374 research outputs found
Biomechanical determination of the relationship between femoral neck lesion size and the risk of pathological fracture
No full textPurpose: Half of the pathological fractures of the proximal femur occur in the neck region. We evaluate the relationship between the defect size within the femoral neck and the risk of pathological fracture. Methods: After creating metastasis-like lesions in the neck regions of 21 human cadaver femurs, compression was applied to simulate single-limp stance type loading. First, a loading of 600 Newtons (N) was applied to the 35%-defected femoral necks. If the bone fracture did not occur, the defect size was increased to 45% and the 600 N force was applied again. If no fracture was observed then the defect size was increased to 55% and the bones were loaded again. The 55%-defected bones with no fractures were loaded until a fracture was detected. Results: There were no fractures with the 35%- and 45%-defected femurs until 600 N was applied. However, when the defect size was increased to 55%, 3 bones were fractured before reaching 600 N. The fractures occurred at an average of 455 N in the 3 bones. At a compression of 600 N, 18 bones (84%) were intact, and the loading was continued. 18 femurs with 55%-defected neck regions had an average endurance of 1270 N compression (range 750-2800 N). Conclusions: This study showed that even very osteoporotic bones with large metastases can withstand high forces of compressive loading
Forty years of research trends in long-acting injectable antipsychotics: a bibliometric analysis
No full textMert, Alper/0000-0001-5944-9089Background Using long-acting injectable (LAI) antipsychotics is crucial for treating psychiatric illnesses, particularly those within the schizophrenia spectrum. Through bibliometric analysis, our study aimed to provide an understanding of the changes in research trends related to LAIs over the past 40 years.Methods We collected the publications from 1983 to 2023 related to research studies on LAIs included in the Web of Science database. Two thousand four hundred and twelve publications were selected based on specific criteria and analyzed using the VOSviewer software and the Biblioshiny app. We obtained and presented data on institutional analysis, country analysis, author and co-authorship analysis, journal analysis, funding agencies, and keyword citation numbers.Results From the period 1983-1992 to 2014-2023, the number of total publications showed a significant growth of 4.91. The majority (approximately 90%) of publications were produced in high-income countries. The private sector may play a significant role in research. The most crucial keywords were schizophrenia and risperidone.Conclusions The trend in LAI research is currently dynamic and ongoing. There seems to be an increasing connection between studies and LAIs that contain second-generation antipsychotics. The number of studies relating to the private sector is noteworthy
Meslek yüksekokulu öğrencilerinin kariyer planlarının motivasyon düzeylerine etkilerinin araştırılması
No full textAkdemir, Ali (Arel Author), Mert Karagöz, Aslı (Arel Author), Salihoğlu, Gülay (Arel Author), Adalı, Pınar (Arel Author), Koçyiğit, Erol (Arel Author), Zaimoğlu, Özlem (Arel Author).Bu araştırma Meslek Yüksekokulları ön lisans öğrencilerinin kariyer planlarının motivasyon düzeylerine etkisini cinsiyet, vakıf veya devlet üniversitesi olma, üniversiteye giriş şekli ve okunulan bölüm boyutlarıyla araştırmaktadır. Araştırmanın örneklem grubunu 2013-2014 eğitim öğretim dönemindeki İstanbul Arel Üniversitesi ve Kocaeli Üniversitesi Meslek Yüksekokulu öğrencileri oluşturmaktadır. Basit tesadüfî örnekleme yöntemi ile belirlenen 1514 öğrenciye anket uygulanmıştır. İstatistiksel analizlerde t testi, tek yönlü varyans analizi(one-way Anova), Kariyer Planları ve Motivasyon Düzeyleri arasındaki ilişkiyi ölçmek amacıyla Korelasyon analizi yapılmıştır. Kariyer ve motivasyon için yapılan geçerlilik ve güvenirlilik analizlerine göre kariyeri oluşturan soruların Cronbach Alfa katsayısı 0,798 ve Cronbach Alfa değeri 0,742 olarak bulunmuştur. Öğrencilerin eğitim gördükleri Üniversite, eğitim alanı ile kariyer planları ve motivasyon düzeyleri arasında anlamlı farklılıklar bulunmuştur. Kariyer ile motivasyon düzeyi arasında pozitif yönde bir ilişki vardır
Object tracking robot: smart transport system
No full textİleri, Fatih (Dogus Author) -- Kavaf, Hasan Mert (Dogus Author) -- Tükel, Dilek (Dogus Author) -- Conference full title: Elektrik Elektronik Mühendisliği Kongresi, EEMKON 2017: İstanbul, Türkiye, 16-18 Kasım 2017.Hızla gelişen teknoloji artık hayatlarımızın vazgeçilmez bir parçası haline gelmiş durumdadır. Özellikle tıp alanındaki
gelişmeler ve daha sonra ulaşım konuları hayati önem taşımaktadır. Günümüzde insanlar devamlı hareket halindedir
ve çok sık seyahat etmektedir. Bu proje de hayatımızı kolaylaştırmak amacıyla tasarlanmış bir projedir. Elle kontrol
olmadan, insanı takip eden bir platform tasarlanmıştır. Geliştirilen sistem havaalanları, marketler gibi düz ve sabit
bir ışık altında olan kapalı mekanlarda çalışabilmektedir.Every year the technology brings some innovations and life hacks to our lives. Also this project is designed for making the life easier. For that purpose, an object tracking platform is designed. In this project, a platform can track an object/human (with mounted object). Especially in the airports or shopping markets. It can be very useful to make the customer move freedomly. Airports and shopping markets are mentioned as especially because they are indoor places with constant brightness and plank surfaces
Routes And Harbour Archaeology: An attempt to Identify Some Ancient Toponyms on the Eastern Adriatic Coast
No full textAncient geographical works, from the Pseudo-Skylax’s Periplous to the Ravenna Cosmography, talk about several toponyms of the Eastern Adriatic coast, most of which concerning islands. concerning
islands. Some of these toponyms have been identified, usually paying attention to phylological more than
to archaeological data, whereas most of them have not yet been clearly identified. In recent years new archaeological
excavations concerning also harbour structures give us some information to draw the landing-places
map of the Eastern Adriatic coast. What’s more, recently were intestigated the shipwrecks and the ancient
sea routes, which are today the same in ancient times. So through an analysis of the port structures and of the
maritime routes he author tries to identify some toponyms mentioned by Pliny the Elder (Nat. 3. 140, 152) and
Claudius Ptolemaeus (Geog. 2. 16. 2). In particular about the first work, he suggests locating civitas Pasini on
the coast between Nin/None and Zara and correcting the usual identification of Portunata: in fact, he thinks it
should correspond to the modern islands of Ugliano/Ugljan or Pasman and not to the Isola Grossa/Dugi Otok.
About the second work, he identifies the ptolemaic city of Οὐολκέρα with the modern city of Cirquenizza/
Crikvenica, on the base of recent archaeological publications
Retrospective Analysis of Zygomatic Implants for Maxillary Prosthetic Rehabilitation
No full textPurpose: The aim of this study was to evaluate 141 zygomatic implants for the reconstruction of severely atrophic maxillae. Materials and Methods: In this retrospective case series study, zygomatic implants were placed under general anesthesia. Inclusion criteria were as follows: ASA I or ASA II, age older than 18 years, inadequate bone for restoration with conventional implants, alternative augmentation procedures considered either inappropriate or contraindicated, absence of a medical condition related to implant failure, and providing written consent. Zygomatic implants used in the study consisted of three different brands: NobelZygoma, Southern Implants System, and Implantswiss. Results: The study included 45 patients, in whom 141 zygomatic implants were placed. The mean age of the patients was 51.76 (range: 23 to 72) years. Three patients were rehabilitated with removable prostheses, 19 patients with fixed prostheses, and 23 patients with hybrid prostheses. The overall complication rate was 5.67% (two zygomatic implants developed infection [1.4%], one zygomatic implant developed peri-implantitis [0.7%], three zygomatic implants developed sinusitis [2.1%], and two zygomatic implants showed unsuccessful prosthetic rehabilitation [1.4%]). The follow-up period ranged from 6 to 36 months. Conclusion: Clinical complications of zygomatic implants are acceptable, and their survival rates are similar to those of endosteal implants. Zygomatic implants can contribute to prosthetic rehabilitation
Mid-term radiological and functional results of biological reconstructions of extremity-located bone sarcomas in children and young adults
No full textBiological reconstruction is a useful option for reconstruction following bone sarcoma resection in children. The mid-term functional and radiological outcomes of biological reconstructions after resection of bone sarcomas in children are presented in this study. Eighteen patients [average age 12.5 years (range 4-22 years)] with primary sarcomas of long bones underwent wide surgical resection and biological reconstruction. The bone defects were managed by intercalary (n=14), osteoarticular (n=3) reconstructions and arthrodesis (n=1) with a vascularized fibular graft (VFG). VFG was combined with a massive allograft in seven lower extremity reconstructions. The average follow-up was 45.7 months (range 25-78 months). Graft union and graft hypertrophy was observed in 17 (94.4%) of 18 patients at 12 months. The VFG-allograft osteointegration rate was 100% at 24 months. The average final follow-up Musculoskeletal Tumor Society (MSTS) scores for lower and upper extremity reconstructions were 79.7% (range 66.6-90%) and 80.9% (range 53.3-100%), respectively. Four (22.2%) complications, including nonunion (n=1), implant failure (n=1), infection (n=1) and skin necrosis (n=1), required reoperation. The disease relapsed in three (16.6%) patients. Defect size and VFG length did not correlate with MSTS scores and radiological parameters (P>0.05). Biological reconstruction with VFG can provide permanent stability and progressively increasing functional and radiological results. Copyright (C) 2015 Wolters Kluwer Health, Inc. All rights reserved
Epidural Analgesia and Lactation
No full textPresent-day mothers have an increased desire to breastfeed, but this desire has increased in parallel with the increased use of epidural analgesia during labor. Epidural anesthesia requires a high level of technical proficiency to avoid serious complications and should always be performed by a trained anesthetist using a strict aseptic technique to reduce the risk of infection. There is currently no consensus regarding the relationship between breastfeeding and epidural analgesia during labor. The purpose of this review was to evaluate the effect of epidural analgesia on breastfeeding
Den organiserade lekens betydelse för det sociala samspelet mellan eleverna : En kvalitativ intervjustudie med fritidslärare.
No full textSyftet är att undersöka fritidslärares uppfattningar om sitt arbete med den organiserade leken med fokus på det sociala samspelet mellan eleverna i fritidshemsverksamheten. Den teoretiska utgångspunkten som studien utgår ifrån är det sociokulturella perspektivet, då teorin har ett tydligt fokus på interaktion mellan elever. Undersökningen är byggd på en kvalitativ metod i form av intervjuer med sju fritidslärare i fyra olika kommuner. Studiens resultat visar att majoriteten av fritidslärarna beskriver sitt arbete med den organiserade leken som aktivt i fritidshemsverksamheten. Däremot framkommer det i deras beskrivningar att deras arbete med den organiserade leken varierar. Antingen där leken styrs rakt av, till en viss del eller inte alls. De viktiga aspekterna i det sociala samspelet som uttrycks av fritidslärarna är samarbete, kommunikation, nya kompisband samt öppenhet för varandras tankar och åsikter. Dock visar det sig att i den organiserade leken ligger fokuset mest på de elever som anses vara svaga eller exkluderade ur fritidshemsverksamheten. Studiens slutsats är att fritidslärarna arbetar systematiskt med den organiserade leken i fritidshemsverksamheten, där det sociala samspelet står i fokus för de elever som anses vara svaga eller exkluderade. Den organiserade leken är ett pedagogiskt verktyg som fritidslärarna behöver ta vara på och arbeta aktivt med i fritidshemsverksamheten, utifrån ett fritidshemsperspektiv, där eleverna också får ett inflytande, där resterande elever inte glöms bort samt där fritidslärarna är delaktiga och engagerade
Large strain cruciform biaxial testing for FLC detection
No full textSelection of proper test method, specimen design and analysis method are key issues for studying formability of sheet metals and detection of their forming limit curves (FLC). Materials with complex microstructures may need an additional micro-mechanical investigation and accurate modelling. Cruciform biaxial test stands as an alternative to standard tests as it achieves frictionless, in-plane, multi-axial stress states with a single sample geometry. In this study, we introduce a small-scale (less than 10 cm) cruciform sample allowing micro-mechanical investigation at stress states ranging from plane strain to equibiaxial. With successful specimen design and surface finish, large forming limit strains are obtained at the test region of the sample. The large forming limit strains obtained by experiments are compared to the values obtained from Marciniak-Kuczynski (M-K) local necking model and Cockroft-Latham damage model. This comparison shows that the experimental limiting strains are beyond the theoretical values, approaching to the fracture strain of the two test materials: Al-6061-T6 aluminum alloy and DC-04 high formability steel
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