bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kemampuan pemecahan masalah matematis siswa sekolah menengah pertama negeri 3 tarogong kidul dalam masalah statistika
Authors: Kusnadi Ripki Margani , Mardiani Dian 
Published: November 2022

Problem solving is an attempt to find explanations and answers to each problem encountered. Problem solving is a competency that must be mastered by students in learning mathematics. This study aims to analyze the mathematical problem solving ability of junior high school students in statistical problems. This research is a type of qualitative research using a descriptive approach. The subjects in this study consisted of nine grade VIII students at SMP Negeri 3 Tarogong Kidul, Garut Regency. In this study, the instruments used were in the form of written test questions and interviews. Based on the results of data analysis from research that has been carried out, it is concluded that the written test results of nine students are included in the very high category, totaling three students, the high category two students, the medium category one student, the low category one student and the very low category two students with the highest total score is 94 and the very low score is 32. The results are taken from the results of the written test. Pemecahan masalah adalah usaha mencari penjelasan dan jawaban setiap masalah yang dihadapi. Pemecahan masalah merupakan sebuah kompetensi yang harus dikuasai oleh siswa dalam pembelajaran matematika. Penelitian ini bertujuan untuk menganalisis kemampuan pemecahan masalah matematis siswa sekolah menengah pertama dalam masalah statistika. Penelitian ini merupakan jenis penelitian kualitatif dengan menggunakan pendekatan deskriptif. Subjek dalam penelitian ini terdiri dari sembilan orang siswa kelas VIII di SMP Negeri 3 Tarogong Kidul Kabupaten Garut. Pada penelitian ini instrumen yang digunakan yaitu berupa soal tes tertulis dan wawancara. Berdasarkan hasil analisa data dari penelitian yang sudah dilakukan, diperoleh kesimpulan bahwa hasil tes tertulis dari sembilan siswa yaitu yang termasuk kategori Sangat tinggi berjumlah tiga siswa, kategori tinggi dua siswa, kategori sedang satu siswa, kategori rendah satu siswa dan kategori sangat rendah dua siswa dengan jumlah skor paling tinggi yaitu 94 dan skor sangat rendah yaitu 32. Hasil tersebut diambil dari hasil tes tulis.
Kemampuan pemahaman matematis siswa smp pada materi perpangkatan dan bentuk akar secara daring pada masa pandemi covid-19 di desa jayaraga
Authors: Hidayat Pranitha Agustina , Nuraeni Reni 
Published: November 2022

Mathematical understanding ability is the ability to classify mathematical objects and be able to interpret mathematical ideas or concepts. Online learning or electronic learning (e-learning) is an electronic-based learning process, towards the continuity of learning activities during the COVID-19 pandemic in accordance with policies issued by the government by using various media that support learning. This study aims to determine the ability of students' mathematical understanding in solving problems on the matter of Powers and Root Forms. The type of research used is qualitative research. This research was conducted in Jayaraga Village with research subjects of as many as three junior high school students in class IX. The data collection techniques in this research are using written tests and interviews. The results of this study indicate that students who have a high mathematical understanding ability are able to complete 3 indicators of mathematical understanding ability, while students who have a moderate mathematical understanding ability are only able to complete 2 indicators of mathematical understanding ability, and students who have the low mathematical understanding ability are not able to complete all indicators of understanding ability mathematical. Kemampuan pemahaman matematis adalah kemampuan mengklasifikasikan objek-objek matematika dan mampu menginterpretasikan gagasan atau konsep matematika. Pembelajaran daring atau pembelajaran elektronik (e-learning) merupakan sebuah proses pembelajaran berbasis elektronik, terhadap keberlangsungan kegiatan pembelajaran di masa pandemi COVID-19. Penelitian ini bertujuan untuk mengetahui kemampuan pemahaman matematis siswa dalam menyelesaikan soal-soal pada materi Perpangkatan dan Bentuk Akar. Jenis penelitian yang digunakan adalah penelitian kualitatif. Penelitian ini dilakukan di Desa Jayaraga dengan subjek penelitian sebanyak tiga orang siswa SMP kelas IX. Adapun teknik pengumpulan data dalam peneltian ini adalah menggunakan tes tulis dan wawancara. Hasil penelitian ini menunjukan bahwa siswa yang memiliki kemampuan pemahaman matematis tinggi mampu menyelesaikan 3 indikator kemampuan pemahaman matematis, sedangkan siswa yang memiliki kemampuan pemahaman matematis sedang hanya mampu menyelesaikan 2 indikator kemampuan pemahaman matematis dan siswa yang memiliki kemampuan pemahaman matematis rendah tidak mampu menyelesaikan semua indikator kemampuan pemahaman matematis.
Kemampuan representasi matematis siswa pada materi bilangan berdasarkan self-confidence
Authors: Ulfa Nabilah Citra Amalia , Sundayana Rostina 
Published: November 2022

The low ability of students’ mathematical representation has an effect on achievement in mathematics learning. Students find it difficult to understand what is known and asked, also are still not able to find a way out in solving the questions so many students find it difficult to solve the problems given in the form of story questions. Low self-confidence is also an influence on student success because self-confidence itself is self-confidence in doing tasks and choosing good, appropriate, and effective solutions. The purpose of this study was to analyze the mathematical representation ability of number material based on self-confidence. The subjects of this study were three class VIII junior high school students who were taken randomly. The data collection techniques in this study were tests, interviews, documentation, and questionnaires. The results of this study indicate that: (1) Respondents with a high self-confidence category can solve problems on the sub-indicators of making mathematical equations or models from other representations, making image representations to clarify problems and facilitate solving, making problem situations based on the data or representations provided; (2) Respondents with moderate self-confidence and low self-confidence categories can only solve the problem in the sub-indicator to create a problem situation based on the data or representation provided. Rendahnya kemampuan representasi matematis siswa berpengaruh terhadap prestasi dalam pembelajaran matematika. Siswa sulit memahami apa yang diketahui dan ditanyakan, juga masih kurang mampu mencari jalan keluar dalam menyelesaikan soal sehingga banyak siswa yang merasa kesulitan dalam menyelesaikan permasalahan yang diberikan dalam bentuk soal cerita. Rendahnya Self-confidence juga menjadi pengaruh terhadap keberhasilan siswa karena self-confidence itu sendiri merupakan kepercayaan diri dalam melakukan tugas dan memilih cara penyelesaian yang baik, tepat dan efektif. Tujuan penelitian ini untuk menganalisis kemampuan representasi matematis pada materi bilangan berdasarkan self-confidence. Subjek penelitian ini adalah tiga orang siswa SMP kelas VIII yang diambil acak. Adapun teknik pengumpulan data dalam penelitian ini adalah tes, wawancara, dokumentasi, angket. Hasil penelitian ini menunjukkan bahwa: (1) Responden dengan kategori self-confidence tinggi dapat menyelesaikan permasalahan pada sub indikator membuat persamaan atau model matematika dari representasi lain, membuat representasi gambar untuk memperjelas masalah dan memfasilitasi penyelesaian, membuat situasi masalah berdasarkan data atau representasi yang diberikan; (2) Responden dengan kategori self-confidence sedang dan self-confidence rendah hanya dapat menyelesaikan permasalahan pada sub indikator membuat situasi masalah berdasarkan data atau representasi yang diberikan.
Effects of a 4-week pecan-enriched diet on cognitive function in healthy older adults
Authors: Cogan Betsy , Pearson Regis C. , Paton Chad M. , Jenkins Nathan T. , Cooper Jamie A. 
Published: November 2022

BACKGROUND: Pecans are rich in nutrients known to benefit cognition. OBJECTIVE: To examine the effect of daily pecan consumption on cognitive function in older adults. METHODS: In this randomized controlled trial, 42 adults (50–75y) either consumed 68 g of pecans/day for 4-weeks (pecan; n = 21) or avoided all nuts (control; n = 21). At pre- (V1) and post-intervention (V2) visits, cognitive function was assessed using a fluid composite score and four subtests from the NIH Toolbox-Cognitive Battery (NIHTB-CB) (Flanker Test, Digital Change Card Sort Test (DCCS), Picture Sequence Memory Test (PSMT), NIHTB Auditory Verbal Learning Test (RAVLT)) at fasting, 30- and 210-min after a high-saturated fat meal void of pecans. RESULTS: From V1 to V2, fasting and postprandial cognitive performance did not differ between groups. There were improvements in both groups for fasting fluid composite score ( p < 0.001) and performance on RAVLT, PSMT, DCCS, and Flanker tests from V1 to V2 ( p < 0.001 for all), with no differences between groups. Additionally, postprandial performance on RAVLT, PSMT, and Flanker tests improved at V2 ( p < 0.01 for each), with no differences between groups. CONCLUSIONS: A short-term pecan-enriched diet did not provide additional cognitive benefits in healthy older adults in the fasted or postprandial state.
PROSEDUR TENDER PENGADAAN KERETA API (Studi Kasus Pada PT. Industri Kereta Api (Persero)
Authors: Wanda Putri Oktaviani  , Netty Lisdiantini  , Agustinus Doedyk Setiyawan  
Published: November 2022

Tender dapat artikan lelang atau sistem jual beli yang dilakukan suatu pihak dengan cara mengundang vendor (penjual atau penyedia) untuk mempresentasikan harga dan kualitas yang dibutuhkan. Harga dan kualitas yang terbaiklah, nantinya yang akan menjadi pemenang. Lelang atau sistem tender sangat digemari terutama oleh perusahaan-perusahaan, mengingat jumlah nominal dan durasi kontrak dalam suatu lelang sangat besar dan bervariasi. Penelitian ini bertujuan untuk mengetahui prosedur tender pengadaan kereta api oleh PT KAI (Persero) dari PT INKA (Persero) khususnya untuk tender umum pascakualifikasi, serta dokumen yang diperlukan dalam proses tersebut. Penelitian ini menggunakan metode deskriptif kualitatif yang bersumber dari data primer yaitu dengan melakukan wawancara, observasi, dan dokumentasi objek penelitian serta data sekunder yaitu dengan melakukan pengkajian bahan pustaka yang relevan. Dengan Metode Triangulasi hasil penelitian menunjukkan bahwa PT INKA (Persero) sudah melaksanakan prosedur tender pascakualifikasi pengadaan kereta api sesuai dengan peraturan dan SOP yang berlaku, walaupun untuk tahap klarifikasi dilakukan bersamaan dengan tahap aanwinzjing; tahap penyampaian, pembukaan, dan evaluasi dokumen dilaksanakan dalam satu waktu; dan tahap sanggah tidak dilakukan apabila telah ditetapkan sebagai pemenang tender.
Long-term Maintenance of Retest Learning in Young Old and Oldest Old Adults
Authors: Yang Lixia , Krampe Ralf T. 
Published: November 2022

<p>This study examined the maintenance of retest learning benefi ts in young old and oldest old adults over an 8-month period in 3 cognitive abilities: reasoning, perceptual-motor speed, and visual attention. Twenty-four young old (aged 70 – 79 years, M = 74.2) and 23 oldest old adults (aged 80 – 90 years, M = 83.6) who participated in a previously published study (Yang, L., Krampe, R. T., & Baltes, P. B. [2006]. Basic forms of cognitive plasticity extended into the oldest-old: Retest learning, age, and cognitive functioning. Psychology and Aging, 21, 372 – 378) returned after an 8-month delay to complete 2 follow-up retest sessions. The results demonstrated that both young old and oldest old groups maintained about 50% of the original retest learning benefi ts. This extends the earlier fi ndings of substantial long-term cognitive training maintenance in young old adults to a context of retest learning with oldest old adults, and thus portrays a positive message for cognitive plasticity of the oldest old </p>
Buran, S. (Ed.). (2020). Edebiyatta posthümanizm. TPLondon.
Authors: Zampaki Nikoleta 
Published: November 2022

The edition entitled Edebiyatta Posthümanizm [Posthumanism in Literature] is the first edition in the Turkish language which introduces the narrative of posthumanism in Anglo-American Literature and Culture. This edition is the first book of the Posthumanism Series by TPLondon, edited by Sümeyra Buran, that examines how posthumanism is conceptualized in literary writing by studying the western traditional binaries, e.g. human and nature, human and non-humans, and so forth, that have nurtured the ideology and mentality of western societies for centuries. This edition also examines the contribution of literature in presenting alternative ideas and thoughts by laying the ground of Posthumanities in Turkey by opening new doors for the readers to understand the changing status of man and the nature of the relationship (e.g. hybrid, parasitic, etc.) between the human and more-than-human world.
Insulin Resistance in Chronic Kidney Disease Patients Without Diabetes
Authors: Das Soma , Barua Prasun , Alam Abu Mansur Md Didarul , Karmakar Pijush , Haque Mahmudul 
Published: November 2022

Background: Cardiovascular disease is the leading cause of morbidity and mortality in patients of Chronic Kidney Disease (CKD). According to recent studies, insulin resistance and compensatory hyperinsulinemia may have some important roles in cardio-renovascular complications of these patients. So, the aim of this study was to evaluate the insulin resistance status in nondiabetic CKD patients and whether it correlates with glomerular function. Materials and methods: This crosssectional comparative study was carried out in the Department of Biochemistry, Chattogram Medical College from January to December, 2016. A total of 130 subjects of 30- 60 years were included by nonprobability consecutive sampling. Of them, 80 were nondiabetic CKD patients of stages III-V and 50 were healthy controls. Fasting plasma glucose, creatinine and insulin concentrations were measured using automated analyzers. Insulin resistance index was determined by Homeostatic Model Assessment Insulin Resistance (HOMA-IR) whereas eGFR was calculated by MDRD formula. Results: The nondiabetic CKD patients had significantly higher mean fasting plasma insulin (18.08 mIU/L) compared to controls (9.43 mIU/L). They also showed significantly higher mean HOMA-IR values (4.37) relative to healthy individuals (2.23). Overall, insulin resistance was 66% in nondiabetic CKD patients vs. 18% in controls. There was significant association of insulin resistance with CKD. But, HOMA-IR did not seem to correlate with CKD stages or eGFR. Conclusion: In conclusion, this study revealed significant association between insulin resistance and nondiabetic CKD, even though substantial correlation between insulin resistance and glomerular filtration rate was absent.
JCMCTA 2019 ; 30 (1) : 51-55
Rehabilitation Approaches of a Bangladeshi Boy With Ataxia Telangectasia: A Case Report
Authors: Newaz Fatema , Parvez Md Farhad , Islam Hasibul , Uddin Taslim , Rahman Md Safiur , Khandakar Md Nuruzzaman 
Published: November 2022

Ataxia-Telangiectasia (AT) is a rare form of neurodegenerative disorder of hereditary origin. In Bangladesh we don’t have any epidemiological study. Till today there is no gold standard of the diagnosis, further to its wide clinical heterogeneity, it often leads physicians to an incorrect or missed diagnosis. So is the importance of the insight into this disease. We report a 10 years old male child who presented with history of difficulty in posture and walking associated with frequent fever, delayed slurred speech and abnormal eye movements. Physical examination revealed delayed milestones of development involving neck control, sitting, walking, unsteady supported swaying gait and speech language dysfunctions. MRI of brain showed cerebellar atrophy and a raised serum Alfafeto protein level. The child was diagnosed as a case of AT and was presented in a clinical meeting at Bangabandhu Sheikh Mujib Medical University for discussions and further managements including medical rehab. We offered him a course of combined rehabilitation therapy program and discharged home.
JCMCTA 2019 ; 30 (1) : 64-67
PERBANDINGAN MODEL DISCOVERY LEARNING DAN EKSPOSITORI TERHADAP HASIL BELAJAR SISWA MATERI BANGUN RUANG SISI DATAR
Authors: Martucilia Wenny , Agustinsa Ringki , Utari Tria 
Published: November 2022

Penelitian ini bertujuan untuk mengetahui perbandingan model pembelajaran Discovery Learning dan metode Ekspositori terhadap hasil belajar matematika siswa kelas VIII SMP Negeri 3 Kota Bengkulu pada materi bangun ruang sisi datar. Jenis penelitian yang dilakukan pada penelitian ini yaitu penelitian eksperimen semu (quasi eksperiment research) dengan desain the nonequivalent pretest-posttest control group design. Populasi dalam penelitian ini adalah seluruh siswa SMP Negeri 3 Kota Bengkulu dengan dua kelas sampel yang dipilih melalui purposive sampling yaitu kelas VIII 4 (kelas eksperimen) dan VIII 5 (kelas kontrol) yang berjumlah masing-masing 30 orang. Pengumpulan data dilakukan dengan metode tes hasil belajar. Nilai rata-rata posttest kelas eksperimen sebesar 54,4 dan nilai rata-rata posttest kelas kontrol sebesar 34,0. Hasil dari pengujian hipotesis diperoleh nilai sehingga dapat disimpulkan bahwa hasil belajar matematika siswa kelas VIII SMP Negeri 3 Kota Bengkulu pada materi bangun ruang sisi datar dengan model Discovery Learning lebih baik dari hasil belajar matematika metode Ekspositori.
A systematic review and meta-analysis on different stem fixation methods of radial head prostheses during long-term follow-up
Authors: Yang Guang , Li Shangzhe , Zhang Hailong , Lu Yi 
Published: November 2022

Background: Radial head arthroplasty (RHA) is typically performed for non-reconstructible radial head fractures with or without valgus stability. The fixation methods can be divided into cemented rigid fixation, such as screw fixation, and uncemented micromovement fixation, including smooth stem, press-fit, expanded device, in-growth stem, and grit-blasted stem fixations. Different fixation methods may impact long-term clinical outcomes and cause complications. This study aimed to compare the long-term follow-up outcomes of cemented and uncemented radial head prostheses.Methods: A computerized literature search was performed in the PubMed/MEDLINE, Embase, Cochrane Library, and Web of Science databases for studies on radial head prostheses, replacement, and arthroplasty published from inception to April 2022. The prostheses fixation method was divided into cemented and uncemented fixation groups. The outcomes of interest included the participant characteristics, prostheses types, clinical outcomes, reoperation rates, and complication rates during long-term follow-up.Results: A total of 57 studies involving 2050 patients who underwent RHA were included in our analysis. Cemented fixation was used in 23 of these studies, uncemented fixation in 35 studies, and both cemented and uncemented fixations in one study. Both fixation groups showed significantly improved clinical outcomes after treatment. In particular, both the reoperation and complication rates were lower in the uncemented fixation group (12% and 22%, respectively) than that in the cemented fixation group (20% and 29%, respectively). Among the studies, uncemented monopolar fixation had the lowest reoperation rate (14%), while cemented monopolar fixation had the highest reoperation rate (36%). Regarding complication rates, uncemented bipolar fixation yielded the lowest rate (12%), while cemented bipolar fixation yielded the highest rate (34%). The range of motion and clinical outcome scores were good in both groups.Conclusion: Uncemented radial head prostheses had lower reoperation and complication rates than cemented prostheses. In particular, uncemented monopolar prostheses may yield the lowest reoperation rate, while uncemented bipolar prostheses may yield the lowest overall complication rate.
Strategies for developing long-lasting therapeutic nucleic acid aptamer targeting circulating protein: The present and the future
Authors: Zhang Yihao , Zhang Huarui , Chan Daniel Wing Ho , Ma Yuan , Lu Aiping , Yu Sifan , Zhang Baoting , Zhang Ge 
Published: November 2022

Aptamers are short, single-stranded DNA or RNA oligonucleotide sequences that can bind specific targets. The molecular weight of aptamers (&lt;20 kDa) is lower than the renal filtration threshold (30∼50 kDa), resulting in very short half-lives in vivo, which limit their druggability. The development of long-lasting modification approaches for aptamers can help address the druggability bottleneck of aptamers. This review summarized two distinct kinds of long-lasting modification approaches for aptamers, including macromolecular modification and low-molecular-weight modification. Though it is a current approach to extend the half-life of aptamers, the macromolecular modification approach could limit the space for the dosage increases, thus causing potential compliance concerns due to large molecular weight. As for the other modification approach, the low-molecular-weight modification approach, which uses low molecular weight coupling agents (LMWCAs) to modify aptamers, could greatly increase the proportion of aptamer moiety. However, some LMWCAs could bind to other proteins, causing a decrease in the drug amounts in blood circulation. Given these issues, the outlook for the next generation of long-lasting modification approaches was proposed at the end, including improving the administration method to increase dosage for aptamer drugs modified by macromolecule and developing Artificial intelligence (AI)-based strategies for optimization of LMWCAs.
Recovery of carbon fiber-reinforced polymer waste using dimethylacetamide base on the resin swelling principle
Authors: Li Zixin , Xing Mingfei , Zhao Li , Li Zhan , Wang Yaping 
Published: November 2022

The mechanical recycling method of the carbon fiber-reinforced polymer (CFRP) has the advantages of simple process, less pollution and low cost, but only low utilization value of carbon fibers in powder or short fibers form can be obtained. To reduce the length and strength loss of the recycled carbon fibers, a novel and cost-effective dimethylacetamide (DMAC) swelling technique was developed to achieve rapid delamination of the CFRP laminates under mild conditions (120°C–160°C, 1 h). The corresponding swelling ratios and mass-loss rates of cured epoxy resin (CEP) were about 121.39%–157.39% and 0–0.69%, respectively. Excessive swelling of CEP in DMAC resulted in the cracking of the resin matrix between the adjacent carbon fiber layers. Thus the CFRP laminates were delaminated into soft single carbon fiber layers, which showed excellent cutting performance and reinforcing properties. The delamination products were cut into thin strips of different sizes and vacuum bag molded into new CFRP laminates. The flexural strength and tensile strength of the newly produced CFRP laminates were about 76.38%–90.98% and 94.61%–98.54% of the original CFRP laminates, respectively. More importantly, the chemical compositions of DMAC and CEP were unchanged during the physical swelling process. No organic pollutants (caused by resin degradation) were generated. And the used DMAC can be easily recycled by filtration. Therefore, this study provides a strategy for low-cost and high-valued recycling of CFRP waste.