bluuebunny/crossref_metadata_2025_split huggingface dataset:
Miskonsepsi Siswa dalam Memahami Konsep Nilai Tempat Bilangan Dua Angka
Authors: Matitaputty Christi 
Published: May 2024

Konsep-konsep matematika yang diberikan pada tingkat Sekolah Dasar merupakan konsep dasar yang berguna untuk pemahaman matematika di tingkat selanjutnya. Adanya miskonsepsi membuat pembelajaran menjadi tidak bermakna dan hubungan antar konsep menjadi terputus. Banyak hal yang menyebabkan terjadinya miskonsepsi dalam memahami nilai tempat bilangan dua angka, diantaranya dari siswa itu sendiri yang belum memahami makna nilai tempat bilangan dua angka. Penelitian ini mengungkapkan bahwa beberapa siswa belum dapat mengembangkan ide bahwa ‘ratusan’ merupakan suatu kumpulan baru yang berisikan sepuluh puluhan dan ‘puluhan’ merupakan suatu kumpulan baru yang berisikan sepuluh satuan. Penelitian ini dilakukan pada siswa Kelas 2 SD Negeri 179 Palembang. Tujuan dari penelitian ini adalah mendeskripsikan beberapa kesalahan konsep yang dibuat oleh siswa dalam memahami nilai tempat bilangan dua angka. Hasil penelitian menunjukan beberapa miskonsepsi siswa diantaranya adalah (1) Siswa belum mamahami prosedur dalam menghitung dan memisahkan bilangan satuan dan puluhan. (2) siswa mempunyai alternatif konsep lain tentang bilangan dua digit dan membaca bilangan tersebut sebagai bilangan yang terlepas dari suatu nilai tempat, (3) siswa memiliki alternatif konsep lain dalam memahami penjumlahan angka puluhan dan satuan.
Mathematical concepts are given at the elementary school level is a basic concept that is useful for understanding mathematics at the next level. Their misconceptions make learning becomes no meaningful and the relationships between concepts become disconnected. Many factors led to misconceptions in understanding the value of a two digit number, such as from the students themselves who do not understand the meaning of the place value of two digit numbers. This study revealed that some students have not been able to develop the idea that 'hundreds' is a new collection containing ten tens and 'tens' is a new collection containing ten units. Research was conducted on Second Grade students at SD Negeri 179 Palembang. The purpose of this study are describe some of the misconceptions created by the students in understanding the value of a two-digit number. The results showed some misconceptions students such as; (1) Students are not understanding the procedures in counting and separating the units and tens. (2) the students have another alternative conceptions of two-digit numbers and they read these numbers as numbers that apart from a place value, (3) the students have another alternative concepts in understanding the sum of the tens and sum units.
Pengaruh Pemberian Berbagai Jenis Pupuk Kandang Terhadap Pertumbuhan Bibit Tanaman Kopi Robusta (Coffea canephora L) Pada Tanah Ultisol Di Polybag
Authors: Hayata Hayata , Marpaung Ridawati , Putri Annisa Berliana 
Published: May 2024

This research aims to determine the effect of applying cow manure, goat manure and chicken manure on the seedlings growth of robusta coffee (Coffea cenophora L) in ultisol soil in polybags. This research was carried out since January to April 2023 at Pijoan Gardens, Campus II, Batanghari University and Laboratory of Batanghari University. The design used in this research was a completely randomized design (CRD) with one treatment factor, i.e. various types of manure which consist of 4 (four) treatment levels, namely: k0 : 3000 g of soil media without treatment (control), k1: 30 g cow manure + 3000 g ultisol soil, k2: 30 g goat manure + 3000 g ultisol soil, k3: 30 g chicken manure + 3000 g ultisol soil. Each treatment was repeated 3 (three) times. The parameters observed were soil water content, plant height, stem diameter, crown dry weight, root dry weight and root shoot ratio. The treatment of various types of manure had a significant effect on plant height, stem diameter, crown dry weight and root dry weight, but it had no significant effect on the root-shoot ratio of Robusta coffee seedlings. When this is compared with the control one, so the application of goat manure in treatment k2: 30 g of goat manure + 3000 g of ultisol soil gave the highest average results in several parameters such as plant height (79.00 cm) increasing 29.16%, stem diameter (8.40 mm) increased 38.84%, crown dry weight (24.84 g) increased 149.39% and root dry weight (11.09 g) increased 114.92%, and root shoot ratio (2.32) increased 20.83%, There were changes in the chemical characteristics of the soil, including the initial pH of 5.65 to 6.43-6.48 beside the highest soil water content was found in the k2 treatment at 11.99%.Key words: manure (cow, goat, chicken), growth, Liberica coffee, ultisol.
Potensi Biopestisida Asap Cair Asal Tempurung Kelapa Terhadap Serangga Araecerus fasciculatus (De Geer)
Authors: Meilin Araz , Nasamsir Nasamsir , Handana Junius Febri 
Published: May 2024

Tujuan penelitian ini adalah mengetahui potensi asap cair sebagai biopestisida terhadap serangga A. fasciculatus. Penelitian ini di laksanakan di Laboratorium Dasar Fakultas Pertanian Universitas Batanghari Jambi, mulai bulan Agustus sampai November 2021. Asap cair yang digunakan yaitu berbahan dasar tempurung kelapa yang berasal dari Kelurahan Pancowati, Kecamatan Terbanggi Besar, Lampung Tengah, pemilik pabrik asap cair Bapak Margono. Potensi asap cair sebagai biopestisida di uji menggunakan uji toksisitas secara kontak dan residu. Uji toksisitas menggunakan konsentrasi 1%, 1,5%, 2%, 2,5%, kontrol (aquades), insektisida berbahan aktif klorfiripos 2ml/L pada metode kontak dan metode residu konsentrasi 1%, 1,5%, 2%, 2,5%, 3%, kontrol (aquades), insektisida berbahan aktif klorfiripos 2ml/L sebagai pembanding. Masing-masing perlakuan menggunakan 10 ekor hama A. fasciculatus di ulang 4 kali. Parameter yang diamati mortalitas pada 1, 2, 4, 8, 24, 48, 72 jam setelah aplikasi (JSA), kecepatan kematian serangga dan nilai kerusakan biji menggunakan SNI 01-2097-2008. Analisis data menggunakan sidik ragam (analisis of variance), apabila perlakukan beda nyata dilanjutkan dengan uji Duncan New Mulltiple Range Test (DNMRT) pada taraf 5% menggunakan aplikasi SPSS 20. Hasil analisis menunjukan bahwa asap cair tempurung kelapa berpengaruh nyata terhadap mortalitas serangga A. fasciculatus baik metode kontak maupun metode residu, pada kecepatan kematian metode kontak lebih unggul dibandingkan dengan metode residu dengan 8 jam setelah aplikasi (1,4 ekor/jam) jika dibandingkan dengan insektisida berbahan klorfiripos dengan selisih sebesar (1,7 ekor/jam). Pada metode residu dari pengamatan nilai kerusakan biji biopestisida asap cair tempurung kelapa terbukti berpengaruh mengurangi kerusakan pada biji kopi disimpanan. Asap cair tempurung kelapa berpotensi sebagai alternatif biopestisida terhadap serangga A. fasciculatus dan menurunkan nilai cacat biji kopi disimpanan
أثر تمرينات خاصة في بعض مؤشرات اللياقة الصحية لذوي السمنة من النساء
Authors: Hawraa Kazem Jassim  , Prof. Dr. Hudhayfah Ibrahim Khalil Al-Harbi  
Published: May 2024

هدفت الدراسة الى التعرف على تأثير تمرينات خاصة أعدها الباحثان في بعض مؤشرات اللياقة الصحية على عينة مكونة من (6) من النساء من ذوي السمنة والمشاركات في مركز جاكور للياقة البدنية والرشاقة محافظة بابل وافترض الباحثان ان للتمرينات الخاصة المعدة تأثير ايجابي في متغيرات اللياقة الصحية (Vo2max) و معدل ضربات القلب اثناء الراحة والمرونة) وقد اختارت الباحثان المنهج التجريبي ذي المجموعة الواحدة بالاختبار القبلي والبعدي وتم تحديد القياسات والاختبارات للمتغيرات المختارة بلاظافة الى قياس مؤشر الطول والوزن لعينة البحث وتم أجراء التجارب الاستطلاعية12/1/2023 ومن ثم تم اجراء الاختبارات القبلية بتاريخ (21/1/2023) وتم اعطاء التمرينات الخاصة في القسم الرئيسي من الوحدة التدريبية بواقع 40-45 دقيقة من القسم الرئيسي البالغ 60 دقيقة ولمدة 8 اسابيع وبواقع 24 وحدة تدريبية موزعة على ثلاث الأيام بالأسبوع وبعد اكمال مدة التمرينات البدنية الخاصة قام الباحثان بأجراء الاختبارات البعدية بنفس اجراات الاختبارات القبلية وتم تبويب البيانات بجداول ومن ثم معالجتها باستخدام برنامج (Spss) .
ANALISIS PENENTUAN RUTE DISTRIBUSI LIQUEFIED PETROLEUM GAS (LPG) TABUNG 3 KG MENGGUNAKAN METODE NEAREST NEIGHBOR PADA PT. RADE PUTRA UTAMA
Authors: Febriany Ruth Meinar Evefania , Purwaningdyah Sri Wiludjeng Sunu 
Published: May 2024

Kestabilan pengiriman produk dalam rantai pasokan hulu berperan sebagai faktor yang dapat menentukan daya saing Perusahaan. Dalam tahap pendistribusian produk, pelaku usaha harus memperhatikan dan mengedepankan efisiensi biaya dan waktu untuk memberikan nilai tambah bagi konsumen. Penentuan jalur distribusi yang optimal dapat membantu pelaku usaha untuk mengurangi biaya transportasi dan waktu pengiriman, sehingga produk dapat disalurkan ke tangan konsumen dengan lebih cepat dan efisien. Perusahaan ini, kini dalam proses pendistribusiannya, belum menerapkan proses penentuan rute dengan langkah-langkah yang dinilai aman dan efektif, sehingga menyebabkan armada harus melewati jangkauan jarak yang jauh serta menghabiskan banyak durasi dan biaya. Penelitian ini bertujuan untuk memecahkan persoalan tersebut. Pengimpunan data dilakukan dengan teknik observasi atau pengamatan dan analisis data awal untuk memahami situasi distribusi saat ini, kemudian menggunakan metode transportasi untuk mengidentifikasi permasalahan dan peluang. Setelah itu, pendistribusian logistik digunakan untuk merancang strategi distribusi yang lebih efisien dan menjalankannya. Berdasarkan hasil analisis data, perlu melakukan kecocokan pendistribusian berdasarkan kesamaan wilayah dan akan lebih baik jika Perusahaan menambah armada kendaraan agar proses pendistribusian LPG 3 Kg berjalan dengan baik dan efisien
Penerapan Model Kooperatif Tipe TGT Untuk Meningkatkan Motivasi Dan Prestasi Belajar Siswa Kelas V SD
Authors: Walanty Putri , Agusdianita Neza 
Published: May 2024

This study aims to increase the motivation and learning achievement of VD class students at SDN 77 Bengkulu City by applying the cooperative learning model of the Teams Games Tournament type. This research is a Classroom Action Research. The subjects of this study were 16 male students and 18 female students. There are two research instruments that will be used by researchers in this study, namely the observation sheet and the test. In the first cycle, 10 students got good and very good criteria for learning motivation with a percentage of 29.4%. In cycle II, students' motivation to get good and very good criteria was 33 people with a percentage of 97.05%. In the aspect of student achievement, the increase from the first cycle of IPS subjects was 69.93 to 83.82 with classical completeness of 61.76% to 85.29% in the second cycle. Indonesian subjects from cycle I 71.10 to 83.68 with classical completeness 58.82% to 91.18% in cycle II. Thus the application of the Teams Games Tournament cooperative learning model can increase motivation and student learning achievement in thematic learning in class VD SDN 77 Bengkulu City.
Pelaksanaan Literasi pada Kegiatan Membuka Pembelajaran di kelas 5A SDN 71 Kota Bengkulu
Authors: Andini Anis Fahmi Andini , Susanti Atika 
Published: May 2024

Penelitian ini bertujuan untuk mendeskripsikan pelaksanaan literasi pada kegiatan membuka pembelajaran di kelas 5A SDN 71 Kota Bengkulu. Jenis penelitian yang digunakan adalah penelitian kualitatif, dengan metode deskriptif. Subjek penelitian adalah guru kelas 5 A dan siswa kelas 5 A. Instrumen utama pada penelitian ini yaitu peneliti itu sendiri, sedangkan instrumen pendukungnya yaitu lembar obserasi, lembar wawancara dan dokumentasi. Teknik pengumpulan data menggunakan observasi, wawancara dan dokumentasi. Analisis data yang digunakan dengan pengumpulan data, reduksi data, penyajian data dan penarikan kesimpulan. Pengujian keabsahan data dengan mengggunakan triangulasi, member check dan perpanjangan pengamatan. Hasil penelitian yaitu (1) Literasi menggunakan buku cerita dan teks bacaan yang beragam (2) Strategi saat membaca dengan membaca dalam hati dan membaca bersama dengan salah seorang peserta didik membaca dan peserta didik yang lainnya menyimak, (3) Guru dan peserta didik saat membaca, (4) Tindak lanjut setelah membaca yaitu berupa kegiatan tanya jawab antara guru dan peserta didik mengenai bacaan, membuat ringkasan, serta mempresentasikan hasil ringkasan dan (5) Saran dan masukkan guru. Dapat disimpulkan bahwa kegiatan pelaksanaan literasi pada kegiatan membuka pembelajaran di kelas 5A SDN 71 kota Bengkulu telah dilaksanakan dengan baik, dimana guru dan peserta didik telah terbiasa melakukan kegiatan literasi pada kegiatan awal pembelajaran.
Kata Kunci : Literasi, Membuka pembelajaran
Association between serum albumin concentration change trajectory and risk of hypertension: a cohort study in China
Authors: Liu Yinxing , Xu Shan , Chen Hongen , Dai Shuhong , Hao Jiejing , Chen Xi , Zhang Ji , Li Siguo , Liu Jun , Hu Fulan , Lou Yanmei , Wang Changyi 
Published: May 2024

BackgroundWe sought to assess the risk of hypertension based on the trajectory of changes in serum albumin concentrations.MethodsA total of 11,946 nonhypertension adults aged 30–60 years who underwent at least 3 medical examinations between 2009 and 2016 were included in this study. Group-based trajectory models were obtained for 4 category groups, and logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) for each category group of serum albumin concentration and the risk of hypertension.ResultsDuring a mean follow-up period of 4.30 years, 1,537 hypertension events occurred in 11,946 subjects without hypertension. A high stable trajectory of serum albumin concentrations (OR, 0.70, 95% CI, 0.51–0.96) was associated with a significantly lower risk of developing hypertension. The results of the sensitivity analysis of the high stable trajectory (OR, 0.64, 95% CI, 0.43–0.96) remained statistically significant. Subjects with normal weight and those ≥45 years of age had a significantly lower risk of hypertension at moderate increase (P = 0.053 or 0.026) and high stable trajectories (P = 0.011 or 0.016). In males and overweight subjects, the risk of hypertension was significantly lower in the high stable trajectory (P = 0.038 or 0.044).ConclusionIn this study, we found that moderate increase in serum albumin concentrations and a high stable trajectory were significantly associated with a reduced risk of hypertension in subjects aged ≥45 years and those with normal weight and that high stable serum albumin concentrations were significantly associated with a reduced risk of hypertension in males and overweight subjects.
Inclusive education in the Dominican Republic: teachers’ perceptions of and practices towards students with diverse learning needs
Authors: D’Angelo Sophia , Singal Nidhi 
Published: May 2024

IntroductionStudents with diverse learning needs, particularly those with disabilities or identified as overaged, face significant challenges within the Dominican Republic’s education system. Despite efforts by the Ministry of Education to promote inclusion, these learners often have limited access to quality pedagogical support. This is further confounded by the fact that there is a paucity of research examining how teachers perceive and interact with these learners.MethodsThis ethnographic study draws on diverse methods, including observations and interviews, to investigate teachers’ perceptions of inclusion in two public schools and how these perceptions shaped their pedagogical practices.ResultsThe authors illuminate how teachers’ perceptions of their students, their schools, and their classroom environments influence their commitment to facilitating student learning, irrespective of student age or ability.DiscussionThe findings contribute valuable insights to inform strategies for enhancing inclusive education in the Dominican Republic. Recommendations for policy and teacher training are provided, and the importance of conducting research with teachers is explained.
Treatment trajectories of gender incongruent Austrian youth seeking gender-affirming hormone therapy
Authors: Steininger Jojo , Knaus Sarah , Kaufmann Ulrike , Ott Johannes , Riedl Stefan 
Published: May 2024

ObjectiveThe aim of this study was to describe the treatment trajectories of Austrian children and adolescents with gender incongruence seeking gender-affirming medical care.MethodsPatients who presented with gender incongruence at the pediatric outpatient clinic for differences in sex development at a large university hospital in Austria from January 2008 to December 2022 were included in a retrospective chart review, and analyzed regarding referral numbers, patient characteristics, treatment trajectories, fertility preservation, and legal gender marker changes.ResultsOf 310 eligible patients, 230 (74.2%) were assigned female at birth (AFAB), and 80 (25.8%) were assigned male at birth (AMAB). The number of referrals increased steeply from 2008 to 2018, whereafter it stabilized at around 50 per year. At the time of initial presentation, the median age of patients was 15.6 years (IQR 14.3-16.8). AMAB individuals tended to be younger (median 14.9 years, IQR 13.9-16.8) than AFAB individuals (median 15.8 years, IQR 14.4-16.8; p= 0.012). 207 (66,8%) completed the assessment process and were eligible for gender affirming medical treatment (GAMT). Of those, 89% (186/207) commenced gender affirming hormone therapy in the pediatric outpatient clinic (79/186 received GnRHa monotherapy, 91/186 GnRHa and sex steroids, and 16/186 sex steroid monotherapy). Of the 54 AMAB individuals receiving GAMT, 6 (11.1%) completed fertility preservation prior to therapy initiation. Only 1/132 AFAB adolescents receiving GAMT completed fertility preservation. Chest masculinization surgery was performed in 22 cases (16.7%), and breast augmentation in two cases (3.7%) between the ages of 16 and 18. Changes in legal gender marker were common, with 205 individuals (66.1%) having changed their legal gender marker.ConclusionThis is the first time that treatment trajectories, fertility preservation rates, and changes of legal gender marker have been described in Austrian adolescents with gender incongruence seeking GAMT. The majority received GAMT and changed their legal gender marker, while gender affirming surgery rates were low, and utilization of fertility preservation treatment options was rare.
Associations of marrow fat fraction with MR imaging based trabecular bone microarchitecture in first-time diagnosed type 1 diabetes mellitus
Authors: Li Wei , Wang Wei , Zhang Minlan , Chen Qi , Li Shaojun 
Published: May 2024

PurposeTo determine whether there are alterations in marrow fat content in individuals first-time diagnosed with type 1 diabetes mellitus (T1DM) and to explore the associations between marrow fat fraction and MRI-based findings in trabecular bone microarchitecture.MethodA case-control study was conducted, involving adults with first-time diagnosed T1DM (n=35) and age- and sex-matched healthy adults (n=46). Dual-energy X-ray absorptiometry and 3 Tesla-MRI of the proximal tibia were performed to assess trabecular microarchitecture and vertebral marrow fat fraction. Multiple linear regression analysis was used to test the associations of marrow fat fraction with trabecular microarchitecture and bone density while adjusting for potential confounding factors.ResultsIn individuals first-time diagnosed with T1DM, the marrow fat fraction was significantly higher (p &lt; 0.001) compared to healthy controls. T1DM patients also exhibited higher trabecular separation [median (IQR): 2.19 (1.70, 2.68) vs 1.81 (1.62, 2.10), p &lt; 0.001], lower trabecular volume [0.45 (0.30, 0.56) vs 0.53 (0.38, 0.60), p = 0.013], and lower trabecular number [0.37 (0.26, 0.44) vs 0.41 (0.32, 0.47), p = 0.020] compared to controls. However, bone density was similar between the two groups (p = 0.815). In individuals with T1DM, there was an inverse association between marrow fat fraction and trabecular volume (r = -0.69, p &lt; 0.001) as well as trabecular number (r = -0.55, p &lt; 0.001), and a positive association with trabecular separation (r = 0.75, p &lt; 0.001). Marrow fat fraction was independently associated with total trabecular volume (standardized β = -0.21), trabecular number (β = -0.12), and trabecular separation (β = 0.57) of the proximal tibia after adjusting for various factors including age, gender, body mass index, physical activity, smoking status, alcohol consumption, blood glucose, plasma glycated hemoglobin, lipid profile, and bone turnover biomarkers.ConclusionsIndividuals first-time diagnosed with T1DM experience expansion of marrow adiposity, and elevated marrow fat content is associated with MRI-based trabecular microstructure.
Increased Vasoactive Intestinal Peptide (VIP) in polycystic ovary syndrome patients undergoing IVF
Authors: Sallicandro Luana , Gliozheni Elko , Feudi Davide , Sabbatini Paola , Pellegrino Roberto Maria , Alabed Husam B. R. , Baldini Domenico , Gerli Sandro , Alviggi Carlo , Cascardi Eliano , Cicinelli Ettore , Malvasi Antonio , Fioretti Bernard 
Published: May 2024

IntroductionPolycystic ovary syndrome (PCOS) is a common multifactorial and polygenic disorder of the endocrine system, affecting up to 20% of women in reproductive age with a still unknown etiology. Follicular fluid (FF) represents an environment for the normal development of follicles rich in metabolites, hormones and neurotransmitters, but in some instances of PCOS the composition can be different. Vasoactive intestinal peptide (VIP) is an endogenous autonomic neuropeptide involved in follicular atresia, granulosa cell physiology and steroidogenesis.MethodsELISA assays were performed to measure VIP and estradiol levels in human follicular fluids, while AMH, FSH, LH, estradiol and progesterone in the plasma were quantified by chemiluminescence. UHPLC/QTOF was used to perform the untargeted metabolomic analysis.ResultsOur ELISA and metabolomic results show: i) an increased concentration of VIP in follicular fluid of PCOS patients (n=9) of about 30% with respect to control group (n=10) (132 ± 28 pg/ml versus 103 ± 26 pg/ml, p=0,03) in women undergoing in vitro fertilization (IVF), ii) a linear positive correlation (p=0.05, r=0.45) between VIP concentration and serum Anti-Müllerian Hormone (AMH) concentration and iii) a linear negative correlation between VIP and noradrenaline metabolism. No correlation between VIP and estradiol (E2) concentration in follicular fluid was found. A negative correlation was found between VIP and noradrenaline metabolite 3,4-dihydroxyphenylglycolaldehyde (DOPGAL) in follicular fluids.ConclusionVIP concentration in follicular fluids was increased in PCOS patients and a correlation was found with noradrenaline metabolism indicating a possible dysregulation of the sympathetic reflex in the ovarian follicles. The functional role of VIP as noradrenergic modulator in ovarian physiology and PCOS pathophysiology was discussed.