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Nesir Huseyin,Anar Huseyin 한국수학교육학회 2023 純粹 및 應用數學 Vol.30 No.2
In this paper the control system described by Urysohn type integral equation is studied. It is assumed that control functions are integrally constrained. The trajectory of the system is defined as multivariable continuous function which satisfies the system's equation everywhere. It is shown that the set of trajectories is Lipschitz continuous with respect to the parameter which characterizes the bound of the control resource. An upper estimation for the diameter of the set of trajectories is obtained. The robustness of the trajectories with respect to the fast consumption of the remaining control resource is discussed. It is proved that every trajectory can be approximated by the trajectory obtained by full consumption of the control resource.
Two Cases of Multivessel Coronary Artery Ectasias Resulting in Acute Inferior Myocardial Infarction
Huseyin Gunduz,Saadet Demirtas,Mehmet Bulent Vatan,Mehmet Akif Cakar,Ramazan Akdemir 대한심장학회 2012 Korean Circulation Journal Vol.42 No.6
The incidence of multivessel coronary artery ectasias (CAEs) among patients undergoing coronary artery angiography is very rare. All three coronary vessels can be affected by CAE, but most patients have an isolated arterial ectasia, commonly the right coronary artery. In this report we present two cases with inferior myocardial infarction that was likely caused by thrombotic occlusion of CAEs.
On weighted generalization of opial type inequalities in two variables
Huseyin Budak,Mehmet Zeki Sarikaya,Artion Kashuri 강원경기수학회 2020 한국수학논문집 Vol.28 No.4
In this paper, we establish some weighted generalization of Opial type inequalities in two independent variables for two functions. We also obtain weighted Opial type inequalities by using $p$-norms. Special cases of our results reduce to the inequalities in earlier study.
Evaluation of Oxidant/Antioxidant Status and Cytokine Levels in Patients with Cannabis Use Disorder
Huseyin Bayazit,Salih Selek,Ibrahim Fatih Karababa,Erdinc Cicek,Nurten Aksoy 대한정신약물학회 2017 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.15 No.3
Objective: Cannabis is the most commonly used illegal drug in the world and it has several adverse effects such as anxiety, panic reactions and psychotic symptoms. In this study, we aimed to evaluate oxidant, anti-oxidant status and cytokine levels in individuals with cannabis use disorder. Methods: Thirty-four patients with cannabis use disorder and 34 healthy controls were enrolled to the study. Serum total antioxidant status, total oxidant status and cytokine levels were investigated in patients with cannabis use disorder and healthy controls. Results: We found increased levels of total oxidant status, oxidative stress index and interleukin (IL) 1, IL-6, IL-8, and tumor necrosis factor (TNF) in individuals with cannabis dependency compared to healthy people. When we compared total antioxidant status, IL-12, and interferon (IFN) levels, there were no differences in both groups. There was positive correlation between IL-6 and total oxidant status, oxidative stress index levels. Conclusion: The oxidative balance of individuals with cannabis use disorder was impaired and they had higher levels of IL-1, IL-6, IL-8, and TNF-, which is a pro-inflammatory cytokine and indicates increased inflammation compared to healthy controls. Thus, these findings suggest that cannabis increased inflammation and impaired the oxidative balance.
Effect of laparoscopic cholecystectomy techniques on postoperative pain
Huseyin Yilmaz,Oguzhan Arun,Seza Apiliogullari,Fahrettin Acar,Husnu Alptekin,Akın Calisir,Mustafa Sahin 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.85 No.4
Purpose: Minimally invasive surgical technics have benefits such as decreased pain, reduced surgical trauma, and increased potential to perform as day case surgery, and cost benefit. The primary aim of this prospective, randomized, controlled study was to compare the effects of single incision laparoscopic cholecystectomy (SILC) and conventional laparoscopic cholecystectomy (CLC) procedures regarding postoperative pain. Methods: Ninety adult patients undergoing elective laparoscopic cholecystectomy were included in the study. Patients were randomized to either SILC or CLC. Patient characteristics, postoperative abdominal and shoulder pain scores, rescue analgesic use, and intraoperative and early postoperative complications were recorded. Results: A total of 83 patients completed the study. Patient characteristics, postoperative abdominal and shoulder pain scores and rescue analgesic requirement were similar between each group except with the lower abdominal pain score in CLC group at 30th minute (P = 0.04). Wound infection was seen in 1 patient in each group. Nausea occurred in 13 of 43 patients (30%) in the SILC group and 8 of 40 patients (20%) in the CLC group (P > 0.05). Despite ondansetron treatment, 6 patients in SILC group and 7 patients in CLC group vomited (P > 0.05). Conclusion: In conclusion, in patients undergoing laparoscopic surgery, SILC or CLC techniques does not influence the postoperative pain and analgesic medication requirements. Our results also suggest that all laparoscopy patients suffer moderate and/or severe abdominal pain and nearly half of these patients also suffer from some form of shoulder pain.
Modafinil Dependence: A Case with Attention-Deficit/Hyperactivity Disorder
Huseyin Alacam,Omer Basay,Selim Tumkaya,Mehmet Mart,Gokce Kar 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.4
Modafinil is generally known as a drug with low addiction potential. There are few case reports in the literature demonstrating that Modafinil, stated being capable of diminishing symptoms of attention deficit/hyperactivity disorder (ADHD), causes addiction. In the present article a Modafinil addicted ADHD case, consuming usurious doses (5,000 mg/per day) of Modafinil is presented. The case presented to our psychiatry outpatient clinic due to: requirement of in taking high dose Modafinil in order to achieve the initial effects, difficulty in obtaining the drug, irritability, anxiousness, sleep irregularities, fatigue and unpleasant vivid dreams when he did not use the drug. It was realized that the patient, himself increased doses of Modafinil incrementally, in order to keep its effects on attention symptoms at the same level. It has to be kept in mind that ADHD patients can develop Modafinil addiction. It is necessary to carry out systemic studies on this subject.
Huseyin Atasoy,Esen Yildirim 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.7
In this study, electroencephalography signals recorded while participants were doing verbal and quantitative tasks, are classified. A dataset containing 1044 records obtained from 18 participants are used for subject-dependent classifications. Features are derived from phase locking values calculated between all channel pairs. Features are reduced before the classification process by using both analysis of variance and correlation based feature selection methods. Instances in the dataset are classified by using the nearest neighbor algorithm. An average classification accuracy of 92.35% is achieved over 18 participants. It is shown that phase locking value is distinctive especially when it is calculated on delta and gamma frequency bands measured between frontal and occipital regions.
Huseyin Kursat Celik,Gokhan Sakar 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.45 No.1
In the structural analysis of steel frames, joints are generally considered as rigid or hinged considering their moment transfer ability. However, the first studies conducted with the beginning of the 20th century showed that the joints do not actually fit these two definitions. In reality, a joint behaves between these two extreme points and is called semi-rigid. Including the actual state of the joint in the structural analysis provides significant economic advantages, so the subject is an intense field of study today. However, it does not find enough application area in practice. For this reason, a large-scale literature published from the first studies on the subject to the present has been examined within the scope of the study. Three important points have been identified in order to examine a joint realistically; modelling the load-displacement relationship, performing the structural analysis and how to design. Joint modelling methods were grouped under 7 main headings as analytical, empirical, mechanical, numerical, informational, hybrid and experimental. In addition to the moment-rotation, other important external load effects like axial force, shear and torsion were considered. Various evaluations were made to expand the practical application area of semirigid connections by examining analysis methods and design approaches. Dynamic behaviour was also included in the study, and besides column-beam connections, other important connection types such as beam-beam, column-beam-cross, base connection were also examined in this paper.
Tourette's syndrome manifests as chronic persistent cough
Huseyin Tan,Mustafa Buyukavci,Adem Arik 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.1
Tourette's syndrome (TS) is a neuropsychiatric disorder characterized by the presence of involuntary motor and phonic tics. Phonic tics can mimic respiratory system disorders such as asthma, and upper and lower respiratory system infections. We report on twins with chronic persistent cough (CPC): one of whom was followed as an asthmatic for a year and the other was diagnosed with recurrent respiratory tract infection. A careful history and neurologic assessment suggested that TS might be responsible for the first twin's symptoms but that the second one was probably in early TS. All the symptoms of the first patient diagnosed as TS showed a complete improvement with pharmacological treatment in two weeks. Since the history of CPC may in reality be TS, we recommend that TS should be considered in the differential diagnosis of pediatric CPC.