bluuebunny/crossref_metadata_2025_split huggingface dataset:
Incidence and risk of venous thromboembolism according to primary treatment in women with ovarian cancer: A retrospective cohort study
Authors: Yuk Jin-Sung , Lee Banghyun , Kim Kidong , Kim Myoung Hwan , Seo Yong-Soo , Hwang Sung Ook , Yoon Sang-Hee , Kim Yong Beom 
Published: April 2021

Objective
This study aimed to investigate incidence and risk for venous thromboembolism (VTE) according to primary treatment in women with ovarian cancer.

Methods
We selected 26,863 women newly diagnosed with ovarian cancer between 2009 and 2018 from the Korean Health Insurance Review and Assessment Service databases. During the total follow-up period and the first six months after initiation of primary treatments, incidence and risk of VTE were evaluated according to primary treatment as no treatment, surgery, radiotherapy, or chemotherapy.

Results
The mean follow-up period was 1285.5±6 days. The VTE incidence was highest in women who underwent chemotherapy (306 per 10,000 women). Among women who underwent surgery, VTE was highest in surgery with neoadjuvant chemotherapy (536 per 10,000 women), followed by surgery with adjuvant chemotherapy (360 per 10,000 women) and surgery alone (132 per 10,000 women). During the first 12 months, monthly incidence of VTE decreased. Compared with women with no treatment, risk of VTE significantly increased in women undergoing chemotherapy (HR 1.297; 95% CI, 1.08–1.557; P = 0.005) during the total follow-up period and decreased in women undergoing surgery (HR 0.557; 95% CI, 0.401–0.775; P<0.001) and radiotherapy (HR 0.289; 95% CI, 0.119–0.701; P = 0.006) during the first six months. Among women who underwent surgery, VTE risk significantly increased in surgery with neoadjuvant chemotherapy (HR 4.848; 95% CI, 1.86–12.632; P = 0.001) followed by surgery with adjuvant chemotherapy (HR 2.807; 95% CI, 1.757–4.485; P<0.001) compared with surgery alone during the total follow-up period and in surgery with neoadjuvant chemotherapy (HR 4.223; 95% CI, 1.37–13.022; P = 0.012) during the first six months.

Conclusions
In this large Korean cohort study, incidence and risk of VTE were highest in women with ovarian cancer who underwent chemotherapy and surgery with neoadjuvant chemotherapy as a primary cancer treatment. Incidence of VTE decreased over time.
Makanan dan Kebiasaan Makan Siput Gonggong (Laevistrombus turturella) di Perairan Pulau Penyengat Kota Tanjungpinang
Authors: Nezaputri Nur Afni , Kurniawan Dedy , Suryanti Ani , Muzahar Muzahar , Susiana Susiana 
Published: April 2021

<strong>Food and Feeding Habits of Dog Conch (<em>Laevistrombus turturella</em>) on Penyengat Island, Tanjungpinang</strong>. Dog conch (Laevistrombus turturella) in Tanjungpinang, including commodities of high economic value. The purpose of this study was determine the ratio of the length of gut and the total body length, type of food and feeding habits of dog conch on the Penyengat Island, Tanjungpinang, Riau Islands. The study was conducted from May to November 2019. The sampling location was determined based on the purposive sampling method. The station were divided into 3 stations based on 1) the catch zone of the dog conch, 2) the characteristics of the dog conch habitat and 3) activities along the coast. Analysis of the data were provided the ratio of the length of gut and the total body length, index of preponderance, Viscero Somatic Index (VSI), total organic matter and index of electivity. The results showed that the ratio of the length of gut and the total body length of the dog conch were 1,53; 1,60; 1,66 and classified as an omnivore based on the ratio of the length of gut and the total body length. Types of dog conch food that have been found were detritus and microalgae class <em>Bacillariophyceae, Chlorophyceae,</em> and <em>Crustaceans</em>. The feeding habits of dog conch were detritus with the index of preponderance of 65-70% as the main food. VSI values were ranged from 24,27 to 36,35%. Value Index of electivity were ranged from 0,99-1% or close to 1.
Efektivitas Pengelolaan Taman Wisata Alam (TWA) Seblat di Provinsi Bengkulu dan Sejarah Status Fungsi Kawasannya
Authors: Senoaji Gunggung , Anwar Guswarni , Suharto Edi 
Published: April 2021

Taman Wisata Alam (TWA) Seblat di Provinsi Bengkulu, Indonesia, dengan luas 7.732,80 ha, merupakan kawasan hutan konservasi yang tujuan utamanya dimanfaatkan untuk kepentingan pariwisata alam dan rekreasi. Ekosistem hutan tropis dataran rendah dengan keanekaragaman hayati didalamnya dan adanya pusat latihan gajah (PLG) merupakan obyek daya tarik wisata kawasan TWA ini. Sebelum ditunjuk sebagai TWA kawasan ini merupakan hutan produksi. Adaya habitat gajah dan satwa liar lainnya di dalamnya menjadikan alasan kawasan ini berubah fungsi menjadi hutan konservasi TWA. Pengelola hutan konservasi TWA Seblat adalah Balai Kosevasi Sumberdaya Alam Bengkulu. Penelitian ini bertujuan untuk mengetahui kondisi penggunaan lahan saat ini, sejarah status fungsi hutannya dan tingkat efektivitas pengelolaan TWA Seblat. Kondisi penggunaan lahan ditentukan dengan metode pemetaan dan survey lapangan. Pendekatan sejarah digunakan untuk mengetahui dinamika perubahan status fungsi kawasan hutannya, sedangkan efektivitas pengelolaan ditentukan dengan metode METT (Management Effektiviness Tracking Tools). Hasil penelitian menunjukkan bahwa penggunaan lahan di kawasan Taman Wisata Alam Seblat yang berupa hutan luasnya sekitar 5.015 ha (64,9%), semak belukar sekitar 2.142 ha (27,7%), pertanian lahan kering campur sekitar 381 ha (4,9%), perkebunan sekitar 59,1 ha (0,8%), tanah kosong sekitar 109 ha (1,4%) dan sawah sekitar 6 ha (0,1%). Sebelum tahun 1995. status fungsi kawasan hutan TWA Seblat ini adalah hutan produksi, pada tahun 1995 berubah menjadi hutan produksi tujuan khusus Pusat Latihan Gajah (PLG), dan sejak tahun 2011 berubah menjadi hutan konservasi TWA. Tingkat effektivitas pengelolaan TWA Seblat termasuk dalam kategori efektif, dengan nilai 71%. Untuk mengoptimalkan fungsi wisata alam dan rekreasi diperlukan penambahan fasilitas dasar, fasilitas wisata, dan rencana pengelolaan jangka pendek.
The Decline of Substance over Form in Accounting
Authors: Fischer Dov , Ellman Ortal , Schochet Sholom 
Published: April 2021

Abstract
“Substance over form” is a traditional accounting maxim that has also influenced legal thinking and has its roots in classical philosophy. “Substance over form” states that accountants do not record transactions based on the outward form of the transaction but discern its economic substance and report accordingly. Nevertheless, “substance over form” has been deemphasized by the FASB’s conceptual framework in recent decades, to the point that an internal debate now rages over whether accountants and auditors have a right and responsibility to put substance over form. FASB must therefore make its position clear on where it stands in this debate.
Synthesis, properties, and activity of MoVTeNbO catalysts modified by zirconia-pillared clays in oxidative dehydrogenation of ethane
Authors: Shorayeva Kamshat Abithanovna , Massalimova Bakytgul Kabykenovna , Bespalko Yulia Nikolaevna , Kovalev Evgenii Pavlovich , Ishchenko Arcady Vladimirovich , Sadykov Vladislav Aleksandrovich 
Published: April 2021

Abstract
Composites comprising MoVTeNbO mixed oxide and zirconia-pillared montmorillonite clays (PilCs) were prepared. XRD and TEM with EDX studies confirmed the preservation of M1 MoVTeNbO phase in these composites responsible for high activity and selectivity in ethane oxidative dehydrogenation into ethylene. For composites with PilC content of 10 wt%, the best ethylene yield exceeding that of bulk MoVTeNbO oxide was demonstrated for clays with zirconia pillars doped with Ce and Al possessing the highest specific surface area. This is explained by optimized chemical interaction of these clays with MoVTeNbO mixed oxide improving its bulk oxygen mobility and reactivity by structure disordering while blocking surface sites responsible for combustion due to the stabilization of the reactive terminal oxygen species.
Oxidation Behavior at 1173 K of Modified P/M Stainless Steel 316 L by Addition of Cr, Ni, and Cr with Ni
Authors: Polsen Yada , Wangyao Panyawat , Chuankrerkkul Nutthita , Visuttipitukul Patama , Tongsri Ruangdaj , Lothongkum Gobboon 
Published: April 2021

Abstract
Specimens of P/M 316 L stainless steel and modified P/M 316 L stainless steel with various amounts of Cr, Ni, and Cr along with Ni additions were compressed by a 500 MPa-hydraulic press for a duration of 30 s and then sintered at 1573 K in a hydrogen atmosphere for 2.7 ks. The oxidation resistance tests of those specimens were carried out at 1173 K in air for 360 ks. The 5 wt.-% Cr-added specimen resulted in the best oxidation resistance with the lowest oxidation rate constant of 1.54 × 10-7 kg2 × m-4 × s-1. The oxidation products which formed inside the pores and on the surfaces of all specimens were analyzed using scanning electron microscope/energy dispersive spectroscopic (SEM/EDS) and X-ray diffraction (XRD) analysis techniques. The results show that the oxides forming on both inside pores and surfaces were identified as Cr2O3, Fe2O3, (Fe0.6Cr0.4)2O3, NiFe2O4 and NiCr2O4 in all tested conditions. The measured hardness of the modified specimens was in the range of 87-92 HRB, compared to the hardness of the 316 L specimen, which was 93 HRB. Increasing the amount of powder added provided a slightly lower hardness value due to increased porosity.
Effect of graphene nanoplatelet filling on mechanical properties of natural fiber reinforced polymer composites
Authors: Erdoğdu Yusuf Eren , Korkmaz Engin Eren , Temiz Şemsettin 
Published: April 2021

Abstract
In this study, the mechanical properties of plain woven jute-epoxy composite materials were investigated after filling graphene nanoplatelets (GNPs) in different proportions. The time dependent changes in the viscosity and temperature of unfilled epoxy resin, with 0.5, 1 and 2 wt.-% graphene nanoplatelets filled epoxy resins were observed. Woven jute reinforced unfilled, 0.5 wt.-% GNPs filled and 1 wt.-% GNPs filled epoxy composite plates were produced by using vacuum assisted resin transfer molding (VARTM) at the same waiting and processing times. Specimens were prepared and subjected to tensile and flexural tests according to ASTM D 3039 and ASTM D 790 standards, respectively. Images were taken and evaluated with a scanning electron microscope (SEM) in areas where tensile damage occurred. It was observed that the gap amount between the fiber and the matrix increased and the interface adhesion decreased as the fill amount increased in the composites produced. The testing results indicated that the tensile and flexural properties of composites decreased at 0.5 wt.-% and 1 wt.-% during the GNPs loading as compared to unfilled composites.
Fatigue life evaluation of an electrically driven shuttle frame using finite element analysis
Authors: Sener Arif Senol 
Published: April 2021

Abstract
This article provides the fatigue life estimation of the frame of a new electrically powered shuttle used in airports and resorts. The frame and components of the electrically powered shuttle were designed by expert employers of the OSCAR Co. using a CATIA computer program. Accelerometers were mounted under and above the prototype electric vehicle frame and external load path interaction data were collected by road tests. By means of five varied degrees of road roughness and three different conditions for vehicle loading, the raw road data were recorded via accelerometers on the vehicle frame. The recorded raw data was made available by processing with the FDesign program. After the external load was determined, a 3D drawing of the frame of the vehicle was transferred to the ANSYS program as a step file. In the chassis model transferred to the ANSYS program; material assignment, meshing of the frame structure, defining the boundary conditions of the structure and static analysis were determined according to the most critical road load, following which fatigue analyses were performed for five different roads. The fatigue life and damage amount of each road on the vehicle frame were calculated separately by considering Miner’s rule according to the S-N high cycle method. Experiments showed that no fatigue damage occurred within the predicted 200,000 km.
Thermo-mechanical analysis of a FGM plate subjected to thermal shock – A new numerical approach considering real time temperature dependent material properties
Authors: Kaman Mete Onur , Celik Nevin , Das Resul 
Published: April 2021

Abstract
In present the study, sudden cooling, in other words thermal shock, is applied to a plate that is originally a functionally graded material (FGM). The flat plate is assumed to have an edge crack on it. Hence a numerical couple-field analysis is performed on the plate. The FGM is a combination of Ni and Al2O3. The thermal and mechanical properties of the FGM are assumed to depend on temperature variation. The mixing percentages of the Ni and Al2O3 throughout the plate are considered to vary (i) linearly, (ii) quadratically and (iii) in half-order. In order to solve the problem, a new subroutine depending on temperature is written using APDL (ANSYS Parametric Design Language) codes. Three values of the heat transfer coefficient are applied to the initially heated plate. As a result, the transient temperature variation and stress intensity factor are presented to show the thermo-mechanical relation of the plate. The material properties changing with temperature results in more reliable temperature values. Increasing the heat transfer coefficient results in better cooling and in a lesser amount of time to reach ambient air temperature.
Comparision of the political optimization algorithm, the Archimedes optimization algorithm and the Levy flight algorithm for design optimization in industry
Authors: Yıldız Betül Sultan , Pholdee Nantiwat , Bureerat Sujin , Erdaş Mehmet Umut , Yıldız Ali Rıza , Sait Sadiq M. 
Published: April 2021

Abstract
This article focuses on minimizing product costs by using the newly developed political optimization algorithm (POA), the Archimedes ‘optimization algorithm(AOA), and the Levy flight algorithm(LFA) in product development processes. Three structural optimization methods, size optimization, shape optimization, and topology optimization, are extensively applied to create inexpensive structures and render designs efficient. Using size, shape, and topology optimization in an integrated way, It is possible to obtain the most efficient structures in industry. The political optimization algorithm (POA) is a metaheuristic algorithm that can be used to solve many optimization problems. This study investigates the search capability and computational efficiency of POA for optimizing vehicle structures. By examining the results obtained, we prove the apparent superiority of the POA to other recent famous metaheuristics such as the Archimedes optimization algorithm and the Levy flight algorithm. The most important result of this paperwill be to provide an impressive aid for industrial companies to fill the gaps in their product design stages.
Optimization of flexural and impact properties of r-LDPE-DPWF composite for printer parts production
Authors: Government Rabboni Mike , Okeke Edozie Thompson , Thaddaeus Julius , Onukwuli Okechukwu Dominic 
Published: April 2021

Abstract
The circulation of recycled low density polyethylene (r-LDPE) globally, using Nigeria as point of reference is emphasized in this work. The need for combining r-LDPE with a less expensive organic fiber as an economical alternative material in panel production for printer component to reduce waste through recycling. In this study, the particle size (PS) and fiber content (FC) of date palm wood fiber (DPWF) in a r-LDPE matrix are essential factors to be considered for optimizing flexural strength (FS), flexural modulus (FM) and Izod impact strength (IIS) of r-LDPE-DPWF (recycled low density polyethylene-date palm wood fiber) composite for producing printer components. The variant FC and PS of the DPWF was compounded in r-LDPE matrix to optimize the FS, FM and IIS of r-LDPE-DPWF composite, using a central composite design (CCD) as a response surface methodology (RSM). The DPWF and r-LDPE-DPWF composite were analyzed by Fourier transformed infrared (FTIR). The results indicated that the FS, FM and IIS of r-LDPE-DPWF composite measured 46.66002 MPa, 1.150043 GPa and 1.99899 KJ × m-1 at optimal operation, respectively. Under these operating conditions, PS and FC were 60.78 mesh (250 μm) and 30 wt.-%, respectively. Finally, the main coefficient of determination (R2) for the factors correlated with the characteristics of the r-LDPE-DPWF composite at an approximate value of 1 with a differential error of RSM and experiment values < 0.05 %. It was concluded that the RSM model yielded the necessary parameters for the r-LDPE-DPWF composite to be considered as a potential material for printer components.
Evaluation methods for estimation of Weibull parameters used in Monte Carlo simulations for safety analysis of pressure vessels
Authors: Wang Bin , Islam Faisal , Mair Georg W. 
Published: April 2021

Abstract
The test data for static burst strength and load cycle fatigue strength of pressure vessels can often be well described by Gaussian normal or Weibull distribution functions. There are various approaches which can be used to determine the parameters of the Weibull distribution function; however, the performance of these methods is uncertain. In this study, six methods are evaluated by using the criterion of OSL (observed significance level) from Anderson-Darling (AD) goodness of Fit (GoF), These are: a) the norm-log based method, b) least squares regression, c) weighted least squares regression, d) a linear approach based on good linear unbiased estimators, e) maximum likelihood estimation and f) method of moments estimation. In addition, various approaches of ranking function are considered. The results show that there are no outperforming methods which can be identified clearly, primarily due to the limitation of the small sample size of the test data used for Weibull analysis. This randomness resulting from the sampling is further investigated by using Monte Carlo simulations, concluding that the sample size of the experimental data is more crucial than the exact method used to derive Weibull parameters. Finally, a recommendation is made to consider the uncertainties of the limitations due to the small size for pressure vessel testing and also for general material testing.
Experimental Study on the Stress-Strain Behavior of Self-Compacting Concrete Modified by Waste Rubber under Uniaxial Tension with Acoustic Emission Technique
Authors: Liu Zhiheng , Chen Xudong , Chen Bo , Cheng Xiyuan 
Published: April 2021

Abstract
Tensile characteristics of concrete play an important role in structures. In this paper, the stress-strain behavior of self-compacting concrete modified by waste tire rubber (rubberized self-compacting concrete [RSCC]) under uniaxial tension is researched. Both monotonic and cyclic tests are conducted for RSCC with different rubber contents. The results demonstrate that the incorporation of rubber aggregate results in a lower uniaxial tensile strength but an improved deformation resistance, a high energy-dissipating ability, and a lower stiffness deteriorating rate. The acoustic emission (AE) technique is employed to detect the damage progression. Although the AE signals decrease with the increase of AE signals, the damage can be well represented by a relatively high emitting rate of AE signals. Furthermore, the load ratio, calm ratio, and relaxation ratio are used to characterize the damage development. It is found that the incorporation of rubber aggregate results in a complicated cracking behavior of specimen under uniaxial tension.
Kök Kanal Şekillendirilmesinde Kullanılan Farklı Döner Eğe Sistemlerinin Apikalden Taşan Debris Miktarına Etkisinin Karşılaştırılması
Authors: ERKAN Seda , KAYA Sadullah , FALAKALOĞLU Seda 
Published: April 2021

Amaç: Bu
in vitro çalışmanın amacı; Reciproc
Blue, Protaper Next ve Protaper Universal döner eğe sistemlerini kullanarak,
apikalden taşan debris miktarının karşılaştırılmasıdır.

Gereç ve Yöntemler: Çalışmamızda
60 adet alt premolar diş; Reciproc Blue (R40; VDW, Munich, Germany), Protaper
Next (X4; Dentsply Maillefer, Ballaigues, Switzerland) ve Protaper Universal
(F4; Dentsply Maillefer, Ballaigues, Switzerland) döner nikel-titanyum (Ni-Ti)
eğe sistemleri ile şekillendirilmek üzere üç ayrı deney grubuna ayrıldı (n=20). Şekillendirme işlemlerinde ve final
irrigasyonunda şırınga pompası kullanılarak toplam 10 ml distile su ile
irrigasyon yapıldı. Bürklein ve
arkadaşlarının kullandığı düzenek oluşturularak apikalden taşan debris, ağırlıkları
önceden elektronik tartıyla belirlenen eppendorf tüpleri içerisinde
biriktirildi. Sonrasında net debris ölçümü için eppendorf tüpleri 70°C ve 5 gün
boyunca etüvde bekletildi. Apikalden taşan debris miktarı, debris içeren
eppendorf tüplerin ağırlığından boş eppendorf tüplerin ağırlığı çıkarılarak hesaplandı.

Bulgular:
Gruplar arasındaki farklılıklar incelenirken, ikili
gruplarda Mann Whitney U, ikiden fazla gruplarda Kruskal Wallis-H testlerinden
yararlanıldı. Kruskal Wallis-H testinde anlamlı farklılıkların görülmesi
durumunda Post-Hoc çoklu karşılaştırma testi ile aralarında farklılık olan
gruplar belirlendi. Sonuçlar p&lt;0,05 düzeyinde anlamlı kabul edildi. Taşan
debris ağırlıkları bakımından gruplar arasında istatistiksel olarak anlamlı
farklılık bulundu (p=0,025). Şekillendirme
sistemlerine göre taşan debris miktarı bakımından gruplar arası
ikili karşılaştırma sonuçlarına göre; Protaper Universal’ın diğer sistemler ile
aralarında istatistiksel olarak anlamlı farklılık bulunmamıştır. Protaper Next
ile Reciproc Blue grupları arasındaki karşılaştırmada Protaper Next, Reciproc
Blue’ye göre anlamlı derecede daha az debris taşırdığı görülmüştür (p=0,007).

Sonuç: Bu
in vitro çalışmada kullanılan tüm
döner eğe sistemlerinin apikalden debris taşkınlığına neden olduğu tespit
edilmiştir.

Anahtar Kelimeler: Apikal Ekstrüzyon, Debris, Reciproc Blue,
Protaper Next, Protaper Universal