bluuebunny/crossref_metadata_2025 huggingface dataset:
KUALITAS SISTEM INFORMASI, KUALITAS INFORMASI DAN PERCEIVED USEFULNESS TERHADAP KEPUASAN PENGGUNA AKHIR SOFTWARE ANALISIS KREDIT
Authors: Putra Rizky Herawan , Aprila Nila , Marietza Fenny , Hatta Madani
Published: November 2020

Influence of information system quality, information quality and perceived usefulness on end-user satisfaction credit analysis software aims is to prove the effect of information system quality on end-user satisfaction credit analysis software, to prove the effect of information quality on end user satisfaction credit analysis software, to prove the effect of perceived usefulness on end user satisfaction credit analysis software, and last to prove the effect of system quality, information quality and perceived usefulness together on end-user satisfaction credit analysis software at PT. Bank Rakyat Indonesia, Tbk Bengkulu Branch. The data analysis method used is multiple linear regression analysis. Hypothesis testing obtained results are the quality of the information system has been proven to affect the satisfaction of end users of credit analysis software at PT. Bank Rakyat Indonesia, Tbk Bengkulu Branch. This means that LAS applications can increase data processing capacity, have a high-security system, have good data correction facilities. The quality of information has been proven to affect the satisfaction of end users of credit analysis software at PT. Bank Rakyat Indonesia, Tbk Bengkulu Branch, meaning LAS software can increase user satisfaction because the credit analysis conducted can produce accurate, reliable, timely, and relevant data. And the last result is Perceived usefulness is proven to affect the satisfaction of end users of credit analysis software at PT. Bank Rakyat Indonesia, Tbk Bengkulu Branch, meaning that the LAS application is very helpful in completing the analysis quickly, the LAS application is able to increase work effectiveness and the LAS application makes it easier for employees to complete work so as to increase user satisfaction. Keywords: Information System Quality, System Quality, User Satisfaction
Arystoteles o możliwości bycia niesprawiedliwym wobec samego siebie
Authors: Smolak Maciej
Published: November 2020

Przedmiotem tego artykułu jest rozjaśnienie sensu aporii „czy można być niesprawiedliwym wobec samego siebie?”, którą Arystoteles rozważa w EN V, oraz wykazanie, że możliwe jest dobrowolne traktowanie niesprawiedliwie samego siebie.  Na uwagę zasługują szczególnie dwa miejsca V 9, czyli  ustępy 1136a31-1136b1 oraz 1136b13-25. W pierwszym ustępie Arystoteles wysuwa hipotezę, że akratyk może dobrowolnie traktować niesprawiedliwie samego siebie. W drugim przedstawia dwa argumenty - „z pozornej straty” oraz „z życzenia” - które mają za zadanie udowodnienie, że nikt nie może traktować niesprawiedliwie samego siebie. Argumenty te nie unieważniają hipotezy wysuniętej w pierwszym ustępie ani nie wykluczają możliwości dobrowolnego traktowania niesprawiedliwie samego siebie.
Influence of age at complementary food introduction on the development of asthma and atopic dermatitis in Korean children aged 1–3 years
Authors: Lee Jihyun , Shin Meeyong , Lee Bora
Published: November 2020

Background: Complementary food in infancy is necessary for human growth, neurodevelopment, and health. However, the role of allergen consumption in early infancy and its effects on the development of food allergy or tolerance remain unclear.Purpose: To investigate the influence of age at the time of complementary food introduction on the development of asthma and atopic dermatitis in Korean children aged 1–3 years.Methods: We combined data from the Korea National Health and Nutrition Examination Survey collected from 2010 to 2014 and analyzed 1619 children aged 1–3 years who were included in the survey. Multivariate regression analysis was used to identify associations among type of feeding, age at the time of complementary food introduction, and doctor-diagnosed atopic dermatitis and asthma.Results: Age at the time of complementary food introduction was not significantly associated with doctor-diagnosed atopic dermatitis and asthma in children aged 1–3 years. In the univariate analysis, children with asthma showed higher water and sodium intake levels than nonasthmatic children. However, this relationship was not significant in the multivariate regression analysis.Conclusion: The present study revealed no statistically significant relationship between age at the time of complementary food introduction and the risk of atopic dermatitis and asthma in young Korean children. A national prospective study is needed to clarify the influence of age at the time of complementary food introduction on the development of allergic diseases.
GENDER COMPARISON OF BODY HEIGHT CHARACTERISTICS IN ALBANIAN CHILDREN AGED 6.5-15.5 YEARS OLD
Authors: Jarani Juel , Spahi Andi , Ushtelenca Keida
Published: November 2020

Growth is a multifaceted process, where development in body size leads to morphological and functional changes. The aim of this scientific paper is to create a references database on the current status on body height of Albanian children (6.5-15.5 years old) and to compare the current status of body height by gender.
The study aimed at recruiting a large sample of Albanian children. The sample was between 6.3 and 15.7 years old and originated from 23 schools in Albania (n = 10585). Body height was measured using a digital stadiometer/scale (Health O Meter Professional 500KL, Health O Meter Products Inc., Bedford Heights, OH, USA). Height was measures to the nearest 0.1 cm. The results of this study show that the comparison between boys and girls presents significant changes (p ≤ 0.05 ٭) for these age groups; boys taller than girls aged 7, 8, 8.5, 9; girls taller than boys aged 11.5- 12.5 years while boys taller than girls aged 13.5- 15.5 years, Comparison data by gender showed that boys have the highest value of the difference in the average increase in body height at the age of 15.5 years with a value of 10.5 cm (p ≤ 0.05 ٭) compared to girls while girls have the highest value of the difference in the increase in the average body height in age 11.5 years with a value of 2.6 cm (p ≤ 0.05 ٭) compared to boys.
STUDENTS' NEEDS IN ENGLISH TEACHING MATERIALS FOR KINDERGARTEN STUDENTS
Authors: Inawati Iin , Suherdi Didi , Purnawarman Pupung
Published: November 2020

The aim of this study was to investigate the students actual foreign language needs (Masuhara, 1998: 239-260) , namely : first,Â  personal needs which focus on their personal information and second, learning needs covers five points, to be exact: learning attitude, learning preferences regarding activities, teaching media and topics in the EFL classroom, the gap between the target level and the present level of proficiency. A descriptive survey research design was used in this study. A set of smiley questionnaire were collected from for 113 kindergarteners from six kindergartens in Pringsewu District, Lampung Province, Indonesia. Furthermore, interviews with six homeroom teachers and six principals were conducted to get deeper data. The results show that the students are members of various tribe, included in the low to middle socioe-conomic class, the number of students surveyed is more female than male (62 female and 51 male) aged 6-7 years old. They have positive attitude toward EFL class, and they prefered learning English using games to other activities . Animals, numbers and foods were the students favorite topics. Furthermore, from four kinds of oral competencies they were able to naming objects.Â
STUDENTS’ PERCEPTION TOWARD THE ENACTMENT OF METACOGNITIVE INSTRUCTION IN AN EFL WRITING CLASS: LESSON LEARNED FROM A PRIVATE UNIVERSITY IN INDONESIA
Authors: Fiani Ani
Published: November 2020

Metacognition plays an important role in developing EFL students to become successful learners who are able to plan their learning goals, monitor their learning progress, and evaluate their learning outcomes in the disruption era. Because of the crucial role of metacognition in language learning, the implementation of metacognitive instruction in an EFL writing class had been investigated during one semester. Thus, this article discussed the students’ responses towards the use of the teaching program. This research study conducted with thirty three students in a private university in Lubuklinggau used a case study by collecting data through a questionnaire and reflective journals. The research results revealed that most of the EFL students had highly positive responses towards the implementation of metacognitive instruction in an EFL writing class including three aspects, namely the learning materials, learning activities, and benefits of the learning processes. Therefore, the teaching program had encouraged and benefited to the students in learning to write.  Metacognitive instruction, as an alternative of effective methods, should be considered by teachers to help their students to become more independent learners.Keywords: Metacognition, metacognitive instruction, writing
“I FORGOT WHAT IT IS”: THE ENACTMENT OF 2013 CURRICULUM IN EFL CLASSROOM
Authors: Misbah Susmalinda , Waluyo Untung , Khotimah Khusnul
Published: November 2020

To date, the 2013 curriculum has been implemented for almost a decade. But this latest curriculum has not been well-implemented due to many obstacles. Accordingly, plethora studies have been extensively carried out to refine the praxis. However, the investigation of this area in junior high schools is underexplored. Thus, this study was carried out to fill this void. This research study aimed to investigate the problems in enacting 2013 Curriculum, to reveal the hindering factors, and to showcase how teachers cope with those problems. Grounded in a case study, nine English teachers of state junior high schools were recruited. Data were collected through observations, documentations, and interviews. The findings confirmed that teachers experienced some delinquent setback in translating curriculum into instruction. This was related to how they teach using suggested teaching stages, integrate intended domains of competence, and conduct authentic assessment. Furthermore, students’ lack of motivation and autonomy was also a sizeable impediment. In relation to this, some hindering factors and teachers’ endeavours to cope with the abovementioned problems were also elaborated systematically. To end this article, some practical recommendations were proposed accordingly.
Epistemology Naturalized: Quine's Intervention in the Debate Concerning the Problem of Knowledge
Authors: Sasa Michael Sunday
Published: November 2020

The present paper attempts critical navigation of what could be referred to as the Quinean Intervention in the debate concerning the problem of knowledge. This problem easily represents the central concern of traditional epistemology, particularly since the modern period. Its retrospective statement finds expression in the ancient definition of knowledge as justified true belief (JTB). Among the problems easily identified with the traditional conception of knowledge is the problem of exhaustive or conclusive justification, which is to form the base of the structure of knowledge. Philosophers across the spectrum of discourse have risen to respond to the problem. Prominent among the position is foundationalism and coherentism as theories of justification. However, these theoretical representations are never able to proffer conclusive justification condition; and so, the traditional problem of epistemology has remained largely unresolved. Several alternatives have therefore been proffered by philosophers across the board. One of such is the project to naturalize epistemology – a programme famously identified with W.V.O. Quine. The paper examines Quine's position to move epistemology from philosophy to psychology. This project, the paper argues, stripped epistemology of its normative status, and therefore cannot be regarded as a philosophical proposal, as philosophy is essentially prescriptive not descriptive, matters of ought not matters of is or matters of values not matters of fact. For this reason, the paper rejects the Quinean project, describing it as a non-epistemic response to an epistemological problem. The paper employs the philosophical method of analysis, clarification and criticism, combining this with the method of reconstruction and clarity.
A Philosophical Reflection on the Nature and Relevance of Azikiwe’s Political Ideology of Neo-Welfarism
Authors: Haaga Paul T , Sasa Michael Sunday
Published: November 2020

This paper attempts a reflection on the nature and relevance of Azikiwe’s Political philosophy of Neo-Welfarism. Neo-welfarism as a political ideology was advanced by Azikiwe as his contribution to the search for ideology in the aftermath of colonialism. With Neo-Welfarism, Azikiwe sought to advance a philosophy for colonial emancipation and the decolonization of Africa. At the background of this ideology is his dissatisfaction with the dominant ideologies of the era being capitalism, socialism and welfarism. This dissatisfaction triggered an attempt to formulate a via media that takes into cognizance, the 'good' aspects of these ideologies through the method of eclectic pragmatism for the greatest good of the greatest number. This paper found out that one of the main objectives of Neo-welfarism is to build a system that works to the advantage of many rather than one that speculates and works to the disadvantages of many. This paper also found out that Neo-welfarism as a political ideology is not without flaws; this is because the workability of such a via media has been called to question among other issues that are at the kernel of this ideology. The conclusion that is however reached in this paper is in two folds: one, the articulation of neo-welfarism at the time when there was an apparent search for ideology for the decolonization of Africa is both timely and laudable. Two, the non-implementation of neo-welfarism after several decades of its advancement notwithstanding, it is yet relevant in the sustained need to deepen democracy and search for an operational ideology for African's development even today.
An Analysis of Alvin Goldman’s Naturalized Epistemology
Authors: Uzoigwe Elias Ifeanyi E.
Published: November 2020

This work, “An Analysis of Alvin Goldman’s Naturalistic Epistemology,” aims at presenting the contributions of Alvin Goldman in am epistemic bent. As a branch of philosophy, epistemology has significantly advanced right from the classic, medieval, modern, and contemporary epochs. The effects of postmodernist thinkers’ radical approach to philosophy are evident in almost all philosophy branches. With the notion of doing epistemology through science championed by W.V.O. Quine, Alvin Goldman, John Kuhn, and some other scholars have raised objections and counter objections to such a deconstructionist mindset within the epistemic circle. Expectedly, these naturalistic epistemologists had discontinuity with one another in their positions. Goldman is concerned with such traditional epistemological problems as developing an adequate theoretical understanding of knowledge and justified believing. This paper shows that in his naturalistic discontinuity with Quine, Alvin Goldman did not conceive epistemology as part of science the same way Quine conceived it. Goldman’s view that answering traditional epistemological questions requires both a priori philosophy and the application of scientific results. Goldman’s naturalism is the view that epistemology “needs help” from science. His primary concern is in the area of traditional epistemological problems, including developing an adequate theoretical understanding of knowledge and justified believing. In this paper, I see Goldman’s divergence in the opinion of his naturalistic epistemology with Quine and other naturalistic epistemologists not as a problem but indeed part of epistemic consolidation. In the course of this work, analytic, evaluation, library research, and descriptive methods as well as internet materials, were employed.
Globalization: An Inexorable Phenomenal Force
Authors: Uzomah Michael , Folorunso Paul Olorunsola
Published: November 2020

Globalization is a wide-ranging universal influence on humanity’s existence, experience, and intercourse, as it is tending towards reducing the world into a singularized society. In the presence of this omnipresent phenomenon, the physical barriers between nations are illusive because communicative technologies which are the driving force of globalization know no physical barriers. It enables trans-border interactions in whatever aspect of the lives of nations possible in real time. The questions that are often raised when discourse on globalization feature at the local and international scene are: what is the nature and essence of globalization? Is the phenomenon of globalization establishing symbiotic political and economic relationships between nations? Or is the globalization a neocolonialism and western imperialism and hegemony? Is globalization not creating a new form of imbalanced dependencies between “the haves and the have not”? There are two contrary views regarding the significance of globalization to nation-states. The first view regards globalization as positive and ultimate, while the second perceives it as bad and in need of reformation. Another question that also features prominently in discourse on globalization is, is it possible for a country to refuse to join the bandwagon of globalization? In response to this question, the paper maintains that an integrated understanding of globalization is an inexorable unifying phenomenon and mega shift-powered innovative digital technology that is continually plummeting the world’s landscape into a micro-space. This inexorable unifying phenomenon inevitably makes the experience and concern of a people and geographical space the general experience and concern of all people and geographical spaces in no time. The paper concludes that countries' prosperity in the global arena lies with how much they can forcibly assert themselves into the global scene either as giants or as paupers or beggars or complainants. Hence, it recommends that certain countries who are on the negative side of complaining about globalization must realize the competitive and capitalist nature of globalization and take positive advantage of the opportunity. The paper adopts the expository analytic method.
The Effect of Pandemic on Homebased Tourism: Post Covid-19
Authors: Umukoro Gloria Mayen , Odey Veronica Ebi , Yta Edisua Merab
Published: November 2020

The present study explores the effect of a pandemic on home-based tourism and tourists' decision to appreciate and patronize local indigenous sites, theater, and other tourism activities. An increase in the global spread of COVID-19 pandemic and incessant rise in deaths especially in renowned destinations, travel restrictions and subsequent closure of international tourist sites; have pulled Nigerian tourists’ motivation away from international destinations. A survey of 250 frequent Nigerian travelers reported their cultural experiences before and during the pandemic and their decision to patronize Homebased tourist-oriented activities. Major reasons for the push from international destinations by respondents were fear of COVID-19 infection, fear of death and stigmatization. Major reasons for pull were the low rate of spread, low deaths, and local traditional remedies availability. While the former were major push factors identified, the latter were perceived as pull factors. However, respondents never considered facilities, weather, and airfares. Thus, this research significantly models local indigenous tourist sites' projection and cultural activities as tools for revitalizing home-based tourism in the post COVID – 19 era. It calls on government, tourism industry and private firms to turn attention towards the revitalization of local indigenous tourist sites and cultural activities to attract tourists to enhance sustainable home-based tourism development.
Investigation Of Corrosion Behavior On Plastic Mold Steel
Authors: Öztürk Kübra , Uyulgan Bahadır , Erdem Eda , Saf Orçun
Published: November 2020

Günümüzde, endüstride kullanılan plastik kalıp çeliklerinde yaşanan en büyük problemlerden biri korozyon sorunudur. Bu çalışmada dört farklı plastik kalıp çeliği numunesine (A1, A2, A3, A4) sertlik ve korozyon testleri uygulanmıştır. Sertlik testleri, sertlik-işlenebilirlik ve sertlik-korozyon direnci olarak incelenmiş olup, dört farklı numune arasından en iyi özelliklere sahip takım çeliği önerilmiştir. Sertlik-işlenebilirlik özelliklerine göre en iyi numune 31 HRC değeri ile A2 numunesidir. Korozyon deneyleri %3.5 NaCl çözeltileri içinde gerçekleştirilmiştir. Her numunenin korozyon oranı, Tafel Ekstrapolasyon yöntemi ile hesaplanmıştır. Sertlik-korozyon direnci değerleri karşılaştırıldığında, 0.237 µm değeri ile A2 numunesi diğer numuneler arasında en yüksek korozyon direnci değerine sahiptir. Bu deneyler sonucunda, A2 numunesinin dört farklı plastik kalıp çeliği numune arasından bu özelliklere göre seçilmesi en uygun numune olduğu belirlenmiştir.
Plasma Electrolytic Oxidation of Niobium Aluminide
Authors: Elkoca Candan Şen
Published: November 2020

Yüksek sürünme dirençleri ve düşük yoğunluklarıyla şu an kullanılmakta olan Ni-bazlı süperalaşımlardan daha üstün özellikler sergileyen intermetalik bileşikler, tercih edilen yüksek sıcaklık malzemeleri olmaya başlamıştır. Bu çalışmada, öncelikle kutu sementasyon yöntemiyle saf Nb metali üzerinde bir NbAl3 intermetaliği oluşturulmuştur. Ardından, PEO ile NbAl3 intermetaliği üzerinde oluşturulan seramik kaplama ile NbAl3 tabakasının oksidasyon direnci geliştirilmeye çalışılmıştır. Sementasyon tabakasının anodik oksidasyonu sırasında yüzeyde oluşan olası amorf ya da farklı kristal yapılardaki Al2O3 fazları daha sonra 1000 oC’de 2 saat argon gazı altında tavlanarak oksidasyona dayanıklı ?-Al2O3 fazına çevrilmiştir.Uygulamaların performansını karşılaştırmak için tüm numuneler 4 saat süre ile 800, 900, 1000 ve 1100 oC’de 4 saat süre ile havada oksitlenmiştir.
The Application of Taguchi Experimental Design Methodology to the Removal of Coil Break Defect
Authors: Elkoca Candan Şen
Published: November 2020

Sıcak haddelenmiş düşük karbonlu çelik rulolar boya kesme hatlarında açılırken bazı rulolarda istenmeyen “rulo kırığı” kusuruyla karşılaşılabilmektedir. Bu tür bir kusur özellikle dış görünümün önemli olduğu uygulamalarda istenmemektedir. Rulo kırığı kusurun giderilmesi için, rulo açma işlemi sırasında çelik sac üzerine uygulanacak işlem parametrelerinin tespit edilmesi çok fazla deney yapılmasını gerektirmektedir. Taguchi deney tasarımı uygulaması, mevcut ve kontrol edilebilir faktörleri göz önüne alarak deney sayısında yarattığı azalma ile etkin ve verimli bir araç olarak karşımıza çıkmaktadır. Uygulama sonuçları analiz edildiğinde, çelik şeridin sıcak haddehanedeki sarılma sıcaklığı ve sıcak haddelenmiş rulonun açılma hızının istatiksel olarak önemli olduğunu ortaya çıkmaktadır. Buradaki problem bir maksimizasyon (rulo kırıklarının sığlaştırılıp sıklaştırılması, yani kırık adedinin arttırılması) problemi olarak ele alındığında, sarılma sıcaklığının belirlenen alt düzeye düşürülmesi ve rulo açma hızının belirlenen üst düzeye çıkarılmasının istenilen sonucu verdiği görülmüştür.
Reaktif Red 195 Boyarmaddesinin Sulu Çözeltilerden Çelik Elektrot Kullanılarak Elektrokoagülasyon ve Elektrokoagülasyon/Adsorpsiyon Prosesi ile Giderimi
Authors: Gündüz Zürriye , Günay Ahmet , Özçelik Fadime Songül
Published: November 2020

Bu çalışmada çelik elektrotlar kullanılarak elektrokoagülasyon ve elektrokoagülasyon/adsorpsiyon hibrit prosesi ile Reaktif Red 195 (RR195) boyarmaddesinin sulu çözeltilerden giderimi amaçlanmıştır. Elektrokoagülasyon prosesi için yapılan çalışmalar sonucu belirlenen işletme parametrelerinde (başlangıç boyarmadde derişimi 50 mg/L, akım yoğunluğu 20 mA/cm2, reaksiyon süresi 5 dakika ve boyanın doğal pH değeri olan pH 5.5) renk giderim verimi %99,04 elde edilmiştir. Elektrokoagülasyon/adsorpsiyon için yapılan deneysel çalışmalar sonunda ise boyarmadde derişimi 50 mg/L, pH 5.5 ve adsorbent dozajı 1 g/L olarak belirlenmiştir. 3 dakika muamele sonunda elektrokoagülasyon ile %97.66 verim elde edilirken elektrokoagülasyon/adsorpsiyon prosesinde kaolinit, sepiyolit, üleksit ve kolemanit için sırası ile %99.25, %98.83, %98.61 ve %98.8 verim elde edilmiştir. RR195 boyarmaddesinin gideriminde çelik elektrodun kullanıldığı geleneksel elektrokoagülasyon yönteminin oldukça etkili olduğu; elektrokoagülasyon/adsorpsiyon hibrit prosesi için ise pH’ın önemli bir parametre olduğu sonucuna ulaşılmıştır.
Validation of a Radial Compressor CFD Analysis
Authors: Ak Süleyman Emre , Çadırcı Sertaç
Published: November 2020

In this study, a radial compressor flow at a high speed is investigated by Computational Fluid Dynamics (CFD) methods. The radial compressor of interest consists of a rotor, diffuser, and exit guide vanes and has an operational rotational speed of 21789 rpm. The geometry of the compressor and its test results such as compression ratio and adiabatic efficiency are available in literature. After extensive mesh convergence tests, steady-state CFD analysis has been performed for compressible and turbulent flow using the ideal gas approach. The main motivation of the study is the determine the appropriate CFD approach and boundary conditions of the problem that will fit best to the measurements. The CFD analysis revealed that the maximum relative errors for the adiabatic efficiency and the pressure ratio were 3.6 % and 1.3 %, respectively.
Evaluation of machinability of alloy ductile iron in term of thrust drilling force
Authors: Tanabi Hamed
Published: November 2020

The main aim of this work is the assessment of the machinability of alloyed ductile iron before the austempering process. 16MnCr5 alloy steel and alloyed ductile specimens were subjected to drilling tests. The effect of drilling parameters on cutting force was investigated based on the Taguchi approach. Based on the results, a regression model was established to predict thrust force at various drilling conditions. The predicted thrust forces ratio was then used to evaluate the machinability of alloyed ductile respect to the 16MnCr5 alloy steel. The results showed that at lower feed rate, the normal drilling force is very close for both materials, such that the estimated machinability rating is 86%.
Elektrikli Araçlardaki EMC Problemlerinin Analizi
Authors: Güler Sunay , Yenikaya Sibel , Yılmaz Güneş
Published: November 2020

Karbondioksit emisyonunu kısıtlayıcı yeni regülasyonlardan dolayı elektrikli araçlara olan talep gittikçe artmaktadır. Elektromanyetik uyumluluk (Electromagnetic Compatibility-EMC), yüksek gerilimli batarya ünitesi ve elektrikli tahrik sistemi bileşenlerinin konvansiyonel araç mimarisine entegrasyonu nedeniyle tasarım aşamasında değerlendirilmesi gereken en kritik konulardan biri haline gelmiştir. Bu çalışmada, otomotivde EMC standartlarından ve elektrikli araçlarda sıklıkla karşılaşılan EMC problemlerinden bahsedilmiştir.
Ultraviyole Dezenfeksiyon Yöntemi İle Numerik Pad Dezenfeksiyon Uygulaması
Authors: Yildiz Muhammed , Gürevin Bilal , Gültürk Furkan , Kamanlı Ali Furkan , Kulak Tansel Cavit , Yılmaz Fatih Mehmet
Published: November 2020

Bu çalışmada UV-C led ile dezanfektan işleminin bakteri popülasyonundaki üremeyi nasıl etkilediği üzerine bir inceleme yapılmıştır. Bu amaçla özellikle banka ve fabrika gişelerinde sıklıkla kullanılan numerik padler üzerinde UV-C uygulamasının yapılabilmesi için bir prototip geliştirilmiştir. Bu prototip kullanılarak yüzey üzerine belli sürelerde UV-C uygulaması yapılmıştır. Her bir işlem sonunda tek kullanımlık steril çöpler yardımı ile yüzeyden örnekler alınarak kanlı agar besiyerinde sürüntü testi yapılmıştır. Petri kaplarında bir haftalık süreç sonunda oluşan bakteri popülasyonları Pycharm programında Python programlama dili kullanılarak görüntü işleme teknikleri ile ölçülmüştür. Çıkan sonuçlara göre UV-C Ledin uygulanma süresinin bakteri popülasyonundaki artışı nasıl etkilediği incelenmiştir.
Verification of Patent Solution Proposed for Munition Release Systems Using TRIZ-Based Root Conflict Analysis (RCA+) Approach
Authors: Hatipoğlu Ayşenur , Subran Mert , Korkmaz Faik Fatih
Published: November 2020

Innovation is widely defined as transforming an idea into a new or improved method for the production of goods or services that can be sold. Many different problem-solving techniques have been developed for achieving innovative outcomes. One of these methods, which was introduced by Russian patent expert Genrich Altshuller in the 1940s, is called TRIZ. This methodology gives us a new perspective for developing solutions by formulating a problem in terms of technical and physical contradictions. It aims to evolve the systems to be more ideal by incorporating innovations. From the invention of TRIZ approach, several new tools have been developed to facilitate problem solutions. Root Conflict Analysis (RCA+) is one of the TRIZ tools, which helps extensively in analysing root contradictions of a problem. In this article, verification of patent solution proposed for munition release systems using TRIZ-Based RCA+ approach will be presented.
On-Line Spot Welding Quality Prediction with Analysis of Welding Parameters
Authors: Cantez Emin , Atalay İsmail , İsen Oğuz Alper , Aydın Serkan
Published: November 2020

Spot welding is one of the metal joining technologies and has an important place especially in the automotive industry. A passenger car has average 5000 spots. Destructive inspection is carried out at certain periods to check these spots. However, not all parts can be checked. In this work, welding parameters were collected and analyzed. By applying different machine learning methods, the quality of the spot welding was tried to be estimated and the results were compared.
FBG Sensörlerin Yüzey Uygulamalarında Kullanılan Sabitleme Elemanlarının İncelenmesi ve Özgün Bir Tasarımın Geliştirilmesi
Authors: Eğin Hande , Ünal Zafer , Günaydın Ahmet Can
Published: November 2020

Fiber Bragg Izgara (Fiber Bragg Grating (FBG)) sensörler küçük olması, hafif olması, yüksek hassasiyete sahip olması ve elektromanyetik girişimlerden etkilenmemesi gibi avantajları nedeniyle son yıllarda yoğun olarak kullanılmaya ve geliştirilmeye devam etmektedir. Doğrudan gerinim ve sıcaklık; dolaylı olarak ise basınç, yer değiştirme, titreşim ve ivme gibi fiziksel parametreler ölçülebilmektedir. Gerinim ve sıcaklık parametrelerini elde etmek için FBG sensörlerin ölçüm yapılacak malzemeyle bağlantı kurulması gerekmektedir. Bu bağlantı genel olarak iki yöntem kullanılarak sağlanmaktadır. Bunlardan ilki yüzeye sabitlenmesi diğeri ise malzemeye gömülmesidir. Yüzeye sabitleme metotlarından bir tanesi sabitleyici eleman kullanmaktır. Sabitleyici eleman; sensörün kolay montaj edilmesi, dış ortamlardan korunması ve hassasiyetinin artması gibi avantajlar sağlamaktadır. Bu bildiride, farklı FBG sensör sabitleyici elemanlarının ölçüm hassasiyeti, sabitleyici boyutu, malzeme türü, sabitleme yöntemi incelenmiş ve karşılaştırılmıştır. Yeni bir sabitleme elemanının tasarımı yapılmış ve sonlu elemanlar yöntemiyle doğrulanmıştır.
Recycling of pomegranate peel and mandarin peel with ultrasound assisted solvent extraction
Authors: Hüseyinbaş Merve , Korkmaz Berkay , Yücelen Selin , Güvenç Afife
Published: November 2020

According to the data of Food and Agriculture Organization, approximately one third of the food produced in the world (1.6 billion tons/year) is lost when it is not reused at the end of consumption. For the recovery and reuse of valuable ingredients (flavonoids, anthocyanins, phenolic acids) in ‘Katırbaşı’ pomegranate peel and ‘Satsuma’ type mandarin peel, which are food industry wastes, ultrasound assisted extraction method (UAEM) which is green technology was used. The effects of various solvents and particle size on extraction yield were investigated by applying solvent / solid ratio of 5 ml/g , particle size of 0.5-1 mm pomegranate peels and 10 min. extraction time for UAEM. The highest efficiency was achieved by using water with 18%. Total phenolic content (TPC) values are 16.55 mg GAE/g dry peel(dp), 14.4 mg GAE/g dp, 12.55 mg GAE/g dp, 10.9 mg GAE/g dp, 14.45 mg GAE/g dp for distilled water, methanol, 50% methanol-water, ethanol, 70% ethanol-water solvents, respectively, for 0.5-1 mm particle size. TPC was found as 11.75 mg GAE/g dp for particle size of 0.25mm and below and 17.5 mg GAE/g dp for the range of particle size of 1-2 mm using water. Also, similar experiments were made for mandarin peels; TPC and AA (Antioxidant Activity, with DPPH) were determined. The parameters were chosen as different solvent type (water, 100% ethanol, 80% ethanol-water, 100% methanol, 80% methanol-water), extraction time (10 and 20 min.) and solvent/solid ratio (10, 20 ml/g) as well. TPC and AA were found 17.8 mg GAE/g dp and 90% for 100% methanol, 10 minutes and 20 ml/g solvent/solid ratio, respectively. When the ultrasound application time was 20 min, TPC and AA were found 18.24 mg GAE/g dp and 90% for 20 ml/g solvent/solid ratio and 80% methanol, respectively. The highest extraction yield was 19% using distilled water for 20 min, 10 ml/g solvent/solid ratio.
Kompozit Malzemelerin Delinmesinde Matkap Nokta Açısının ve ÇCKNT'lerin Etkisi
Authors: Ceritbinmez Ferhat , Yapıcı Ahmet
Published: November 2020

Endüstride malzemelerin cıvata, perçin ve pim bağlantıları ile montajlanması veya üzerlerine delikler oluşturmak için matkap ile delme yöntemi kullanılmaktadır. Kompozit malzemelerin delinmesi esnasında çapaklanma, delaminasyon ve malzeme yarılması görülmektedir. İşleme parametreleri, delinen malzemenin mekanik özellikleri ve matkap nokta açısı delik kalitesini etkileyen en önemli faktörlerdir. Bu çalışmada cam elyaf takviyeli polimer (CETP) kompozit plakalara nano boyutta katkı maddesi eklenmesinin mekanik özelliklerine ve matkap yöntemi ile delinmesine etkisi araştırılmıştır. Tabakalı cam elyaf kompozit malzemelere nano partikül ilavesinin malzemenin dayanımında etkili bir rol oynadığı ve delik kalitesine etki ettiği görülmüştür. Sabit fener mili devri değerleri kullanılarak yapılan delme işlemlerinde; tezgah ilerlemesi arttıkça çapaklanmanın arttığı, matkap nokta açısının artması ile delik çapının arttığı tespit edildi. 90° ve 140° açılı matkaplar kullanılarak delinen deliklerin çıkış kısımlarında epoksi tabakasının blok şeklinde cam elyaf tabakasından ayrıldığı görüldü.
Basınçlı Polimer Kompozitlerde Reçine Oranının Mekanik Özelliklere Etkisi
Authors: Bingol Mahmut , Cavdar Kadir
Published: November 2020

Mekanik dayanımın istendiği yerlerde termoset esaslı elyaf takviyeli kompozitler tercih edilmektedir. Kısa çevrim süresi, yüksek mekanik özellikler sağladığı için bir çok alanda SMC kompozit yöntemi yaygın olarak kullanılmaktadır. Bu yöntem ile belli bir formülasyona göre hazırlanan ve pestil olarak isimlendirilen malzemeler olgunlaştırılmak için bir süre bekletildikten sonra basınç ve sıcaklık altında kalıplar içinde istenen şekilde parçalar üretilebilmektedir. Mekanik özellikleri belirleyen en önemli malzeme kullanılan elyafın oranıdır. Bunun dışında kullanılan förmülasyon da önem arz etmektedir.Bu çalışmada doymamış polyester oranı değiştirilerek üretilen deney plakaları standart ölçülere göre elmas testerede kesilerek çekme ve eğilme deneyleri yapılmıştır. Daha önce yapılan standart formülasyona göre mekanik özelliklerde oluşan değişim incelenmiştir.
Investigation of Mechanical Properties of Overlap Joint Form in CMT-Brazed Joints of DP800 Thin Zinc Coated Steel Plates Using Different Torch Feed Rates
Authors: Acar İbrahim , Yakupoğlu Cihan , Varol Faruk , Ferik Erman , Aslanlar Salim
Published: November 2020

Bu çalışmada,1 mm kalınlığındaki DP800 (Çift Fazlı) çelik plakalar bakır esaslı (CuAl8) ilave tel kullanılarak CMT-lehimleme (Soğuk Metal Transferi) tekniği ile birleştirilmiştir. Numuneler bindirme birleştirme formunda hazırlanmıştır. CMT-lehimleme işlemi, torç ilerleme hızları 21, 24, 27, 34 ve 39 cm/dk olmak üzere 5 farklı değerde yapılmıştır. Dolgu metali olarak büyük oranda bakırdan oluşan CuAl8 teli kullanılmıştır. CMT-lehimleme işlemi gerçekleştirildikten sonra; numunelerin gerilme özellikleri saptanmış ve DP800 çelik sacının CMT-lehimleme tekniği ile birleştirilebilirliğini görmek için birleşme noktalarının mikro ve makro görüntüleri incelenmiştir.
In vitro 3D Spheroid Culture Developed on the Parafilm Surface Using HEK-293 Cells
Authors: Eroğlu Erdal
Published: November 2020

Preclinical research to predict the effects of drugs and chemicals on humans is commonly carried out either by cell culture studies in vitro condition or on animals in vivo condition. While drug studies tested on cells cultured as a monolayer in plastic flasks are incompatible with realistic results, falsifying findings can also be achieved from in vivo studies performed on different species. In recent years, research on drug tests using spheroid cultures formed by growing cells in three-dimensional (3D) in vitro has attracted great interest. 3D spheroid structures are formed by growing the cells in a drop suspended on superhydrophobic surfaces. In this study, HEK-293 cells were investigated on parafilm surfaces displaying superhydrophobic properties by growing in 2 µl volume using hanging drop culture method in terms of spheroid formation. Light microscopy images from spheroid structures were taken on different incubation days and the area of spheroids was measured using the ImageJ program. Our study holds important findings for a chip platform that can be developed for use in vitro drug tests.
Investigation of the in vitro Anticancer Activity of Sorbus aria Extract on Prostate Cancer
Authors: Özar Tilbe , Özalp M. Fatih , Eroğlu Erdal
Published: November 2020

Cancer is one of the common diseases observed in our country and worldwide with a high mortality rate. Although cancer has been treated with different applications such as chemotherapy, radiotherapy and surgical operation, the exact remedy of this disease has still not been found, yet. The fact that current treatment methods have severe side effects on patients has increased the interest in natural anticancer agents that are accepted easily and considered as safer by society. The aim of this study is to investigate the anticancer activity of whitebeam (Sorbus aria) that grows in the Central Anatolia Region in Turkey, extract on PC-3 human prostate cancer cells in vitro. The anticancer activity of the ethanol extract obtained from whitebeam fruits evaluated using MTT cell proliferation assay. Also, Folin-Ciocalteu assay and CUPRAC method were performed to determine total phenol content and antioxidant capacity of whitebeam fruits, respectively. Whitebeam fruit extract showed strong anticancer activity on prostate cancer in vitro. The obtained ethanol extract is found to be a promising natural anticancer agent in vitro, and our findings need to be verified with in vivo studies and clinical trials.
The Methods Used in Monitoring of Large Dams in Turkey
Authors: Bali Haluk , Alcay Salih
Published: November 2020

Turkey is a very rich country in terms of water resources. However, in order to use these resources efficiently, water must be stored safely. In this context, the best form of storage is the construction of dams. In our country, large dams, which are among the world's important dams, are being built. Although there are many advantages of large dams, the loss of life and property will be so great in case of a possible deformation or destruction. The fact that dams are under the influence of various forces, as well as being located in the earthquake zone of our country, necessitates continuous monitoring of our dams. Dams are generally monitored using geodetic methods and geotechnical devices. However, mostly details of these two methods are evaluated separately in dam monitoring. Evaluating the results of both methods together is very important for the comprehensive monitoring of the dam and the correct interpretation of possible deformations. In this study, large dams in our country and monitoring studies carried out by using geodetic and geotechnical methods in these dams are given in detail.
Comparison of RT-PPP and RT-PPP-AR Methods
Authors: Alcay Salih , Atiz Omer Faruk , Ogutcu Sermet
Published: November 2020

The Precise Point Positioning (PPP) is an absolute positioning method which emerged as an alternative to the relative positioning method. This method is widely used in many applications in recent years. In this method the static and kinematic positioning can be performed with high accuracy by using single GNSS receiver. In the last few years, the PPP method has started to be used in real time (RT-PPP) thanks to the real-time precise products (satellite orbit and clock data) produced by different organizations like IGS, BKG, CNES, ESA, EUREF, GFZ etc. The high interest in RT-PPP has accelerated the development of this method and many software have been developed. Recently, some of the software have ability to apply integer ambiguity resolution (AR). For this purpose, in this study the positioning performance of RT-PPP method was tested using two options of PPP-WIZARD software (RT-PPP, RT-PPP-AR). Three IGS stations were chosen in different geographical regions. The real-time coordinates of the stations belong to the observation period of about 4 hours were derived simultaneously with the RT-PPP and RT-PPP-AR options in 1 second epoch interval. The results obtained are given in a comparative approach.
D Sınıfı Eviricinin Runge-Kutta Metodu ile Analizinin Yapılması
Authors: Öncü Selim , Ünal Kenan , Tunçer Uğur
Published: November 2020

D sınıfı eviriciler geniş kontrol aralığına sahip olmaları, az sayıda güç anahtarı ve anahtar sürücü devre elemanları gerektirmeleri ve yüksek güçleri kontrol edebilmeleri sebebiyle günümüzde birçok uygulamada kullanılmaktadır. Bu çalışmada D sınıfı rezonans evirici analizi Runge-Kutta algoritması ile gerçekleştirilmiştir. Yapılan analizin sonucunda evirici akımı ve gerilimi, kondansatör gerilimi gibi devre parametrelerine ait grafikler çizdirilmiştir. Aynı devre parametreleri MATLAB Simulink üzerinde yapılan benzetim çalışmasında da tekrarlanarak sonuçlar karşılaştırılmıştır ve Runge-Kutta algoritmasının doğruluğu ortaya konulmuştur.
Design and Application of Smart and Electrical Wheelchair and Charging Station for the Disabled Citizen
Authors: Tinğ Naim Suleyman , Ozel Huseyin , Celik Lokman , Ganidagli Enes , Akkamis Hilal
Published: November 2020

In this paper, the design and application of smart wheelchair and charging station for disabled citizen is realized. The first stage of the paper is to make the wheelchair used by our disabled citizens able to access smart home technology via the vehicle via touch screen. The ability of citizens with disabilities to call with direct access via touch screen is also in the wheelchair designed. Thanks to the touch screen placed on the vehicle, disabled citizens are provided with the control of smart automation to control many objects such as curtains and doors in the home. In the second part of the paper, a solar powered charging station is designed and installed in order to charge battery powered wheelchairs. In the charging station made a special card reader system and has the charger to charge the card with disabilities to actively and means are provided.
Selüloz Asetat/ Polivinilpirolidon Blend Membran ile Biyoetanolün Pervaporatif Dehidrasyonu
Authors: Ünlü Derya
Published: November 2020

Küresel ısınma ve yüksek petrol fiyatları, alternatif ve sürdürülebilir yenilenebilir enerji kaynakları üzerine araştırmaları artırmıştır. Biyokütleden fermantasyon yoluyla elde edilen biyoyakıtlar, fosil yakıtların yerine geçebilecek önemli alternatif yakıtlardır. Bununla birlikte, fermantasyon sonucu elde edilen ürün, yakıtın ısıl değerini büyük ölçüde azaltacak ve biyoyakıtların kullanımını sınırlayacak miktarda su içerir. Bu nedenle, biyoyakıtların dehidrasyonu önem kazanmaktadır. Pervaporasyon, düşük enerji tüketimi, atık üretmeyen çevre dostu özelliği ve azeotropik karışımları ayırmada mükemmel ayırma performansı nedeniyle biyoyakıtların dehidrasyonu için önemli bir ayırma teknolojisidir. Pervaporasyon prosesinde yüksek üretkenliğe, mükemmel seçiciliğe ve uzun süre kimyasal, termal ve mekanik dayanıma sahip membranın seçimi ve üretimi oldukça önemlidir. Membran malzemesi açısından, polimerik membranlar makul maliyetleri, üretim kolaylığı ve kolay ölçeklenebilirlikleri nedeniyle büyük ilgi görmektedir. Bu çalışmada selüloz asetat ve polivinilpirolidon polimerleri kullanılarak blend membranlar hazırlanmıştır. Hazırlanan membranda polivinilpirolidon oranları değiştirilerek blend membranın ayırma performansına etkisi incelenmiştir. Hazırlanan membranın biyoetanolün susuzlaştırılmasında oldukça iyi ayırma performansı sergilediği görülmüştür.
Doğrulayıcı Faktör Analizi ile Sağlık Sektöründe Hasta Memnuniyeti Ölçümü Üzerine Bir Uygulama
Authors: Bekmezci Esra Nur , Aktepe Adnan , Ersöz Süleyman
Published: November 2020

Sağlık sektörü, insanın yaşamını devam ettirebilmesi, hayat kalitesini artırabilmesi ve bu kaliteyi korumasında büyük bir öneme sahiptir. Bu bağlamda ülkelerdeki sağlık hizmetleri seviyesi gelişmişlik düzeyinde önemli bir role sahiptir. Hastanelerin hizmet sağladığı hastanın memnuniyet düzeyini artırması ve koruması gerekmektedir. Bu çalışmada bir Tıp Fakültesi Hastanesinde hizmet alan 200 hastanın memnuniyet ölçümü gerçekleştirilmiştir. Araştırmada veri toplamak için anket yöntemi kullanılmıştır. Memnuniyet dereceleri 5’li Likert tipi anket soruları ile ölçülmüştür. Ankette toplam 28 adet ölçüm değişkeni yer almaktadır. Çalışmada geliştirilen modelde İlgi, İletişim, Güvenilirlik, Sıra Bekleme, Fiziksel Özellik, Hijyen, Genel Memnuniyet ve Bağlılık gizli değişkenleri yer almaktadır. Elde edilen veriler Doğrulayıcı Faktör Analizi yöntemi ile analiz edilmiş olup, sonuçlar tartışılmıştır.
A Research on Encryption Methods and Account Security
Authors: Yayla Rıdvan , Üçgün Hakan , Tunçer Sefa
Published: November 2020

Nowadays, the virtual world is widely used by increasing of the precautions for the global pandemic. Therefore, the membership systems that are created on the basis of the user accounts have an important role in order to meet the increasing requirements. The most important requirements of the current systems are privacy and delivering of the datas as seamlessly for sending of the datas as security and receiving of the end users datas. The security of an account is enhanced by additional measures such as sms systems, authentication, security question, and robot control along with password complexity to prevent cyber attacks. Symmetric and asymmetric encryption algorithms are composed of easy and convenient methods for data privacy and integrity. In this study, the validity of the used encryption methods in today for the security of user accounts, which are becoming widespread in every field, is analyzed and the role of password complexity in account security is investigated.
Madenlerdeki Yaşam Koşullarının Mikrodenetleyici Tabanlı Sistem ile İzlenmesi
Authors: Üçgün Hakan , Öztürk Ismailhan
Published: November 2020

Sensör tabanlı akıllı sistemler, son yıllarda pek çok farklı alanda kullanılmakta ve popülerliği giderek artmaktadır. Akıllı şehir teknolojileri, endüstri 4.0, robotik uygulamaları, 3D yazıcılar gibi pek çok sistem temelinde sensör sistemleri kullanmaktadır. Farklı boyutlarda ve farklı amaçlar için kullanılan sensörler genel olarak, ortamlarda meydana gelen değişikliklerin algılanması veya izlenmesi amacıyla kullanılmaktadır. Bu çalışma kapsamında madenlerde çalışan insanların sağlığını korumak ve madenlerde yaşanabilecek çökme, gaz sıkışması gibi problemlerin ortadan kaldırılmasına yönelik bir izleme ve uyarı sistemi gerçekleştirilmiştir. Madende çalışan personellerin sağlık koşulları ve güvenliklerinin sensör temelli olarak izlenmesi ve belirlenen eşik seviyelerinin dışına çıkıldığında uyarı sisteminin devreye girmesi sağlanmaktadır. Gerçekleştirilen sistemde madendeki, sıcaklık, ışık şiddeti, CO2 (karbondioksit) miktarı ve CH4 (metan gazı) miktarı sensörler aracılığıyla ölçülmekte ve bu değerler Arduino Uno kontrolcü kartı ile işlenmektedir. Sistemde, herhangi bir problem yaşanması durumunda buzzer ve led aracılığıyla uyarılar verilmekte ve motor yardımıyla havalandırma işlem gerçekleştirilmektedir.