Self-Injury and Suicide Attempt in Relation with Trauma and Dissociation among Adolescents with Dissociative and Non-Dissociative Disorders

Filiz Kılıç,Murat Coşkun,Hasan Bozkurt,Ilyas Kaya,Salih Zoroǧlu 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.2

Objective: To explore the role of trauma and dissociation over self-injurious behaviors (SIB) and suicide attempts (SA) in adolescents. Methods: A total of 207 adolescents participated in the study. After conducting diagnostic interview, participants were divided into five groups as subjects with dissociative disorders (DD), attention deficit hyperactivity disorder (ADHD), major depressive disorder (MDD) and anxiety disorders (AD), and a control group (CG) without any psychiatric disorder. ADHD, MDD and AD groups were considered as non-dissociative disorders (non-DD group) in the present study. Results: There is no significant difference between groups in terms of number and age of the subjects (p>0.05). Among all participants SIB was reported in 32.2% of females (n=37) and 25% of males (n=23) while SA was reported in 29.6% of females (n=34) and 4.4% of males (n=4). Adolescents with DD were found to experience higher rates of SIB and SA than the other groups. Dissociation was the most important variable contributing to SIB and female gender was the most efficient variable for SA. Total trauma scores were also found to be significantly higher in DD group followed by non-DD and CG respectively. Conclusion: SIB and SA are complex behavioral problems which may be associated with many psychiatric factors. However higher level dissociation seems as an important mediating factor, even regardless of psychiatric diagnosis, in the development of SIB and SA. More research is needed to further explore the factors effective over SIB and SA in adolescents.

Seismic behavior of liquid storage tanks with 2D and 3D base isolation systems

Samet Kılıç,Bülent Akbaş,Jay Shen,Fabrizio Paolacci 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.83 No.5

In past major earthquakes (1994 Northridge, 1995 Kobe, Chi-Chi 1999, Kocaeli 1999), significant damages occurred in the liquid storage tanks. The basic failure patterns were observed to be the buckling of the tank wall and uplift of the anchorage system. The damages in the industrial facilities and nuclear power plants have caused the spread of toxic substances to the environment and significant fires. Seismic isolation can be used in liquid storage tanks to decouple the structure and decrease the structural demand in the superstructure in case of ground shaking. Previous studies on the use of seismic isolation systems on liquid storage tanks show that an isolation system reduces the impulsive response but might slightly increase the convective one. There is still a lack of understanding of the seismic response of seismically isolated liquid storage tanks considering the fluid-structure interaction. In this study, one broad tank, one medium tank, and one slender tank are selected and designed. Two- and three-dimensional elastomeric bearings are used as seismic isolation systems. The seismic performance of the tanks is then investigated through nonlinear dynamic time-history analyses. The effectiveness of each seismic isolation system on tanks’ performance was investigated. Isolator tension forces, modal analysis results, hydrodynamic stresses, strains, sloshing heights and base shear forces of the tanks are compared. The results show that the total base shear is lower in 3D-isolators compared to 2D-isolators. Even though the tank wall stresses, and strains are slightly higher in 3D-isolators, they are more efficient to prevent the tension problem.

Ductal Carcinoma In Situ Detected by Shear Wave Elastography within a Fibroadenoma

Fahrettin Kılıç,Fethi Emre Ustabaşıoğlu,Cesur Samancı,Ahmet Baş,Mehmet Velidedeoglu,Tülin Kılıçaslan,Fatih Aydogan,Mehmet Halit Yılmaz 한국유방암학회 2014 Journal of breast cancer Vol.17 No.2

Fibroadenoma is the most common breast tumor in women. Malignant transformation occurs rarely within fibroadenoma atolder ages. Clinicians, radiologists, and pathologists need to beaware of malignant transformation within fibroadenomas. Radiologicstudies play an important role in the diagnosis of fibroadenoma;however, radiologic findings are often nonspecific formalignancy and may appear completely benign. We detected anoccult ductal carcinoma in situ that originated inside a fibroadenomaby using shear wave elastography. We report shearwave elastography findings of ductal carcinoma in situ withinfibroadenoma and discuss the diagnostic role of this modality.

Swallowing and Aspiration: How Much Is Affected by the Number of Arytenoid Cartilages Remaining After Supracricoid Partial Laryngectomy?

Caner Kılıç,Ümit Tunçel,Metin Kaya,Ela Cömert,Samet Özlügedik 대한이비인후과학회 2017 Clinical and Experimental Otorhinolaryngology Vol.10 No.4

Objectives. The aim of this study was to compare the effect of the presence of one or two arytenoids on early/late period swallowing-aspiration functions. Methods. Supracricoid partial laryngectomy (SCPL) with the diagnosis of laryngeal cancer between 2012 and 2014 were retrospectively evaluated. The patients were categorized into two groups as follows: group I, patients who underwent SCPL with one arytenoid cartilage and group II, patients who underwent SCPL with two arytenoid cartilages. The time of decannulation and oral feeding onset, and swallowing-aspiration functions were evaluated and compared in the early nutritional period, first, and third months. Results. There was no significant correlation between decannulation time and swallowing-aspiration. The aspiration rates in group I and group II were similar and there was no significant difference in oral feeding onset and aspiration grades in the first and third months between both groups. Conclusion. We found similar oncological and functional outcomes in SCPL which protected one or two arytenoid cartilages. Therefore we suggest to be performed one arytenoid cartilage SCPL in selected patients who was advance stage and tumor volume over with larynx cancer.

Buckling Behavior of Nose Cone Type Steel Tanks Including Horizontal Imperfection

Mahmut Kılıç 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.4

Cylindrical shells have long been used as storage tanks in small or large sizes to store a variety of materials such as petroleum and derivatives. The radius to thickness ratios of these shells are classifi ed as 1000 and 2000 according to which designers and international codes are attracted to the buckling due to their collapse in buckling. Considerable research has been conducted on cylindrical reservoirs under the infl uence of a hydrostatic force or an internal vacuum. Due to the low wall thickness of the shell structures, it is possible to cause any deformation and disturbance on the wall surfaces. Due to a variety of errors during construction or assembly, the designed tanks are not ideally constructed and have some geometric error. Horizontal imperfection caused by continuous welding on the steel sheet’s edge to form the nose cone is the main concern of this work. The present paper attempts to discuss seven laboratory specimens under uniformed hydrostatic pressure with the 4t, 6t, 8t, 10t, 14t and 24t depths. The results revealed that there is a descent agreement between the results of the experiments conducted here and international codes and theories concerning with initial and overall buckling and collapse.

The Effect of Drug Use, Body Mass Index and Blood Pressure on Oxidative Stress Levels in Children and Adolescents with Attention Deficit and Hyperactivity Disorder

Dilşad Yıldız Miniksar(Dilşad Yıldız Miniksar ),Mehmet Akif Cansız(Mehmet Akif Cansız ),Ayşe Yeşim Göçmen(Ayşe Yeşim Göçmen ),Mahmut Kılıç(Mahmut Kılıç ),Ökkeş Hakan Miniksar(Ökkeş Hakan Miniksar ) 대한정신약물학회 2023 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.21 No.1

Objective: The aim of this study was to determine the correlation between clinical variables such as body mass index, blood pressure, drug use and oxidative stress level in children and adolescents with attention deficit and hyperactivity disorder (ADHD). Methods: Total oxidant status (TOS), total antioxidant status (TAS), oxidative stress index (OSI), malondialdehyde (MDA) and superoxide dismutase (SOD) activity were measured in the serum of 51 patients (38 male, 13 female) diagnosed with ADHD according to DSM-5 diagnostic criteria and 32 control subjects (12 male, 20 female). The Kiddie Schedule for Affective Disorders and Schizophrenia Present and Lifetime Version was applied to all participants. Results: The mean TOS, OSI, MDA values were determined to be significantly higher (p < 0.001) and the mean SOD value was lower in the ADHD group (p < 0.001). Multivariate regression analysis indicated significantly lower SOD and diastolic blood pressure values and significantly higher MDA in the ADHD group compared to the control group (p < 0.01). Low SOD (sensitivity 90.2%, specificity 78.0%) and high MDA (sensitivity 86.3%, specificity 81.2%) were determined to be predictive parameters for diagnosing ADHD. In univariate analysis, the mean TOS, OSI and SOD values were higher in ADHD patients under medication, while the mean TAS was higher in patients not using medication (p < 0.01). Only TOS was significant in multivariate logistic regression analysis (p < 0.01). Conclusion: The results of this study demonstrate that impaired oxidative balance may play a role in the etiology of ADHD.

The Relationship between Second-to-Fourth Digit Ratios, Attention-Deficit/Hyperactivity Disorder Symptoms, Aggression, and Intelligence Levels in Boys with Attention-Deficit/Hyperactivity Disorder

Işık Ümit,Kılıç Faruk,Aktepe Evrim,Tanrıtanır Bilal 대한신경정신의학회 2020 PSYCHIATRY INVESTIGATION Vol.17 No.6

Objective Observations of sex differences have led some scientists to doubt whether the neuroendocrine system is involved in attentiondeficit/hyperactivity disorder (ADHD) etiology. One of the interesting study subjects in this context is prenatal steroid hormone exposure. The aim of the present study was to replicate and extend previous work by addressing two research questions: 1) Are second-tofourth digit (2D:4D) ratios lower in ADHD than in controls? 2) Is there a correlation between 2D:4D ratios and symptoms of ADHD, aggression and intelligence scores in boys with ADHD?Methods The study included 100 treatment-naive male children diagnosed with ADHD and 55 healthy male children. We measured the ratios of 2D:4D and administered a Wechsler Intelligence Scale for Children-Revised to assess IQ scores, as well as behavioral rating scales, in children with ADHD and comparison individuals.Results We observed lower 2D:4D ratios in the right hand in ADHD in comparison to the control group. The left-hand ratios of 2D:4D, however, did not differ between ADHD and control groups. There were negative correlations between the left-hand 2D:4D ratios and the hyperactivity scores. However, no significant correlation was detected between right-hand 2D:4D ratios and the psychological questionnaire scores.Conclusion These results provide further evidence that fetal androgen exposure may contribute to the pathophysiology of ADHD, at least in boys.

Evaluation of the resin cement thicknesses and push-out bond strengths of circular and oval fiber posts in oval-shapes canals

Özgür Er,Kerem Kılıç,Halil İbrahim Kılınç,Tuğrul Aslan,Burak Sağsen 대한치과보철학회 2015 The Journal of Advanced Prosthodontics Vol.7 No.1

PURPOSE. The aim of this study was to evaluate whether the push-out bond strength varies between oval and circular fiber posts, and to examine the effect on the resin cement thicknesses around the posts. MATERIALS AND METHODS. Eighteen mandibular premolar roots were separated into two groups for oval and circular fiber posts systems. Post spaces were prepared and fiber posts were luted to the post spaces. Roots were cut horizontally to produce 1-mm-thick specimens. Resin cement thicknesses were determined with a metallographic optical microscope and push-out tests were done. RESULTS. No significant differences were observed in terms of push-out bond strength between the oval and circular fiber posts (P>.05) The resin cement thicknesses of the oval posts were greater than those of the circular posts group in the coronal, middle and apical specimens (P<.05). CONCLUSION. In the light of these results, it can be stated that resin cement thickness does not affect the push-out bond strength.

The Confinement Effect on the Buckling Performance of Cylindrical Tanks

Mahyar Maali,Mahmut Kılıç,Aydin Abdulkadir Cüneyt 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.2

Thin-walled cylindrical tanks are used in many civil engineering applications. In the past ten years, various methods have been used to confinement the cylindrical tanks; one of these methods is using CFRP. In this study, the tanks were confinement by using CFRP (The CFRP confinements were decided for 50 mm in width) in two different ways (Spiral (S) and horizontal (H)) at different distances (100,200 and 300 mm), and the effect of CFRP on the buckling capacity was examined. The models present how the spiral and horizontal CFRP confinement can improve buckling capacity. Results show that the gradual decreases in the initial, overall, and collapse buckling loads resulted from increasing CFRP strip distance of 100 mm to 300 mm in the two groups. Also, the results observed are generally by some of the international standards and the theories related to buckling.

A thermo-kinetic study on co-pyrolysis of oil shale and polyethylene terephthalate using TGA/FT-IR

Gamzenur Özsin,Murat Kılıç,Esin Apaydin-Varol,Ayşe Eren Pütün,Ersan Pütün 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.11

This study explored the effects of polyethylene terephthalate (PET) blending during the pyrolysis of oil shale (OS). Dynamic pyrolysis and co-pyrolysis tests at heating rates in the range from 5 to 40 oC/min were carried out using a thermogravimetric analyzer (TGA) coupled to a Fourier transform infrared spectrometer (FT-IR) to determine the kinetic parameters of the process and for online detection of evolved gasses. Pyrolytic decomposition of OS included a multi-stage decomposition process, while PET decomposed only in a single step. The kinetics of pyrolysis and co-pyrolysis was determined via model-free iso-conversional methods, namely Friedman, FWO, Starink, Vyazovkin, in a conversion degree range of 0.1-0.9. The kinetic models were validated with the obtained data to describe pyrolytic and copyrolytic degradation mechanisms, and the regression coefficients were between 0.9823 and 0.9999. The results showed that the activation energy of co-pyrolysis was evidently lower than that of PET or OS pyrolysis. This led to the conclusion that co-pyrolysis could be a potential method for obtaining shale oil due to the synergy between OS and PET.