161 research outputs found
Experimental investigation of effects of single and mixed alternative fuels (gasoline, CNG, LPG, acetone, naphthalene, and boron derivatives) on a commercial i-DSI engine
No full textDogu, Yahya/0000-0003-0474-2899; YONTAR, AHMET ALPER/0000-0002-5453-5137; Kantaroglu, Emrah/0000-0002-6127-4318A commercial i-DSI (Intelligent-Dual Sequential Ignition) engine is tested to investigate performance and emissions for single fuels and alternative fuels mixed into gasoline. The novelty of the study is the first time testing of the unconventional mixture of boron derivatives and quantification and comparison of real engine characteristics for 11 different fuels for the same commercial engine. Tested single fuels are gasoline (G100), CNG (CNG100), and LPG (LPG100). While the engine runs with gasoline, gaseous fuels are injected into the intake line at a mass rate of 10% CNG (CNG10) and 5% LPG (LPG5). The engine is also tested by adding 25-50% acetone (A25-A50) and 50% naphthalene (N50) into gasoline. Tests are also performed by mixing boron derivatives of borax-pentahydrate (BP), anhydrous-borax (AB), and boric-acid (BA) into gasoline. Tested fuels worsen engine performance compared to gasoline, except for brake specific fuel consumption (BSFC). There is a positive change in emissions for tested fuels compared to gasoline, except that NOx increases 4-5 times for CNG and LPG. One of the important findings is that, for boron-gasoline mixtures, the torque reduces by 4.0% for BP, 4.4% for AB, and 4.4% for BA. The volumetric efficiency decreases by 6.3% for BP, 7.3% for AB, and 8.5% for BA. The BSFC decreases 5.8% for BP, increases 0.4% for AB and decreases 15.2% for BA. Boron derivatives dissolved in gasoline diversely affect combustion and give some advantage in particular for BA and BP in terms of BSFC. In addition, boron-gasoline reduces the formation of HC and NOx.Scientific Research Coordination Unit of Kirikkale University, Kirikkale, TurkeyThis work was supported by the Scientific Research Coordination Unit of Kirikkale University, Kirikkale, Turkey
The Portrayal of Family and Self-reflexivity in Luigi Pirandello’s Six Characters in Search of an Author
No full textLuigi Pirandello’s play, Six Characters in Search of an Author (1921, Sei personaggi in cerca d’autore)
portrays numerous significant and functional characteristics of metatheatre, a concept coined by Lionel
Abel. By drawing on such metatheatrical features and the play within a play technique, Pirandello’s play
presents six characters that are in search of an author. This study will, therefore, explain the concept
of metatheatre and present a critical analysis of the play, Six Characters as a self-reflexive play. In this
critical engagement with the text through specific references from the play and relevant secondary sources,
important themes in the play such as reality and illusion, life, art, and the representation of the family in the
play will be analysed. This analysis will ultimately demonstrate that Pirandello presents six characters that
are self-conscious of their position as dramatic characters that manage to act out their roles, which actually
reveal the family relationships between the characters
Influence of different Reynolds numbers and new geometries on water jacket cooling performance in a CI engine
No full textPhysical damage and emission increases that may occur in the engine due to uncontrolled temperature increases are prevented by cooling systems. In this study, the water jacket (WJ) of the F-Type F8Q706 engine was examined for different Reynolds numbers and geometries. With a combined examination approach, engine tests, 1D engine model, 3D in-cylinder combustion (ICC) model, and 3D WJ CFD studies are presented together, for the first time. Accordingly, a 3D WJ CFD model was developed using in-cylinder parameters calculated from 1D and 3D ICC which were verified by tests. Engine powers in 1D and 3D models, heat transfer, liner temperature, and heat flux in WJ models were compared. The engine powers at 2500 rpm with wide-open throttle are as follows: 1D (33.610 kW), 3D ICC (32.075 kW), engine catalog test (30.890 kW), and a literature test (29 kW). In the WJ model, instead of the Reynolds number 22,128.97, values of 18,440.81-15,367.34-12,806.11-1067.76-8893.14-7410.95-6175.79 were used. In this case, heat transfer decreased by 11.224%-20.844%-29.940%-38.168%-45.723%-52.874%-59.340%. Liner temperature increased by 3.962%-7.505%-10.879%-13.958%-16.800%-19.470%-21.822%. As the Reynolds number decreased, heat transfer decreased, and liner temperature increased. In the WJ, uncontrolled temperature increases were seen in areas farthest from the water inflow. Unlike studies using nanofluids, a new WJ geometry with 169 fins was developed for cooling performance. Nanoparticles cause damage to elastomeric system elements, clogging, and corrosion in lines. This geometry increased heat transfer by 42.01% and reduced liner surface temperatures by 48.28% for 22,128.966 Re. Repeated analyses showed that the fins increased heat transfer
Liquid Level Process Control with Fuzzy Logic Based Embedded System
No full text9th International Conference on Electrical and Electronics Engineering (ELECO) --NOV 26-28, 2015 -- Bursa, TURKEYBirtane, Sibel (Arel Author), Dikbıyık, Emrah (Arel Authro) --- WOS: 000380410800155In this study, the design of embedded Sugeno fuzzy logic based controller for controlling non-linear liquid level process is realized. First, the system was activated on Matlab-Simulink platform and uploaded to Arduino Mega. With this study, activation of modern control methods on embedded systems is simplistically proven. When the control system operation was checked out, it has been observed that it was pretty successful.Chamber Elect Engineers Bursa Branch, Istanbul Techn Univ, Fac Elect & Elect Engn, Uludag Univ, Dept Elect & Elect Engn, IEEE, Reg 8, IEEE Turkey Sect, CAS Chapter, Sci & Technol Res Council Turke
Translating Thomas More into Turkish: Domestication and Foreignization Strategies in Utopia (1516)
No full textThomas More’s seminal text, Utopia (1516), a highly significant text of utopian literature, or the founding text of the literary tradition of utopianism, as some scholars argue, has been translated numerous times into Turkish. More’s text has become crucial as an inspirational source in the quest for utopia, which the utopian scholar Lyman Tower Sargent describes as “a non-existent society described in considerable detail and normally located in time and space” (1994, p. 9). Although there does not exist a rich tradition of utopianism in Turkish literature, there has been a growing interest in the literary genre over the last decades, which has accordingly resulted in a substantial increase in the quantity and quality of such utopian and dystopian works to be produced and to be translated. More’s text has been translated from such languages as English, German, French, and Latin into Turkish, but there exists only one translation from Latin, the original language of the source text. In this regard, this presentation will seek to compare and analyze these different translations of More’s Utopia with specific references to the domestication, which can be described as “an ethnocentric reduction of the foreign text to target language cultural values, bringing the author back home” (Venuti, 1995, p. 20) and foreignization, which “allows the readers to experience the ‘otherness’ of a foreign text” (Ajtony, 2017, p. 96) strategies
Hope in Speculative Literature: Utopia & Dystopia on the Screen
No full textSpeculative fiction offers a possibility to look beyond the reality and to imagine alternative world scenarios, which enables us an opportunity to question the existing social order through its potential to break existing boundaries of normality and imagine the impossible and the unknown. Therefore, the figures who have been traditionally accepted as “abnormal” or socially excluded are given a voice in the imagined or fantastic realms of speculative works. Speculative texts, which have become especially popular with the COVID-19 pandemic, have a strong potential to function as warnings through their worldbuilding capacity, as they draw particular attention to numerous problems and issues such as ecological crisis, climate crisis, population problem, and the use of technology.
In this regard, utopia and dystopia, which can be categorized as the subgenres of speculative literature, have gained popularity both in academia and among the general public, as people are attracted more and more by dystopian futures and quests to discover utopian dreams. Dystopia, which the eminent utopian scholar Lyman Tower Sargent describes as “a non-existent society described in considerable detail and normally located in time and space that the author intended a contemporaneous reader to view as considerably better than the society in which the reader lived” is traditionally considered to be lacking in hope, as dystopian narratives illustrate nightmarish world scenarios but hope in dystopian fiction can be ascertained through a close reading of such relevant works (“The Three Faces,” 1994: 9). In this regard, the aim of this paper is to seek hope and utopian impulse in speculative fiction through the discussion of selected utopian and/or dystopian works, especially critical dystopias, and their screen adaptations
Influence of acetone addition into gasoline for i-DSI engine
No full textDespite the notable properties of acetone due to its volatility and oxygen content as a fuel additive, very few studies have been limited to small size special purpose engines. A comparative testing and 3D in-cylinder combustion CFD studies are presented for acetone-gasoline blend in an i-DSI commercial car engine as the first time. The blends contain mass ratio of acetone by 0-2-5-10-20% (G100-A2-A5-A10-A20). In testing, torque reduced 0.33% (A2), 0.66% (A5), 0.84% (A10), and 1.45% (A20) compared to gasoline. The BSFC decreased by 0.27% (A2), 0.55% (A5), 0.79% (A10), and increased 0.26% (A20). Volumetric efficiency decreased by 3.2-6.4-5.1-11.5% for A2-A5-A10-A20. The CO emission for blends is less than gasoline by 1.5% (A2), 4.0% (A5), 15.2% (A10), and 33.6% (A20). The CO2 decreased 0.8% (A2), and increased 1.3% (A5), 4.6% (A10), and 11.4% (A20). The HC reduced by 7.0% (A2), 10.1% (A5), 23.8% (A10), and 34.4% (A20). The NOx formation increased by 3.6% (A2), 4.4% (A5), 27.6% (A10), and 87.8% (A20). Acetone addition decreased torque and slightly increased BSFC. CO and HC decreased while CO2 and NOx increased with increasing acetone ratio. Acetone indeed improves the combustion while its final effect on engine performance is not found to be favorable
The validity and reliability of the Turkish version of the 6-item female sexual function index (FSFI-6) and the relationship between climacturia and female sexual dysfunction
No full text© 2021, The Author(s), under exclusive licence to Springer Nature Limited.This study aims to assess the validity and reliability of the Turkish version of the FSFI-6 questionnaire,an abbreviated version of FSFI-19,a common tool for evaluating female sexual function. The study included 120 female patients aged between 18–65 years who presented to the urology clinic between December 2019 and March 2020. The Turkish version of FSFI-6 was translated from the English version for validation. The abridged FSFI-6 questionnaire consists of questions 2, 4, 7, 11, 16, and 17 of the FSFI-19 form. We recorded the demographic data of the patients. All subjects filled out the FSFI-19 and FSFI-6 questionnaires. The patients were asked to fill out the questionnaires again after two weeks. The mean age of the subjects was 46.58 ± 9.89 years (28–63). The results of the reliability analysis indicated that the intraclass correlation coefficient of the total FSFI-6 score was 0.92 (weighted kappa coefficients of individual items, 0.868–0.975) and the Cronbach’s alpha was 0.862. The validity analysis indicated that the mean total FSFI-6 score was strongly correlated with the mean FSFI-19 score (p < 0.001, r = 0.997). In the test-retest analysis,the kappa coefficient was calculated as 0.891. The FSFI-19 and FSFI-6 scores of the patients with (n = 52) and without climacturia (n = 68) were compared, and it was observed that the scores of the patients with climacturia were significantly lower than those without climacturia (p < 0.001). The abbreviated FSFI-6 questionnaire is a valuable tool for screening women with FSD. It can be used more extensively due to being short and easy to apply. Our results approve the Turkish version of the questionnaire as a valid and reliable tool for evaluating FSD
OPCOMITS: Developing an Adaptive and Intelligent Web Based Educational System Based on Concept Map Model
No full textDikbıyık, Emrah (Arel Author)Concept map model is a method that creates domain model by identifying the relationship between concepts in course contents. This study presents an adaptive intelligent web based learning system called OPCOMITS (Object Oriented Programming Tutor using Concept Map Model). OPCOMITS has a free domain model which can be regulated by an expert for any course. It uses concept map model to regulate the topic hierarchy, to measure the student's knowledge about a topic and to stimulate learning. By employing a concept map model, it structures the course and provides an environment in which the lecturer can arrange the chapters, topics, concepts and the prerequisite relationships between the concepts. Thus, it offers an adaptive and effective learning environment by measuring the level of student's knowledge about a topic, offering reinforcing feedback, diagnosing students' weaknesses and directing them to related chapter topic in the domain for revisions. To evaluate the effectiveness of the proposed approach an experiment has been conducted on Computer Programming department in Object Oriented Programming course. From the experimental results, it is found that OPCOMITS has contributed to the academic success of students using it and students have exhibited much better learning than those who have used a conventional e-learning system
A Semantic-Embedding Model-Driven Seq2Seq Method for Domain-Oriented Entity Linking on Resource-Restricted Devices
No full textGeneral entity linking systems usually leverage global coherence of all the mapped entities in the same document by using semantic embeddings and graph-based approaches. However, graph-based approaches are computationally expensive for open-domain datasets. In this paper, the authors overcome these problems by presenting an RDF embedding-based seq2seq entity linking method in specific domains. They filter candidate entities of mentions having similar meanings by using the domain information of the annotated pairs. They resolve high ambiguous pairs by using Bi-directional long short-term memory (Bi-LSTM) and attention mechanism for the entity disambiguation. To evaluate the system with baseline methods, they generate a dataset including book, music, and movie categories. They achieved 0.55 (Mi-F1), 0.586 (Ma-F1), 0.846 (Mi-F1), and 0.87 (Ma-F1) scores for high and low ambiguous datasets. They compare the method by using recent (WNED-CWEB) datasets with existing methods. Considering the domain-specificity of the proposed method, it tends to achieve competitive results while using the domain-oriented datasets.Scientific and Technological Research Council of Turkey (TUBITAK) 2211 National Graduate Scholarship ProgramThe first author Emrah Inan was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) 2211 National Graduate Scholarship Program during his PhD in Ege University, Turkey
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