often difficult to know when fruit have achieved commercial maturity or become over-mature. The internal structure of tomato fruit changes during development and this study investigates the utility of nondestructive measurement of tomato fruit structure as a function of maturity using magnetic resonance imaging (MRI). The objective of this work is to use analysis of internal tomato fruit structural measurements to characterize maturity. Intact cherry tomato fruit were harvested at six different maturity stages. At each stage of maturity, the internal structure of the fruit was measured using a series of two-dimensional (2D) magnetic resonance (MR) images. Qualitative and quantitative image analyses were performed to correlate internal fruit structure with maturity. Internal structural changes observed in the pericarp region of the tomato fruit are highly correlated with fruit maturity. MR image information combined with classical analysis techniques provides a more complete understanding of structure and physicochemical changes in tomato fruit during maturation. This study demonstrates that MRI is a useful analytical tool to characterize internal changes in agricultural produce as the produce matures. This technique can be applied to almost any agricultural produce to monitor internal physical changes due to external impact, maturity stage, variation in climate, storage time, and condition, or other factors impacting quality.
Alkali Activated Paste and Concrete Based on of Biomass Bottom Ash with Phosphogypsum
Authors: Vaičiukynienė Danutė , Nizevičienė Dalia , Kantautas Aras , Bocullo Vytautas , Kielė Andrius
Published: July 2020

There is a growing interest in the development of new cementitious binders for building construction activities. In this study, biomass bottom ash (BBA) was used as aluminosilicate precursor and phosphogypsum (PG) was used as a calcium source. The mixtures of BBA and PG were activated with the sodium hydroxide solution or the mixture of sodium hydroxide solution and sodium silicate hydrate solution. Alkali activated binders were investigated using X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM) test methods. The compressive strength of hardened paste and fine-grained concrete was also evaluated. After 28 days, the highest compressive strength reached 30.0 MPa—when the BBA was substituted with 15% PG and activated with NaOH solution—which is 14 MPa more than control sample. In addition, BBA fine-grained concrete samples based on BBA with 15% PG substitute activated with NaOH/Na2SiO3 solution showed higher compressive strength compered to when NaOH activator was used −15.4 MPa and 12.9 MPa respectfully. The NaOH/Na2SiO3 activator solution resulted reduced open porosity, so potentially the fine-grained concrete resistance to freeze and thaw increased.
Stabilization of Sand with Colloidal Nano-Silica Hydrosols
Authors: Ghadr Soheil , Assadi-Langroudi Arya , Hung Ching , O’Kelly Brendan C. , Bahadori Hadi , Ghodsi Taher
Published: July 2020

Colloidal nano-silica (NS) hydrosols are electrochemically stabilized, polymerized amorphous silica in low viscosity solutions, and in the form of hydrated gels, silica globules or pellicles. Compared to applications in concrete technology, the use of silica-based binders for groundwork applications has received little attention. Silica-based hydrosols impose no known direct risks to humans and are generally courteous to the soil health and ecosystem service functions. Their localized impact on microorganisms however needs to be further investigated. To this end, NS hydrosols have a scope for use as an alternative low-viscose material in groundworks. The current understanding of interactions between NS hydrosols and soil (sand) is, however, confused by the limited availability of experimental evidence concerning undrained static flow and large strain behavior. The contributions, presented in this paper, advance the knowledge through experimental testing, molecular modelling, and micro-analytical measurements. Four grades of colloidal NS (1–15 wt.%) were synthesized for grouting medium-dense sub-angular fine siliceous sand specimens. Consolidated-undrained triaxial compression testing was performed on the base and treated sand for isotropic consolidation over the effective stress range 100–400 kPa. Overall, silica impregnation produced improvements in yield and residual undrained shear strengths, restricted unwelcomed impacts of excess pore water pressure, and led to the formation of generally more dilative, strain-hardening behavior. Steady states and static flow potential indices are also studied as functions of confinement level and viscosity of the NS grout.