bluuebunny/crossref_metadata_2025 huggingface dataset:
MYBL1 Knockdown in a Triple Negative Breast Cancer Line: Evidence of Down-Regulation of MYBL2, TCF19 and KIF18b Expression
Authors:   Department of Biology, Texas Southern University Houston TX, USA, A Player , N Abraham ,   Department of Biology, Texas Southern University Houston TX, USA, N Abdulrahman ,   Department of Biology, Texas Southern University Houston TX, USA, E Nsende ,   Department of Biology, Texas Southern University Houston TX, USA, S Cunningham ,   Department of Biology, Texas Southern University Houston TX, USA, S Rogers ,   Department of Biology, Texas Southern University Houston TX, USA
Published: July 2021

Purpose: The MYBL1 gene is a strong transcriptional activator, associated with cell cycle signaling and differentiation. Data show the gene is overexpressed in triple negative breast cancers. Considering the possibility that MYBL1 might be involved in events associated with the pathogenesis of these cancers, we sought to identify genes associated with MYBL1 expression in triple negative breast cancer. Methods: shRNA lentiviral knockdown was used to down-regulate the MYBL1 gene. Microarray analyses were used to identify genes either directly or indirectly affected by targeting MYBL1 knockdown. Data analyses was performed utilizing Affymetrix TAC 4.0, Chip X transcription factor analyses, Target Scan miRNA analyses, and STRING analyses was used to determine protein: protein interaction and pathway analyses. Web Gestalt and Gene Ontology were used to determine pathway and gene-set enrichments. Publicly available patient and cell line datasets were retrieved and processed using resources available in Gene Expression Omnibus and Oncomine. The polymerase chain reaction and western analyses were used to determine transcript and protein levels, respectively. Results: Knockdown of MYBL1 in a triple negative breast cell line led to down-regulation of MYBL2, TCF19, KIF18b along with an enrichment of cell cycle signaling genes. Gene expression analyses show that MYBL1, MYBL2, TCF19 and KIF18b display a similar pattern of expression in breast cell lines and many of the archival patient datasets examined. Conclusion: TNBC is a heterogeneous subtype, so these data suggest that cancers that over-express MYBL1, express MYBL2, TCF19 and KIF18b. Bioinformatic analyses suggest MYBL1 regulates MYBL2 which leads to regulation of TCF19 and KIF18b.
MRI-Based Classification Scheme for Degenerative Cervical Spinal Stenosis (DCSS Classification)
Authors:   Department of Neurosurgery, Carl Gustav Carus University Hospital, Technische Universität Dresden, Dresden, Saxony, Germany, M Leimert , I Hamann ,   Department Medical Engineering, Fraunhofer Institute for Machine Tools and Forming Technology, Dresden, Saxony, Germany, R Bostelmann ,   University Clinic Düsseldorf, Med Fac, Düsseldorf, NRW, Germany, S von Sachsen ,   Innovation Center for Computer Assisted Surgery (ICCAS), University of Leipzig, Leipzig, Saxony, Germany, H Steinke ,   Institute of Anatomy, University of Leipzig, Leipzig, Saxony, Germany, J Meixensberger ,   Department of Neurosurgery, Leipzig University Hospital, Leipzig, Saxony, Germany, G Schackert ,   Department of Neurosurgery, Carl Gustav Carus University Hospital, Technische Universität Dresden, Dresden, Saxony, Germany
Published: July 2021

Background: The severity of Degenerative Cervical Spinal Stenosis (DCSS) is currently assessed by determining the sagittal diameter of the spinal canal, the degree of narrowing, and the level of stenosis using magnetic resonance imaging (MRI). The aim of our study was to develop and evaluate an optimized, MRI-based classification of DCSS to support treatment decision-making. Methods: We analyzed preoperative MRI scans of 75 patients to determine key morphological features of DCSS. Based on the features found, a classification was proposed and tested on ten representative image sets by 53 neurosurgeons to determine practicability and inter-observer reliability. Results: DCSS extended over one (13 and 17 % of pat.), two (23 and 31 % of pat.) or three (39 and 52 % of pat.). Thickening of the ligaments was observed in 71%, scoliosis in 3% and grade I spondylolisthesis in 11% of the patients. The DCSS classification has three main Types (A, B, C), which differ in the extent of the stenoses and thickening of the ligaments. Each main class has 2-3 subtypes depending on the position of the stenosis (lateral/medial) and the number of stenotic segments. An additional suffix indicates the presence of concomitant pathology (spondylolisthesis, scoliosis). 26 (49 %) neurosurgeons rated the classification as useful. For the main classes, interobserver reliability was fair (k=0.23). For subtype and concomitant pathology, interobserver reliability was low (k=0.14). Conclusions: In the study a new classification system for degenerative spinal stenoses was developed, which combines anatomical and clinical defect characteristics. Deviations in the classification result from a strict subdivision, so that adjustments are necessary.
Structure and Dynamics of Curcumin Encapsulated Lecithin Micelles: A Molecular Dynamics Simulation Study
Authors: Hakim Lukman , Mardiana Diah , Rokhiyah Urnik , Lestari Maria Lucia Ardhani Dwi , Ningsih Zubaidah
Published: July 2021

Curcumin is a natural product with potential pharmaceutical applications that can be augmented by drug delivery technology such as nano emulsion. Our study focuses on microscopic structural and dynamics response of curcumin encapsulation in micellar system with lecithin as a natural surfactant under variations of composition and temperature using molecular dynamics (MD) simulations. The results highlight the self-assembly of lecithin micelle, with curcumin encapsulated inside, from initial random configurations in the absence of external field. The variation of composition shows that lecithin can aggregate into spherical and rod-like micelle with the second critical micelle concentration lies between 0.17-0.22 mol dm−3. The radial local density centering at the micelle center of mass shows that the effective radius of micelle is indeed defined by the hydrophilic groups of lecithin molecule and theencapsulated curcumin molecules are positioned closer to these hydrophilic groups than the innermost part of the micelle. The spherical micelle is shown to be thermally stable within the temperature range of 277-310 K without a perceivable change in the spherical eccentricity. The dynamics of micelle are enhanced by the temperature, but it is shown to be insensitive to the variation of lecithin-curcumin composition within the studied range. Simulation results are in agreement with the pattern obtained from experimental results based on particle size, polydispersity index, and encapsulation efficiency.
Seagrass Cholorophyll-a, Biomass and Carbon Algorithms Based on the Field and Sentinel-2A Satellite Data at Karimunjawa Island, Indonesia
Authors: Hartoko Agus , Sembiring Yoan Teresia , Latifah Nurul
Published: July 2021

Chlorophyll-a in seagrass biomass is functioned for the photosynthetic process and store the organic carbon in their biomass of the leaf, rhizome, and root. Ecologically has functioned as blue carbon in reducing global warming adaptation and mitigation strategy. The study aimed to explore seagrass species, chlorophyll-a content, biomass and carbon stock at Karimunjawa Island. Develop algorithms of the Sentinel-2A satellite data based on field seagrass chlorophyll-a, biomass and carbon and at Pokemon and Bobby beach Karimunjawa Island. Four species of seagrass found at Bobby and Pokemon beach are Holodule pinifolia with a density of 160.44 ind.m−2 , Enhalus acoroides with 26.22 ind.m−2, Halophila ovalis with 6.67 ind.m−2 and Thalassia hemprichii with 4.44 ind.m−2.The lowest seagrass chlorophyll-a is 5.854 mg.ml−1 found in H. pinifolia and the highest is 20.819 mg.ml−1found in E. acoroides at Pokemon beach. The range of seagrass chlorophyll-a at Bobby beach was 3.485 - 14.133 mg.ml−1 in T. hemprichii. The smallest individual biomass dry weight was found in T.hempirichii with 1.32 g.dry.weight per individu, and the biggest in E.acoroides with 6.98 g.dry.weight per individu. The highest seagrass biomass at Pokemon beach was in E. acoroides with 236.93 g.m−2 which has a wide leaf morphology and the lowest in H. pinifolia with 75.91 g.m−2 with the smallest leaf morphology. The range of seagrass biomass at Bobby beach is 97.62 - 264.48 g.m−2 which is dominated by T.hempirichii. The range of seagrass carbon was 109.63 - 136.82 gC.m−2at Pokemon beach, and in the range of 95.00 - 114.01 gC.m−2 at Bobby beach. Algorithm of seagrass chlorophyll-a = -36.308 (B3/B4)2 – 140.41(B3/B4) + 83.912 ; biomass = -7028.3 (B3/B4)2 + 14948 (B3/B4) – 7764.4; carbon = -17.529(B2/B3)2 + 143.82(B2/B3) – 5.3362 for Pokemon beach. Algorithm of chlorophyll-a = 455.02 (B2/B4)2 + 823.72 (B2/B4) + 375.48; biomass = -14699 (B3/B2)2 + 28395(B3/B2) – 13537; and carbon = - 0.001(B3/B4)2+ 0.209(B3/B4) - 10.203 for Bobby beach. The use of Band-2 (0.490 ????m), Band-3 (0.560 ????m) and Band-4 (0.665 ????m) Sentinel-2A satellite data in the development of seagras chlorophyll-a, biomass and carbon algorithm was found to be significant.
Chemical Characterization of Secondary Metabolite from the Endophytic Fungus Trichordema reecei isolated from The Twig of Syzygium aqueum
Authors: Hiras Habisukan Ummi , Elfita Elfita , Widjajanti Hary , Setiawan Arum
Published: July 2021

Endophytic fungi are microorganisms that live in plants, without negative effects and are mutually related to hosting plants. Exploration of bioactive compounds from Endophytic fungi is easier and cheaper because they do not require a large area, a short growing time, and uncomplicated mixed compounds. Endophytic fungi are new and patent base secondary metabolites but they are not extensively characterized and investigated for the exploration of raw materials for drugs. The purpose of this study was to obtain antioxidant secondary metabolites from Endophytic fungi that live in the Syzygium aqueum medicinal plant. In this study, Endophyticfungi were isolated from S. aqueum twigs and molecular identification. The secondary metabolites were isolated by chromatographic method and chemical structure identified by spectroscopy. Antioxidant activity was evaluated by method 1,1diphenyl-2-picryl hydrazyl (DPPH). Phylogenetic analysis showed the Endophytic fungi of S. aqueum twig have a high similarity with the Trichordema reecei twig 19MSr.B2.3. The secondary metabolites from the ethyl acetate extract of the liquid culture of the fungus were identified as (4-hydroxy-3-(4-hydroxyphenyl)-5 oxotetrahydrofuran-2-yl) methyl acetate with IC50= 75.13 ????g/mL. The secondary metabolites can be developed into starting molecules for potential antioxidant agents.
Silica from Natural Sources: a Review on the Extraction and Potential Application as a Supporting Photocatalytic Material for Antibacterial Activity
Authors: Luthfiah Annisa , Deawati Yusi , Firdaus M. Lutfi , Rahayu Iman , Eddy Diana Rakhmawaty
Published: July 2021

Silica has become a popular material due to its high abundance and many advantages in various fields. This material can be produced synthetically and extracted from nature with resultant advantages in the application of green production. Therefore, this article deals with the form of silica extracted from quartz sand, leaves, and agricultural wastes found in nature. The extraction process from various sources would be described using thermal, biological, and chemical methods. This review also highlights the potential application of silica as a photo catalytic antibacterial-supporting material and discusses its role in increasing the effectiveness of the process. The discussion was continued with research on this procedure, where synthetic auxiliary materials were compared to the extracted silica. Furthermore, results obtained indicated that the extracted material had very good potential as a photocatalyst adjunct in its application in the antibacterial field.
The Utilization of Modified Chitosan from Shrimp Shell As Photodegradation of Pesticides Paraquat Dichloride
Authors: Mohadi Risfidian , Rahayu Palapa Neza , Hartono Rudi , Hidayati Nurlisa , Rozirwan
Published: July 2021

In this study, the chitosan modification of shrimp shell has been made by impregnated the chitosan from shrimp shell with Ti/ZrO2 and ZrO2 to formed composite of chitosan-Ti/ZrO2 and chitosan-ZrO2. These composites were made by immobilization technique and characterized by FTIR and SEM-EDX. The chitosan-Ti/ZrO2 and chitosan-ZrO2 composite were used as a catalyst to degrade the pesticide paraquat dichloride in the presence of UV light (????= 257 nm). The photodegradation process of paraquat dichloride takes place under 10 watts UV light irradiation and was measured using spectrophotometer UV. The maximum degradation percentage of pesticide paraquat dichloride photodegradation by chitosan-Ti/ZrO2 and chitosan-ZrO2 composites are 61.97% and 57.97% within 30 minutes irradiation time.
Modification of Cu/Cr Layered Double Hydroxide by Keggin Type Polyoxometalate as Adsorbent of Malachite Green from Aqueous Solution
Authors: Palapa Neza Rahayu , Taher Tarmizi , Wijaya Alfan , Lesbani Aldes
Published: July 2021

Modification of Cu/Cr layered double hydroxides (LDHs) has been conducted by intercalation using Keggin type polyoxometalate [a-SiW12O40]4- to form CuCr-[a-SiW12O40]. The materials were analyzed by XRD, FTIR, and surface area analyses. Furthermore, materials were used as selectivity adsorbents of cationic dyes such as malachite green, rhodamine-B and methylene blue. The malachite green is more selective than others from an aqueous solution. The adsorption of malachite green showed that the adsorption capacity of CuCr-[a-SiW12O40] was higher than pristine LDHs. The adsorption process was followed pseudo second order kinetic model and Langmuir isotherm adsorption. The Qmax value of CuCr-[a-SiW12O40] reached 55.322 mg/g at 323 K after 100 minutes adsorption time. Thermodynamic parameters such as ΔG, ΔH and ΔS confirm that the adsorption process was endothermic, spontaneous, and more favorable at high temperatures. The intercalated material was higher structural stability toward reusability adsorbent than pristine LDHs.
The Effects of Using a Case Study Method for Environmental Education
Authors: Rudyshyn Sergii D , Stakhova Inna A , Sharata Nataliia H , Berezovska Tetiana V , Kravchenko Tetiana P
Published: July 2021

The purpose of the study was to do a comparative analysis of the quality of the case study method for developing practical skills related to environmentally friendly behavior that is in line with the professional orientations of two student groups of different non-environmental specialties. Research methods included an ascertaining and forming experiment; questionnaires with open and closed questions; project modeling; collection and mathematical and statistical evaluation of empirical data; graphic methods of statistical data processing; comparative analysis of the findings; functional analysis of empirical data; analysis of causal relationships; and generalization and forecasting. According to the results of secondary diagnostics that involved the distribution of students by zones of success, revealed a significant increase in indicators of activity-behavioral aspects of professionally oriented environmental education. In Group I, 3.1% of students were in the area of undesirable indicators, and in Group II, it was 4.0%. The neutral area with confused tendencies was occupied by 33.8% of students of Group I, and 20.3% of Group II. The targeted area of clearly positive dynamics involved 63.1% of Group I, and of Group II, 75.7%. Further enquiry into the research issue should relate to enhancing the case study method in the framework of environmental education.
Efektivitas Program CATCH Berbasis Tutor Sebaya Ditinjau dari Self-Efficacy dan Komunikasi Matematis Siswa
Authors: Setiana Setiana
Published: July 2021

Self-efficacy dan komunikasi matematis merupakan problematika yang dikaitkan dengan program CATCH dan menjadi bahasan dalam penelitian ini. Tujuan penelitian ini adalah untuk mengetahui efektivitas program CATCH berbasis tutor sebaya terhadap self-efficacy dan kemampuan komunikasi matematis siswa. Program CATCH yang dilakukan adalah prapengembangan, pengembangan, dan paska pengembangan. Metode penelitian dan pengembangan mengikuti alur Akker meliputi pendahuluan dan uji formatif, mengacu pada Tessemer mencakup: evaluasi diri; uji ahli; uji perorangan; uji kelas kecil; uji terbatas. Subjek penelitian pengembangan ini adalah siswa SMP berjumlah 20 siswa. Pengambilan skor self-efficacy dari skala self-efficacy dan data kemampuan komunikasi matematis melalui pemberian tes kemampuan komunikasi matematis. Hasil validasi ahli menunjukkan bahwa pengembangan program CATCH berbasis tutor sebaya memenuhi standar kelayakan materi, desain, dan bahasa. Hasil uji perorangan menunjukkan bahwa keterbacaan dan respon siswa terhadap program pada kategori sangat baik, dan uji kelas kecil menunjukkan efektivitas waktu membaca dan tingkat pemahaman pada kategori baik. Hasil penelitian menunjukkan bahwa program CATCH berbasis tutor sebaya efektif meningkatkan self-efficacy dan kemampuan komunikasi matematis siswa.
Pengembangan Model Pembelajaran Abad 21 Berbasis Media Penanaman Karakter Bertema Nilai-Nilai Pancasila dan Sadar Konstitusi
Authors: Prananta Yunina Resmi
Published: July 2021

Tujuan dari artikel ini untuk mengembangkan model pembelajaran abad 21 berbasis media berupa media pembelajaran kognitif dan afektif untuk penanaman nilai Pancasila dan sadar konstitusi (SIPANCA), menguji kelayakan dan kepraktisan media tersebut, dan mengukur efektifitas media. Metode pengembangan digunakan merujuk pada langkah pengembangan dari Gall dan Borg (2008) yang disederhanakan menjadi 5 langkah adopsi. Hasil dari pengembangan ini adalah terciptanya final media dengan spesifikasi sesuai dengan tujuan afektif dan kognitif, media ini dinyatakan layak oleh ahli media dan pengguna lapangan dengan kriteria kelayakan tinggi dengan rat-rata skor 3,875 dari total skor 4 (3,875/4) untuk validasi game SIPANCA; validasi aplikasi SIPANCA (3,75/4); validasi media perisai SIPANCA berbasis mikrokontroler (3,75/4); uji kepraktisan game SIPANCA (3,875/4); uji kepraktisan aplikasi SIPANCA (3,9375/4); dan uji kepraktisan media perisai SIPANCA berbasis mikrokontroler (3,93/4). Adanya pengembangan model pembelajaran abad 21 berbasis media penanaman karakter bertema nilai-nilai Pancasila dan sadar konstitusi memberikan manfaat teoritik terhadap referensi kajian bidang pendidikan, pembelajaran, dan pengembangan media yang berkaitan dengan strategi pembelajaran di sekolah.
Penggunaan Media Pohon Akar Pangkat Tiga (Pakar Pati) untuk Meningkatkan Kemampuan Berpikir Kritis pada Pembelajaran Matematika
Authors: Subiarto Subiarto
Published: July 2021

Tujuan penelitian ini adalah untuk meningkatkan kemampuan berpikir kritis dan hasil belajar matematika melalui penggunaan media Pakar Pati (Pohon Akar Pangkat Tiga) bagi siswa kelas V SD Negeri 1 Kendaga. Subjek penelitian ini adalah 25 siswa kelas V di SD Negeri 1 Kendaga. Metode yang digunakan dalam penelitian ini adalah metode penelitian tindakan kelas, dengan melakukan dua tindakan dalam dua siklus. Tiap siklus ada empat tahap kegiatan yaitu perencanaan, pelaksanaan, observasi, dan refleksi. Hasil penelitian ini menunjukkan bahwa penggunaan media pohon akar pangkat tiga (Pakar Pati) dapat meningkatkan kemampuan berpikir kritis belajar matematika bagi siswa.kelas V SD Negeri 1 Kendaga. Kemampuan siswa dalam merumuskan masalah, mengumpulkan data, menganalisis, menanyakan dan menjawab pertanyaan, serta melakukan observasi dan memberikan kesimpulan meningkat. Hasil belajar meningkat dalam kemampuan memecahkan masalah dan memahami materi akar pangkat tiga.
Pengaruh Lubang Hopper, Celah Silinder, Panjang Bidang Giling Terhadap Kapasitas Penggiling Jagung Silinder Ganda
Authors: Yokasing Yohanes B. , Abdullah Amiruddin , Hurit Darius Kula
Published: July 2021

Biji jagung kering pada umumnya diolah menjadi beras jagung. Beras jagung dijadikan nasi jagung, atau thiwul jagung. Indonesia memiliki potensi keswasembadaan jagung sebagai pangan, karena memiliki sumber daya alam dan lingkungan agroekologi yang mendukung. Namun teknologi pengolahannya, belum sesuai kebutuhan. Masyarakat mengandalkan teknologi tradisional dan mesin moll. Teknologi tradisional membutuhkan banyak tenaga, dan waktu. Sedangkan mesin moll hasil moll ukuran butir halus, dan membutuhkan biaya tambahan berupa bahan bakar, dan mobilisasi. Maka tahun 2017, dikembangkan, “Penggiling Jagung Silinder Ganda”.  Pengiling jagung silinder ganda, memiliki kapasitas giling sedikit. Untuk itu dilakukan perencanaan ulang pada komponen; luas lubang keluar hopper, celah antara silinder luar dan silinder dalam, dan panjang bidang giling, terhadap kapasitas giling. Penelitian ini bertujuan mengetahui, “Pengaruh luas lubang keluar hopper, celah silinder, panjang bidang giling terhadap kapasitas gilingan. Penelitian dilakukan menggunakan metode kaji tindak. Hasil penelitian menyatahkan bahwa, “Luas lubang keluar hopper, celah antara silinder dan panjang bidang giling, berpengaruh terhadap kapasitas gilingan. Pada luas lubang keluar hopper 600 mm2, dan celah silinder 1,5 mm dan panjang 90 mm, memiliki kapasitas gilingan tertinggi, dibandingkan luas lubang, celah dan panjang  silinder yang lebih luas atau panjang. Hal ini disebabkan oleh meningkatnya gesekan seiring bertambah jumlah biji jagung keluar lubang hopper dan masuk ruang giling, yang menyebabkan berkurangnya kecepatan putar (manual). Untuk meningkatkan kapasitas giling, putaran silinder dalam harus ditingkatkan seiring bertambahnya luas lubang keluar hopper, celah silinder dan panjang bidang giling.
Investigasi Cacat Makro pada Pengecoran Al Si Variasi Holding Time Peleburan
Authors: Dika Johan Wayan , Suwito Abi , Pratiwi Y. R. , Tsamroh Dewi Izzatus
Published: July 2021

Tujuan dari penelitian ini adalah mengetahui bentuk cacat makro akibat holding time pada peleburan coran Al-Si. Metode penelitian yang digunakan dalam penelitian ini adalah rancangan penelitian eksperimental dengan jenis pendekatan kuantitatif. Teknik analisis data yang digunakan dalam penelitian ini adalah analisis deskriptif yang dilakukan dengan cara merangkum hasil penelitian berdasarkan pengamatan yang telah dilakukan. Pengamatan cacat makro diamati dengan foto makro. Secara umum cacat makro yang terjadi adalah lubang jarum, pelekat, rontok cetakan, salah alir dan sumbat dingin. Secara khusus, terjadi cacat porositas pada spesimen dengan variasi holding time peleburan 15, 25, dan 35 menit pada pengecoran logam Al-Si secara berurutan adalah 4,22 %, 3,07%, dan 3,08%.
Kekerasan dan Struktur Mikro Plat Baja Karbon Rendah 0,16% C Hasil Bengkel Las SMAW dengan Elektroda E 309-16 ESAB Posisi Flat 1G setelah Variasi Quenching
Authors: Andrijono Djoko , Widyastuti Ike
Published: July 2021

Hasil penyambungan dengan proses SMAW pada baja karbon rendah disebut daerah lasan yang meliputi:  logam induk, logam lasan dan daerah pengaruh panas yang selanjutnya dilakukan proses pendinginan air, oli SAE 90, udara. Tujuan penelitian mengetahui, membandingkan, menganalisa pengaruh variasi media pendinginan terhadap sifat kekerasan, struktur mikro daerah lasan dan menganalisa sifat mampu las, komposisi kimia logam induk, serta elektroda terumpan. Manfaat penelitian memberikan kontribusi bagi industri manufaktur di bidang proses pengelasan. Hasil penelitian menunjukkan sifat kekerasan logam lasan dan daerah pengaruh panas paling tinggi pada pendinginan air, oli SAE 90 dan terendah pendinginan udara. Logam induk akibat variasi media pendinginan tidak terjadi perubahan sifat kekerasan dan struktur mikro.  Struktur mikro logam lasan, daerah pengaruh panas terbentuk fasa ferit dan perlit setelah pendinginan udara, sedangkan dengan pendinginan air, oli SAE 90 tidak terbentuk struktur martensit melainkan terbentuk fasa ferit dan perlit. Kesimpulan kekerasan logam lasan, daerah pengaruh panas semakin tinggi dengan besar butir semakin halus kecuali logam induk tidak terjadi perubahan kekerasan dan struktur mikro logam lasan, daerah pengaruh panas terbentuk fasa ferit, perlit kecuali logam induk tidak terjadi perubahan struktur mikro dan pada pendinginan oli SAE 90, air tidak terbentuk stuktur martensit.
Influencia de la adicción a las redes sociales en la reprobación escolar de estudiantes de nivel licenciatura
Authors: Amador-Ortíz Carlos Miguel
Published: July 2021

Las redes sociales son herramientas que facilitan la comunicación y el acceso a información, con aplicaciones en diferentes ámbitos. Su uso hace eficiente variados procesos y ayuda a resolver problemas; a su vez, son ampliamente utilizadas con fines recreativos. Sin embargo, un uso desmedido puede generar efectos negativos a los usuarios. El objetivo del presente trabajo fue examinar la relación entre la adicción a las redes sociales y la reprobación escolar en estudiantes universitarios. Se utilizó un cuestionario estandarizado, con una escala de Likert, el cual se aplicó a una muestra de 539 estudiantes universitarios. Los datos fueron analizados con relación a la reprobación, mediante una prueba de hipótesis Chi-cuadrado de Pearson en los totales obtenidos en el cuestionario en baja y alta adicción, y por factores con media y alta adicción. Los estudiantes analizados se categorizaron en adicción baja (57 %), media (36 %) y alta (7 %). Los resultados generales mostraron una relación significativa entre alta adicción y reprobación y, en específico, en los factores obsesión por las redes sociales y uso excesivo de las mismas. No se hallaron asociaciones significativas en el factor falta de control personal y tampoco en los de adicción media y reprobación. Se concluyó que la adicción a las redes sociales tiene un efecto negativo en el rendimiento académico, llegando a impactar en la reprobación escolar de estudiantes universitarios.
Uso de las tecnologías de la información y la comunicación como estrategia para reducir el desperdicio de frutas y verduras
Authors: Muñiz-López Héctor Simón , Uresti-Marín Rocío Margarita , Castañón-Rodríguez Juan Francisco
Published: July 2021

El desperdicio de frutas, verduras y otros alimentos es un problema mundial, que puede disminuir con la utilización de las Tecnologías de la Información y la Comunicación (TIC), en todos los escenarios de los sistemas alimentarios. El propósito de este trabajo fue identificar las TIC que se han propuesto e implementado en el comercio electrónico, en diferentes cadenas alimentarias, como estrategia para reducir el desperdicio de frutas y verduras. Entre las tecnologías revisadas se encuentran: internet de las cosas (IoT), sensores RFID, crowdsourcing, aplicaciones móviles (APP), plataformas web y tecnología de computación en la nube. Las herramientas tecnológicas arrojan información de valor para su análisis y aplicación, por las partes interesadas, para tomar las mejores decisiones y contribuir de mejor manera a la reducción del desperdicio de alimentos y dar respuesta a acciones oportunas, que favorezcan la seguridad alimentaria y nutricional y el cuidado al medio ambiente. Las TIC pueden orientar a los diferentes actores involucrados en los sistemas alimentarios sostenibles. También es factible implementarlas en el comercio electrónico en México, obteniendo beneficios económicos, sociales y medioambientales.
Atributos que influyen en la elección del visitante en cuatro pueblos mágicos del noroeste mexicano
Authors: Almendarez-Hernández Marco Antonio , Ibáñez-Pérez Reyna María , Olmos-Martínez Elizabeth
Published: July 2021

El concepto pueblos mágicos fue ideado para incrementar el turismo. Se concentra en la difusión de actividades atractivas en pequeñas localidades con atributos histórico-culturales que representan la identidad nacional. El objetivo de esta investigación fue estimar la probabilidad de seleccionar un determinado pueblo mágico del noroeste mexicano a partir de factores tales como el perfil del usuario, su experiencia, percepción y satisfacción de los servicios y el gasto efectuado durante su estancia. La metodología utilizada se basa en el modelo econométrico Logit Multinomial y estadística descriptiva con variables de control para su análisis a partir de la aplicación de una encuesta en cuatro pueblos mágicos: Todos Santos y Loreto, de Baja California Sur, y Cosalá y El Rosario, de Sinaloa. Los resultados muestran que las probabilidades condicionadas de escoger uno de ellos son mayores para Todos Santos con 29 %, seguido de Cosalá con 28 %, Loreto con 27 % y, finamente, El Rosario con 16 %. La variación de la elección está en función de las especificidades y características de los destinos. Los resultados del modelo permitirán la planeación de estrategias para mejorar la atención y la promoción turística en los cuatro pueblos mágicos estudiados, basándose en las preferencias de quienes eligen estos destinos, para atraer a más visitantes.
INTRAEMPREENDEDORISMO E GESTÃO PÚBLICA AMOR PLATÔNICO OU POSSÍVEL RELAÇÃO ESTÁVEL?
Authors: Ferreira Felipe , Gimenez Fernando , Valente Daniel
Published: July 2021

Nesta pesquisa buscou-se verificar de que maneira o intraempreendedorismo é percebido pela gestão de uma organização pública federal no Brasil. Para isso, partiu-se do referencial de temas como Estado, Governo e Administração Pública, bem como de Gestões Pública, Estratégica e Empreendedorismo. Além disso, foi realizada pesquisa de campo quali-quantitativa com aplicação de questionários semiestruturados aos gestores de uma instituição pública federal de ensino superior a fim de verificar as ferramentas já existentes que propiciam uma gestão estratégica intraempreendedora. A análise das respostas foi tratada por estatística descritiva e análise de conteúdo (no caso das respostas abertas). Os resultados encontrados apontaram que o fenômeno do intraempreendedorismo é reconhecido como ações ligadas a melhorias, inovação, mudança, busca de resultados e concretização de objetivos, percebido como necessário à melhoria da organização por meio do desenvolvimento de características como pró-atividade, resiliência, inconformismo, entrega de resultados, aprimoramento, networking e profissionalização dos ocupantes de cargos de direção e de ferramentas de gestão. A principal limitação desta pesquisa foi a quantidade baixa de questionários respondidos, sugerindo-se, assim, um trabalho de maior sensibilização para um retorno mais efetivo de respondentes na realização de pesquisas futuras do tema.
O efeito da COVID-19 na estratégia de uma instituição de ensino superior: estudo caso
Authors: Campanella Sancha , Sardinha Luís
Published: July 2021

Enquadramento: A suspensão das atividades presenciais (letivas e não letivas) criou disrupção no desenvolvimento do ano escolar nas Instituição de Ensino Superior (IES), tendo um forte impacto na comunidade académica. Apresentam-se os resultados dos impactos da COVID-19 no Instituto Superior de Administração e Línguas, localizado na ilha da Madeira, Portugal. Objetivo: Avaliar o efeito da pandemia no percurso académico e baseia-se na análise das decisões tomada em plena pandemia, estratégias desenvolvidas e questionários dirigidos à população académica, entre março e abril de 2020. Foram analisadas as perspetivas dos docentes, discentes e pessoal não docente, relativamente aos efeitos desta situação no percurso escolar e nas estratégias desenvolvidas e medidas implementadas. Metodologia: Estudo descritivo, exploratório. Recolha de dados por contacto direto aos dirigentes da IES e questionário online através de uma amostra probabilística por conveniência. Verificou-se que a maioria dos discentes apenas recorria da internet para comunicar ou pesquisa e não tinham ingressado numa formação online. A plataforma escolhida revelou-se adequada às necessidades, traduzindo-se em satisfação. Conclusão: As medidas adotadas foram adequadas para reduzir o impacto da COVID-19 no processo de ensino, aprendizagem e avaliação dos estudantes e para garantir a continuidade e desenvolvimento do ensino e das atividades de investigação. A comunicação foi eficaz.
REPORTING E CONTABILIDADE DE GESTÃO: UMA REVISÃO SISTEMÁTICA DA LITERATURA
Authors: Sampaio Vera , Vieira Anabela , Monteiro Albertina
Published: July 2021

Este trabalho tem como objetivo caracterizar e identificar tendências de investigação científica, publicadas nos últimos 10 anos, sobre o tema do reporting, analisando, em particular, os tópicos abordados e as metodologias aplicadas. Dada a variedade de abordagens científicas sob as quais o tema é estudado, e considerando a própria diversidade das realidades em que o mesmo se desenrola, será feita uma revisão sistemática da literatura. As fontes de recolha de dados foram as plataformas da Web of Science e a SCOPUS. Os resultados indicam que a maioria dos artigos sobre reporting está publicada em revistas da área das ciências sociais e comportamentais e recai predominantemente em países da Europa. Em relação aos tópicos em estudo, sobressaem os estudos dedicados ao papel da contabilidade e controlo de gestão na promoção, medição e auditoria da informação divulgada. A maioria dos trabalhos apresenta abordagens metodológicas mais aplicadas, como por exemplo, o modelo analítico. Apesar das limitações e viés inerentes à metodologia seguida, este estudo reveste-se de grande interesse para académicos que estejam ou pretendam investigar nesta área e para gestores ou profissionais de contabilidade que lidam com estes contextos organizacionais.
Editorial
Authors: Sousa Áurea
Published: July 2021

Editorial
Patrimônio cultural e cat´ástrofe Os concursos internacionais não-oficiais realizados para a Notre Dame de Paris após o incêndio de 2019
Authors: Lupo Bianca
Published: July 2021

O estudo pretende analisar as relações estabelecidas entre arquitetura contemporânea e patrimônio histórico em contextos de catástrofe, tendo como objeto principal o caso da Notre Dame de Paris depois do incêndio ocorrido em 2019. No dia seguinte à tragédia, o primeiro Ministro Edouard Philippe anunciou o possível lançamento de um concurso internacional de arquitetura para reconstruir a catedral a partir de uma “reconstrução inventiva”. Em resposta, arquitetos de todo o mundo publicaram nas redes sociais propostas para a reconstrução da Notre-Dame. Foram realizados dois concursos não-oficiais promovidos pelos websites Freelancer.com e Go Archictect. O Senado reagiu afirmando que a restauração deveria recuperar o último estado visualmente conhecido da catedral. O artigo analisará o conjunto de propostas realizadas para a Notre Dame, sugerindo categorias analíticas para o entendimento dos principais temas projetuais levantados: A Catedral do Futuro; As arquiteturas de outro lugar; A Notre Dame Sustentável; Paris, cidade-luz; O simbolismo da água; A eternização da catástrofe; As novas tecnologias.
Bumba meu boi do Maranhão FOl
Authors: Martins Carolina
Published: July 2021

O Bumba meu boi é uma manifestação cultural presente no estado do Maranhão - no nordeste do Brasil - e considerada Patrimônio Cultural Imaterial da Humanidade pela UNESCO desde 2019. Neste artigo, apresento, a partir de uma perspectiva histórica, o processo de valorização deste folguedo, que atravessou momentos – cheios de idas e vindas - de repressão, negação, aceitação e valorização por parte do poder público, da polícia e da imprensa e o papel dos intelectuais folcloristas para o destaque que o Bumba passou a receber, sobretudo, a partir da segunda metade do século XX. Procuro compreender como as discussões sobre o folclore e a identidade maranhense foram importantes para a escolha do Bumba como a expressão da cultura popular maranhense, que resultou em sua patrimonialização.
FIGURAÇÕES DO FEMININO NA EMBLEMÁTICA HISTÓRIA DA ILUSTRE MAGALONA ESTADO DA ARTE
Authors: Quintela Vilma
Published: July 2021

O artigo em tela contém as linhas gerais de uma pesquisa em fase inicial, a ser desenvolvida em torno de um romance antigo, popularizado, na Europa, a partir do século XVI. Situado na época das Cruzadas Cristãs, o romance da bela Magalona – ou a “História da princesa Magalona” para apenas citar um dos títulos com os quais ele se tornou conhecido em língua portuguesa– teve diversas versões e reimpressões em França, Espanha e Portugal. De existência longeva, esse romance está entre um dos mais populares dentre os títulos enviados ao Brasil por livreiros portugueses por volta do século XVIII, encontrando-se, ainda hoje, no repertório da literatura de cordel em circulação no país. Esta investigação se situa no locus interdisciplinar dos estudos sobre a poesia oral e a narrativa popular tradicional ou tradicionalizada, e desenvolve-se como trabalho de pós-doutoramento no CICS.NOVA – Centro Interdisciplinar de Ciências Sociais da Universidade Nova de Lisboa.
Learning Needs Analysis: Thematic Teaching Book Based on HOTS Assisted with 3D Stereoscopic Images to Improve Critical Thinking Ability of Elementary School Students
Authors: Permana Dede , Utomo Utomo
Published: July 2021

This study is descriptive explorative which aims to see the needs of teachers and students in implementing High Order Thinking Skills (HOTS) based learning in thematic learning. The research objectives were achieved through observation, interviews and document study. The results of observations show that in learning students have problems with learning interest, this can be seen when students do activities that are not related to learning. Meanwhile, the results of the interviews which were supported by document study data revealed that in the thematic book the conceptual presentation was not given in depth. It is necessary to add various activities that support the student learning process. In addition, the teacher argues that it is necessary to provide pictures as an illustration of the teaching concept given, this is because elementary school students are in the 7-11 year age range who are still in the concrete operational thinking stage which requires textbooks that can present abstract concepts. concretely. Based on this, it is natural that students are not interested in participating in learning. This study concludes that the thematic textbooks currently used have shortcomings in the presentation of HOTS material and supporting activities. To cover these shortcomings, it is necessary to develop thematic books that have a more complete concept of material and are made according to the characteristics of elementary school students and contain various activities to support HOTS ability improvement. The development of textbooks is needed as an effort to increase learning interest so that learning objectives can be maximally achieved.
Students' High-Level Thinking Ability In Learning Mathematics In The Era Of Pandemic Covid-19
Authors: Yazidah Nok Izatul , Argarini Dian Fitri , Sulistyorini Yunis
Published: July 2021

High-level thinking skills are an ability that students must have to support how students can think creatively and critically. But what about the learning process in the Covid-19 pandemic era, which can still pay attention to students' higher-order thinking skills. This study aims to describe the learning process in the Covid-19 era in junior high schools in Malang district, and how the students' high-level thinking skills. The data collection methods used were interviews and tests. The research data obtained during the study shows that teachers have maximized the use of online learning platforms to support the virtual learning process recommended by the government. In addition, it was found that the high level thinking ability of junior high school students in Malang district had met the minimum standard set by the researcher at 75%.
Application of Problem-Based Learning to Enhance Students Learning Outcomes in Basic Competencies of Maintaining Brake Systems
Authors: Reinsini Christian E. , Susila I Wayan , Cholik Muhammad
Published: July 2021

The purpose of this study was to determine the effect of the application of problem-based learning to improve student learning outcomes in the subject of Basic Competencies for Maintaining Brake Systems at SMK Negeri 2 Kupang. This study used a 2x2 factorial research design with experimental methods with a quantitative approach, consisting of two classes: the experimental and control classes. The control class is taught using a direct learning model, and the experimental class is taught using a problem-based learning model. The research sample was 70 students, 36 students from TKR 2 class (experiment class), and 34 students from class XI TKR 3 (control class). The instrument used consisted of a questionnaire of analytical skills, a test of learning outcomes in the cognitive domain, affective domain, and psychomotor domain. This study's results indicate that (1) student learning outcomes using problem-based learning models are significantly higher than learning outcomes for students who use the direct learning model; (2)  the learning outcomes of students who have high analytical skills are significantly higher than the learning outcomes of students who have low analytical skills; and (3) there is an interaction between the use of problem-based learning models and direct learning models on learning outcomes in the basic competency subject of the brake system at SMKN 2 Kupang.
Factors Affecting Employability Skills of Beauty Students in Gerbang Kertosusila
Authors: Ningsih Amina , Hariadi Eko , Marniati Marniati , Rijanto Tri
Published: July 2021

There is currently an imbalance between the skills mastered by vocational high school graduates with the skills needed in the labor market, especially employability skills, to maintain a job in various conditions and job requirements. This study aimed to examine the factors that affecting the employability skills of Beauty students namely career guidance, fieldwork practices, emotional intelligence, and self-efficacy. The respondents consisted of 254 students in Beauty Expertise Program at Gerbang Kertosusila. The instruments used in this study were questionnaire with a Likert scale and the statistical method using structural equation modeling (SEM). This study found no significant effect of career guidance, fieldwork practice, emotional intelligence, and self-efficacy on employability skills among Beauty students. The study also showed that career guidance and emotional intelligence have no significant effect on self-efficacy. However, fieldwork practice has a significant effect on the self-efficacy of Beauty students.
Education Planning and Its Implications for Education Policy during the Covid-19 Pandemic
Authors: Ismail Feiby , Pawero Abdul Muis Daeng , Umar Mardan
Published: July 2021

Indonesian education during the Covid-19 era entered a different situation. The real situation has long been predicted by technology experts that all areas of life will enter the realm of digital technology-based activities, including education. For this reason, education in Indonesia must be able to find new directions for education in formulating policies to be taken. One of the important things that must be prepared is at the education planning level. The problem that needs to be studied is how educational institutions formulate educational program planning during the Covid-19 pandemic while maintaining the quality of education. Educational planning carried out by educational institutions must reflect the existence of a vision, mission, goals and work plans, as raw materials or a reference for educational policies at the managerial level. This paper will discuss the education planning process in terms of its implications for quality-oriented education policy during a pandemic.
The Effect of Internal Communication on the Performance of Educational Personnel at the Cirebon Maritime Academy
Authors: Siagian Fereddy
Published: July 2021

The purpose of this study is to find out and analyze the effect of internal communication on the performance of educational staff. This type of research uses descriptive and quantitative research. The population in this study amounted to 102 people, using the Slovin formula obtained a sample of 51 people with a simple random sampling technique. The testing instrument uses a validity test and a reliability test. While the data analysis technique used is a simple regression analysis with the t test and the coefficient of determination test. From the results of the research data obtained values for internal communication variables of (9,852) > (2,011) with a sig value of 0,000 < from the value of 0.05. Meanwhile for the R Square value obtained a result of 0.669, meaning that the change in the performance of the teaching staff at the Cirebon AMC Educational Institution was 66.9% influenced by internal communication while the remaining 33.1% was caused by other variables not examined. The conclusion of this study is that internal communication greatly influences the performance of educational staff in the work environment of the Cirebon AMC Educational Institution. good to better demonstrate the success of the Cirebon Maritime Academic Educational Institute.
Optimum Temperature and Time for Acid Hydrolysis in Reducing Sugar Manufacturing from Arabica Coffee Cascara with Response Surface Methodology (RSM)
Authors: Suryati S , Meriatna M , Masrullita M , Safriwardy Ferri , Ardiansyah Ardiansyah
Published: July 2021

This research aims to utilize the Arabica coffee cascara waste as a resource for reducing sugar production, including the investigation on the temperature and time required of the acid hydrolysis. The samples were initially pretreated (drying and milling), followed by delignification with the organosolv technique using alcohol. Then, the hydrolysis was carried out using sulfuric acid (1%) at a particular temperature (95, 100, and 105 °C) and time (2, 4, and 6 h) variations. Yield percentage, density, and reducing concentration were analyzed in each trial to generate a response surface methodology model. Based on the results, the hydrolysis can be optimized at 96.46 °C for 2.59 h, yielding 16.7696% reducing sugar.
CROP DIVERSIFICATION IS ONE OF THE REFERENTIAL PATTERNS FOR ENHANCED CROP PRODUCTION: A SECONDARY STUDY ON PURBA & PASCHIM MEDINIPUR DISTRICT IN WEST BENGAL
Authors: Jana Kajalbaran
Published: July 2021

Crop diversification is a planned innovative approach to maximize land usage with optimum crop production to aim at minimizes losses of seasonal and other impacts on crop. India being one of the biggest countries of agricultural economy and West Bengal, although tiny in size, is one of the biggest producers of few agricultural produces like rice, potato, oil seed etc. Within West Bengal, undivided retained a significant role in agricultural produce. After division of the district in to & during 2000, most of the cultivable land is within . has some pocket areas that has good reputation of cultivation. The Crop diversification is the need for the hour for small cultivable area. In this particular scenario, this study has tried to focus on the state of crop diversification in the district with a comparative study on district because of its history of its erstwhile geographical tie up. At the same time, it has also attempted to find out the effect of crop diversification on crop production. In this particular aspect this study has focused on the condition of this particular aspect on undivided district also. It has found that crop diversification on the basis of principal food crop in district has significantly positive relationship with production but has insignificant negative relationship in between crop diversity of rice with its production. In undivided there has been positive relationship between crop diversity and crop production in both principal food crops and rice. This has attracted to conclusive remark that division of district has impaired the scope of crop diversification of district but it has sufficient space to improve it as the relationship has indicated positive direction to that end although negative direction in rice crop would be matter further research.