Effects of blast-induced random ground motions on the stochastic behaviour of industrial masonry chimneys

Kemal Haciefendioglu,Kurtulus Soyluk 국제구조공학회 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.43 No.6

This paper focuses on the stochastic response analysis of industrial masonry chimneys to surface blast-induced random ground motions by using a three dimensional finite element model. Underground blasts induce ground shocks on nearby structures. Depending on the distance between the explosion centre and the structure, masonry structures will be subjected to ground motions due to the surface explosions. Blast-induced random ground motions can be defined in terms of the power spectral density function and applied to each support point of the 3D finite element model of the industrial masonry system. In this paper, mainly a parametric study is conducted to estimate the effect of the blastinduced ground motions on the stochastic response of a chimney type masonry structure. With this purpose, different values of charge weight and distance from the charge centre are considered for the analyses of the chimney. The results of the study underline the remarkable effect of the surface blastinduced ground motions on the stochastic behaviour of industrial masonry type chimneys.

뙤약볕

Kemal, Yasar,홍범준 한국외국어대학 학도호국단 1976 외대 Vol.11 No.1

Assessment of endodontically treated teeth by using different radiographic methods: an ex vivo comparison between CBCT and other radiographic techniques

Kemal Özgür Demiralp,Kivanç Kamburŏglu,Kahraman Güngör,Selcen Yüksel,Gokcen Demiralp,Özlem Üçok 대한구강악안면방사선학회 2012 Imaging Science in Dentistry Vol.42 No.3

Purpose: To compare different radiographic methods for assessing endodontically treated teeth. Materials and Methods: Root canal treatments were applied in 120 extracted mandibular teeth, which were divided into four groups: (1) ideal root canal treatment (60 teeth), (2) insufficient lateral condensation (20 teeth), (3) root canals filled short of the apex (20 teeth), (4) overfilled root canal treatment (20 teeth). The teeth were imaged using intraoral film, panoramic film, digital intraoral systems (CCD and PSP), CCD obtained with portable X-ray source, digital panoramic, and CBCT images obtained at 0.3 mm3 and 0.2 mm3 voxel size. Images were evaluated separately by three observers, twice. Kappa coefficients were calculated. The percentage of correct readings obtained from each modality was calculated and compared using a t-test (p⁄0.05). Results: The intra-observer kappa for each observer ranged between 0.327 and 0.849. The inter-observer kappa for each observer for both readings ranged between 0.312 and 0.749. For the ideal root canal treatment group, CBCT with 0.2 mm3 voxel images revealed the best results. For insufficient lateral condensation, the best readings were found with periapical film followed by CCD and PSP. The assessment of teeth with root canals filled short of the apex showed the highest percentage of correct readings by CBCT and CCD. For the overfilled canal treatment group, PSP images and conventional periapical film radiographs had the best scores. Conclusion: CBCT was found to be successful in the assessment of teeth with ideal root canal treatment and teeth with canals filled short of the apex.

Taurine relaxes human radial artery through potassium channel opening action

Kemal Gokhan Ulusoy,Erkan Kaya,Kubilay Karabacak,Melik Seyrek,İbrahim Duvan,Vedat Yildirim,Oguzhan Yildiz 대한약리학회 2017 The Korean Journal of Physiology & Pharmacology Vol.21 No.6

The vascular actions and mechanisms of taurine were investigated in the isolated human radial artery (RA). RA rings were suspended in isolated organ baths and tension was recorded isometrically. First, a precontraction was achieved by adding potassium chloride (KCl, 45 mM) or serotonin (5-hydroxytryptamine, 5-HT, 30 mM) to organ baths. When the precontractions were stable, taurine (20, 40, 80 mM) was added cumulatively. Antagonistic effect of taurine on calcium chloride (10 mM to 10 mM) -induced contractions was investigated. Taurine-induced relaxations were also tested in the presence of the K+ channel inhibitors tetraethylammonium (1 mM), glibenclamide (10 mM) and 4-aminopyridine (1 mM). Taurine did not affect the basal tone but inhibited the contraction induced by 5-HT and KCl. Calcium chloride– induced contractions were significantly inhibited in the presence of taurine (20, 40, 80 mM) (p<0.05). The relaxation to taurine was inhibited by tetraethylammonium (p<0.05). However, glibenclamide and 4-aminopyridine did not affect taurine -induced relaxations. Present experiments show that taurine inhibits 5-HT and KCl -induced contractions in RA, and suggest that large conductance Ca2+-activated K+ channels may be involved in taurine –induced relaxation of RA.

Effect of the pulmonary recruitment maneuver on pain after laparoscopic gynecological oncologic surgery: a prospective randomized trial

Kemal Güngördük,Osman Aşıcıoğlu,İsa Aykut Özdemir 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.6

Objective: To evaluate the effectiveness of the pulmonary recruitment maneuver (PRM) at the end of the operation to decrease laparoscopy-induced abdominal or shoulder pain after gynecological oncologic surgery. Methods: In total, 113 women undergoing laparoscopic surgery for malignant or premalignant gynecological lesions were assigned randomly to two groups: the PRM group (the patient was placed in the Trendelenburg position (30°) and the PRM, consisting of two manual pulmonary inflations to a maximum pressure of 40 cmH2O) (n=54) and the control group (n=52). Postoperative shoulder and abdominal pain was assessed 12, 24, and 48 hours later using a visual analog scale (0–10). In addition, the incidence of post-discharge nausea and vomiting was recorded until 48 hours after discharge. Results: Postoperative shoulder pain at 12 and 24 hours was significantly less severe in the PRM group (2.2±0.5 and 2.0±0.4) than in the control group (4.0±0.5 and 3.9±0.4; both p<0.001). The PRM significantly reduced the severity of upper abdominal pain at 12 and 24 h compared with the control group (3.1±0.4 and 2.9±0.4 vs. 5.9±0.5 and 4.9±0.5; both p<0.001). The analgesic requirement during the postoperative period was similar in the two groups (control group, 78.8%; PRM group, 75.9%; p=0.719). Conclusion: The PRM effectively and safely reduced postoperative shoulder and upper abdominal pain levels in patients undergoing laparoscopic gynecological oncologic surgery. Trial registry at ClinicalTrials.gov, NCT01940042.

The Psychological Impact of COVID-19 Disease is more Severe on Intensive Care Unit Healthcare Providers: A Cross-sectional Study

Kemal Tolga Saracoglu,Tahsin Simsek,Selime Kahraman,Elif Bombaci,Özlem Sezen,Ayten Saracoglu,Recep Demirhan 대한정신약물학회 2020 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.18 No.4

Objective: Fear, anxiety, depression and sleep deprivation are common mental health disorders in COVID-19 disease. We aimed to analyse the risk for healthcare providers during COVID-19 pandemic in a university hospital. Methods: Anesthesiologists, nurses and nurse anesthetists were invited to fill out the survey. The survey was consist of questions from ‘’The Fear of COVID-19 Scale’’, ‘’Patient Health Questionnaire’’ and ‘’Pittsburgh Sleep Quality Index’’ (PSQI). Each question was worth a point. Results: The data of 208 participants were analyzed. Mean age was 29 ± 7.748 years, 72.1% were male, 67.3% were nurses, 62% were working in intensive care units, 38% were in hospital wards, 62% of all participants were living alone. Moderate depression was the most frequently detected outcome (n = 90, 43.3%). Mean The Fear of COVID-19 Scale for all participants was 18.56 ± 7.731. The mean PSQI of patients was 6.18 ± 4.356 with a 45.7% rate of poor sleep quality. PSQI was found significantly higher in nurses (7.1 ± 4.7, p = 0.000). Nurses were the group with the highest deterioration in sleep quality (53.6%, p = 0.003). The rate of moderate-to-severe depressive symptoms was significantly higher in intensive care unit nurses and physicians (p = 0.018). PSQI score was found significantly higher in intensive care unit nurses and physicians than hospital ward co-workers (7.02 ± 4.59 vs. 4.81 ± 3.57 respectively, p = 0.001). A significant positive correlation was observed between PSQI and The Fear of COVID-19 Scale total score in all patients (p < 0.005). Conclusion: Depression, anxiety, fear and sleep disorders may occur in healthcare workers during COVID-19 outbreak. Intensive care unit nurses were at highest risk.

Elevated Serum Neutrophil to Lymphocyte and Platelet to Lymphocyte Ratios Could be Useful in Lung Cancer Diagnosis

Kemal, Yasemin,Yucel, Idris,Ekiz, Kubilay,Demirag, Guzin,Yilmaz, Bahiddin,Teker, Fatih,Ozdemir, Meltem Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6

Background: Lung cancer (LC) is still the primary cause of cancer deaths worldwide, and late diagnosis is a major obstacle to improving lung cancer outcomes. Recently, elevated preoperative or pretreatment neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR) and mean platelet volume (MPV) detected in peripheral blood were identified as independent prognostic factors associated with poor survival with various cancers, including colon cancer, esophageal cancer, gastric cancer and breast cancer. Objective: The aim of this study was to examine whether MPV, NLR and PLR could be useful inflammatory markers to differentiate lung cancer patients from healthy controls. An investigation was also made of the relationship between these markers and other prognostic factors and histopathological subgroups. Materials and Methods: Retrospectively eighty-one lung cancer patients and 81 age-sexes matched healthy subjects included into the study. Patients with hypertension, hematological and renal disease, heart failure, chronic infection, hepatic disorder and other cancer were excluded from the study. The preoperative or pretreatment blood count data was obtained from the recorded computerized database. Results: NLR and PLR values were significantly higher in the LC patients compared to the healthy subjects.( NLR: 4.42 vs 2.45 p=0.001, PLR: 245.1 vs 148.2 p=0.002) MPV values were similar in both groups (7.7 vs 7.8). No statistically significant relationship was determined between these markers (MPV, NLR and PLR) and histopathological subgroups and TNM stages. Conclusions: NLR and PLR can be useful biomarkers in LC patients before treatment. Larger prospective studies are required to confirm these findings.

CARDAN POSITIONS IN THE LORENTZIAN PLANE

( Kemal Eren ),( Soley Ersoy ) 호남수학회 2018 호남수학학술지 Vol.40 No.1

In this paper, we study the instantaneous geometric properties of motion of rigid bodies in the Lorentzian plane. For this purpose we define Lorentzian form of Bottemas instantaneous invariants. In these regards, we obtain the necessary and sufficient condition of a Lorentzian plane to be at Cardan position with re-spect to these invariants.

The use of infrared thermography to detect the stages of estrus cycle and ovulation time in anatolian shepherd dogs

( Kemal Tuna Olgac ),( Ergun Akcay ),( Beste Cil ),( Burak Mehmet Ucar ),( Ali Daskın ) 한국축산학회(구 한국동물자원과학회) 2017 한국축산학회지 Vol.59 No.10

Background: The aim of the study is to evaluate the effectiveness of thermographic monitoring, using the temperature changes of perianal and perivulvar areas for the determination of estrus in Anatolian Shepherd bitches. Fifteen bitches were used in the study. Blood and vaginal smear samples were collected and thermographic monitoring of perianal and perivulvar areas were carried out starting from proestrus to early diestrus. Also, external signs of estrus were investigated. Smear samples were evaluated by light microscopy after Diff-Quik staining method and superficial and keratinized superficial cells were determined as percentage (S + KS%). Progesterone and luteinizing hormone measurements were done by radioimmunoassay. The difference in temperature between perianal and perivulvar areas was evaluated through thermographic images by FLIR ResearchIR Software. Results: According to the results obtained from the study, differences between progesterone and S + KS% were statistically significant (P < 0,05). Although temperature showed increase and decrease with progesterone and S + KS%, the differences were not important statistically (P > 0,05). Serum luteinizing hormone levels did not sign any difference (P > 0,05). Conclusions: As a result, thermographic monitoring alone is not enough for estrus detection in Anatolian Shepherd bitches. However, it can be used to assist the actual estrus detection technique in terms of providing some foreknowledge by evaluating the differences in temperature

Effects of Cyclotorsion Orientation and Magnitude in Eyes with Compound Myopic Astigmatism on the Compensation Capacity of WaveLight EX500 Photorefractive Keratectomy

Kemal Ozulken,Cagri Ilhan 대한안과학회 2019 Korean Journal of Ophthalmology Vol.33 No.5

Purpose: To investigate the clinical effects of different orientation and magnitude of cyclotorsion on the compensationcapacity of the WaveLight EX500 photorefractive keratectomy (PRK) platform. Methods: This retrospective study comprised 400 eyes of 200 patients who underwent bilateral simultaneousPRK due to compound myopic astigmatism. The subjects were separated according to the orientation of cyclotorsioninto incyclotorsion and excyclotorsion groups, and by the magnitude of cyclotorsion into group 1 (0.50to 2.50 degrees), group 2 (3.00 to 5.00 degrees), group 3 (5.50 to 7.50 degrees), and group 4 (8.00 to 9.50 degrees). Results: The mean magnitude of cyclotorsion was 3.50 ± 2.4 degrees (0.50 to 9.50 degrees) in the incyclotorsiongroup and 3.32 ± 2.3 degrees (0.50 to 9.50 degrees) in the excyclotorsion group (p = 0.617). The postoperativerefractive outcomes of the incyclotorsion and excyclotorsion groups were similar (p > 0.05 for all). Thepostoperative mean cylindrical refractive error was -0.32 ± 0.3 diopters (D, -1.25 to 0.00 D) in group 1, -0.47 ± 0.2D (-2.00 to 0.00 D) in group 2, -0.62 ± 0.2 D (-1.00 to -0.25 D) in group 3, and -0.91 ± 0.2 D (-1.50 to -0.50 D) ingroup 4 (p < 0.001). Preoperative cylindrical refractive error was positively correlated with magnitude of cyclotorsion(r = 0.125 and p = 0.013), which was also positively correlated with postoperative cylindrical refractiveerror (r = 0.600 and p < 0.001). Conclusions: Incyclotorsion and excyclotorsion can be equally compensable in the WaveLight EX500 PRKplatform for compound myopic astigmatism. A value of ≤2.50 degrees cyclotorsion magnitude was observedto be more compensable than higher degrees of cyclotorsion magnitude. Preoperative high astigmatism wasassociated with high cyclotorsion magnitude, which was also associated with a high degree of postoperativeastigmatism.