bluuebunny/crossref_metadata_2025 huggingface dataset:
Commemoration | Centenary: Memorials and the Making and Unmaking of Settler History
Authors: Witz Leslie , Pohlandt-Mccormick Helena
Published: March 2022

This discussion originally took place as part of the Sounding the Land exhibition curated by Simon Gush, Helena Pohlandt-McCormick, Craig Paterson and Gary Minkley at the virtual National Arts Festival that ran from 25 June 5 July 2020. Sounding the Land (https://soundingtheland.co.za/) intended to use the bicentennial of the so called 1820 settlers' arrival as a critical platform from which to discuss the legacies of the settler colonial project, the ways in which it is commemorated, and to reassess the historical understandings of the 1820 settler moment in South African history. In the following discussion, which took place via Zoom Video Communication and was originally recorded on 2 June 2020, between Leslie Witz in Cape Town (6 pm South African time) and Helena Pohlandt-McCormick in San Francisco (9 am Pacific time) they talk about the cyclical and accumulative power of anniversary and commemoration, the ways they set in place temporal certainties that align past, present and future, and how configurations of memorial space through visual technologies are authoritative mechanisms in establishing the time and times of history. They discuss strategies of resisting such memorial power and whether the simple inversion of historical figures and events may inadvertently serve to reinforce anniversary histories of founding. By linking the contemporary moments of the interview the COVID-19 pandemic, the postponement of settler commemorations, the virtual National Festival, and the killing of George Floyd in Minneapolis they consider dystopian futures as inaugurating the possibilities of disruptive memorial time that constantly exposes the fractures of racial violence and colonial dispossession rather than masking it through either the commemoration or the inversion of the anniversary.
Headlands and Headings: Re-locating the Coloured Category
Authors: Thumbran Janeke
Published: March 2022

In this paper I make two arguments: first, that the Western Cape has always functioned as the epistemological heading of the 'coloured' category. This is because it is in the Western Cape where the category first emerged as a descriptor for the 'mixing of blood', and where knowledge around the category was first produced through the appointment of commissions of inquiry. In addition, intellectuals in the Western Cape based primarily at Stellenbosch University (SU) also produced knowledge by drawing on the concept of heredity, and attaching inherited racial traits or characteristics to the 'coloured' category. The second argument is that by the late 1930s, a new epistemological heading emerged in the Transvaal, where intellectuals from the University of Pretoria (UP) would engage with the category through the emerging discourse on bloedvermening or miscegenation. To these Pretoria-based intellectuals, 'coloured' was no longer just a marker for the 'mixing' of blood that originated in the Western Cape, but represented a threat to the heredity of the Afrikaner volk in the Union as a whole. Intellectuals in the Transvaal were less concerned with ascribing hereditary traits to the 'coloured' category, and more preoccupied with how those characteristics would affect the white racial imprint through miscegenation. By arguing that the Transvaal emerged as a new heading on the 'coloured' category, I am suggesting that another epistemological direction is on offer one that departs from the form, the sign, or the logic of the heading of the Western Cape.
Mine-impacted water: From waste to resource
Authors: Clay A.N. , Joubert S. , Moeketsi N.N.
Published: March 2022

For many years, mine-impacted water has been regarded as a problem and linked to long-term environmental liabilities. However, this water can be a renewable and a sustainable resource, provided that it is managed in a responsible and sensible manner. South Africa's National Water Resource Strategy (NWRS, 2013) considers water that can be used to contribute to economic activity to be a water resource. Although all water resources are considered as belonging to the State, government does not appear to have meaningfully explored the use of mineimpacted water to contribute to the country's economic activity. Africa is blessed with more sunshine than anywhere else, apart from Australia, yet we see no rollout of vast quantities of solar panels to ensure every African family has access to affordable power. This suggests that governments are incapable of managing such a free resource. At the same time, apart from the equatorial areas, water is a seriously constrained resource and yet we expect the same entities to manage a commodity none of us can live without. This paper explores the conversion of mine-impacted water from waste to a resource and how the inclusion of other stakeholders (such as water users, landowners, and ordinary South Africans) could benefit the process.
Water contribution of the “Tres Ríos” River, according to the recessive flow, for the hydrological years 2008-2015, Cajamarca, Peru
Authors: Alvarez Jairo , Huamán José
Published: March 2022

The objective of the study was to quantify the contribution of water from the river "Tres Ríos" of the micro-basin of the same name. There was used two mathematical models: Maillet (1905) and Boussinesq (1904). The depletion curve was identified from the second break point, with hydrometric information since the period 2008 to 2015, it obtained in the Ronquillo diversion catchment to the same river. The simulated flows were contrasted with the observed flows of the “Tres Ríos” river, it used the following statistical indicators: Nash-Sutcliffe (0.71), Standard Error of Estimation (0.034), Modified Willmott Index (0.70) and a parametric statistical test (T Student). It was determined that the Maillet model (1904) it did not generate near depletion flows to the observed flows of the “Tres Ríos” river; however, the Boussinesq model (1904) generated underestimated depletion flows to the observed flows. With the Boussinesq model (1904), the average monthly depletion flows were generated and the contribution of water in the Ronquillo catchment of the micro-basin was estimated, it obtained an average monthly volume of 4.31 MMC.
Use of unauthorized pesticides in primary agricultural foods, Peru (2011-2018)
Authors: Correa Germán , Rojas Jesús
Published: March 2022

The monitoring of contaminants that affect the safety of primary agricultural foods began in 2011 in Peru. A documentary review of the monitoring reports published on the website of the National Agricultural Health Service of Peru (SENASA) was carried out between the years 2011 to 2020, however there was no complete information about concentration of unauthorized pesticides (UP) in relation to the maximum limit of residues and by geographic region, and type of pollutant, particularly the years 2019 and 2020, so the analysis is restricted to the period 2011-2018 verifying the use of no less than 20 unauthorized pesticides of which a minimum of two have been made. applications per crop, being the crops with the highest use of UP: lemon (7 UP); tomato, mandarin and grapes (5 UP); banana (4 UP); and oranges and pallar (3 UP), being chlorpyrifos and carbendazim the UP that were used in up to five crops, which would be explained by their wide spectrum of action. Monitoring is required to determine the concentrations of the UP according to culture, in relation to the maximum residue limits, and to the withdrawal period.
Borax and boric acid impregnation into Guadua angustifolia Kunth cane by immersion method
Authors: Simisterra Juan , Cervantes Roberto , Ona Lorena , Lajones Digmar
Published: March 2022

Guadua angustifolia Kunth cane is a material that has a great potential for industrialization, but it lacks a technical guide for its preservation. The objective of this research was to quantify impregnation levels of the boron salt preservative applied by the immersion method in Guadua angustifolia Kunth cane. Fresh mature cane test tubes were used, which were oven-dried and submerged during different time periods in a solution made of borax and 4% boric acid. For the qualitative analysis, the specimens were cut in half crosswise and the segments were exposed to revealing substances made from Curcuma longa and hydrochloric acid. Additionally, the dimension of the coloration obtained after this chemical reaction was evaluated through quantitative analysis using formulas. The main results showed that, in order to obtain absorption levels higher than 200 kg/m3, it is necessary that the samples have a moisture content of less than 15% prior to preservation. In addition, it was established that an immersion time of at least 72 hours guarantees reaching an effective retention toxic level of 0.40 to 0.50 kg/m3 active product.
Tutoring and counseling program in the performance of students from a professional school of education
Authors: Paredes-Ayrac Dany , Olórtegui-Mariño Rufa , Kaqui Valenzuela Madeley , Camones-Bazan Eling
Published: March 2022

La calidad del servicio educativo está relacionada directamente con el logro perfil profesional, para ello no basta con desarrollar sesiones de aprendizaje; es importante concretar acciones de seguimiento y acompañamiento para evitar el riesgo académico, de allí la importancia de experimentar la influencia de un programa de tutoría y consejería. El objetivo del estudio fue demostrar la influencia de un programa de tutoría y consejería en el desempeño de los estudiantes universitarios. La investigación se caracterizó por el enfoque cuantitativo, con alcance explicativo; la guía de investigación se alineó al diseño cuasiexperimental. En este estudio participaron 6 tutores, 1 psicólogo y 160 estudiantes de cuatro carreras profesionales de educación (Huaraz, Perú). Se aplicó un cuestionario para recoger información general como el ámbito personal, familiar, social, académico, de salud, y el vocacional. Los resultados de la puntuación del desempeño académico, así como los resultados de percepción señalan que estadísticamente es significativa la aplicación de un programa de intervención tutorial que contribuye a mejorar el desempeño de los estudiantes. En virtud a ello, se llegó a la conclusión de que existe influencia directa del programa de tutoría y consejería en el rendimiento académico de los estudiantes que participaron en el estudio.
Accounts receivable management and its effect on liquidity in a Trujillo transportation company
Authors: Villavicencio Zare Yesenia , Soto Abanto Segundo Eloy , Calvanapón Alva Flor Alicia
Published: March 2022

El presente artículo tiene como objetivo determinar el efecto de la gestión de cuentas por cobrar en la liquidez en una empresa de transportes de Trujillo. La metodología es de diseño no experimental de corte transversal bajo el enfoque cuantitativo con un alcance descriptivo. La técnica utilizada fue documental para analizar cada variable en los periodos 2015 - 2019 de la empresa en estudio. Entre los principales resultados se encontró que, la empresa realiza una deficiente gestión de sus cuentas por cobrar ello se muestra en los 198 días de periodos de cobro por el servicio de carga y la disminución de su rotación de cuentas en 1.8 veces, en cuanto a su liquidez al año 2019 su ratio de liquidez corriente fue de 0.77, la liquidez absoluta fue de 0.39, su prueba ácida fue de 0.72, y el capital de trabajo fue de -1,728,703.00 por lo que su activo corriente no fue capaz de cubrir sus pasivos a corto plazo, llegando a la conclusión que la gestión de cuentas por cobrar tiene efecto negativo en la liquidez de la empresa.
Level of knowledge of the smart city approach model and need for implementation, in resilience post COVID-19
Authors: Velarde Araujo Jaime Oliver , Rojas Lujan Víctor William
Published: March 2022

El objetivo del presente estudio es determinar el Nivel de conocimiento del modelo con enfoque de ciudades inteligentes y necesidad de implementación, en resiliencia post covid19 Trujillo, 2021. Se realizó una encuesta, cuya muestra se conformó por 384 habitantes de Trujillo según la fórmula de la muestra, así mismo se aplicó cuestionario, donde se analizó el nivel de conocimiento de los empleados del municipio y de los habitantes de Trujillo. En los resultados se puede observar el nivel que predomina en la variable conocimiento del modelo con enfoque de ciudades inteligentes de la muestra encuestada, es el nivel muy bajo con un 37.5%, seguido del nivel bajo con un 35.7%, y finalmente el nivel medio con un 18.5%. Mientras que en la necesidad de implementar en resiliencia post covid19, el nivel que predomina es el nivel medio con un 35.2%, seguido del nivel alto con un 22.7%, y finalmente el nivel bajo con un 21.6%. Se analizó el nivel de conocimiento del modelo basado en enfoque de ciudades inteligentes y la necesidad de implementar el modelo en la resiliencia post covid19 Trujillo, mediante las pruebas de Tau-b de Kendall y Rho de Spearman encontrándose que hay correlación y es de tendencia muy significativa. (t = 0.688, p = 0.000, positiva muy alta 0.01), (Rho = 0.830, p = 0.000, positiva muy alta 0.01).
[RETRACTED] Hawkeye CBD Gummies Shark Tank - Keanu Reeves v1
Authors: not provided hawkeyegummiesreeves
Published: March 2022

[RETRACTED]

Hawkeye CBD Gummies Shark Tank - Keanu Reeves
Pedestrian gaps and walking speed at uncontrolled midblock crosswalks
Authors: Guío-Burgos Fredy Alberio , Combariza-Pinzón María Johana , Cerquera Escobar Flor Ángela
Published: March 2022

This study seeks to understand the behavior of pedestrians who cross the street mid-block where vehicles travel while making use of existing vehicular gaps. This study was carried out in the city of Tunja and information was collected in order to obtain data on the accepted gap and crossing speed which was then correlated to variables such as age, gender, type of vehicle, group formation, reduced mobility conditions, walking time, walking vs. running, and if the person crosses with children, among others. A statistical characterization was performed on the above information, obtaining relationships that may be of interest in understanding pedestrian behavior in the city. We found that the gap accepted by a pedestrian is directly proportional to the walking time and the time used to make the crossing is near 50% of the critical gap. The variables that were more significant in the size of the gaps accepted by pedestrians at the crossing were: the type of vehicle, the type of gap, and the walking time.
The Strategic Value of Participating in Information Security Research: Evidence from the Finance, Healthcare, and Insurance Industries
Authors:   North Carolina Agricultural and Technical State University, Johnson Alice
Published: March 2022

The pervasiveness of information-based organizations, combined with the escalating number of security breaches, has resulted in the need for better information security. Nevertheless, obtaining subjects for information security research is challenging. Structured interviews were conducted with thirteen information security managers in the finance, healthcare, and insurance industries to investigate the effect of the perceived strategic value of participating in information security research on the decision to participate in such research. Subramanian and Nosek’s (2001) perception of strategic value of information systems (PSVIS) framework was used to guide the interviews. The results showed that the perceived strategic value of participating in information security research influenced the decision to participate. A model of the strategic value of participating in information security research is provided. It suggests that access to information for strategic decision making directly influences the decision to participate and two other factors (information intensity and strategic necessity) moderates that relationship.
Information Technology Implementation and Organizational Change: A Dissipative Structure Theoretical Lens
Authors:   Binghamton University, Yayla Alper , Lei Yu ,   SUNY College at Old Westbury
Published: March 2022

Previous research on information technology (IT) implementation and organizational change postulates that neither technology nor human agency determines the new structure of the organization, but rather the new structure emerges as a result of the interplay between technology and human agency. A majority of these studies assume a linear relationship between contingencies and outcome during the emergence process. However, during the implementation process, the characteristics of organizations become non-linear, almost chaotic. Therefore, we postulate that approaching to IT-enabled change from complexity theory would be better suited to explain the emergence process. We propose a framework based on dissipative structure theory and specify four stages that organizations undergo during the implementation process. While the emergence process is considered unpredictable, we argue that with the help of certain organizational practices (i.e., organizational learning/unlearning) and managerial interventions (i.e., use of rhetoric), organizations can condition the emergence of the new structure for the success of the implementation.
Surveillance Concerns as Predictors of Obfuscation and the Chilling Effect in the Context of a Pandemic
Authors:   Louisiana Tech University, Van Slyke Craig , Clary Grant , Tazkarji Mohamed ,   College of Charleston
Published: March 2022

Potential negative consequences of digital surveillance represent an area of increasing concern due to the rising impact of digital and mobile technologies on daily life. The COVID-19 pandemic increased these concerns as governments worldwide turned to both digital and non-digital surveillance to help in the battle to control the spread of the disease. Due to this, surveillance creep (the use of supposedly limited-scope surveillance for increasingly pervasive purposes) is a growing concern. Concerns over digital surveillance have led to some individuals turning to protective measures, including obfuscation and the chilling effect. Obfuscation involves intentionally providing ambiguous or misleading information to interfere with surveillance activities. The chilling effect is the decision to not engage in some behavior due to concerns about the consequences of that behavior. Often, obfuscation is a general protective measure that guards against surveillance across applications and reflects general concerns about privacy and surveillance. In contrast, the chilling effect is application and concern specific. In this paper, we use a research model that draws on the health beliefs model and protection motivation along with data from a survey of American social media users to investigate antecedents of obfuscation and the chilling effect in the context of social media surveillance related to COVID-19. Results indicate that age, sex, social media experience, social media habit, and the perceived surveillance severity impact obfuscation. These same antecedents affect the chilling effect, as does perceived surveillance vulnerability. Although our research is exploratory, the results of our study hold implications for both research and practice.
Compressive Strength Properties of Cassava Peel Ash and Wood Ash in Concrete Production
Authors: Olubunmi A Adetoye , Taiye J. Afolayan , Tobi Asekunowo
Published: March 2022

High rate of increase in the prices of cement is worrisome and become burden to people in the entire construction industry. Researchers, civil engineers, builders, architects and all concerns parties in the building industry are desperate for any suitable and effective but cheaper materials that can replace cement. There is need to find an alternative binding material that can be used mainly or in partial replacement of cement. The materials used were sourced from Bida town, Niger state, Nigeria. Wood ash and cassava peel ash were obtained after burning in the furnace at National Cereal Research Institute Badeggi, Bida into ash and passed through 75 micro meter sieve to the finest texture. The water use for the work was free from impurities. The comparative study on the compressive strength of concrete when OPC was partially replaced independently by some percentage of cassava peel ash (C.P.A) and wood ash (W.A) using 0%, 5%, 10%, 15%, 20% and 25% on both materials, 0.5 water-cement ratio and mixed design ration of 1:2:4. The mean strength of concrete at control is 0% (27.11N/mm2), 5% (24.44N/mm2), 10% (23.25N/mm2), 15% (23.36N/mm2), 20% (18.52N/mm2) and 25% (15.93N/mm2). 25% replacement of cement has the lowest mean strength at 28 days. Replacement at 5, 10 15% are within specification of (20N/mm2) for plain concrete while 20 and 25% are not suitable for structural concrete. The higher the pozzolanic material added to the cement in concrete production the lower the strength. The effects of Cassava Peel Ash and Wood Ash as environment pollution can be reduced when utilized as part of cement in concrete production.
Stachys macrantha (K.Koch) Stearn’ın Biyolojik Aktivitesinin Belirlenmesi
Authors: ÖZCAN Kadriye , ACET Tuba
Published: March 2022

Stachys, Lamiaceae familyasının en geniş yayılış gösteren cinslerinden birisidir. Bu cinse ait türler biyolojik aktiviteleri ve etnomedikal kullanımları ile bilinmektedir. Bu çalışmada, Stachys macrantha’nın toprak üstü kısımlarının farklı çözücülerle (etanol, metanol ve etil asetat) elde edilen ekstraktlarının toplam fenolik ve flavonoid içeriği ile antioksidan (ABTS, DPPH) ve enzim inhibisyon (α-amilaz, α-glukozidaz, bütirilkolinesteraz ve asetilkolinesteraz) aktiviteleri spektrofotometrik yöntemlerle araştırılmıştır. Ayrıca, fenolik bileşen analizi HPLC ile analiz edilmiştir. Bulgulara göre, metanol ekstraktının diğer ekstraktlara kıyasla biyolojik aktivitelerinin dikkat çekici olduğu bulunmuştur. Ekstraktın, toplam fenolik (45.57 mg GAE/g ekstrakt) ve flavonoid (54.48 mg QE/g ekstrakt) içeriği, antioksidan özellikleri [ABTS (49.99 mg TE/g ekstrakt), DPPH (23.62 mg TE/g ekstrakt)] ile enzim inhibisyon aktiviteleri [α-amilaz (159.35 mmol ACE/g ekstrakt), α-glukozidaz (8.78 mmol ACE/g ekstrakt), bütirilkolinesteraz (5.85 mmol ACE/g ekstrakt) ve asetilkolinesteraz (1.25mmol ACE/g ekstrakt)] belirlenmiştir. Metanol ekstraktının majör fenolik bileşenlerinin kaemferol (539.65 µg/g ekstrakt) ve kuersetin (271.65 µg/g ekstrakt) olduğu tespit edilmiştir. Elde edilen sonuçlara göre, bitkinin tespit edilen aktiviteleri sayesinde ilaç, gıda ve kozmetik endüstrilerinde kullanılma potansiyeli olduğu söylenebilir. Bununla birlikte, söz konusu verilerin daha ileri çalışmalarla desteklenmesi ve aktif bileşenlerin saflaştırılarak etkilerinin in vivo ortamlarda belirlenmesi gerekmektedir.
Mamografik Kitle Sınıfının Makine Öğrenmesi Teknikleri ile Tespiti
Authors: ERİŞ Ömer , BULUT ERİŞ Seval , BOZKURT Mehmet Recep
Published: March 2022

Meme Kanseri, dünyada kadınlar arasında ölüme neden olabilen kanser tiplerinin en sık görülenlerinden biridir. Günümüzde meme kanseri teşhisinde farklı görüntüleme yöntemleri kullanılmakla birlikte bu yöntemler zaman zaman gereksiz biyopsiye yönlendirebilmektedir. Bu çalışmada, Makine Öğrenmesi Tekniklerinden, Karar Ağaçları ve Yapay Sinir Ağları yöntemleri kullanılarak mamografik kitlenin sınıfı, hastaya ve kitleye ait özelliklerin değerinden tespit edilmiştir. Karar Ağaçlarında, GINI algoritması kullanılmış ve RapidMiner programından yararlanılmıştır. Yapay Sinir Ağlarında, ileri beslemeli geri yayılımlı ağ modeli MATLAB’de yazılan program aracılığı ile kullanılmıştır. Bu çalışmada kullanılan veri seti, Erlangen-Nuremberg Üniversitesi, Radyoloji Enstitüsü, Jinekolojik Radyoloji bölümünden elde edilen 961 örnekten oluşmaktadır. Her örnek için 5 adet özellik mevcuttur. Bu özellikler, BI-RADS (Meme Görüntüleme Raporlama ve Veri Sistemleri) değerlendirmesi, Yaş, Kitle Şekli, Kitlenin Kenar Boşluğu ve Kitlenin Yoğunluğu bilgilerini içermektedir. Yaklaşımımız, mamografide tespit edilen kitleleri iyi huylu ve kötü huylu olmak üzere iki farklı sınıfa ayırmaktadır. Her iki yöntemin başarı analizleri ve karşılaştırılması, hata matrisindeki değerler kullanılarak doğruluk, duyarlılık, kesinlik, seçicilik ve F-skor değerlerine bakılarak yapılmıştır.
Classification of 1D and 2D EEG Signals for Seizure Detection in the Newborn Using Convolutional Neural Networks
Authors: AÇIKOĞLU Merve , ARSLAN TUNCER Seda
Published: March 2022

Newborns do not always show clinical symptoms during seizures unlike adults. Therefore, uncontrolled seizures lead to serious brain damage. Timely detection of seizures plays a vital role for newborn babies. In this study, a deep transfer learning approach was proposed for automatic seizure detection on the C4-P4 channel using electroencephalography (EEG) signals of newborns. EEG signals have been used in 1D and 2D dimensions to ensure performance, robust functionality, and a clinically acceptable level of detection accuracy. Pre-trained deep learning models Alexnet, ResNet, GoogleNet and VggNet were used in the study. Spectrograms were obtained by converting 1-dimensional signal data to 2-dimensional images, and then the classification was made on both 1D and 2D data set. In 1D classification, the highest performance was obtained from VggNet architecture with 91.67%, while 2D classification was obtained from AlexNet and ResNet architecture with 95.83%. The use of spectrograms has greatly improved the classification performance and made seizure detection and decision clinically more reliable in newborns.
Polipropilen Lif Takviyeli Pomza Tozu İçeren Harçların Fiziksel ve Mekanik Özellikleri
Authors: COŞKUN Adile , SARIIŞIK Ali
Published: March 2022

Bu çalışmada çimento harçlarına pomza tozu ikamesinin ve polipropilen lif takviyesinin fiziksel ve mekanik özelliklere etkisi araştırılmıştır. Harç örnekleri hazırlanırken CEM I 42.5 R tipi portland çimento ve standart kum kullanılmıştır. Su/bağlayıcı oranı ise 0.5 olarak sabit tutulmuştur. Karışımlara ilave edilen pomza tozu çimento yerine %10 oranında ikame edilmiştir. Polipropilen lif 6 mm uzunluğunda kullanılmıştır. Polipropilen, pomza ikameli harçlara hacimce %0.0, %0.2, %0.4 ve %0.8 oranlarında ilave edilmiştir. Kontrol karışımına ise lif ve pomza tozu ilave edilmemiştir. Karışımlar 5×5×5 cm ve 4×4×16 cm'lik metal kalıplara yerleştirilmiş ve bir gün laboratuar ortamında bekletildikten sonra ilgili örnekler kalıplardan alınarak 28 gün su kürü uygulanmıştır. Tüm örnek serileri üzerinde; yayılma tablası deneyi, su emme, ultrases, dinamik elastisite modülü, sertleşmiş birim ağırlık deneyi, eğilme dayanımı deneyi, eğilme deneyi sonrası basınç dayanımı deneyi uygulanmıştır. Sonuç olarak pomza tozunun basınç dayanımını, eğilme dayanımını, ultrases geçiş hızı değerini, dinamik elastisite modülünü kontrol karışımına göre bir miktar arttırdığı, su emme değerini düşürdüğü tespit edilmiştir. Lif ilavesiyle birlikte eğilme dayanımını optimum lif oranında arttırdığı ancak basınç dayanımını bir miktar azalttığı gözlemlenmiştir.
Digital Forensic Analysis of Wallapop Application on Android Operating System
Authors: İPEK Elifnur , AKBAL Erhan
Published: March 2022

The use of second hand shopping applications is increasing day by day. Applications can be used for product search, product sale / purchase, product search / search, specific filtering for the searched product, product selection by category, saving searched products, product listing and messaging with people. There may be situations that may create legal problems between users in shopping applications. Defamation, fraud, fraudulent products, sale of prohibited substances are carried to judicial authorities. Wallapop app is a second hand sales app with more than 10 million downloads on google play store. Application were examined by XRY, Praben, Oxygen, Axiom, Ufed and Autopsy Forensic examination programs and no characteristic information about the application could be obtained. In the study, manual forensic analysis of Wallapop application on mobile devices with Android operating system was performed and an examination method was proposed. In the study, manual forensic analysis of Wallapop application on mobile devices with Android operating system is performed and a methodology about the artifacts produced by Wallapop application, their analysis and the relations with each other is presented. The contents of the database files, location information, session information and other data that may be considered as evidence are shown.
FAILURE-BASED MAINTENANCE PLANNING USING BAYESIAN NETWORKS: A CASE STUDY HYDRAULIC TURBINE
Authors: KAHRAMAN Gökhan , YÜCESAN Melih
Published: March 2022

The assessment of existing infrastructures in the energy sector is of great economic importance for the world. The extension of the power generation life of hydroelectric power plants depends on logical decisions regarding the maintenance and renewal of the equipment. For this purpose, a Bayesian network (BN) has been applied to evaluate the failures in the hydraulic turbine to calculate the failure of the turbine. Forty-six nodes have been identified that will affect the operation of the system. Preventive measures have been established for failures with the highest posterior probability. By creating four different cases, failure probabilities and the change of the main fault have been calculated. How much savings could be made in each case is determined with the maintenance. This proposed framework will be guided in determining the maintenance strategies for hydroelectric power plant operators.
Konvolüsyonel Sinir Ağı Tabanlı Derin Öğrenme Modeli ile Narenciye Hastalıklarının Sınıflandırılması
Authors: ÇETİNER Halit , ÇETİNER İbrahim
Published: March 2022

Tarımsal üretimde mahsul verimi için bitki hastalıkları hayati öneme sahiptir. Bitkilerde bulunan renk, şekil, doku gibi özelliklerin birbirine benzemesinden dolayı bitkilerdeki hastalıkların erken aşamada tespiti zor ve yorucu olmaktadır. Bitkilerdeki hastalıkların erken aşamada tespit edilerek önlem alınması mahsule gelen zararın engellemesi için gerekli bir adımdır. Bu nedenle, narenciye ithalatını etkileyerek üreticileri maddi olarak büyük zararlara uğratan yaprak hastalıklarını sınıflandırmak için yapılan çalışma kapsamında derin öğrenme tabanlı bir model geliştirilmiştir. Buna ek olarak DenseNet121, MobileNetV2 ve ResNet50 mimari modellerini temel alan üç ayrı model ile de yaprak hastalıkları sınıflandırılmıştır. Bu modellerin oluşturulmasında ince ayarlı transfer öğrenme tekniği kullanılmıştır. Yapılan çalışma kapsamında önerilen 15 katmanlı CNN modeli ile Adamax optimizasyon yöntemi ile %99, RMSProp optimizasyon yöntemi ile de %97 doğruluk oranlarına ulaşılmıştır. En sık karşılaşılan narenciye yaprak hastalıklarından olan Blackspot (citrius siyah nokta (CBS)), canker (citrius bakteriyel kanseri (CBC)), greening (huanglongbing (HLB)) ile (sağlıklı) Health sınıflarında ise sırasıyla %100, %100, %98 ve %100 başarı oranlarına erişilmiştir.
Sürünme Test Cihazı Tasarımı ve İmalatı
Authors: KARABEY Ömer , AKKUŞ Ahmet
Published: March 2022

Bilindiği üzere malzemelerin mekanik davranışları sıcaklık ile değişiklik göstermektedir. Yüksek sıcaklıklarda ise bu davranış daha da önem kazanmaktadır. Yüksek sıcaklıkta, statik veya dinamik zorlamalar altında olan bir malzemenin mekanik davranışını sürünme testi ile belirlenebilmektedir. Sürünme testleri uzun ve maliyetlidir. Buradaki maliyet hem test cihazı hem de cihazın işletme maliyetidir. Maliyeti düşürmek için daha düşük bütçeler ile yapılabilecek bir test cihazı tasarlanmış ve imalatı yapılmıştır. Sürünme test cihazının konstrüksiyonu NPU65 profil ve 32mm çaplı miller üzerine kurulmuştur. Fırın kısmı ateş tuğlası ve refrakter tuğla ile yapılmıştır. Isıtıcı rezistanslar ise 22 awg Kanthal A1 teli ile sarılmıştır. Sıcaklık kontrolü ise REX C100 PID kontrolcüsü ve 70A solid state röle ile sağlanmıştır. Fırın maksimum 1000 °C de çalışmaktadır. Sürünme numunelerinin tutma çeneleri Inconel 718 süper alaşımından imal edilmiştir. Test numuneleri M12x1,75 sağ ve sol diş vida ile çenelere tutturulmuştur. Cihazda test numunesi maksimum 18 kN yük uygulanabilir. Numune boyundaki uzamalar ise 0,0001 mm hassasiyetli dijital komparatör ile zamana bağlı olarak kaydedilip sürünme grafiği oluşturulmaktadır.
Kilis Kentsel Sit Alanında Geleneksel Konut Kullanıcılarının Tercih ve Önceliklerinin Belirlenmesi
Authors: TAŞÇIOĞLU Saliha
Published: March 2022

Konut kullanıcılarının sosyal, ekonomik, kültürel önceliklerinin belirlenmesi, kendileri için uygun konutun belirlenmesi açısından oldukça önemlidir. Çünkü bireysel ihtiyaç ve öncelikler çerçevesinde belirlenen konut seçimi. kullanıcının memnuniyetini de arttırmaktadır. Günümüzde özellikle koruma alanlarındaki yerleşimcilerin bu alanları tercih sebepleri araştırılması gereken bir konudur. Çünkü bu alanlarda sürdürülebilir korumanın sağlanması önemlidir. Bu da kullanıcı profili ve farkındalığı ile ilgilidir. Özellikle son 10 yıllık dönemde Kilis Kentsel Sit alanındaki yerleşimci profili değişmektedir. Düşük kira bedeli, merkezi konum gibi farklı sebeplerle, Suriyeli sığınmacılar tarafından tercih edilmektedir. Yapılan araştırma sonunda alan içerisinde sürekli ikamet eden ve çalışma kapsamında görüşme yapılabilecek nitelikteki kullanıcı sayısının oldukça az olduğu görülmüştür. Çalışmada konut kullanıcılarının öncelik ve tercihlerinin belirlenmesi amacıyla mekânsal, sosyal, ekonomik ve kültürel faktörler ikili karşılaştırma yöntemi ile değerlendirilmiştir. Yüz yüze görüşme ile yürütülen çalışma sonunda katılımcıların en çok Mahalle kültürü ve güvenlik hissi cevabı verdikleri tespit edilmiştir
Düzeltme: Yanma Odası Elemanları Kaplanmış Bir Dizel Motorun Cr3C2 Kaplı Egzoz Borusu Üzerine Etkisi
Authors: ŞAP Serhat , HAZAR Hanbey , ŞAP Emine
Published: March 2022

BEÜ Fen Bilimleri Dergisinde yayınlanan (8 (1), 98-108, 2019) makalemizde sehven yapılan hatalardan dolayı düzeltmeler yapılması gerekmektedir. Yapılan düzeltmeler sayfa numarası belirtilerek yapılmıştır. Özet kısmı son cümlesi “ Bu çalışmada yanma odası elemanları kaplanmış bir dizel motorun, içi ve dışı krom karbür kaplı bir egzoz borusu üzerindeki etkisi araştırılmıştır” olarak değiştirilmiştir. Anahtar kelimeler kısmında “bor” kelimesi yerine “Plazma sprey kaplama” eklenmiştir.
Bir Apartmanın Yenilenebilir Enerji Sistem Maliyetinin HOMER Pro Kullanılarak Belirlenmesi
Authors: YALILI  KILIÇ Melike , ADALI Sümeyye
Published: March 2022

Dünya genelinde son yüzyılda yaşanan gelişmeler enerji kaynağı olarak fosil yakıtların yoğun olarak kullanılmasına neden olmuştur. Günümüzde yaşanan çevresel sorunların önemli bir nedenini teşkil eden fosil yakıtların yerine, tükenmez ve çevreye daha az zararlı olan yenilenebilir enerji kaynaklarının kullanımı, çevre ve insan refahının sağlıklı bir şekilde sürdürülmesi için önem arz etmektedir. Bu çalışmada, Bursa’nın merkez ilçelerinden biri olan Osmangazi’de yer alan üç katlı bir apartmanın elektrik ihtiyacının karşılanması amacıyla 2020 yılı elektrik tüketim verileri kullanılarak, HOMER Pro programında şebekeye bağlı fotovoltaik enerji sistem tasarımı gerçekleştirilmiştir. Ayrıca enerji sisteminin maliyet analizi gerçekleştirilmiş ve enerji maliyeti 0,562 TL/kWh, 25 yıllık proje ömrü için sistemin net şimdiki maliyeti 49405,97 TL (5974,12 $) olarak hesaplanmıştır.
Directional Energy Functionals Through Anholonomic Coordinates
Authors: DEMIRKOL Ridvan Cem
Published: March 2022

In this paper, a special case of directional energy functional is investigated by computing the directional energy and pseudoangle of unit vector fields in the ordinary three-dimensional space. This approach is also extended simultaneously to define the critical points of the directional energy functionals of the velocity fields. Then, the restriction of the harmonic maps and the extrema of the directional energy functionals is considered, Finally, we compute directional harmonic and biharmonic equations of the curvature vector fields to generalize total bending or energy of vector fields.
Haddeleme ile Birleştirilen AISI 430/Al 1050 /AISI 304 Tabakalı Kompozitlerde Isıl işlemin Ara Yüzey ve Mekanik Özelliklere Etkisi
Authors: DEMİRTAŞ Hüseyin , İNCESU Alper
Published: March 2022

Bu çalışmada, haddeleme işlemi ile AISI 304 östenitik paslanmaz çelik ve AISI 430 ferritik paslanmaz çelik sacları araya ticari saflıkta 1050 alüminyum levha konularak lamine kompozit üretilmiştir. Üretim sonrası farklı sıcaklık ve sürede ısıl işlem uygulanmış kompozit plakaların ara yüzey bağ mukavemeti, mikroyapısı ve mekanik özellikleri incelenmiştir. Kompozitlerin mekanik özellikleri çekme testi, mikro sertlik ölçümü, sıyırma testi ile belirlenmiş, taramalı elektron mikroskobu (SEM) ve enerji dağılımı spektroskopisi (EDS) ile karakterize edilmiştir. Uygulanan ısıl işlem parametreleri arasında yüksek mekanik özellik (434,95MPa) ve süneklik (%27,16) sağlaması yönünden ve işlem kolaylığı bakımından 450˚C-12 h uygun görülmüştür. 550˚C’de 12 h yapılan ısıl işlem sonrasında ise katmanlar arasındaki bağ kuvvetinin sıfıra yakın bir değere düştüğü belirlenmiştir.
Haberler Üzerinden Ülkeler Arası İlişkilerin Analizi
Authors: UZUN Alp Bintuğ , ÖZER Alperen , DİRİ Banu
Published: March 2022

Tarih boyunca insanların ve toplulukların birbirleri hakkındaki görüşleri farklı iletişim ortamlarıyla gözlenebilmektedir. Medyanın kuruluşundan itibaren bir görüşün veya amacın daha geniş bir kitleye yayılması kolaylaşmıştır. Medya, sadece aynı düşüncedeki insanların birbirinden haberdar olmasına değil, aynı zamanda farklı düşünen gruplardan da haberdar olmalarına yardımcı olmuştur. Bu durum göz önüne alındığında, medya tarafından yapılan haberler aracılığıyla, farklı toplulukların birbirleri ile olan etkileşimleri ve görüşleri incelenebilir. Bu çalışma kapsamında seçilen ülkelerin, birbirleri hakkında yaptıkları haberler ile ilişkilerinin nasıl bir seviyede olduğunun ölçülmesi sağlanmıştır. Yapılan analizin gerçeğe uygunluğu ise, kullanılacak haber veri setinin büyüklüğü ile doğrudan ilişkilidir. Analizlerin sonuçları, kullanıcının seçtiği ülkeler arasındaki ilişkiyi sözel, sayısal ve görsel olarak raporlamaktadır. Geliştirilen uygulama üç temel adımdan oluşmaktadır; Birinci adım ilgili haberlerden hangi cümlelerin çekileceğine ve hangi ülke ile ilgili olduğuna karar verilmesi, ikinci adım cümlelerin VADER yardımı ile duygu analizinin yapılması ve son adımda da yapılan analizin sonuçlarının etkileşimli ara yüz yardımı ile zengin bir içerikle kullanıcıya sunulmasıdır.
Comparison of different gastrostomy tubes materials resistance to the effects of damaging factors in vitro model experiment
Authors: Gavshchuk Maksim V. , Zorin Ivan M. , Vlasov Petr S. , Lisovskii Oleg V. , Gostimsky Alexander V. , Sarkisyan Zara M. , Zavyalova Anna N. , Kabanov Aleksandr V. , Kuznetsova Yulia V. , Karpatsky Igor V. , Lisitsa Ivan A.
Published: March 2022

Background. A variety of products made from different materials (natural latex, silicone, silicone-coated latex, polyvinyl chloride, polyurethane and other) are used as gastrostomy tubes. They have different resistance to damaging factors, different microbial landscape and timing of infection. The aim of investigation is to compare the resistance of various gastrostomy tubes materials to the effects of damaging factors in an in vitro model experiment.

Materials and methods. The experiment was performed with 2 latex urinary N 34 Pezzer catheters, 2 latex silicone-coated urinary 26 Fr Foley catheters, 2 polyurethane 18 Fr nasogastric tubes, 2 silicone 24 Fr branded gastrostomy tubes for percutaneous endoscopic bumper-type installation. All the tubes were cut on to 5 sections 50 mm long, weighed, marked at the ends and placed in a sealed vessels with 40 ml of water for 14 days at a temperature of 36C. After that, the tube fragments were wiped with filter paper, re-weighed and measured. Similar pieces of tubes 50 mm long were weighed and placed in a 0.1 M hydrochloric acid solution for 14 days at a temperature of 36C, followed by repeated measurements. After the experiment, the samples were washed with distilled water and dried at 70C for a day, followed by measurement.

Results. The change in the mass and linear dimensions of the polyurethane and silicone tubes were negligible (0.10.5%) after the influence of water and a solution of hydrochloric acid. Changes in latex and latex with silicone coating tubes were significant, the mass changed by 212% due to water absorption, the length by 13.5%. For latex materials, a decrease of 1% in mass was noted after drying. Decrease in linear dimensions of polyurethane materials was a result of exposure to elevated temperatures.

Conclusions. According to the results of the model experiment, silicone and polyurethane tubes showed the least absorption of liquids, changes in weight and length, which indicates their resistance to damaging factors in the experiment and allows us to recommend products made from these materials for gastrostomy. Latex catheters have demonstrated maximum fluid accumulation, weight and length changes, which makes their use in clinical practice impractical.
Experience of using a neuromonitor during thyroid surgery in children
Authors: Gostimsky Alexander V. , Romanchishen Anatoly F. , Peredereev Sergey S. , Vabalayte Kristina V.
Published: March 2022

Background. Thyroid surgery is associated with the risk of complications that worsen the course of the postoperative period and lead to disability of patients. One of these complications is damage to the recurrent laryngeal nerve, causing impaired phonation, and in the case of bilateral lesions, respiratory impairment.

The aim of this work was to study the features of the technique and the effectiveness of the use of neuromonitoring during operations on the thyroid gland.

Materials and methods. The study was conducted on a series of 55 clinical observations of thyroid diseases in children. Intraoperative monitoring was performed using the Inomed C2 Nerve Monitor, which records the action potential on the vocal folds caused by electrical stimulation of the recurrent laryngeal nerve.

Results. In 52 cases, no decrease in the amplitude of the neuromonitor signal was observed during surgical interventions. In two cases, intraoperatively, a decrease in the signal amplitude associated with excessive traction of the nerve was revealed. Another observation noted the absence of a signal at the end of the operation and the preservation of the mobility of the vocal cords in the postoperative period, probably due to technical errors in performing intraoperative monitoring. In one patient, during the operation, changes in the neuromonitor signal did not occur, but after surgery, a violation of the vocal function was noted, which fully recovered within 3 months. In all likelihood, these changes are due to the technique of tracheal intubation.

Conclusions. Neuromonitoring is an additional method for finding the recurrent laryngeal nerve, but in no way replaces the need for delicate anatomical identification of the latter.
Successful outcome of ivf and gestation in a patient with infertility with retrograde ejaculation of a partner
Authors: Krivolesova Tatyana A. , Ivanov Dmitry O. , Reznik Vitaly A. , Romanova Larisa A. , Guryanova Galina V. , Chernobrovkina Anna K. , Vetrov Vladimir V. , Kurdynko Ludmila V.
Published: March 2022

The report presents the results of successful treatment of a married couple. A patient with multiple somatic pathology (varicose veins of the lower extremities, cholelithiasis, chronic cholecystitis) had 2 normal births in her first marriage. In the second marriage (the husband of 62 years revealed hypogonadism, cryptozoospermia, retrograde ejaculation) in 2018, ICSI was performed, which ended in an undeveloped pregnancy with curettage of the uterine cavity, in 2019, with the 4th pregnancy (CryoET), cesarean section (CS) at 28th week of pregnancy for chronic placental insufficiency with severe blood flow disorders in the placenta, nonimmune fetal dropsy. The child died on the 7th day of life. In 2020, due to the failure of the postoperative scar on the uterus after cesarean section, laparoscopy, hysteroscopy, and metroplasty were performed. The real, 5th pregnancy occurred after IVF with her husbands sperm taken from post-ejaculatory urine. At 39th week of pregnancy, a planned Сaesarean section was performed, a boy was born at 3710 gr, 52 cm long with an Apgar score of 8/9 points. There was no bleeding during childbirth, the patients postoperative period was smooth. She was discharged home on the 5th day after delivery in a satisfactory condition with normal tests with a baby receiving breastfeeding.
Discourse acquisition along with the early and preschool age
Authors: Balčiūnienė Ingrida , Kornev Aleksandr N.
Published: March 2022

Numerous studies in language acquisition have been revealed that oral discourse plays a crucial role in cognitive development and communicative development and has an impact on the so-called narrative mind, social intelligence, autobiographic memory, and personal identity. The paper is devoted to the main patterns and mechanisms of the acquisition of oral personal discourse along with the early and preschool age. The paper includes the following sub-topics: conversation acquisition, personal narrative and fictional story acquisition, relations between different genres of personal discourse, and cognitive prerequisites for the acquisition of personal discourse. The paper is based on the meta-analysis of numerous studies covering various fields of science (psychology, psycholinguistics, sociolinguistics, and linguistics) and decades of scientific investigations in child development. The main issues discussed in the paper are acquisition and development of interaction structure (the skills necessary to initiate and to close a conversation); acquisition and development of conversation structure (the skills necessary for turn-taking and topic continuation); acquisition and development of some metadiscursive skills necessary for successful communication (e.g. to acknowledge communication breakdowns in a proper way); acquisition and development of some pragmatic skills necessary for successful communication (e.g. to modify speech characteristics according to the social role and status of the interlocutor and the context of the communication, to produce relevant speech acts); acquisition and development of narrative structure (story structure, episode completeness, internal state terms); and acquisition and development of narrative cohesion and coherence. The given issues are discussed from the perspective of the biological age and linguistic, communicative, and cognitive development.