Burst Tails from SGR J1550-5418 Observed with Rossi X-ray Timing Explorer

We present the results of our extensive search using the Bayesian block method for long tails following short bursts from a magnetar, SGR J1550-5418, over all RXTE observations of the source. We identified four bursts with extended tails, most of which occurred during its 2009 burst active episode. The durations of tails range between ~13 s and over 3 ks, which are much longer than the typical duration of bursts. We performed detailed spectral and temporal analysis of the burst tails. We find that the spectra of three tails show a thermal nature with a trend of cooling throughout the tail. We compare the results of our investigations with the properties of four other extended tails detected from SGR 1900+14 and SGR 1806-20 and suggest a scenario for the origin of the tail in the framework of the magnetar model.Comment: 10 pages, 7 figures, 4 tables, accepted for publication in Ap

A glitch and an anti-glitch in the anomalous X-ray pulsar 1E 1841-045

We investigated the long-term spin properties of the anomalous X-ray pulsar (AXP) 1E 1841-045 by performing a temporal analysis of archival RXTE observations spanning about 5.2 yr from 2006 September to 2011 December. We identified two peculiar timing anomalies within ~1 yr of each other: a glitch with Delta(nu)/nu ~ 4.8 x 10^{-6} near MJD 54303; and an anti-glitch with Delta(nu)/nu ~ -5.8 x 10^{-7} near MJD 54656. The glitch that we identified, which is the fourth glitch seen in this source in the 13 yr of RXTE monitoring, is similar to the last two detected glitches. The anti-glitch from 1E 1841-045, however, is the first to be identified. The amplitude of the anti-glitch was comparable with that recently observed in AXP 1E 2259+586. We found no significant variations in the pulsed X-ray output of the source during either the glitch or the anti-glitch. We discuss our results in relation to the standard pulsar glitch mechanisms for the glitch, and to plausible magnetospheric scenarios for the anti-glitch.Comment: 6 pages, 3 figures, 3 tables, published in MNRA

Optimization of reverse logistics network of End of Life Vehicles under fuzzy supply: A case study for Istanbul Metropolitan Area

Recycling aims at preventing rapid depletion of natural resources while transforming produced waste into value for economy. However, this process becomes a major challenge in automotive industry, which requires cooperative engagement of multiple players within a complex supply chain. In line with the essence of the topic, government agencies around the world issue directives drawing regulatory frameworks for designing recycling operations comprising various activities such as collection of end-of-life vehicles (ELVs), recovery of reusable components, shredding ELV's body, recycling valuable materials and disposal of the hazardous waste. In general, the amount of returned product in a reverse logistics network is highly uncertain, and the ELV market in Turkey is no exception to this. For that purpose, this study aims developing a fuzzy mixed integer location-allocation model for reverse logistic network of ELVs conforming to the existing directives in Turkey. Accordingly, this study uses a novel approach and assumes that ELV supply in the network is uncertain. The merit of the proposed mathematical model is proved on a real world scenario addressing the reverse logistics design problem for ELVs generated in metropolitan area of Istanbul. The network generated specifies that recycling process is not profitable under the existing circumstances with the given level of supplied ELV and the returned product records per capita in Istanbul are far beyond the EU averages. Consequently, sensitivity analyses question the reliability of the obtained results.WOS:0004593583000882-s2.0-8506018772

Robot-Assisted Drilling on Curved Surfaces with Haptic Guidance under Adaptive Admittance Control

Scientific and Technological Research Council of Turkey (TUBITAK) [EEEAG-117E645]This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under contract number EEEAG-117E645Drilling a hole on a curved surface with a desired angle is prone to failure when done manually, due to the difficulties in drill alignment and also inherent instabilities of the task, potentially causing injury and fatigue to the workers. On the other hand, it can be impractical to fully automate such a task in real manufacturing environments because the parts arriving at an assembly line can have various complex shapes where drill point locations are not easily accessible, making automated path planning difficult. In this work, an adaptive admittance controller with 6 degrees of freedom is developed and deployed on a KUKA LBR iiwa 7 cobot such that the operator is able to manipulate a drill mounted on the robot with one hand comfortably and open holes on a curved surface with haptic guidance of the cobot and visual guidance provided through an AR interface. Real-time adaptation of the admittance damping provides more transparency when driving the robot in free space while ensuring stability during drilling. After the user brings the drill sufficiently close to the drill target and roughly aligns to the desired drilling angle, the haptic guidance module fine tunes the alignment first and then constrains the user movement to the drilling axis only, after which the operator simply pushes the drill into the workpiece with minimal effort. Two sets of experiments were conducted to investigate the potential benefits of the haptic guidance module quantitatively (Experiment I) and also the practical value of the proposed pHRI system for real manufacturing settings based on the subjective opinion of the participants (Experiment II). The results of Experiment I, conducted with 3 naive participants, show that the haptic guidance improves task completion time by 26% while decreasing human effort by 16% and muscle activation levels by 27% compared to no haptic guidance condition. The results of Experiment II, conducted with 3 experienced industrial workers, show that the proposed system is perceived to be easy to use, safe, and helpful in carrying out the drilling task.IEEE,Royal Soc Japan,IEEE Robot & Automat Soc,IES,SICE,New Technol FdnWOS:0009083682021152-s2.0-85146352560Conference Proceedings Citation Index – ScienceProceedings PaperUluslararası işbirliği ile yapılmayan - HAYIRMart2022YÖK - 2022-2

Evaluation of the Electronic Resource Usage of Ankara University Faculty Members

Günümüzde üniversiteler, eğitim-öğretim, araştırma ve uygulama faaliyetleri içerisinde bulunabilmek için bilimsel bilgiye en doğru ve en hızlı biçimde ulaşmayı hedeflemektedir. Bundan dolayı, Ankara Üniversitesi akademik personelinin bilimsel bilgiye erişim için çağdaş bilgi ve iletişim teknolojilerini kullanması kaçınılmazdır. Bilimsel her veri tabanının standart taşıması gereken belirli özellikleri bulunmaktadır. Bu özellikler veri tabanında yer alan verilere erişimin doğru ve hızlı olması bakımından önem kazanmaktadır. Ankara Üniversitesi mensuplarına gereksinim duyacakları bilimsel bilgi kaynakları elektronik ortamda en çağdaş bilgi ve iletişim teknolojilerini kullanarak sunulmaktadır. Bu araştırmada, Ankara Üniversitesi akademik personelinin bilgi gereksinimleri doğrultusunda oluşturulan ve elektronik kütüphanede yer alan veri tabanlarının kullanılıp kullanılmadığının belirlenmesi amaçlanmış; bu amaca yönelik bilgi modeli ve içeriği belirlenerek uygulamaların gerçekleştirilmesi hedeflenmiştir.Education, research, and implementation activities of universities necessitate access to information in the most accurate and fastest manner in today's conditions. In this regard; Members of Ankara University have to access scientific information through the most contemporary information and communication technology in the electronic environment, primarily through the global internet system. Each scientific database has specific standard characteristics. These properties gain importance in terms of the correctness and speed of access to the data contained in the database. The sources of scientific information that the members of Ankara University will need are presented in the electronic environment using the most contemporary information and communication technologies. This article aims to determine the information needs of the members of Ankara University and to determine the information access and the use of information by identifying the information access model for researching the educational facilities and the necessary infrastructure and technical support so that the maximum benefit can be obtained from the electronic library. Aims at realizing their application by determining the information model and content for this purpose

İğne deliği fotoğraf ve çağdaş kullanımı

ÖZET İĞNE DELİĞİ FOTOĞRAF VE ÇAĞDAŞ KULLANIMIFotoğraf yapısABSTRACTPİNHOLE PHOTOGRAPHY AND CONTEMPORARY USESPhoto structurally with the aid of a machine, within certain limits the two-dimensional images created on flat surfaces occur in a certain measure. The most basic technique to create a pinhole image of a machine and therefore do not depend on the specific surface and the limits of measurement is able to produce images. The wealth owned by a small number of technical terms that are preferred by the individual photographers and photo fancier. The simple structure of the primitive form of the technique and the recognition of its wrong and leads to the formation of prejudices. This is what is working with the pinhole technique, is explained by what can be done. Sufficiently understood the technique has been observed during the research process. Working with the technique is not an ordinary device, as well as the simplicity of the required special needs, take advantage of this technique are given in the contributions of artists to the art of photography with a variety of production.al olarak bir makine yardımı ile belli sınırlar dâhilinde iki boyutlu düz yüzeylerde belli ölçü sınırlarında oluşturulan görüntülerden meydana gelmektedir. Görüntü oluşturmanın temel yolu olan iğne deliği bir makineye ve dolayısıyla belirli yüzey ve ölçü sınırlarına bağlı kalmadan fotoğraf üretebilmektedir. Teknik sahip olduğu zenginlik açısından çok az sayıda ki fotoğraf sanatçısı ve fotoğraf meraklısı birey tarafından tercih edilmektedir. Tekniğin basit yapısı ve ilkel formu onun yanlış tanınmasına ve ön yargıların oluşmasına yol açmaktadır. Bu çalışma ile iğne deliği tekniğinin ne olduğu, neler yapılabileceği hakkında bilgi verilmiştir. Araştırma sürecinde tekniğin yeterince anlaşılmadığı gözlemlenmiştir. Çalışma ile tekniğin sıradan bir araç olmadığı, basitliğinin yanı sıra ihtiyaç duyulan özel gereksinimlerine, bu teknikten faydalanan sanatçıların üretim çeşitliliği ile fotoğraf sanatına katkılarına yer verilmiştir

İğne deliği fotoğraf ve çağdaş kullanımı

İĞNE DELİĞİ FOTOĞRAF VE ÇAĞDAŞ KULLANIMI Fotoğraf yapısABSTRACT PİNHOLE PHOTOGRAPHY AND CONTEMPORARY USES Photo structurally with the aid of a machine, within certain limits the two-dimensional images created on flat surfaces occur in a certain measure. The most basic technique to create a pinhole image of a machine and therefore do not depend on the specific surface and the limits of measurement is able to produce images. The wealth owned by a small number of technical terms that are preferred by the individual photographers and photo fancier. The simple structure of the primitive form of the technique and the recognition of its wrong and leads to the formation of prejudices. This is what is working with the pinhole technique, is explained by what can be done. Sufficiently understood the technique has been observed during the research process. Working with the technique is not an ordinary device, as well as the simplicity of the required special needs, take advantage of this technique are given in the contributions of artists to the art of photography with a variety of production. al olarak bir makine yardımı ile belli sınırlar dâhilinde iki boyutlu düz yüzeylerde belli ölçü sınırlarında oluşturulan görüntülerden meydana gelmektedir. Görüntü oluşturmanın temel yolu olan iğne deliği bir makineye ve dolayısıyla belirli yüzey ve ölçü sınırlarına bağlı kalmadan fotoğraf üretebilmektedir. Teknik sahip olduğu zenginlik açısından çok az sayıda ki fotoğraf sanatçısı ve fotoğraf meraklısı birey tarafından tercih edilmektedir. Tekniğin basit yapısı ve ilkel formu onun yanlış tanınmasına ve ön yargıların oluşmasına yol açmaktadır. Bu çalışma ile iğne deliği tekniğinin ne olduğu, neler yapılabileceği hakkında bilgi verilmiştir. Araştırma sürecinde tekniğin yeterince anlaşılmadığı gözlemlenmiştir. Çalışma ile tekniğin sıradan bir araç olmadığı, basitliğinin yanı sıra ihtiyaç duyulan özel gereksinimlerine, bu teknikten faydalanan sanatçıların üretim çeşitliliği ile fotoğraf sanatına katkılarına yer verilmiştir

THE EFFECT OF TEMPERATURE ON REPRODUCTION OF Bacillus Cereus IN BABY FOODS

The reason that I was choosing this topic is that my little cousin had a posining because of a baby food. I thought the baby food’s expiration date passed but it wasn’t so I researched what was in the baby food and what can make puke my cousin and I found a microorganism called Bacillus cereus. It can reproduce while heating the meal or baby food so while my cousins’s mom was preparing his meal she heated the baby food so maybe Bacillus cereus poisoned so I wonder when the baby food heated, the amount of microorganism may increase and I wanted to explore this topic in my extended essay

A viable childbirth after correction of spontaneous uterine dehiscence

We report a case of uterine dehiscence during pregnancy. Uterine dehiscence and rupture are serious complications of pregnancy. This situation takes place especially in women that prior uterine operation(s). We represent a 30-year-old woman diagnosed uterine dehiscence at 22nd gestation week. Uterine dehiscence treated surgically and then medical treatment was given to prevent preterm labour. At 34th gestation week, the patient was operated because of preterm labour and an alive foetus was born. The result of the pathologic examination of the placenta: Placental adhesion failure was detected. In conclusion women with prior caesarean delivery (one or more), ultrasound measurement should be recommended for measuring the lower uterine segment thickness in order to predict the possibility of uterine dehiscence and rupture