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https://www.readbyqxmd.com/read/28231476/evaluation-of-cognitive-performance-in-professional-divers-by-means-of-event-related-potentials-and-neuropsychology
#1
Mehmet Ergen, Atilla Uslu, Ozlem Caglar, Sukriye Akca-Kalem, Maide Cimsit, Hakan Gurvit
OBJECTIVE: We investigated whether professional air diving with no decompression illness causes any long-term changes in cognitive functions. METHODS: The all-male participants consisted of 18 healthy control (HC) volunteers and 32 divers. Divers were divided into two subgroups as moderate exposure group, Divers-I (DI) and extensive exposure group, Divers-II (DII). Participants were administered a comprehensive neuropsychological battery and event-related potentials (ERPs) were recorded while they performed auditory oddball task and visual continuous performance test (CPT)...
January 29, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28231293/photoacoustic-imaging-features-of-intraocular-tumors-retinoblastoma-and-uveal-melanoma
#2
Guan Xu, Yafang Xue, Zeynep Gürsel Özkurt, Naziha Slimani, Zizhong Hu, Xueding Wang, Kewen Xia, Teng Ma, Qifa Zhou, Hakan Demirci
The purpose of this study is to examine the capability of photoacoustic (PA) imaging (PAI) in assessing the unique molecular and architectural features in ocular tumors. A real-time PA and ultrasonography (US) parallel imaging system based on a research US platform was developed to examine retinoblastoma in mice in vivo and human retinoblastoma and uveal melanoma ex vivo. PA signals were generated by optical illumination at 720, 750, 800, 850, 900 and 950 nm delivered through a fiber optical bundle. The optical absorption spectra of the tumors were derived from the PA images...
2017: PloS One
https://www.readbyqxmd.com/read/28229525/bilateral-thalamic-lesions-a-pictorial-review
#3
Anıl Özgür, Kaan Esen, Hakan Kaleağası, Arda Yılmaz, Engin Kara, Altan Yıldız
Bithalamic lesions are uncommon, however, both focal and systemic disorders may present bilateral abnormalities in the thalamus in different acute and chronic clinical situations. Neuroimaging, in particular magnetic resonance imaging, plays an essential role in diagnostic approach. Imaging features such as signal alterations, diffusion restriction or contrast enhancement are helpful in characterization of these abnormalities. The location of the lesions may provide key information because some pathologies typically involve a certain part of the thalamus...
February 23, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28229356/symptoms-of-swallowing-anxiety-in-panic-disorder-patients-and-associated-psychopathologic-factors
#4
Ersin Budak, İbrahim Taymur, Sinay Önen, Bilgen Biçer Kanat, Önder Akdeniz, Hakan Demirci
AIM: The aim of this study was to investigate symptoms of swallowing difficulty in Panic Disorder (PD) patients and the factors associated with these symptoms. METHODS: In the pre-phase of the study, 22 PD patients who were treated in psychiatry outpatient clinics and who were found to have swallowing difficulty were evaluated. PD patients were asked to write about their thoughts, feelings and behaviors associated with swallowing difficulty. Later, these texts were examined and 41 expressions were identified in which patients described their swallowing difficulty...
February 22, 2017: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/28228962/conforming-with-current-regulation-in-turkey-regarding-the-freezing-of-oocytes-a-case-report-of-the-first-pregnancy-in-turkey-achieved-through-oocyte-vitrification
#5
Semra Kahraman, Kahraman Ulker, Caroline Pirkevi Çetinkaya, Yesim Kumtepe Colakoglu, Hakan K Yelke, Cihangir Yilanlioglu
OBJECTIVES: To present the first pregnancy achieved in Turkey with frozen-warmed oocytes in a case with previous nine unsuccessful assisted reproductive technology (ART) attempts. METHODS: The clinical follow-up of a 33-year-old female applying to our ART centre after a long and complicated history of infertility is described. RESULTS: In April 2013, the woman attempted our centre for her 10th ART trial. She informed us on oocyte pick-up (OPU) day that her husband had been hospitalized following a car crush in Albania and was unable to travel to our clinic to give a sperm sample...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28227582/reconfigurable-analog-classifier-for-knee-joint-rehabilitation
#6
Sahil Shah, Hakan Toreyin, Omer T Inan, Jennifer Hasler, Sahil Shah, Hakan Toreyin, Omer T Inan, Jennifer Hasler, Sahil Shah, Jennifer Hasler, Omer T Inan, Hakan Toreyin
We present a System-On-Chip Field Programmable Analog Array (FPAA) for analyzing and processing the signals off an accelerometer for a wearable joint health assessment device. FPAAs have been shown to compute with an efficiency of 1000 times, as well as area efficiencies of 100 times, more than digital solutions. This work presents a low power signal processing system which allows us to extract features from the output of the accelerometer. These features are used by the classifier, implemented using a vector matrix multiplication and a two output 1-winner-take-all, to detect flexion and extension cycles in the subject...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227560/a-dual-axis-single-proof-mass-angular-accelerometer-for-a-vestibular-prosthesis
#7
Yaesuk Jeong, Hakan Toreyin, Anosh Daruwalla, Pamela Bhatti, Farrokh Ayazi, Yaesuk Jeong, Hakan Toreyin, Anosh Daruwalla, Pamela Bhatti, Farrokh Ayazi, Farrokh Ayazi, Anosh Daruwalla, Yaesuk Jeong, Hakan Toreyin, Pamela Bhatti
A dual-axis single-proof-mass angular accelerometer has been developed for a vestibular prosthesis. Designed to sense head rotations both in the yaw and the pitch planes, the output of the inertial sensor may be coded as amplitude or rate modulated biphasic current pulses to stimulate vestibular nerves. Fabricated with a high aspect ratio commercial process, a sensor with small form factor (1.4 mm × 0.8 mm) is achieved with a scale factor of 95.5 μV/rad/sec(2) and 145.8 μV/rad/sec(2) in the yaw and the pitch planes, respectively...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227177/real-time-activity-classification-in-a-wearable-system-prototype-for-knee-health-assessment-via-joint-sounds
#8
Hakan Toreyin, Hyeon Ki Jeong, Sinan Hersek, Caitlin N Teague, Omer T Inan, Hakan Toreyin, Hyeon Ki Jeong, Sinan Hersek, Caitlin N Teague, Omer T Inan, Sinan Hersek, Caitlin N Teague, Omer T Inan, Hakan Toreyin, Hyeon Ki Jeong
An algorithm for performing activity classification for a joint health assessment system using acoustical emissions from the knee is presented. The algorithm was refined based on linear acceleration data from the shank and the thigh sampled at 100 Hz/ch and collected from eight healthy subjects performing unloaded flexion-extension and sit-to-stand motions. The algorithm was implemented on a field-programmable gate array (FPGA)-based processor and has been validated in realtime on a subject performing two minutes of activities consisting of flexion-extension, sit-to-stand, and other motions while standing...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225877/synthetic-cannabinoids-in-the-kidneys
#9
Alper Alp, Hakan Akdam, Banu Yılmaz Avcıoğlu, Sibel Ersan
Acute kidney injury is an important cause of mortality and morbidity today and can occur due to several reasons. As time, geographic regions, and living conditions change, various etiological agents arise with nephrotoxic effects. Awareness of such nephrotoxic effects has been raised with the increasing frequency of addictive substance use, especially among young people in society.
January 1, 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28225380/effect-of-fasting-on-24-h-blood-pressure-values-of-individuals-with-no-previous-history-of-hypertension
#10
Ayse Seker, Hakan Demirci, Gokhan Ocakoglu, Ufuk Aydin, Hakan Ucar, Gursel Yildiz, Ozen Yaman
OBJECTIVE: We aimed to analyze the difference in 24-h blood pressure values during Ramadan of fasting and nonfasting individuals with no previous history of hypertension. PATIENTS AND METHODS: This study was planned as a multicenter research study in the cities of Izmit, Zonguldak, Sivas, and Adana. The percentage changes in the blood pressure of the patients were calculated from their blood pressure measurements at 0 h while they were resting. A Food Frequency Questionnaire was filled out by all participants...
February 20, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28224278/the-need-of-prophylactic-central-lymph-node-dissection-is-controversial-in-terms-of-postoperative-thyroglobulin-follow-up-of-patients-with-cn0-papillary-thyroid-cancer
#11
Mehmet Hakan Korkmaz, Bülent Öcal, Güleser Saylam, Erman Çakal, Ömer Bayır, Esra Tutal, Emel Çadallı Tatar
PURPOSE: The objective of this study was to investigate whether prophylactic central lymph node dissection (pCLND) facilitates postoperative thyroglobulin (Tg) follow-up in the patients with papillary thyroid carcinoma (PTC). We also questioned whether radioactive iodine (RAI) remnant ablation provides any further advantage in this regard. METHODS: The records of patients with low-intermediate risk PTC who underwent either only total thyroidectomy (TT) or TT in conjunction with pCLND were reviewed...
February 21, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28223092/obestatin-improves-oxidative-brain-damage-and-memory-dysfunction-in-rats-induced-with-an-epileptic-seizure
#12
Türkan Koyuncuoğlu, Caner Vızdıklar, Doğan Üren, Hakan Yılmaz, Çağan Yıldırım, Sefa Semih Atal, Dilek Akakın, Elif Kervancıoğlu-Demirci, Meral Yüksel, Berrak Ç Yeğen
Obestatin was shown to alleviate renal, gastrointestinal and haemorrhage-induced brain injury in rats. In order to investigate the neuroprotective effects of obestatin on seizure-induced oxidative brain injury, an epileptic seizure was induced with a single intraperitoneal (i.p.) dose of pentylenetetrazole (PTZ, 45mg/kg) in male Wistar rats. Thirty minutes before the PTZ injection, rats were treated with either saline or obestatin (1μg/kg, i.p.). Seizure was video-taped and then evaluated by using Racine's scoring (0-5)...
February 18, 2017: Peptides
https://www.readbyqxmd.com/read/28219247/addressing-analytical-challenges-of-the-environmental-monitoring-for-the-water-framework-directive-erm-ce100-a-new-biota-certified-reference-material
#13
Ioannis Dosis, Marina Ricci, Laszlo Majoros, Roberto Lava, Håkan Emteborg, Andrea Held, Hendrik Emons
In the context of supporting the EU Member States in the implementation of the EU Water Framework Directive (WFD), a project for the production of a fish reference material (ERM-CE100) certified for its content of the two priority substances hexachlorobenzene (HCB) and hexachlorobutadiene (HCBD) was carried out at the Joint Research Centre (JRC) of the European Commission. The starting material was naturally contaminated Wels catfish (Silurus glanis), caught in the Ebro River (Spain). A novel approach for the processing of the fish was tested that resulted in a homogeneous and stable reference material in the form of a wet paste...
February 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28217167/russell-silver-syndrome-associated-with-low-conus-medullaris
#14
Larisa Gabor, Huseyin Canaz, Gokhan Canaz, Nursu Kara, Ibrahim Alatas, Hakan Bozkus
Russell-Silver syndrome is a rare heterogeneous disorder mainly characterized by intrauterine and postnatal growth retardation, craniofacial disproportion, clinodactyly, variation in urogenital development, and skeletal asymmetry. It is rare to come across tethered cord-associated Russell-Silver syndrome. We report a rare case of Russell-Silver syndrome associated with low conus medullaris in a 2-year-old patient with demonstrative phenotype. Magnetic resonance imaging indicated a low conus medullaris at the inferior border of the L3 vertebral body...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28216328/outcomes-of-prostate-cancer-screening-by-5-alpha-reductase-inhibitor-usage
#15
Teemu J Murtola, Anniina Virkku, Kirsi Talala, Ulf-Håkan Stenman, Kimmo Taari, Teuvo Lj Tammela, Anssi Auvinen
PURPOSE: Prostate cancer (PCa) screening with prostate-specific antigen (PSA) reduces PCa mortality, but leads to overdiagnosis of indolent PCa. Use of 5-alpha reductase inhibitors (5-ARIs) lowers PSA and in theory could affect performance of PSA-based screening. We evaluated outcomes of PCa screening among 5-ARI users. MATERIALS AND METHODS: The study was performed within the Finnish Randomized Study of Screening for Prostate Cancer. Of 80,454 men, 31,866 were randomized to be screened at four-year intervals during 1996-2004...
February 16, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28215270/decreased-cerebral-vasomotor-reactivity-in-patients-with-obstructive-sleep-apnea-syndrome
#16
Oguzhan Oz, Serdar Tasdemir, Hakan Akgun, Murat Erdem, Adem Balikci, Ahmet Cetiz, Mehmet Yucel, Umit Hidir Ulas, Seref Demirkaya, Yasar Kutukcu, Fuat Özgen
OBJECTIVE: In obstructive sleep apnea syndrome (OSAS), any of the activated neural, vascular, hemodynamic, metabolic, inflammatory, and thrombotic mechanisms may be related to increased cerebrovascular disease and risk of death; however, the possible pathophysiological process between obstructive sleep apnea syndrome and stroke has not been clearly explained. We hypothesize that alterations in vasomotor reactivity in patients may be responsible for their altered cerebral blood flow, and may contribute to the increased risk of ischemic stroke...
February 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28212454/clinical-comparison-of-screw-retained-and-screwless-morse-taper-implant-abutment-connections-one-year-postloading-results
#17
Esma Geckili, Onur Geckili, Hakan Bilhan, Omer Kutay, Tayfun Bilgin
PURPOSE: The purpose of this study was to clinically evaluate the screwless Morse taper implant-abutment connection type, in which the retention screw is totally eliminated, in terms of stability, success, periodontal parameters, and marginal bone levels after 1 year of function by comparing it with a passive fit internal implant-abutment connection, wherein a space exists between the matching components. MATERIALS AND METHODS: Each edentulous subject received an implant with a screwless Morse taper connection (MT) in the left canine area of the mandible and an implant with a screw-retained implant-abutment connection (SR) in the right canine area of the mandible...
February 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28211361/bias-dependent-spectral-tuning-in-inp-nanowire-based-photodetectors
#18
Vishal Jain, Magnus Heurlin, Mohammad Karimi, Laiq Hussain, Mahtab Aghaeipour, Ali Nowzari, Alexander Berg, Gustav Nylund, Federico Capasso, Lars Samuelson, Magnus T Borgström, Håkan Pettersson
Nanowire array ensembles contacted in a vertical geometry are extensively studied and considered strong candidates for next generations of industrial scale optoelectronics. Key challenges in this development deal with optimization of the doping profile of the nanowires and the interface between nanowires and transparent top contact. Here we report on photodetection characteristics associated with doping profile variations in InP nanowire array photodetectors. Bias-dependent tuning of the spectral shape of the responsivity is observed which is attributed to a Schottky-like contact at the nanowire-ITO interface...
March 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28210924/porphyrin-based-dye-sensitized-solar-cells-dsscs-a-review
#19
REVIEW
Özgül Birel, Said Nadeem, Hakan Duman
The current review aims to collect short information about photovoltaic performance and structure of porphyrin-based sensitizers used in dye-sensitized solar cells (DSSC). Sensitizer is the key component of the DSSC device. Structure of sensitizer is important to achieve high photovoltaic performance. Porphyrin derivatives are suitable for DSSC applications due to their thermal, electronic and photovoltaic properties. It describes some electrochemical and spectral properties as well as thestructure of porphyrin dyes used in dye based-solar cells...
February 16, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28210643/perception-of-health-problems-among-competitive-runners-a-qualitative-study-of-cognitive-appraisals-and-behavioral-responses
#20
Sara Jelvegård, Toomas Timpka, Victor Bargoria, Håkan Gauffin, Jenny Jacobsson
BACKGROUND: Approximately 2 of every 3 competitive runners sustain at least 1 health problem each season. Most of these problems are nontraumatic injuries with gradual onset. The main known risk indicator for sustaining a new running-related injury episode is a history of a previous injury, suggesting that behavioral habits are part of the causal mechanisms. PURPOSE: Identification of elements associated with purposeful interpretations of body perceptions and balanced behavioral responses may supply vital information for prevention of health problems in runners...
December 2016: Orthopaedic Journal of Sports Medicine
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