bluuebunny/crossref_metadata_2025 huggingface dataset:
Field Application of a Novel Multiresolution Multiwell Unconventional Reservoir Simulation: History Matching and Parameter Identification
Authors: Fu Jia , Chen Hongquan , Yao Changqing , Sakaida Shohei , Kerr Erich , Johnson Andrew , Datta-Gupta Akhil , Zhu Ding , Hill A. Daniel
Published: February 2024

This study focuses on developing an efficient workflow by integrating a multiresolution simulation model and a multiobjective evolutionary algorithm (MOEA) for application to multiwell unconventional reservoirs. In this approach, hydraulic fractures are represented using a dual porosity, dual permeability system facilitated by an embedded discrete fracture model (EDFM). A novel fast-marching simulation method is used to cut down on computational expenses by an order of magnitude, greatly accelerating the history-matching process. A variety of integrated monitoring technologies were implemented to map out the hydraulic fracture network. Insights into hydraulic fracture locations were gleaned from warm-back analysis of distributed temperature sensing data, and these locations were then assimilated into the simulation model as embedded discrete fractures. For the simulation, a fast-marching-based multiresolution model was used to partition the reservoir into local and shared domains guided by the diffusive-time-of-flight (DTOF) principle. The local domain maintained the original 3D grids near the wells while transforming the remaining area into 1D grids to accelerate the simulation process. Before history matching, a thorough sensitivity analysis was conducted to pinpoint the most impactful parameters. Subsequently, the model was fine-tuned using production data through an MOEA. The most sensitive parameters in history matching were identified as fracture geometry and conductivity, fluid saturations, and rock compressibility in the stimulated reservoir volume (SRV) areas. After history matching, there was a noteworthy reduction in the uncertainty of these tuning parameters. The calibrated parameters are valuable to evaluate the effectiveness of the well completion design. Overall, this work emphasizes the innovative combination of techniques applied, the efficiency gains in the history-matching process, and the scalability of the approach to other oilfield applications.
Injection Temperature Impacts on Reservoir Response during CO2 Storage
Authors: Samaroo Mahendra , McClure Mark , Fowler Garrett , Chalaturnyk Rick , Dusseault Maurice B. , Hawkes Christopher
Published: February 2024

Sustained injection of industrial-scale volumes of cold CO2 into warmer subsurface rock will result in extensive cooling which can alter rock mass mechanical behavior and fluid migration characteristics. Advanced simulation tools are available to assess and characterize such phenomena; however, the effective use of these tools requires appropriate injection temperatures and rock thermophysical parameters (in addition to geomechanical and hydraulic properties). The primary objective of this study was to demonstrate the sensitivity of injection-induced tensile fracturing and fault reactivation to injection temperature and reservoir thermophysical properties during CO2 injection operations. This was achieved by (1) compiling and reviewing thermophysical parameter data available for formations in the province of Alberta, Canada, and CO2 injection temperature records for CO2 injection projects in western Canada and (2) using a 3D, physics-based, fully integrated hydraulic fracturing and reservoir simulation numerical model to examine the geomechanical response of several potential CO2 reservoirs in the Alberta Basin as a function of injection temperature, thermal conductivity (TC), and coefficient of linear thermal expansion (CLTE) values. The simulation results indicate that reducing the fluid injection temperature from 15°C (assumed in previous work) to 2°C (conservative value selected based on temperature data reviewed in this work) could trigger extensive vertical (20–130 m high, 100–600 m long) tensile fractures with rapid fracture initiation and full vertical growth within short periods (weeks to months) and continued horizontal length increase. When low values for thermophysical properties are used, the results show that thermally-induced tensile fracturing is unlikely, whereas the use of high values results in extensive tensile fracturing in all simulations. A similar conclusion was reached for the thermally-induced reactivation (unclamping) of proximal, critically-stressed faults. Notably, slip is predicted for all simulations where high thermophysical property values are used. This confirms that accurate determination of minimum fluid injection temperature and thermophysical parameters is important for containment risk assessment for commercial-scale CO2 storage projects. Another significant outcome of this work is the observation that most thermophysical parameters in the available data were measured using experimental conditions and/or temperature paths that are not representative of CO2 injection projects. As such, the development and validation of best practice approaches for accurate assessment of these parameters seem necessary.
Measurement of Casing Buckling in Producing Intervals
Authors: Suman G. O. , Klementich E. F. , Broussard L. P.
Published: February 2024

Extensive casing damage has been encountered within many of the production intervals of wells in the South Pass Blocks 24 and 27 fields located in the delta of the Mississippi River. As part of a program to ascertain damage configuration, a gyroscopic tool was designed to obtain accurate measurements of lateral casing deflection over relatively short intervals. Use of this tool, referred to as a Kinkmeter, has revealed that the principal mode of damage previously thought to have been collapse or shear, has been buckling in the producing interval. Since similar environments exist elsewhere, particularly in the Gulf Coast region, casing buckling in production intervals is probably widespread. In addition, offsets have been measured with the Kinkmeter adjacent to faults.

This report presents information on the design and field use of the Kinkmeter as well as the results of Kinkmeter surveys in a test well containing pipe bent to predetermined deflections. A program for computing the severity of bending and the magnitude of lateral deflection is presented. Photographs of scale models prepared from measurements of casing deflection obtained with the Kinkmeter are included.
The role of optimism bias in susceptibility to phishing attacks in a financial services organisation
Authors:   , Owen Morné
Published: February 2024

Researchers looking for ways to change the insecure behaviour that results in successful phishing have considered multiple possible reasons for such behaviour. Therefore, the purpose of this study is to understand the role of optimism bias (OB – defined as a cognitive bias), which characterises overly optimistic or unrealistic individuals, in order to ensure secure behaviour. Research is considered that has focused on issues such as personality traits, trust, attitude and information security awareness training (ISAT). We used a mixed methods design to investigate OB behaviour, building on a recontextualised version of the theory of planned behaviour to evaluate the influence that OB has on phishing susceptibility. To model the data, an analysis was performed on 226 survey responses (systematic random sampling method) from the employees of a financial services organisation using partial least squares (PLS) path modelling. To evaluate OB behaviour, we conducted an experiment consisting of three ISAT sessions and three simulated phishing attacks. After each phishing experiment, we conducted interviews to gain a better understanding of why people succumbed to the attacks. It was subsequently found that overly optimistic individuals are inclined to behave insecurely, while factors such as attitude and trust significantly influence the intention to behave securely. Our contribution to practice is to enhance the effectiveness of ISAT by identifying and addressing the OB weakness to deliver a more successful training outcome. Our contribution to theory enriches the Information Systems literature by evaluating the effect of a cognitive bias on phishing susceptibility and, through research, offering a contextual explanation of the resultant behaviour.
Sector orifice with a correlation-based analysis
Authors: Panda Santosh Kumar
Published: February 2024

In single and multiphase flows, an orifice is a vital flow-measuring and flow-controlling device that operates on Bernoulli’s theorem on the determination of the pressure drop (∆p). Laboratory, petroleum, energy, nuclear, mining, chemical, processing, and food industries all depend on flow monitoring and flow regulations. A sector or segmental orifice meter is a much simpler device used for drainage and sediment-laden type non-homogeneous flow. Sector orifice meter analysis is the rate of flow, pressure and velocity profile concerning input parameters to find out the ∆p and coefficient of discharge (Cd) of an orifice meter. The present study varies with different sector angles (θ), Reynolds number (Re) and space ratio (s/d) of the sector orifice for the flow analysis with the use of CFD (Ansys. Inc) based study. The numerical simulation range considered for θ (30°-180°), Re (10000-100000), and s/d (0.1-0.9). To compute the flow rate, ∆p and Cd by using air as a working fluid to present a flow problem through high viscous flow. The simulation also presents the pressure and velocity profiles along the flow on the variant of Re, θ and s/d. Based on the numerical data a correlation developed which will help the measurement through sector orifice for wide range of future application. With the comparison of the existing literature, this will give a good contribution to sector orifice for accurate flow measurement for high viscous flow.
Adsorbent Olarak Grafen Oksit Kullanılarak Metal Kaplama Atıksuyunda Nikel (II) Giderimi
Authors: KILIÇ Funda Cemre , AKDEMİR Andaç
Published: February 2024

Grafen oksit kullanılarak atıksulardan nikelin gideriminin amaçlandığı bu çalışmada, metal kaplama endüstrisi atıksuyundaki 18.08 – 183.95 mg/L Ni(II) konsantrasyon aralığı için bir dizi adsorpsiyon çalışması gerçekleştirilmiştir. 200 rpm sabit karıştırma devri altında optimum pH=6 ve optimum temas süresi 90 dakika olarak bulunmuştur. Adsorpsiyonda kinetik olarak; yalancı 2. derece kinetik izoterm olarak Temkin izotermi uygun model olarak seçilmiştir. Adsorbent olarak optimum grafen oksit miktarı 0.016 mg/L ve buna bağlı olarak maksimum adsorplama kapasitesi 112.56 mg/g belirlenmiştir. Literatür karşılaştırmaları da dikkate alınarak; grafen oksitin geliştirilebilir bir adsorbent olarak kullanılabileceği, bununla birlikte tek başına yüksek verim elde edilemeyeceği ancak fonksiyonelleştirilmesi halinde grafen oksit ile yüksek verim sağlanabileceği sonucuna varılmıştır.
Eber Gölü Prokaryotik Çeşitliliğinin Metagenomik Çalışmasıyla Karakterizasyonu
Authors: PAT Fahri , FİDAN PEDÜK Sultan , AKÇAY Neşe , KIZIL PAT Hatice Kübra , ARICAN Ercan
Published: February 2024

Eber Gölü, Türkiye'de göçmen kuşların geçiş rotası üzerinde yer almakta ve sazlık alanları sayesinde birçok kuş türüne doğal üreme ve yaşam alanı sağlamaktadır. Ülkemizde bu kadar önemli bir göl olmasına rağmen prokaryotik çeşitlilik konusunda yeterli çalışma olmadığı görülmüştür. Metagenomik analiz DNA izolasyonu ile elde edilen mikroorganizmaların türlerini, genetik yapılarını, fonksiyonel rollerini ve insan ile ekolojik sağlık üzerindeki etkilerini belirlemeyi mümkün kılmaktadır. Yeni nesil dizileme (YND), birçok DNA veya RNA örneğinin eşzamanlı olarak yüksek hızda ve yüksek hassasiyetle dizilenmesini mümkün kılan, modern bir DNA/RNA dizileme teknolojisidir. Bu çalışmamızda Eber Gölü'ne ait 16S ribozomal DNA (rDNA) (V3-V4 bölgeleri) dizilerinin metagenomik analizi için yüksek verimli YND yöntemleri kullanılmıştır. Prokaryotik çeşitliliği incelemek amacıyla MOTHUR yazılımı kullanılarak Illumina NovaSeq teknolojisi ile elde edilen dizi verileri analiz edilmiştir. Analizler sonucu Proteobacteria, Verrucomicrobia, Bacteroidetes ve Actinobacteria Şubelerinin baskın olduğu ortaya çıkarılarak Eber Gölü'ndeki prokaryotik çeşitlilik detaylı bir şekilde karakterize edilmiştir.
Bir Mekanik Jiroskopun Tasarımı, Modellenmesi ve Serbest Titreşim Analizi
Authors: KACAR İlyas
Published: February 2024

Jiroskoplar yön tayini için kullanılan cihazlar olmakla birlikte mekanik jiroskoplar; jiroskopik tork elde ederek yönlendirme ve dengeleme amaçlı kullanılmaktadır. Dönen cisimlere, dönme eksenleri haricindeki eksenlerden birine verilen yalpalama hızı sayesinde bir tork oluşmaktadır. Bu çalışmada oluşturulan tek volanlı bir mekanik jiroskop tasarımına, dinamik analiz uygulanması ile jiroskopik torkun hesaplanması sağlanmıştır. Bu analiz kapsamında yapılan modal analiz ile serbest titreşim frekansları belirlenmiştir. Volan dikey yerleştirilmiş olup ağırlık torku sayesinde çalışan, bir volanlı mekanik jiroskopun hareketine ilişkin dinamik cevaplar, klasik (Newtonian) mekaniği esaslı incelenmiştir. Volan 0-250 rad/s aralığında döndürüldüğünde herhangi bir doğal frekans oluşmamıştır. Jiroskop 0.468 Nm değerindeki tork ve 0.922 rad/s değerindeki yalpalama hızı ile dengelenmiştir. Jiroskopun zemine bağlandığı yatağa burulma sönümü verildiğinde nütasyon salınımları ortadan kalkmıştır. Sönümlü halde serbest titreşim frekansları değişmiştir.
Proliferative Effect of Gum Tragacanth on Different Cancer Cells
Authors: İRTEGÜN KANDEMİR Sevgi , JAHAN Israt , TEKE Fatma
Published: February 2024

Gum tragacanth (GT) is a natural plant exudate discharged from the twigs and stems of Asiatic species of the Astragalus genus. GT is a heterogeneous polysaccharide which has been utilized in various biomedical fields and traditionally in ethnomedicine because of its distinctive physicochemical and biological properties, such as great biocompatibility, thermal stability biodegradability, hydrophilicity and antioxidant activity. The aim of this study was to examine whether GT has cytotoxic effects on various cancer cell lines. For this aim, four cancer cell lines i.e., human colorectal adenocarcinoma (CACO-2), glioblastoma multiforme tumor (T98G), ovarian sarcoma (SKOV-3), and breast cancer (MCF-7) cells were used. GT was prepared at the concentration of 200 µg/mL, 100 µg/mL, 50 µg/mL, 25 µg/mL and 12.5 µg/mL, using both 5% DMSO and dH2O as solvent. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) colorimetric assay was used for in vitro cytotoxicity study. GT had no cytotoxic effect on these cancer cells since cell viability percentages were found to be above 80% for all the treatments. However, remarkable dose-dependent cell proliferation efficiency of GT at certain concentrations was observed on all cancer cells except MCF-7. In conclusion, this study suggests that cancer patients should be careful about the use of GT or products containing GT due to the increasing effect of GT on the proliferation of cancer cells.
Şanlıurfa Kent Dokusunda Önemli Yere Sahip Bazı Tarihi ve Kültürel Alanların Kurakçıl Peyzaj Açısından Değerlendirilmesi
Authors: GÜR Necmettin , KAHRAMAN Özgür
Published: February 2024

Son yıllarda küresel ısınma ve yoğun kentleşme kaynaklı kuraklık ve suyun etkin kullanılamaması önemli sorunlardan biri haline gelmiştir. Peyzaj tasarımlarında tercih edilen bitkilerin su tüketiminin yüksek olması ve yoğun çim alan kullanımları bu sorunları arttırmaktadır. Bu bakımdan peyzaj tasarım ve planlamalarında suyun etkin kullanımı oldukça önemlidir. Kurakçıl peyzaj uygulamalarında su tüketimi düşük, kuraklığa dayanıklı bitki türlerinin seçimi ve suyun etkin kullanımı sayesinde sudan tasarruf edilebilmektedir. Kurakçıl peyzaj uygulamaları yerel doğal bitki türlerinin de kullanımına olanak vermektedir. Bu çalışma, Şanlıurfa Kent Merkezi’nde önemli yere sahip bazı tarihi ve kültürel alanlarındaki bitki kullanımlarını kurakçıl peyzaj yönünden değerlendirmek amacıyla gerçekleştirilmiştir. Göbeklitepe Ören Yeri, Balıklıgöl, Şanlıurfa Arkeoloji Müzesi ve Haleplibahçe Mozaik Müzesi peyzaj ve rekreasyon alanları çalışma alanı olarak belirlenmiştir. Çalışma alanında toplam 40 bitki türü tespit edilmiştir. Bu bitki türlerinden 24’ü ağaç, 6’sı ağaççık, 8’i çalı, 1’i yer örtücü, 1’i ise sarılıcı ve tırmanıcı formdadır. Bitki türlerinin % 77.5 geniş yapraklı, % 22.5’i ibrelidir. Alanlarda kurakçıl peyzaja uygun bitki türü varlığı oranları % 28.5 ile % 50 arasında değişmektedir. Alanlarda kurakçıl bitki türleri veya yerel doğal bitki türlerinin tercih edilmesi suyun etkin kullanılmasına ve sürdürülebilir peyzaj alanlarının oluşturulmasına olanak verecektir.
Polarization Insensitive and Thin Metamaterial Absorber Performed in High-Frequency 5G Bands
Authors: ARSLAN MADAK Seher Şeyma , TEBER Ahmet , TOPKAYA Ramazan
Published: February 2024

A variety of fascinating applications, including 5G communication devices, high-speed data transfer, and large-scale Internet of Things (IoT), make life easier with 5G technology. Despite the 5G’s superior features, the percentage of electromagnetic (EM) waves in the environment execute a significant increase, unpleasantly. Broadband metamaterial absorbers are an appealing alternative to gather these unwanted signals. This study aims to numerically investigate a broadband metamaterial absorber (MMA) in the 5G high-frequency spectral range with the metasurface formed with coupled resistors. In addition, the 24.25-27.5GHz frequency range, one of the high-frequency 5G bands used by selected countries such as the European Union and China, was preferred. The minor aim of this study is that the usage of coupled elements as resistors may have the ability to increase the absorption bandwidth and magnitude. Comprehensive simulations were performed using the finite integration technique (FIT) utilized by the CST Microwave Studio program to investigate the absorber performance and other relevant parameters. The unit cell design is created metal-substrate-metal structures as asymmetric, single-layer, and easy to implement. The absorption responses are investigated according to the oblique incidence angle, polarization angle for TE &TM modes. The suggested MMA provided an absorbency response above 87.6% in the frequency range 24.20-27.30GHz under normal incidence. Moreover, to comprehend the physical mechanism on absorption, the top and bottom surfaces of the absorber's electric field and surface current distributions are assessed. The designed MMA resulting in relatively high performance and polarization insensitive is helpful for electromagnetic interference (EMI) shielding of 5G signals in the FR2/mmWave frequency regime.
Performance of Some Organic Mulch Materials for Weed Suppression, Soil Conditions and Yield in Capsicum annuum L. Cultivation
Authors: GÜRBÜZ Ramazan , ALMA Mehmet Hakkı , ALPTEKİN Harun , TÜLEK Cemal
Published: February 2024

The aim of this study was to investigate the effectiveness of different organic mulch materials and thicknesses in controlling weeds, improving soil temperature and moisture, and increasing crop yield in Capsicum annuum L. cultivation. The experiment was conducted in 2022, using three types of mulch materials (grass, chopped paper, wheat straw) and three different thicknesses (5 cm, 10 cm, 15 cm). A total of 22 weed species were identified in the experimental area, and statistical analysis revealed significant differences in all parameters between the mulch treatments and the control group. The use of organic mulch resulted in better weed control, with an increase in mulch thickness corresponding to greater suppression of annual weed species. The highest effect on weed dry weight was observed in the 15-cm paper mulch, which also produced the highest yield (3940.48 kg/da). The study also showed that soil temperature was lower and soil moisture was higher in all mulch treatments compared to the bare soil control group, with some fluctuations observed at times. Overall, the findings suggest that the use of organic mulch is crucial in arid and semi-arid regions for effective weed control, water conservation, improved water efficiency, reduced soil evaporation, and increased pepper yield.
Synthesis and Characterization of Novel Heteroarylacrylonitrile Derivatives Containing Pyrazole Scaffold
Authors: BİÇER Abdullah
Published: February 2024

2,3-disubstituted acrylonitriles derivatives are among the most important molecules in medicinal chemistry due to their bioactivity and their role as starting compounds for many bioactive molecules. Many heterocyclic structures have been investigated as AChE enzyme inhibitors. Nowadays, E/Z acrylonitrile derivatives are being studied as new AChE inhibitors. This study aimed to synthesis new heteroaryl-acrylonitrile compounds using Knoevenagel condensation. In this context, acrylonitrile compounds with aryl and heteroaryl structures at positions 2 and 3 (respectively )were synthesized from the reactions of pyrazole aldehyde derivative (4) with various acetonitrile compounds. Synthesized novel heteroarylacrylonitrile derivatives (5a-d) containing pyrazole ring are potential AChE inhibitors. The structures of the synthesized compounds were elucidated by FTIR, 1H-NMR and 13C-NMR spectroscopic techniques.
Çay [(Camellia sinensis (L.) O. Kuntze] Odun Çeliklerinin Köklenmesi Üzerine Farklı IBA (Indol-3-Bütirik Asit) Dozlarının ve Yaprak Varlığının Etkileri
Authors: AYDIN Mehmet Zahit , KALKIŞIM Özgün
Published: February 2024

Bu çalışmanın amacı; çay bitkisinin vejetatif çoğaltma yöntemlerinden biri olan odun çelikleriyle çoğaltılması kapsamında, dinlenme döneminde yıllık sürgünlerden alınan odun çeliklerine 3 farklı Indole-3-Butyric Acid hormon dozlarının ve 2 farklı yaprak varlığının köklenme üzerine etkilerini araştırmaktır. Odun çelikleri diğer çelik tiplerine göre dinlenme dönemi boyunca daha geniş bir periyotta temin edilebilme imkânına sahiptir. Bu amaçla Rize ilinin Pazar ilçesinde bulunan çay bahçelerinden alınan odun çelikleri kullanılmıştır. Odun çeliklerine kontrol ve Indole-3-Butyric Acid’in üç farklı dozu (3000, 4000, 5000 ppm) uygulanmış ve ayrıca yarım yapraklı ve tam yapraklı iki farklı odun çeliği olacak şekilde uygulama yapılmıştır. Çalışma alt ısıtmasız perlit ortamlı beton yastıkların bulunduğu polycarbon serada yürütülmüştür. Çalışma tesadüf parsellerinde deneme desenine göre 3 tekerrürlü olarak planlanmıştır. Odun çeliklerinde en iyi sonuç, tam yapraklı odun çeliklerinin 3000 ppm dozunda Indole-3-Butyric Acid hormon uygulamasından elde edilmiştir. En yüksek köklenme oranı tam ve yarım yapraklı çeliklerde 3000 ppm Indole-3-Butyric Acid uygulamasında sırasıyla %70 ve %66.6; en düşük ise yarım yaprak 5000 ppm Indole-3-Butyric Acid uygulamasında %48.3 olarak bulunmuştur.
Tüm sonuçlar dikkate alındığında çay odun çeliklerinin köklenme ve kök gelişimi üzerine, 3000 ppm dozunda Indole-3-Butyric Acid hormonu uygulaması yapılan tam yapraklı odun çeliklerinin en iyi sonucu verdiği ve bu uygulamanın önerilebileceği kanaatine varılmıştır.
Trafikte Acil Durum Müdahale Araçlarının Geçişi Esnasındaki Karmaşa Problemleri İçin AUS Tabanlı Bir Çözüm Önerisi Geliştirilmesi
Authors: AYDIN Metin Mutlu , KELEŞ Mustafa Alptekin
Published: February 2024

Artan nüfus ve araç sayısı şehiriçi yollarda tıkanıklık ve karmaşaya neden olabilmektedir. Özellikle trafiğin kesişim bölgesi olan kavşak kesimlerinde bu sorun daha belirgin olmaktadır. Kavşaklarda yaşanan karmaşa acil durum müdahale araçlarının olay yerlerine hızlı erişimini olumsuz etkilemektedir. Bu araçların müdahalede gecikmesi nedeniyle kayıplar daha da artmaktadır. Çalışmada, dijital sistemler, sensörler ve lazer ışıklandırma yardımıyla kavşak yaklaşımlarında acil durum araçlarının kullanabileceği bir sanal şerit oluşumunu sağlayan akıllı bir sistem kavramsal olarak tasarlanmıştır. Bu sistem yardımıyla lazer ışık kümesi ile belirlenen yol kesimi üzerinde bir sanal şerit oluşturularak araçların hızlı hareketlerine yönelik tüm adımlar tasarlanmış ve tasarım beş kişilik bir uzman ekip tarafından değerlendirilmiştir. İlk olarak SWOT analizi ile belirlenen faktörler uzman görüşü sayesinde ikili olarak karşılaştırılmış ve AHP metodu ile ağırlıklandırılmıştır. Uygulanan A’WOT tekniği sonuçlarından sistemin araçların hızlı hareketini sağlaması en güçlü yön, sürücülerin sanal şeridi kullanma olasılıkları en zayıf yön ve Türkiye’deki sürücülerin bu tür yenilikleri kabul etme eğiliminin düşük olması da sistemin önünde en önemli tehdit olarak belirlenmiştir. Son yıllarda acil müdahale gerektiren olayların sayısının ve sıklığının artması, sistemlerin uygulanmasında önemli fırsatlar oluştuğunu net olarak göstermekte ve çalışmanın amacını desteklemektedir.
Çarpık Eksenli Standart Çelik Profillerin Eğilme Kapasitelerinin İncelenmesi
Authors: KILIÇ Mahmut , AYDIN Abdulkadir Cuneyt , MAALİ Mahyar , SAGİROGLU Merve
Published: February 2024

Çelik yapılar gelişmişlik seviyesinin de bir göstergesi olarak günlük hayatta giderek fazla yer bulmaktadır. Ancak, çelik yapıların imalat ve montajı esnasında bazı problemlerle karşılaşılması kaçınılmazdır. Bu tür problemler büyük veya küçük boyutlu olabilmektedirler. Bu tür problemlerden önde gelen bir tanesi; standart profillerden oluşturulan kiriş sisteminde, kirişlerin yerleştirilmesi ile ortaya çıkan hatalardır. Bu durum yapının projelendirilmesi sürecinde ön görülen kabuller ile uyum göstermemektedir. Böyle bir durumda yapı hesaplanan yükleri taşıyamayacak ve yapı ciddi hasarlar alabilecek bir duruma gelebilecektir. Bu kapsamında; taşıyıcı sistemi çelik olarak imal edilen binalarda kiriş olarak kullanılan standart profillerin eksenlerinden 5°, 10°, 15°, 20° ve 25°’lik açılarla montaj sürecinde hatalı olarak yerleştirilmesi sebebiyle meydana gelecek olumsuz durumlar incelenmiştir. Çelik kirişlerin yerleştirilmesinde meydana gelen çarpıklık sebebiyle ortaya çıkan eksenden kaçıklık kiriş için projesinde ön görülen yük kapasitesi azalmış ve bu duruma paralel olarak elamanın ve/veya yapının taşıma kapasitesini de büyük ölçüde zayıflamıştır. Çarpık eksenli olarak hazırlanan çelik profillerle yapılan deneyler sonucunda yük-deplasman grafikleri elde edilerek, taşıma kapasitesindeki kayıplar; hatasız (mükemmel) profillerle karşılaştırılarak bu tür imalat veya montaj hatalarının yapıda meydana getirdiği taşıma gücü kayıpları irdelenmiştir. Elde edilen deneysel sonuçların irdelenmesiyle birlikte bu tür montaj ve/veya imalat hatalarının olumsuz etkileri ve bu etkilerin seviyesi literatüre kazandırılacak, mühendislik bilinç ve ön görüsünün gelişimimin sağlanarak geleceğe matuf muhtemel işçilik, montaj vb. hataların önüne geçilmesi planlanmaktadır.
Experimental Investigation of the Effect of Using Safflower Methyl Ester-Jet A1 Blends on Engine Performance and Emissions in Mini Jet Engine
Authors: TAŞYÜREK Mustafa , ŞEN Soner
Published: February 2024

This study focused on the investigation of the effect of the SME-Jet A1 mixture on the thrust performance, fuel consumption and pollutant emissions of a small-scale jet engine, also the alternative of safflower methyl ester (SME) to Jet A1 fuel. The experiments were carried out by using bio jet fuels obtained by mixing Jet A1 and the fuel produced from safflower oil in taxi, approach, climb and take-off power cycles of a jet engine. The thrust forces of both types of fuel obtained from the percentage power values of the aircraft under real operating conditions were determined and accordingly CO, HC, CO2 emissions, fuel consumption and exhaust gas temperature measurements were made. As a result of the measurements, approximately 27.5% reduction in thrust was observed with the use of biojet. In addition, HC emissions decreased by up to 51%, while CO emissions increased by 30% at take off while being closer to each other at low rpm. While the CO2 emissions of methyl ester increased by 8-16% depending on the speed change, fuel consumption, while at an acceptable level at low rpm, exceeded 50% at take off.
Investigation of the Structural and Electronic Properties of the Novel Synthesized Methyl 2-(2-oxo-2H-chromen-4-ylamino) benzoate Compound by DFT Method and Evaluation of its Anti-Leishmania Agent Potential by Molecular Docking Study
Authors: BAYRAKDAR Alpaslan
Published: February 2024

Leishmaniasis is a disease caused by different species of the leishmania parasite, transmitted through the sandfly, within the group of protozoa. According to the World Health Organization, leishmaniasis is one of the most encountered seven tropical diseases. Trypanothione reductase is a vital enzyme for the parasite. This has made Trypanothione reductase a potential target in the treatment of leishmaniasis. The limitations of current therapeutic options and the high cost have increased the motivation for research on the inhibition of Trypanothione reductase. In this study, the structural and electronic properties of the newly synthesized compound methyl 2-(2-oxo-2H-chromen-4-ylamino) benzoate were calculated using DFT/B3LYP and 6-311++G(d,p) basis set. The calculated structural parameters were found to be highly compatible when compared with experimental studies. The crystal packing of the compound was examined through the Hirshfeld surface analysis method. When the potential of the compound to be used as a drug was evaluated using Lipinski criteria, no hindrance to its use in living organisms was found. As the crystal structure of the enzyme was unknown, homology modeling was performed. Finally, in the molecular docking study, the interaction mechanisms of the compound mentioned in the title and the compound clomipramine used as a control in the receptor's active site were examined. The results revealed that the compound mentioned in the title demonstrated a better potential compared to the control compound.
Sensory Evaluation of Gulu Naga Ijo as a Complementary Finger Food Product
Authors: Fauziah Putri Novita , Aji Arif Sabta , Aprilia Veriani , Salfarino Ryan , MZ Rama Beka Sariy , Triwahyuni Novi , Triastanti Resti Kurnia
Published: February 2024

The development of four-star complementary foods for breast milk (Makanan Pendamping ASI or MP-ASI) products signifies the inclusion of four nutritional elements, i.e. carbohydrates, animal protein, vegetable protein, and vegetables, needed to support the growth and development of children. This study aimed to determine the sensory evaluation, including taste, texture, aroma, appearance, and color, as well as the acceptability test of finger food products known as “Gulu Naga Ijo” made from a combination of corn, eggs, dragon fruit, and green bean flour. This research was an experimental study with a completely randomized design (CRD) on five treatment variations (P0: 0% composite flour, P1: 25% composite flour, P2: 50% composite flour, P3: 75% composite flour, and P4: 100% composite flour). This study revealed a significant difference in sensory evaluation of products and composite flour substitution (p<0.05). Overall, two samples (P1 and P3) obtained the highest preference from the panelists in the sensory evaluation, prompting for test acceptability score of the products The acceptability test for toddlers resulted in scores of 1.3 for formula P3 and 1.8 for formula P1. The use of composite flour has a significant effect on the sensory evaluation and acceptance of finger food product development.
Position Analysis and Strategic Recommendations for Business Improvement in The Micro-Small Industry of Oil Palm Post-Harvest Equipment in Kampar Regency, Riau Province
Authors:   Universitas Riau, Juarsa Rahmadini Payla , Sangadah Hanik Atus ,   Universitas Riau
Published: February 2024

Many industries producing post-harvest oil palm equipment are growing in Riau Province, Indonesia because this province has a large area of oil palm plantations. Micro-small businesses dominate this industry. The micro-small oil palm post-harvest equipment industry experiences many obstacles in improving and developing its business. This research aims to analyze the position of the micro-small oil palm post-harvest equipment industry and then provide strategic recommendations to improve their business. The position analysis used is Business Model Canvas (BMC) analysis and Internal Factor Evaluation (IFE) and External Factor Evaluation (EFE) matrices. Business development strategy recommendations use the Strengths, Weaknesses, Opportunities, Threats (SWOT), and Quantitative Strategic Planning Matrix (QSPM) methods. The research results show that the company is in a growth and development phase. The top two strategies recommended for these companies are maximizing marketing channels and good cooperation through cooperatives, oil palm processing companies (such as PTPN), government agencies, and social media, and improving product quality by providing skilled human resources and research and development activities.
Optimization of Antiseptic Paper Soap through Varying NaOH Concentration: Combination of Cooking Oil, Citronella Oil, and Aloe Vera
Authors:   Universitas Syiah Kuala, Azwar Azwar , Thaib Anwar ,   Universitas Syiah Kuala, Fajar Chaidir ,   Universitas Syiah Kuala, Priatna Adjie August ,   Universitas Syiah Kuala, Zanil Mohd Fauzi ,   UCSI University
Published: February 2024

Antiseptic paper soap is convenient because it is flexible, safe for the skin, easily foams, and relatively affordable. Measuring the ratio between the concentrations of NaOH, cooking oil, citronella oil, and aloe vera additives is needed to improve the quality of antiseptic paper soap. Testing the saponification rate, density, pH, water content, fatty acid (FA) level, and free alkali content is critical to determine the characteristics of antiseptic paper soap so that it meets the standards for solid bath soap according to SNI 3532-2021 which is closest to the characteristics of paper soap because SNI for paper soap is not yet available. The weight ratio of citronella oil to cooking oil used is 1:1, 1:2, and 1:3. The NaOH concentrations used were 30%, 40%, and 50% w/v. The natural additives used are 0%, 5%, and up to 10% of the total mass. The research results showed that saponification value of the antiseptic paper soap produced was 197.724 milligrams KOH/gram up to 206.138 milligrams KOH/gram, the pH of the antiseptic paper soap was 9.1-10.6, the water content value was 10.940%-23.863%, the alkali content value free is 0.044%-0.104%, total fatty acid (FA) content is 29.688%-45.734%. The best antiseptic paper soap is produced using 30% w/v NaOH with a weight ratio of citronella oil to cooking oil used of 1:1 and natural additives (aloe vera) 5% of the total mass.
Supplementation of Antioxidant Liang Tea Extracts on Goat Milk Cream Cheese
Authors:   Universitas Tanjungpura, Zahrah Syarifah , Dewi Yohana Sutiknyawati Kusuma ,   Universitas Tanjungpura, Hartanti Lucky ,   Universitas Tanjungpura
Published: February 2024

Cream cheese is a soft cheese that does not go through a ripening process and is widely used in various kinds of food preparations. Goat's milk is an alternative milk for cream cheese production. The addition of antioxidant extract from liang tea potentially produces functional cream cheese. This research aimed to obtain the concentration of added antioxidant liang tea extract in the formulation that produces the best characteristics of goat's milk cream cheese. This research used a Randomized Block Design method with one factor: the concentration of liang tea extract as an antioxidant. The treatment consisted of 5 levels of liang tea concentrations, 0%, 1.5%, 2%, 2.5%, and 3%, with five repetitions. The research showed that adding various concentrations of liang tea antioxidant extract produced a water content of 61.06%-62.09% and a fat content of 12.68%-14.46%. The resulting color characteristics with the L* value range from 60.83-76.43 (decreasing brightness), the* value range from -6.69-6.71 (reddish), and the b* value range from 4.47-23 .88 (yellowish). Antioxidant activity is expressed by percent inhibition of 1,1-diphenyl-2-picrylhydrazil (DPPH), ranging from 36.00%-79.56%. The antioxidant activity of goat's milk cream cheese increases if the addition of liang tea extract is high. Based on the effectiveness index, the best goat's milk cream cheese is produced by adding a 3% concentration of liang tea. The cream cheese has a water content of 62.19%, a fat content of 14.46%, color (L* = 60.83, a* = 6.71, b* = 23.88), and antioxidant activity of 79.56%.
Impact of ImarsilTM Adsorption on Aflatoxin M1 (AFM1) Levels in Cow's Milk: Analyzing Hematological Parameters and Histopathological Alterations
Authors:   Augustine University, Kolapo Adelodun Lawrence , Oluwafemi Flora ,   University of Agriculture, Kareem Sarafadeen ,   Federal University of Agriculture, Fawole Abosede Oyeyemi ,   The Polytechnic, Adejumo Olufunmilayo Ebunoluwa ,   Onabanjo University
Published: February 2024

The efficacy of ImarsilTM in mitigating the effects of aflatoxin M1 (AFM1) in cow's milk on hematological and histopathological parameters was investigated in this study. Seventy-two albino rats were randomly allocated to four treatment groups A - D in a six-week study. Rats in all groups were fed standard ration. In addition, 2 mL of clean distilled water, 2 mL of milk, 2 mL of AFM1 contaminated milk (456 ng/L), and 2 mL of AFM1 contaminated milk (456 ng/L) treated with ImarsilTM at 2% dosage rate were added to the ration of animals in groups A, B, C, and D respectively. The results of the investigation showed that rats in Group C developed a significant (p<0.05) lower weight. Packed Cell Volume (%), Hemoglobin (g/dL), Red Blood Cell (106/mm3), Mean Corpuscular Volume (fL), Mean Corpuscular Hemoglobin (pg), and Mean Corpuscular Hemoglobin Concentration (g/dL) were not significantly different (p>0.05) among the different groups. In group C, a significant reduction (p<0.05) occurred in the white blood cell (103/mm3) (12.90 - 8.63), and lymphocytes (87.00 - 74.33%) counts while the neutrophils (%) increased from 13.00 to 25.67. In contrast to those in Group C, tissue sections from Group D showed no histological lesions. Therefore, ImarsilTM represents an effective and safe adsorbent for the remediation of AFM1-contaminated milk.
The Role of Cognition in Balance Control
Authors: Nazrien Nazrien M.D , Novitri Novitri , Prabowo Tertiano , Arisanti Farida
Published: February 2024

Balance is the ability to move and/or preserve a particular position while not falling under external force. Human balance is a complex process of integration and coordination of the sensory, motor, and biomechanical components, which is influenced by intrinsic and exogenous factors. One inherent factor that is hypothesized to have an impact on balance is cognition. However, studies about cognition's role in balance control are still limited, and study literature is needed to gain a better understanding. Cognition is involved in various thinking processes. Attention, memory, visuospatial, and executive functions are among the cognitive areas integrated with information processing in the processing of information, followed by a reaction that aims to preserve body balance and prevent falls. Cognition limitation has been linked to decreased function associated with gait alterations, mobility limitation, and increased risk of falling. Cognitive function impairments such as executive function (EF) limitations are thought to increase the risk of losing. Injury to the cerebral cortex, basal ganglia, and cerebellum can also affect the cognitive function in balance. The role of cognition in maintaining physical balance is critical. Deficits in cognitive function caused by diseases or injuries will impact bodily balance control.
Living on High Altitudes Associated with Reduced Requirements of Exogenous Erythropoietin in Patients on Chronic Hemodialysis
Authors: Benítez André , Garrido David , Banegas Andrea , Mena María Belén , Osorio Washington , Rico-Fontalvo Jorge , Raad-Sarabia Maria , Daza-Arnedo Rodrigo , Cardona-Blanco Maria , Rodriguez-Yanez Tomas , Sierra-Torres Liseth
Published: February 2024

Introduction: During the last decades the use of erythropoiesis stimulating agents has significantly diminished the prevalence of anemia in patients receiving chronic hemodialysis. Currently, residing at higher altitudes is associated with higher levels of endogenous erythropoietin.
Objective: This study aims to analyze how residing at higher altitudes influences the requirements of exogenous erythropoietin in patients receiving hemodialysis as renal replacement therapy.
Methodology: Descriptive observational cross-section, including adult patients from three Ecuadorian centers, receiving chronic hemodialysis, between January and June 2020. Patients were classified into two groups regarding the altitude of residence: those living at low-lying regions (<2000 masl, Santo Domingo de los Tsachilas and Tena) and those living at high altitude (>2000 masl, Quito).
Results: We included 580 patients, 45.5% in the high-altitude group and 54.5% at low-lying regions. Median exogenous erythropoietin dose was higher in low-lying regions (22000 international units) versus high altitude (17333.3 international units) (P=0.00003) and the proportion of patients without erythropoietin requirement was higher in high altitude (21.6%), compared to low regions (1.0%) (P<0.01). The multivariate analysis associated residing in low regions (HR 58.9, P<0.01), age (HR 0.98, P=0.03) and Kt/V (HR 38.5, P<0.01) with higher exogenous erythropoietin requirements. Additionally, among patients who required erythropoietin, residing in lower altitudes was linked with a need for exogenous erythropoietin doses exceeding 15000 international units per week (HR 1.92, P=0.001).
Conclusion: In Ecuadorian patients receiving hemodialysis, living at high altitude is associated with a reduced requirement of exogenous erythropoietin compared with those patients residing in low-lying regions.
“Old” and “new”, “first” and “last” in the works of N. Abgaryan: on the linguistic representation of time modes
Authors: Чжао С.
Published: February 2024

Исследование посвящено выявлению способов репрезентации модусов времени в художественном тексте на материале произведений Н. Абгарян. Высказывается гипотеза о возможности соотнесения модусов времени с особым макроконцептом «Время», значимое место в структуре которого занимают понятия «старый» и «новый», «первый» и «последний». Делается вывод о том, что ключевую роль для авторской картины мира играет модус прошлого; при этом мотивы смерти, тяжелых испытаний в прошлом тесно переплетаются с идеей победы жизни над смертью, надежды на лучшее настоящее.

The research focuses on identifying the ways of the time mode representation in the literary text on the material of Narine Abgaryan's works. It is hypothesized that the time modes can be correlated with a special macro-concept “Time”, a significant place in the structure of which is occupied by the concepts of “old” and “new”, “first” and “last”. It is concluded that the key role for the author's picture of the world is played by the past mode; in this case, the death motifs, severe trials in the past are closely intertwined with the victory of life over death, hope for a better present.
Diagnostics of the formation of future army officer's enculturation personality
Authors: Матвеев Д.Е. , Беловолов В.А. , Беловолова С.П. , Собищанский С.А.
Published: February 2024

Авторы статьи представили результаты экспериментального исследования по формированию инкультурационной личности будущего офицера в интеркультурной образовательной среде военного вуза. В статье была рассмотрена динамика и специфика данного процесса. Предложены механизмы его формирования и диагностики. Обоснован критериально-диагностический инструментарий. Представленные данные опытно- экспериментального исследования показывают, что формирование инкультурационной личности будущего офицера в интеркультурной образовательной среде военного вуза обосновано.

The authors presented the organization and results of an experimental study related to the formation of future army officer's enculturation personality in the intercultural educational environment of a military university. The authors considered the dynamics and specifics of the process under study. The mechanisms of formation and diagnostics of the process are proposed. The authors also substantiated criterion-diagnostic tools. The presented data of an experimental study demonstrate that the formation of the future officer’s inculturation personality is expedient in the intercultural educational environment of a military university.
Improvisational readiness of a future teacher-musician for situational choice in practical activity
Authors: Субботина И.В. , Сигова В.Л.
Published: February 2024

В статье рассматриваются вопросы импровизационной готовности будущего педагога-музыканта к ситуативному выбору в практической деятельности. Раскрыты понятия «музыкально-педагогическое общение», «предметная среда», «импровизационная готовность», «ситуативный выбор». Сформулированы педагогические условия, способствующие формированию импровизационной готовности будущего специалиста. Определены критерии, показатели и уровни импровизационной готовности студентов к ситуативному выбору в условиях педагогической практики. Проанализированы предварительные результаты исследования и обозначены его дальнейшие перспективы.

The article discusses improvisational readiness of the future teacher-musician for situational choice in practical activities. The concepts of “musical and pedagogical communication”, “subject environment”, “improvisation readiness”, “situational choice” are revealed. Pedagogical conditions contributing to the development of the future specialist’s improvisational readiness are formulated. The paper also considers the criteria, indicators and levels of students’ improvisational readiness for situational choice in the conditions of teaching practice. The authors analyzed the preliminary results of the study and outlined its future prospects.
“The linguistic landscape as a result of spatio-temporal and sociocultural dynamics”: report on the XIV All-Russian school-seminar of young lexicologists, lexicographers and linguogeographers
Authors: Ильина Е.Н. , Крылова О.Н. , Мельникова Н.Г. , Фишер Н.Л.
Published: February 2024

Данная статья представляет собой научный отчет о работе XIV Всероссийской школы-семинара молодых лексикологов, лексикографов и лингвогеографов, состоявшегося в ноябре 2023 г. Отмечены доклады выступающих, проблемы, затронутые в обсуждениях и дискуссиях, представлена общая проблематика, интересующая молодых исследователей.

This article is a scientific report on the XIV All-Russian school-seminar of young lexicologists, lexicographers and linguogeographers held in November 2023. The speakers' papers, the problems raised in the discussions and debates are highlighted, the general issues of interest to young researchers are presented.