bluuebunny/crossref_metadata_2025 huggingface dataset:
Rheological and Rheo-optical Behaviors of Nanocellulose Suspensions Containing Unfibrillated Fibers
Authors: Yamagata Yoshifumi , Niinobe Shingo , Suga Kotaro , Miyamoto Keisuke
Published: July 2021

Cellulose nanofibers (CNFs) produced by mechanical processing have a more uneven fiber shape, diameter, and length than those produced by chemical processing. Depending on the manufacturing conditions, CNFs containing insufficient fibrillated fibers may be produced. In order to find practical applications for CNFs containing unfibrillated fibers, it is important to understand how to control the rheological behavior of these systems. In this study, we investigated the relationship between the nanosized volume fraction and the rheological behaviors of CNF suspensions containing unfibrillated fibers prepared by a wet refining system (Water Jet System). The macroscopic structural changes in those suspensions under shear flow were also discussed based on rheo-optic measurements. According to the frequency sweeps of the CNF suspensions, it was found that they were elastic-dominated gels, and the elasticity was attributed to the nanofibers. The elastic moduli increased with the volume fraction of the nanofibers, suggesting that the entanglement of the nanofibers was enhanced. The pseudo-plateau modulus Gp' is proportional to the nanofiber volume fraction, with the constant α = 1.5, suggesting that the entropic elasticity is dominant. The viscosity curves of the CNF suspensions showed a shear thinning behavior, in which the viscosity linearly decreased with the increasing shear rate. From the Rheo-SALS measured at the same time, we found that the aggregates of the nanofibers elongated in the flow direction and deformed into an elliptical shape with the applied shearing. The shape change of the aggregates comprised of the nanofibers became more pronounced with the increased nanofiber volume fraction. However, the effect of the shape change of the aggregates was hardly observed on the viscosity curve. We speculate that this is due to the fact that the unnanosized fibers, which exhibit a Newtonian flow, play a significant role in the flow behavior of the CNF suspensions.
Dynamic Analysis of a Plankton-Herbivore State-Dependent Impulsive Model With Action Threshold Depending On The Density and Its Changing Rate
Authors: Li Wei , Zhang Tonghua , Wang Yufei , Cheng Huidong
Published: July 2021

A plankton-herbivore state-dependent impulsive model with nonlinear impulsive functions and action threshold including population density and rate of change is proposed. Since the use of action threshold makes the model have complex phase set and pulse set, we adopt the Poincaré map as a tool to study its complex dynamics. The Poincaré map is defined on the phase set and its properties in different situations are analyzed. Furthermore, the periodic solution of model are discussed, including the existence and stability conditions of the order-1 periodic solution and the existence of the order-k (k ≥ 2) periodic solutions. Compared with the fixed threshold in the existing literature, our results show that the use of action threshold is more practical, which is conducive to the sustainable development of population and makes people obtain more economic benefits. The analysis method used in this paper can study the complex dynamics of the model more comprehensively and deeply.
Food prices in a pandemic: Global data show higher costs for nutritious food groups
Authors: Bai Yan , Costlow Leah , Ebel Alissa , Laves Sarah , Ueda Yurika , Volin Natalie , Zamek Maya , Masters William
Published: July 2021

The COVID pandemic has cut lives, livelihoods and supply chains, leading to price spikes for some foods and decline for others. We compare monthly retail food prices in up to 180 countries through February 2021, and find significant rises for more nutritious food groups with higher case counts. Prices by food group complement data on farm commodity prices and overall consumer price indexes, and can help guide policy for resilience and response to shocks.
Tuning the Structural Isomers of Phenylenediammonium Cations to Afford Efficient and Stable Perovskite Solar Cells and Modules
Authors: Liu Cheng , Yang Yi , Rakstys Kasparas , Mahata Arup , Franckevicius Marius , Mosconi Edoardo , Skackauskaite Raminta , Ding Bin , Usiobo Onovbaramwen Jennifer , Audinot Jean-Nicolas , Kanda Hiroyuki , Driukas Simonas , Kavaliauskaite Gabriele , Gulbinas Vidmantas , Dessimoz Marc , Getautis Vytautas , De Angelis Filippo , Ding Yong , Dai SongYuan , Dyson Paul , Nazeeruddin Mohammad Khaja
Published: July 2021

Organic halide salt passivation is considered to be an essential strategy to reduce defects in state-of-the-art perovskite solar cells (PSCs). This strategy, however, suffers from the inevitable formation of in-plane favored two-dimensional (2D) perovskite layers with impaired charge transport, especially under thermal conditions, impeding photovoltaic performance and device scale-up. To overcome this limitation, we studied the energy barrier of 2D perovskite formation from ortho-, meta- and para-isomers of (phenylene)di(ethylammonium) iodide (PDEAI2) that were designed for tailored defect passivation. Treatment with the most sterically hindered ortho-isomer not only prevents the formation of surficial 2D perovskite film, even at elevated temperatures, but also maximizes the passivation effect on both shallow- and deep-level defects. The ensuing PSCs achieve an efficiency of 23.9% with long-term operational stability (over 1000 hours). Importantly, a record efficiency of 21.4% for the perovskite module with an active area of 26 cm2 was achieved.
Reasearch of The Effect of Graphene Nanoparticles and Sulfurized Additives to MQL for Machining of Ti-6Al-4V
Authors: Wang Ben , Yang Quanwei , Deng Jiawei , Hou Ning , Wang Xuezhi , Wang Minghai
Published: July 2021

given its favourable comprehensive properties, titanium alloy has been extensively developed and used in numerous fields. However, its low thermal conductivity and strong chemical activity have led to its reputation as a difficult-to-machine material. Thus, graphene nanoparticles and sulfur-based extreme pressure (EP) additive were added to rapeseed oil to increase the lubrication and cooling properties of the machining region. In this study, three lubricants were used to machine titanium alloy: rapeseed oil+graphene+sulfur-based EP additive, rapeseed oil+sulfur-based EP additive, and rapeseed oil; and the subsequent wear of cutting tools, cutting temperature, surface roughness, and cutting force were compared. The most favourable results were found for the combination of rapeseed oil+graphene+sulfur-based EP additive, effectively decreasing the temperature of the cutting area and wear of cutting tools. In comparison with rapeseed oil, the flank wear value decreased by 56.4%. Similarly, the surface roughness and cutting force with the rapeseed oil+graphene+sulfur-based EP additive were lowest, showing a decrease of 36.1% and 27.0% respectively when compared with rapeseed oil.
Analysis of the Optical Quartz Lens Centering Process Based on Acoustic Emission Signal Processing and the Support Vector Machine
Authors: Liu Chun-Wei , Shiu Shiau-Cheng , Yu Kai-Hung
Published: July 2021

A method was proposed for analyzing the optical glass lens centering process, and experiments on biplane quartz lenses were performed to determine the material removal rate (MRR) for the hard, brittle material. This study used acoustic emission–sensing technology to monitor the MRR and reconstruct the original shape of the lens. The MRR was evaluated, and an error of 17.87% was obtained. A Taguchi experiment was combined with signal analysis to optimize the process parameters, and a support-vector machine was trained to classify the quality of the grinding wheel; the model had accuracy 98.8%. By using the proposed analysis method, workpiece quality was controlled to an edge surface roughness of <2 μm, a lens circularity error of <0.01 mm, a crack length of <E0.1, and an optical axis error of <150 μrad.
Rationale and Design of a Study to Test the Effect of Personal Protective Aids on Hypertension and Diabetes in People Living with High Levels of Air Pollution (Clinicaltrials.Gov Identifier NCT04854187)
Authors: Barbhaya Dweep , Tran Jennifer , Khetan Aditya , Hejjaji Vittal , Jain Supreme , Chan Chee , Goel Anubha
Published: July 2021

Background:Air pollution is the largest environmental cause of disease and premature death in the world today, disproportionally affecting low-middle-income countries(LMIC) such as India. Studies have shown that exposure to particulate matter <2.5 µm(PM2.5) can contribute to cardiovascular disease and increase mortality. We hypothesize that the use of personal protective aids (home indoor air-purifiers/N-95 masks) can decrease systolic blood pressure(SBP) in people with hypertension and decrease fasting blood glucose(FBG) in those with diabetes.Method:This is a prospective randomized cross-over study in Dalkhola, India- an area of high ambient PM2.5 levels. Participants between 18-70 years of age with hypertension (n=130) and diabetes (n=33) will be invited to participate in the study. They will be randomized to either an intervention or control arm for 4 weeks, after which they will cross over to the other arm following a 2-week washout period. The intervention will consist of using an indoor air-purifier at night and N-95 mask when outdoors. The control period will involve using an identical air purifier and N-95 mask, with the filter removed (sham filtration). Participants and outcome assessors will be blinded to study arm assignment. Outcome evaluation: The primary outcome of the study is the absolute reduction in SBP among people with hypertension and absolute reduction in FBG among people with diabetes. Discussion:This is the first randomized controlled trial to evaluate the use of personal protective aids as a therapeutic measure in people with hypertension and diabetes exposed to high levels of PM2.5. Given the high burden of air pollution in LMICs, there is an urgent need for adaptation measures targeting people at high risk for mortality from this exposure. The results of our study will demonstrate if personal protective aids can be a viable adaptation measure for people living with hypertension and diabetes in areas with a high burden of air pollution.
A case control study of modifiable risk factors of low birth weight among full term babies at Omdurman maternity hospital, Khartoum, Sudan 2019
Authors: Abdullah Ethar
Published: July 2021

Low birth weight (delivery of an infant with less than 2500 grams) is owed to two main causes, either IUGR or pre-term delivery. It makes the newborn susceptible to many health issues from birth and through the adulthood life. Whoever IUGR is the leading cause of LBW in developing countries, and hence it is more reliable here in Sudan to study the risk factors that lead to it which are whoever mostly modifiable. This is a hospital based unmatched case-control study. A total of 134 (67 cases and 67 controls) mothers and their full-term newborn infants were included in the study. The participants were interviewed with a questionnaire and anthropometric measurements were obtained at the end of the interview. The data was analyzed using SPSS and Odd ratios of the risk factors were calculated. The main risk factors that found to influence the birth weight of our study participants were lack of maternal education, rural place of residence, bleeding during pregnancy, high blood pressure during pregnancy, inadequate spacing, lack of ANC follow up, not having iron supplementation and exposure to passive smoking during pregnancy.
Predominance of SARS-CoV-2 P.1 (Gamma) lineage inducing the recent wave in southern Brazil and the finding of an additional S: D614A mutation
Authors: Demoliner Meriane , Silva Mariana Soares da , Gularte Juliana Schons , Hansen Alana Witt , de Almeida Paula Rodrigues , Weber Matheus Nunes , Heldt Fágner Henrique , Silveira Flávio , Filippi Micheli , Pereira Vyctoria Malayhka de Abreu Góes , Silva Francini Pereira da , Mallmann Larissa , Fink Pietra , Valim Andréia Rosane de Moura , Possuelo Lia Gonçalves , Fleck Juliane Deise , Spilki Fernando Rosado
Published: July 2021

Since the first SARS-CoV-2 case in China in late 2019, this virus continues to impact many countries worldwide. Recently, the highest wave of SARS-CoV-2 epidemic was registered in Rio Grande do Sul (RS) State, Southern Brazil, considering the number of cases, deaths and hospitalization per day caused by COVID-19. In this study we described which lineages were circulating in the beginning of 2021 in southern Brazil to understand the cause of the highest health crisis caused by SARS-CoV-2 in the region, searching also possible additional SARS-CoV-2 sequence mutation. A total of 71 positive SARS-CoV-2 samples collected between December 15th, 2020, until April 23rd, 2021, were selected to sequencing. The samples were from 16 cities distributed in three RS regions. The library preparation was performed according to QIAseq® SARS-CoV-2 Primer Panel Handbook kit, and phylogenetic analysis was realized. Whole genome sequencing of 71 SARS-CoV-2 samples shows a predominance of Gamma lineage (67.14%, 47/71), followed by Zeta lineage (27.14%, 20/71) and B.1.1.28 (5,71%, 4/71). Two Gamma lineage consensus sequences presented a D614A mutation. Newly mutations could be emerging due the quick SARS-CoV-2 spreading. Thus, the greater understanding about immune protection and variants vigilance is essential to the better management of the health SARS-CoV-2 crisis.
Evsel Katı Atık Yönetim Senaryolarının Yaşam Döngüsü Analizi: Melikgazi İlçesi (Kayseri) Örneği
Authors: IRBAŞ Emine , DADASER-CELİK Filiz
Published: July 2021

Nüfus artışı ve teknolojik gelişmeler nedeniyle katı atık üretimi hızla artmaktadır. Katı atıklardan kaynaklanan olumsuz etkileri azaltmak için atık yönetiminde çevresel sürdürülebilirliği de dikkate alan entegre yönetim yaklaşımlarının geliştirilmesi büyük önem arz etmektedir. Yaşam döngüsü analizi bir ürün veya hizmetin çevresel etkilerinin değerlendirilmesi için kullanılabilecek araçlardan biridir. Bu çalışmada, Kayseri İli Melikgazi İlçesi’nde evsel katı atık yönetimi için seçilmiş alternatif yaklaşımlar yaşam döngüsü analizi kullanılarak incelenmiştir. Katı atık yönetim alternatifleri olarak dört adet senaryo belirlenmiştir. Senaryo 1, atıkların toplanması, depo sahasına taşınması ve düzenli depolanmasını içermektedir. Senaryo 2’de geri dönüşebilir atıklar kısmen kaynakta ayrıştırılmakta ve kalan atıklar ise düzenli depo sahasına taşınarak, depolanmaktadır. Senaryo 3’te geri dönüşebilir atıkların tamamı kaynakta ayrıştırılmakta ve diğer atıklar ise düzenli depo sahasına taşınmakta ve depolanmaktadır. Senaryo 4’te ise geri dönüşebilir atıkların tamamının kaynakta ayrıştırılması sonrası kalan atıkların %50’si kompostlama ve %50’si düzenli depolama ile bertaraf edilmektedir. Bu senaryolar yaşam döngüsü analizinde değerlendirilirken, hesaplama yöntemi olarak IWM (Integrated Waste Management-Entegre Atık Yönetimi) modeli kullanılmıştır. Çalışmada, tüm senaryolar için net enerji kullanımı / yenilenemeyen enerji kaynakları tüketme potansiyeli (GJ), küresel ısınma potansiyeli (kg CO2-eşdeğeri), asidifikasyon potansiyeli (kg SO2-eşdeğeri) ve ötrofikasyon potansiyeli (kg O2-eşdeğeri) hesaplanmıştır. Melikgazi Belediyesi için Senaryo 3 ve Senaryo 4’ün hem enerji tüketimi hem de çevresel etkileri açısından diğer alternatiflere göre daha avantajlı olduğu tespit edilmiştir. Geri dönüşebilir atıkların kaynakta ayrıştırılması çevresel etkilerin azaltılmasında etkili olmuştur. Ayrıca kompostlama uygulaması düzenli depolamaya nispeten daha az çevresel etki oluşturmuştur.
Diyarbakır İstasyonunda 1929–2016 Boyunca Tarihsel Kuraklığın Yenilikçi Şen Yöntemi ile Trend Analizi
Authors: GÜMÜŞ Veysel , DİNSEVER Latif Doğan , ŞİMŞEK Oğuz
Published: July 2021

Bir doğal afet olarak kuraklık; su temini, hidroelektrik üretimi, tarım ve sanayi gibi çeşitli sektörleri etkilemektedir. Su kaynaklarının etkin ve verimli kullanılması açısından, kuraklığın zamansal değişiminin belirlenmesi önem arz etmektedir. Bu çalışmada, Diyarbakır ilindeki meteoroloji gözlem istasyonunda 1929-2016 yılları arasında ölçülmüş aylık toplam yağış verileri kullanılarak kuraklık analizi yapılmıştır. Kuraklık analizinden önce verilerin homojenliği kontrol edilmiştir. Kuraklığın belirlenmesinde, Standartlaştırılmış Yağış İndeksi (SYİ) yöntemi kullanılmış ve 1, 3, 6 ve 12 aylık zaman ölçeklerinde meydana gelen tarihsel kuraklık indis değerleri belirlenmiştir. Farklı zaman ölçeklerine göre hesaplanan kuraklık indis değerlerinin trendini belirlemek için Yenilikçi Şen Yöntemi (Innovative Trend Analysis-ITA) kullanılmıştır. Çalışmada, 1, 3, 6 ve 12 aylık zaman ölçekleri için en kurak periyodlar sırasıyla 8, 18, 21 ve 53 ay olarak belirlenmiştir. 1 aylık zaman ölçeğinde (SYİ-1) kurak dönem meydana gelme oranı %40 iken, diğer zaman ölçeklerinde bu değerin yaklaşık %50 olduğu, ayrıca üç aylık (SYİ-3), altı aylık (SYİ-6) ve 12 aylık (SYİ-12) için orta kurak ve üzeri kuraklık meydana gelme oranının %15-16.5 arasında değiştiği görülmüştür. Yenilikçi Şen Yöntemi ile kuraklık indislerinin trendi incelendiğinde ise, özellikle SYİ-12 için 0.8’den büyük indis değerlerinde zayıf bir azalma eğilimi, orta nemli sınıfa giren indis değerlerinde ise %5 üzerinde bir azalma eğilimi belirlenmiştir. Ayrıca, SYİ-12 değerlerinde -3 ve -3’ten küçük indis değerlerinin güçlü bir artış (%10 ve üzeri) eğilimi gösterdiği, yani aşırı kurak durumun son yıllarda azaldığı tespit edilmiştir.
Transformation of Fe-bearing minerals from Dongsheng sandstone-type uranium deposit, Ordos Basin, north-central China: Implications for ore genesis
Authors: Yue Liang , Jiao Yangquan , Fayek Mostafa , Wu Liqun , Rong Hui , Xie Huili
Published: July 2021

Iron-bearing mineral assemblages and their distribution patterns directly reflect the redox environment in sediments, which plays a decisive role in the migration and precipitation of U. The Dongsheng sandstone-type U deposit hosted in fluvial and/or deltaic sandstones of the lower member of the Middle Jurassic Zhiluo Formation in the northeastern Ordos Basin has experienced multiple fluid events that impacted the redox conditions. Highly enriched in barren gray sandstones, pre-ore U (Umean = 12.05 ppm) associated with Fe-Ti oxides, clay minerals, and organic matter is likely one of the key sources of U for the mineralization. Different contents of Fe-bearing minerals, including biotite, Fe-Ti oxides, pyrite, hematite, goethite, and chlorite that were formed or altered under different redox conditions, resulted in sandstone units with distinct colors. The red sandstone is hematite-rich, indicating a highly oxidizing environment. The green sandstone is chlorite-rich and formed because of reducing hydrocarbon-rich fluids that overprinted the hematite-rich sandstone. The barren and mineralized gray sandstones consist of pyrite (with a higher content in mineralized sandstones), Fe-Ti oxides, and carbonaceous debris, which are indicators of a reducing environment. Based on the paragenetic relationship and sulfur isotopic compositions of ore-stage pyrite, bacterial sulfate reduction was responsible for the formation of framboidal pyrite (δ34S = –31.2 to –3.8‰), and the sulfur of this pyrite mainly came from the oxidation of pre-ore pyrite (δ34S = –19.1 to +20.3‰). Euhedral and cement pyrite overprinting framboids were produced via Ostwald ripening with δ34S values ranging from –56.9 to –34.3‰, lower than any values of framboidal pyrite. Therefore, these mineralogical and geochemical characteristics of the Dongsheng deposit suggest U mineralization involves both biogenic and abiogenic redox processes.
Reexamination of the structure of opal-A: A combined study of synchrotron X-ray diffraction and pair distribution function analysis
Authors: Lee Seungyeol , Xu Huifang , Xu Hongwu
Published: July 2021

The structure of opal-A was not fully understood due to its poorly crystalline nature. To better understand its structural characteristics, we have analyzed opal-AN (amorphous-network) and opal-AG (amorphous-gel) using synchrotron X-ray diffraction (XRD), pair-distribution function (PDF) analysis, and transmission electron microscopy (TEM). Opal-AN mainly exists as an aggregation of different sizes of nanospheres (<5 nm) generating banded features, whereas opal-AG displays close-packed silica nanospheres with a diameter of ~400 nm. TEM energy-dispersive X-ray spectroscopy (EDS) indicates that Na, Al, K, and Ca are present as trace elements in opal-AN and opal-AG. XRD patterns of both samples show one prominent peak at ~4.0 Å, together with broad peaks at ~2.0, ~1.45, and ~1.2 Å. Previous studies only identified the ~4.0 Å diffraction peak for the definition of opal-A. Hence, opal-A needs to be redefined by taking into account the newly observed three broad peaks. PDF patterns of opal-AN and opal-AG reveal short-range atomic pairs (<15 Å) with almost identical profiles. Both phases exhibit Si-O correlation at 1.61 Å and O-O correlation at 2.64 Å in their [SiO4] tetrahedra. The currently accepted opal structure is disordered intergrowths of cristobalite- and tridymite-like domains consisting of six-membered rings of [SiO4] tetrahedra. Our PDF analyses have identified additional, coesite-like nanodomains comprising four-membered [SiO4] rings. Moreover, we have identified eight-membered rings that can be generated by twinning and stacking faults from six-membered rings. The coesite nanodomains in opal-A may be a precursor for coesite micro-crystals formed by the impact of supersonic micro-projectiles at low pressures. More broadly, our study has also demonstrated that the combined approach of synchrotron XRD/PDF with TEM is a powerful approach to determine the structures of poorly crystallized minerals.
Pendeteksi Kecelakaan Lalu Lintas Menggunakan Akselerometer dan GPS Location pada Aplikasi Android
Authors: Finlando Marcellinus Julian , Nugraha Kristian Adi , Saputra Laurentius Kuncoro Probo
Published: July 2021

Kecelakaan kendaraan merupakan hal yang pastinya dihindari semua orang. Kecelakaan kendaraan tidak hanya menyebabkan korban luka-luka, tetapi dapat juga menyebabkan kematian, dan menyebabkan kerugian lain seperti kerugian materi. Dalam kecelakaan kendaraan terdapat peranan penting orang-orang di sekitar, pihak yang berwenang, dan bahkan keluarga untuk menolong korban kecelakaan. Menjadi sebuah permasalahan tersendiri apabila orang-orang tersebut tidak dapat dihubungi oleh korban, dikarenakan korban sudah tidak dapat memegang smartphone karena dalam kondisi yang tidak memungkinkan seperti cidera fisik atau bahkan tidak sadarkan diri. Selain itu terdapat faktor lain seperti orang-orang yang tidak peduli karena tidak tahu ada korban kecelakaan. Dengan memanfaatkan smartphone android yang digunakan oleh sebagian besar masyarakat, maka dapat dirancang dan dibuat sistem deteksi kecelakaan kendaraan pada aplikasi android. Aplikasi tersebut menggunakan sensor akselerometer dan GPS Location sebagai variabelnya dalam mendeteksi kecelakaan. Apabila sistem mendeteksi kecelakaan, maka sistem akan langsung mengirimkan pesan kepada seluruh pengguna aplikasi yang sudah terdaftar. Pesan tersebut berupa lokasi korban kecelakaan, sehingga para pembacanya dapat langsung mengakses lokasi korban via Google Map dari pesan tersebut. Aplikasi ini dapat memudahkan orang-orang di sekitar, kerabat atau pihak yang berwenang untuk dapat mengetahui lokasi kecelakaan kendaraan. Sehingga jika ada kecelakaan kendaraan, maka diharapkan orang-orang yang sudah memiliki dan terdaftar pada aplikasi tersebut dapat menolong korban kecelakaan dan menanganinya secara cepat.
Analisis Faktor Optimasi untuk Data Warehouse dengan Data Tabungan pada Bank XYZ
Authors: Herfangsyah Aloysius Adhyatma , Raharjo Willy Sudiarto , Chrismanto Antonius Rachmat
Published: July 2021

Berkembangnya proses teknologi informasi dimanfaatkan oleh banyak perusahaan untuk meningkatkan kinerja bisnisnya, yaitu dengan cara penyajian data yang terintegrasi dan konsisten. Data warehouse merupakan suatu ilmu yang menunjang proses analisis perusahaan, dengan cara menyediakan data yang terintegrasi dari berbagai sumber basis data. Seiring dengan bertambahnya jumlah dan kompleksitas data, perusahaan yang menggunakan media komputer untuk menyimpan datanya akan memerlukan resource yang lebih banyak dari tahun sebelumnya. Pemprosesan data yang banyak ini tentunya memerlukan media penyimpanan berupa basis data yang optimal, sehingga proses analisis dari perusahaan tersebut dapat berjalan secara cepat dan efisien. Pada penelitian ini, penulis akan membangun data warehouse dengan membuat tabel kondisi awal, membuat mapping untuk memasukkan data-data yang diperlukan, membuat tabel optimasi dengan 7 kondisi yang berbeda dari kombinasi partisi, bucketing, dan kompresi, lalu menganalisis performa dari tabel tersebut menggunakan query yang akan sering digunakan untuk analisis sederhana. Performa yang akan dianalisis pada penelitian ini adalah dari segi waktu jalan query dan ruang penyimpanan yang digunakan oleh masing-masing tabel. Berdasarkan pengujian dari penelitian ini dengan menggunakan 3 query, dihasilkan kesimpulan bahwa penggunaan partisi dan bucketing mempercepat rata-rata jalannya query sebesar 28%, sementara penggunaan kompresi data mempengaruhi rata-rata ukuran ruang penyimpanan data sebesar 8 hingga 30 kali lebih kecil jika dibandingkan dengan tabel yang tidak dikompresi, namun penggunaan kompresi ini memperlambat rata-rata jalannya waktu query sebesar  77% atau sekitar hampir dua kali lipat.
Inhibición de la respuesta: Entrenamiento y efectos vinculados al nivel inhibitorio de base, en niños
Authors: Aydmune Yesica , Introzzi Isabel , Comesaña Ana , Lipina Sebastián
Published: July 2021

Desde el enfoque no-unitario de la inhibición, se identifican tres procesos inhibitorios: inhibición perceptual, cognitiva y de la respuesta. Esta última permite suprimir conductas prepotentes e inapropiadas para los objetivos en curso. En los últimos años se evaluaron diferentes intervenciones orientadas a optimizar la inhibición de la respuesta durante los inicios de la escuela primaria; sin embargo, los estudios resultan insuficientes para evaluar la eficacia de estas intervenciones sobre el proceso entrenado y otros procesos inhibitorios e identificar las características asociadas a los resultados. En este estudio se propuso analizar la eficacia de un entrenamiento de la inhibición de la respuesta en niños en los primeros años de escolaridad primaria, sobre este proceso y la inhibición perceptual, a corto y largo plazo; y estudiar si variables como la edad y el nivel inhibitorio de base de los participantes se relacionan con los resultados. Participaron 93 niños (de 6 a 8 años), asignados a un grupo de entrenamiento y otro de control, en un diseño experimental con pre-test y dos post-test. Se observaron efectos, atribuibles al entrenamiento, sobre el desempeño de una tarea de inhibición de la respuesta a corto plazo, siendo los niños con un nivel inhibitorio de base más bajo quienes presentaron mayores beneficios. Se discute sobre el aporte de los resultados al modelo no-unitario de la inhibición, el alcance de las intervenciones y el estudio de las características de los participantes en relación con los efectos del entrenamiento.
Studi Tentang Faktor yang Mempengaruhi Niat untuk Mengundurkan Diri pada Operator Call Center
Authors:   School of Business and Economics Universitas Prasetiya Mulya JL. RA. Kartini (TB Simatupang), Cilandak Barat Jakarta Selatan, Jakarta 12430 Indonesia., Wijoyo Aditya , Laksmana Ari Yuda ,   School of Business and Economics Universitas Prasetiya Mulya JL. RA. Kartini (TB Simatupang), Cilandak Barat Jakarta Selatan, Jakarta 12430 Indonesia., Adiarto Banito ,   School of Business and Economics Universitas Prasetiya Mulya JL. RA. Kartini (TB Simatupang), Cilandak Barat Jakarta Selatan, Jakarta 12430 Indonesia., Arianty Desy ,   School of Business and Economics Universitas Prasetiya Mulya JL. RA. Kartini (TB Simatupang), Cilandak Barat Jakarta Selatan, Jakarta 12430 Indonesia., Hiong Ng Pwee ,   School of Business and Economics Universitas Prasetiya Mulya JL. RA. Kartini (TB Simatupang), Cilandak Barat Jakarta Selatan, Jakarta 12430 Indonesia., Maryono Heronimus ,   Prasetiya Mulya Publishing
Published: July 2021

Keinginan untuk keluar dari pekerjaan bagi operator call-center disebabkan banyak hal. Dengan menggunakan teori Job-Demands Resources model, penelitian ini menguji faktor tuntutan pekerjaan (disonansi emosi), sumber daya pekerjaan (kemandirian pekerjaan dan dukungan supervisor) serta keterlibatan pekerjaan untuk mencari besarnya pengaruh terhadap keinginan untuk keluar. Penelitian ini melibatkan 215 agen call-center di Indonesia. Hasil penelitian menyarankan untuk memperbaiki kepuasan pekerjaan sehingga dapat menurunkan keinginan untuk keluar. Disonansi emosi memberikan hubungan negatif dengan kepuasan pekerjaan dan hubungan positif dengan keinginan untuk berhenti kerja. Kemandirian pekerjaan tidak berkorelasi dengan kepuasan pekerjaan dan keinginan berhenti kerja, juga dukungan atasan tidak berhubungan secara langsung dengan keinginan berhenti kerja.
Pandemia y políticas sociosanitarias en América Latina
Authors: Nercesian Inés , Cassaglia Roberto , Morales Castro Vanessa
Published: July 2021

El artículo analiza las políticas sanitarias y socioeconómicas adoptadas durante la pandemia del SARS-CoV-2 en seis países de América Latina: Argentina, Brasil, Chile, Colombia, México y Perú. Proponemos como hipótesis que el comportamiento de la pandemia y las medidas socio­sanitarias adoptadas fueron el resultado de una combinación de factores de coyuntura y elementos estructurales. En cuanto a los factores coyunturales, consideramos el perfil del gobierno y las élites estatales; respecto a los estruc­turales, cuentan las capacidades estatales, las características sociodemográficas y los índices relacionados con el desarrollo humano. El artículo utiliza una estrategia de análisis comparativo a partir de una combinación de metodologías cuantitativas y cualitativas.
Cueto, M. (2020). El regreso de las epidemias. Salud y sociedad en el Perú del siglo XX. (2. da ed.). Lima. Instituto de Estudios Peruanos.
Authors: Malca Camila Gianella
Published: July 2021

Reseña del libro El regreso de las epidemias. Salud y sociedad en el Perú del siglo XX.
Cuando lo que parecía lejano está muy cerca: epidemias y cuidados en el devenir del pasado y del presente
Authors: Ramacciotti Karina
Published: July 2021

Introducción al número 89 de Apuntes: Tiempos de COVID-19 en América Latina: perspectivas desde las ciencias sociales
Metaphors and metaphorical language/s in religion, art and science
Authors: Fritsch-Oppermann Sybille C.
Published: July 2021

Languages play an essential role in communicating aesthetic, scientific and religious convictions, as well as laws, worldviews and truths. Additionally, metaphors are an essential part of many languages and artistic expressions. In this paper I will first examine the role metaphors play in religion and art. Is there a specific focus on symbolic and metaphoric language in religion and art? Where are the analogies to be found in artistic metaphors and religious ones? How are differences to be described? How do various (philosophical) concepts of aesthetics and theological concepts explain those different kinds of language and how, if at all, do they make use of them? Lastly: what could be added to aesthetics, philosophy and theology by examining carefully the role and importance of language, including nonverbal, sign language and especially metaphorical language? Without the human capacity for language, religions are scarcely imaginable. A widening of traditional exegesis and hermeneutics by taking into account nonverbal semantics is needed. Religion is a cognitive and linguistic phenomenon. By taking this seriously, we set and enable an agenda to discuss religion scientifically, leaving aside for the purpose of a scientific understanding and discourse about the inter-religious and the inner-religious claims of truth and absolutist claims. To sum it up: metaphor is introduced as an important means of language when it comes to religious conceptualization. Next, I will show that art, more than religion, deals with visual metaphor – the latter being an image that suggests a particular association, similarity or analogy between two (or more) generally unconnected visual elements. This often, but not always, functions in a roughly comparable fashion to the better-known concept of verbal metaphor. In addition, visual metaphor has developed many original and unique characteristics. These two sections are followed by another one dealing with (inter)cultural philosophy of religion and aesthetics, as well as the meaning of metaphors for these disciplines. The next section is on metaphor and metaphorical language in mathematics, natural sciences and art and how they are related, i.e. influence and help each other. I will discuss the critical approach to metaphors in natural science and provide a short introduction to the cultural history of mathematics and art. Mathematicians and artists have long been on the quest to understand the physical world they see before them and the abstract objects they know by thought alone. How have art and mathematics helped each other in representing each other’s concepts? A final section provides a summary and an outlook: theology is contextual as is science – and so is art. All these disciplines partly rely upon metaphor and by the help of metaphor get closer to an intercultural and interdisciplinary understanding. I shall argue that, by dealing more carefully with their metaphorical language and their own metaphors, together they become better equipped to map the world.
The design argument salvaged? Assessing the contemporary argument from improbability
Authors: Loikkanen Juuso
Published: July 2021

Some features within the physical universe appear to be so well-ordered that they have been regarded as evidence of the existence of a supernatural being who has designed them. This history of the so-called design argument is millennia-long, and various formulations of the argument have been presented. In this paper, I explore one contemporary version of the design argument proposed by the Intelligent Design movement, and analyze its advantages and disadvantages in comparison to one of the most famous classical versions of the argument.
French atheist spirituality
Authors: Skurzak Joanna
Published: July 2021

The phrase “atheist spirituality” may seem rather paradoxical at first. In practice, both atheists and theists object to it. Atheists would prefer to be called naturalists – in order to emphasize their connection with a specific tradition and interpretation of the world, and avoid being equated only with the denial of theism. They will be willing to deny the existence of any spiritual element, and thus deny the meaningfulness of religious language. It is worth stressing that this does not apply to all atheists. A new form of spirituality suggested by Francophone philosophers concerns first of all the resignation from a faith about a transcendent God, which is substituted with an undefined sacrum (what is holy, is highest) in immanence. New forms of spirituality are becoming a popular alternative to religious spirituality today. However, traditional and new spiritualities should not be treated as separate sets, as they do not necessarily compete with each other. Systems of spiritual development related to specific denominations will always provide inspiration even for atheist spirituality. The latter can indicate that apart from religion, there is also a spirituality that can develop in a person. Nihilism is not the only alternative to religion, as sometimes the defenders of the old religious order try to show. Atheist spirituality can sometimes refer to realities that are rich and enhancing.
Spleen Glucose Metabolism on [18F]-FDG PET/CT for Cancer Drug Discovery and Development cannot be Overlooked
Authors: Seban Romain-David , Synn Shwe , Muneer Izza , Champion Laurence , Schwartz Lawrence H. , Dercle Laurent
Published: July 2021

Background:

Fluorine-18-fluorodeoxyglucose ([18F]-FDG) Positron Emission Tomography/
Computed Tomography (PET/CT) is a useful tool that assesses glucose metabolism in tumor
cells to help guide the management of cancer patients. However, the clinical relevance of glucose
metabolism in healthy tissues, including hematopoietic tissues such as the spleen, has been potentially
overlooked. Recent studies suggested that spleen glucose metabolism could improve the management
of different cancers.

Study Eligibility Criteria:

Overall, the current literature includes 1,157 patients, with a wide range
of tumor types. The prognostic and/or predictive value of spleen metabolism has been demonstrated
in a broad spectrum of therapies, including surgery and systemic cancer therapies. Most of these
studies showed that high spleen glucose metabolism at baseline is associated with a poor outcome
while treatment-induce change in spleen glucose metabolism is a multi-faceted surrogate of cancer-
related inflammation, which correlates with immunosuppressive tumor microenvironment as
well as with immune activation.

Conclusion:

In this systematic review, we seek to unravel the prognostic/predictive significance of
spleen glucose metabolism on [18F]-FDG PET/CT and discuss how it could potentially guide cancer
patient management in the future.
Structural Aspects of mTOR Inhibitors: Search for Potential Compounds
Authors: Kaur Kamalpreet , Anant Arjun , Asati Vivek
Published: July 2021

:

mTOR (mammalian target of rapamycin) is a catalytic subunit composed of two multi-protein complexes
that indicate mTORC1 and mTORC2. It plays a crucial role in various fundamental cell processes like cell proliferation,
metabolism, survival, cell growth, etc. Various first line mTOR inhibitors such as Rapamycin, Temsirolimus,
Everolimus, Ridaforolimus, Umirolimus, and Zotarolimus have been used popularly. In contrast, several mTOR inhibitors
such as Gedatolisib (PF-05212384) are under phase 2 clinical trials studies for the treatment of triple-negative
breast cancer. The mTOR inhibitors bearing heterocyclic moieties such as quinazoline, thiophene, morpholine, imidazole,
pyrazine, furan, quinoline are under investigation against various cancer cell lines (U87MG, PC-3, MCF-7, A549,
MDA-231). In this review, we summarized updated research related to mTOR inhibitors and their structure-activity
relationship, which may help scientists develop potent inhibitors against cancer.
ANALISA DAMPAK KEBIJAKAN PENURUNAN TARIF PAJAK PENGHASILAN (PPh) FINAL UNTUK UMKM TERHADAP PENERIMAAN PAJAK NEGARA DI KOTA BATAM PROV. KEPRI
Authors: Elsye Vanomy Afrianti
Published: July 2021

This study aims to determine whether MSMEs in Batam have implemented PP No. 23 of 2018 according to the form of business or business profile the impact of this rate reduction of this rate reduction on tax revenue at KPP Pratama Batam Selatan. Data obtained from distributing questionnaires via Google form and interviews and direct data collection at KPP Pratama Batam Selatan. The sampling method of this research is purposive sampling technique.and uses descriptive quantitative by investigating the influence of the MSME business profile variable on State Revenue through taxpayer compliance. State revenue data comes from PPh 4 paragraph 2 specifically for MSMEs with PP. No. 46 of 2013 and PP No. 23 of 2018 over period of 4 years, namely 2016 to 2019. And using regression and path analysis. So that the results of this study indicate that the business profile is significant on taxpayer compliance, as well as the significant result between taxpayer compliance with state revenue, but business profile has no significant effect on State Revenue, the effect is direct, but the results differ if the effect of business profile on State Revenue through compliance. The result of taxpayers is significant.
Cell response analysis to synchrotron radiation X-ray microbeam cytoplasm limited irradiation
Authors: Suzuki Masao
Published: July 2021

The cells responsible for cancer start their journey much like any other in the body. However, they grow uncontrollably through the body as a result of the accumulation of certain mutations. If left unchecked, cancer will impact on a number of the human body's key processes, leading,
ultimately, to death. There are many challenges associated with treating this disease, but they generally stem from the difficulty in differentiating the disease from the host and the ability of even a few cells to survive, recover and return. The most common treatments generally combine surgery
with some type of chemotherapy or radiotherapy. Chemotherapy utilises chemicals that kill fast-growing cells and thereby disproportionally affect the rapidly multiplying cancer cells. Radiotherapy targets the tumour with radiation to cause damage and cell death. Both have their advantages
and disadvantages, and both are often not 100 per cent effective. To improve these treatments, it is necessary to understand more about their precise effects on cells and, particularly, what defences cells have against their effects. Senior Principal Researcher Dr Masao Suzuki of the National
Institutes for Quantum and Radiological Science and Technology (QST) is utilising the considerable radiological resources of QST to investigate the effects of different types of radiation on cells under different conditions.
Development of artificial blood vessels made of new materials, used for vascular access in renal dialysis
Authors: Jin Denan
Published: July 2021

It can take many years to find a matched kidney donor and, in some cases, a matched donor is never found. Dialysis machines and methods of accessing a patient's cardiovascular system mean patients can live well whilst waiting for a transplant. Patients must undergo one of two surgical
procedures before their first haemodialysis; receiving either an arteriovenous fistula or an arteriovenous graft, which join the artery to the vein and facilitate the transfer of blood from body to machine. If a graft is needed, an operation to insert a polytetrafluoroethylene (PTFE) based
device is required but complications can arise in the form of blockages. Denan Jin, Department of Innovative Medicine, Osaka Medical and Pharmaceutical University, Japan, has spent years conducting research on the issues related to PTFE device blockage. He worked with his mentor Professor
Mizuo Myazaki before his retirement and his colleague Professor Shinji Takai, and these collaborations led to understanding of the major causes of these blockages. Jin and his team are working to develop means to increase the longevity of PTFE grafts. The researchers have discovered two key
mechanisms through which the grafts become blocked, which has led to the identification of two possible routes for preventing blockages. These relate to fibroblasts and the researchers have also identified the enzyme chymase as a key intermediate in the process of fibroblast recruitment. Jin
and the team are proposing the use of an alternative to PTFE and the development of an effective chymase inhibitor to reduce the recruitment of fibroblasts to the graft site.
Keterampilan Manajerial Kepala Sekolah Dasar Inpres di Kecamatan Duampanua Kabupaten Pinrang
Authors: Nurfadillah Nurfadillah , Mappincara Andi , Wahed Andi
Published: July 2021

Penelitian ini mengkaji tentang peran manajerial kepala sekolah dalam peningkatan mutu di sekolah dasar (SD). Metode penelitian yang digunakan dalam penelitian ini adalah metode kualitatif. Sumber data penelitian ini yaitu kepala sekolah dan guru. Teknik pengumpulan data melalui wawancara, observasi, dan dokumentasi. Teknik analisis data menggunakan model Miles, Huberman, dan Saldana yang meliputi pengumpulan, kondensasi, penyajian, dan verifikasi data. Keabsahan data dicapai melalui trianggulasi sumber dan teknik. Hasil penelitian menunjukkan: 1) keterampilan konsep yaitu menyusun visi, misi, tujuan, dan sasaran sekolah, 2) keterampilan teknis yaitu perencanaan, pengaturan, koordinasi, pengawasan dan pengendalian, 3) kemampuan membangun hubungan yaitu motivasi yaitu dengan cara memberikan penghargaan bagi guru yang berprestasi dan menanamkan semangat kerja.
Relationship Between the Practices of Learning Organization and Teacher Leadership at Indigenous Primary Schools of Kuala Langat District, Selangor, Malaysia
Authors: Kullan Saraswathy , Mansor Mahaliza
Published: July 2021

The main focus of this study was to (1) identify the level of the practices of learning organization, (2) identify the level of teachers’ leadership, and (3) determine the relationship between practices of learning organization and teacher leadership. The theoretical framework of both Watkins and Marsick (1999) and Katzenmeyer and Moller (2009) were modified to form the conceptual framework of the study. The data were collected through questionnaires distributed to 72 teachers which were randomly selected from six Indigenous Primary Schools of Kuala Langat District, Selangor. The study was a quantitative research. The data collected was analyzed using descriptive and inferential statistics using the SPSS IBM Version 23.0 software. The results showed that the practices of learning organization by teachers recorded a high level of mean value at 3.87 and at 4.05 for teacher leadership. There was a moderate, positive and significant relationship between practices of learning organization and teacher leadership (r = 0.699, p<0.01). This finding promotes practices of learning organization in schools which may lead to positive changes in teacher leadership. The implication of the study is the practices of learning organization should be practised at individuals, teams and organization levels in schools to improve the leadership skills of teachers through learning continuously.
Pengaruh Kompetensi Pedagogik Guru terhadap Kualitas Pembelajaran Sekolah Menengah Atas di Kota Sekayu, Sumatera Selatan
Authors: Rosyada Amrina , Harapan Edi , Rohana Rohana
Published: July 2021

Penelitian ini bertujuan untuk mengetahui pengaruh kompetensi pedagogik guru terhadap kualitas pembelajaran. Metode penelitian yang digunakan pada kajian ini adalah survei dengan pendekatan kuantitatif. Populasi dalam penelitian ini adalah guru sekolah menengah atas negeri (SMAN) di Kota Sekayu, Provinsi Sumatera Selatan. Jumlah populasi yaitu 162 orang dengan sampel sebanyak 102 orang yang dipilih dengan menggunakan teknik random sampling. Data dikumpulkan menggunakan angket. Validasi instrumen dilakukan dengan uji validitas dan uji reliabilitas. Teknik analisis data dilakukan dengan analisis koefisien determinasi, uji signifikansi (uji t), dan persamaan regresi linier sederhana. Hasil penelitian ini menunjukkan bahwa kompetensi pedagogik guru berpengaruh signifikan terhadap kualitas pembelajaran dengan nilai koefisien sebesar 0,295. Hasil penelitian ini menyarankan penguatan kompetensi pedagogik guru sebagai bagian dari upaya peningkatan kualitas pembelajaran.
COVID-19 and tourism sector: A perspective of Saudi Arabia
Authors:   Department of Business Administration, College of Business, University of Jeddah, Jeddah, Saudi Arabia, Kernshi Abeer Shergawi , Waheed Rida ,   Finance and Economics Department, College of Business, University of Jeddah, Jeddah, Saudi Arabia
Published: July 2021

The current paper attempts to analyze the relationship between COVID-19 and tourism in Saudi Arabia from the period 2nd March 2020–15th Nov 2020 as COVID-19 cases started to increase in March 2020. Along with this, predicted data is also used for the year 2021 in order to know the situation of tourism in the coming year if COVID-19 cases continue to increase. Ordinary least square, as well as quantile regression, is used to have a detailed overview of the nexus between COVID-19 and tourism. The findings of the study clearly indicate that tourism in Saudi Arabia is declined significantly due to COVID-19 in 2020. Besides this, it is also found that if COVID-19 cases continue to increase in 2021, then tourism will continue to decrease in the coming year as well.