The Emery model for the HTS cuprates:oxygen role reexamined

Ivana Mrkonjic,Slaven Barisic 한국물리학회 2004 Current Applied Physics Vol.4 No.5

Mean field slave boson approximation is performed analytically on the extended Emery model for the CuO2 conducting plane.The model is parameterized by CuO charge transfer energyDpd, copperoxygen overlapt0, oxygenoxygen overlapt0and CoulombinteractionU on the copper site taken as innite. Special emphasis is placed on the role oft0 in the renormalization trends of theeective band parametersDpf and t, replacingDpd and t0, at small dopingd. It is shown that small, negativet0expands the range ofstability of the metallic phase, changing, through the higher order corrections int0, the nature of the metalinsulator transitionpoint. In the non-perturbative limit,t0modies qualitatively the renormalization ofDpf, making it saturate at the value of 4jt0j. Finitedoping suppresses the insulating state approximately symmetrically with respect to its sign. The regimeDpf . 4jt0j ts very well theARPES spectra of Y123, Bi2212 and LSCO and also explains, in the latter case, the evolution of the FS with doping accompanied bythe spectral weight transfer from the oxygen to the resonant band.

Gestational age - the most important factor of neonatal ponderal index

Damir Roje,Banovic Ivo,Tadin Ivica,Vucinovic Mirjana,Capkun Vesna,Barisic Aljosa,Vulic Marko,Mestrovic Zoran,Mimica Marko,Miletic Tomislav 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.2

Ponderal index (fetal weight in grams×100/ (fetal length in centimeters)3) (PI) is one of the anthropometric methods used to diagnose impaired fetal growth. Irrespective of the infant's position on the growth-weight-for-gestational age charts, PI is low in malnourished infants and high in obese ones. As fetal growth is affected by ethnicity, geographic location and socioeconomic status, we developed standards for neonatal PI, and assessed the effects of gestational age, sex and maternal parity. Data on 5798 newborns from singleton pregnancies born in the Department of Gynecology and Obstetrics, Split University Hospital, were retrospectively analyzed. Over a 15-month period in 2000/2001, 5596 newborns from 24 to 42 weeks of gestation were born. The other 202 newborns, born from 24 to 34 weeks of gestation in the ten year period, 1990-1999, were added because of the small number of preterm infants; ensuring a minimum of 30 to fill up at least infants in each gestational week. All mothers were of Caucasian origin. Stillbirths and fetuses with congenital malformations were excluded. The 10th, 50th and 90th percentiles, mean values with standard deviation of PI and the 10th, 50th, and 90th percentiles of birth weight and birth length are presented separately at weekly intervals. PI showed linear correlation with gestational age from 24 to 39 weeks, after witch the data plateaued. Sex and parity had no impact on PI in infants born between 24 and 37 weeks. Analysis of variance revealed PI to be significantly higher in female than in male newborns, and in multiparous than in nulliparous infants after 37 weeks of gestation. In conclusion, gestational age is the most important factor of neonatal PI. The effects of sex and parity on PI should only be considered in term neonates.

Optical and thermodynamic properties of the high-temperature superconductorHgBa2CuO4+δ

van Heumen, E.,Lortz, R.,Kuzmenko, A. B.,Carbone, F.,van der Marel, D.,Zhao, X.,Yu, G.,Cho, Y.,Barisic, N.,Greven, M.,Homes, C. C.,Dordevic, S. V. American Physical Society 2007 Physical review. B, Condensed matter and materials Vol.75 No.5

Water Length and Height Effects on the Earthquake Behavior of Arch Dam-Reservoir-Foundation Systems

Baris¸ Sevim,Ahmet Can Altuns¸ik,Alemdar Bayraktar,Mehmet Akköse,Yusuf Calayir 대한토목학회 2011 KSCE Journal of Civil Engineering Vol.15 No.2

In this study, water length and height effects on the earthquake behavior of arch dam-reservoir-foundation systems are purposed. The study can be classified into two parts. In the first part, in order to obtain a realistic 3D arch dam-reservoir-foundation model,water length effects on the behavior of the arch dam systems are investigated. For this purpose a double curvature arch dam is modeled by forming four different water lengths related to dam Height (H) as H, 2H, 3H and 4H. Each model is analyzed in time domain and the realistic model is obtained according to the analyses results. In the second part, water height effects on the behavior of the arch dam system are investigated. The arch dam obtained from first part of the study is modeled by forming four different water heights related to dam Height (H) as 0H, 0.33H, 0.66H and H. The behavior of the dam, reservoir and foundation are expressed in terms of displacements using Lagrangian approach. The foundation is taken into account as massless; behavior of reservoir is assumed to be linearly elastic, inviscid and irrotational. In this study, all systems are modeled by ANSYS finite element program and analyses are performed using IMPVALL/I-ELC180 component of Imperial Valley (1940) earthquake. Dynamic equations of motions are solved by using Newmark integration algorithm. It is seen that both water length and height affect the earthquake behavior of the arch dams considerably.

Investigation of water length effects on the modal behavior of a prototype arch dam using operational and analytical modal analyses

Baris Sevim,Alemdar Bayraktar,Ahmet Can Altunisik 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.37 No.6

This study determines the water length effects on the modal behavior of a prototype arch dam using Operational and Analytical Modal Analyses. Achievement of this purpose involves construction of a prototype arch dam-reservoir-foundation model under laboratory conditions. In the model, reservoir length was taken to be as much as three times the dam height. To determine the experimental dynamic characteristics of the arch dam using Operational Modal Analysis, ambient vibration tests were implemented for empty reservoir and three different reservoir water lengths. In the ambient vibration tests,the dam was vibrated by natural excitations provided from small impact effects and the response signals were measured using sensitive accelerometers. Operational Modal Analysis software process signals collected from the ambient vibration tests, and Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification techniques estimated modal parameters of the dams. To validate the experimental results, 3D finite element model of the prototype arch dam was modeled by ANSYS software for empty reservoir and three different reservoir water lengths, and dynamic characteristics of each model were determined analytically. At the end of the study, experimentally and analytically identified dynamic characteristics compared to each other. Also, changes on the natural frequencies along to water length are plotted as graphs. Results suggest that reservoir water complicates the modal behavior of the arch dam significantly.

Sustainable Implementation of Glass Manufacturing Waste and Geogrids in the Improvement of Fine-Grained Soils

Baris Mahmutluoglu,Baki Bagriacik 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.4

Recently, utilization of wastes has become increasingly important in aspects of sustainability and waste disposal. The aim of this study is to investigate the feasibility of using glass manufacturing waste (GMW) for the first time in the relevant literature, geogrids and GMW-geogrid reinforcement to increase the load bearing capacity of a clayey soil (CS) by large-scale model experiments. Initially, optimum water ratios were determined for different ratios of GMW and CS. Secondly, the optimum mixing ratio of GMW was determined. Next, the optimum soil depth improved with GMW and the optimum number of geogrids were investigated. Consequently, a bearing capacity ratio (BCR) increase of 2.23 times was acquired and the optimum mixture ratio was attained for 25% GMW addition. Improvement depth (Rd) and optimum number of geogrids (N) were obtained as 1.75D (D: diameter of the model foundation) and 3, respectively. The highest degree of improvement was reached for geogrids-GMW combination and a minimum waiting period of 7 days was advised in the sequel of such soil improvement work. Out of the observation of micro-structural analyses results, both physical and chemical interactions were encountered throughout the occurrence period of bearing capacity improvements.

CUSP FORMS IN S4 (r0 (79)) AND THE NUMBER OF REPRESENTATIONS OF POSITIVE INTEGERS BY SOME DIRECT SUM OF BINARY QUADRATIC FORMS WITH DISCRIMINANT -79

Baris Kendirli 대한수학회 2012 대한수학회보 Vol.49 No.3

A basis of a subspace of $S_{4}\left( \Gamma _{0}\left( 79\right) \right) $ is given and the formulas for the number of representations of positive integers by some direct sums of the quadratic forms $x_{1}^{2}+x_{1}x_{2}+20x_{2}^{2},$ $ 4x_{1}^{2}\pm x_{1}x_{2}+5x_{2}^{2},$ $2x_{1}^{2}\pm x_{1}x_{2}+10x_{2}^{2}$ are determined.

The Impact of Different Anthropometric Measures on Sustained Normotension, White Coat Hypertension, Masked Hypertension, and Sustained Hypertension in Patients with Type 2 Diabetes

Baris Afsar 대한내분비학회 2013 Endocrinology and metabolism Vol.28 No.3

Background: Many studies have aimed to determine whether body mass index (BMI), waist circumference (WC), or waist to hip ratio (WHR) best predicts hypertension in diabetic patients, with conflicting results. However, no study has examined the specific relationship between these anthropometric parameters with sustained normotension (SNT), white coat hypertension (WCHT),masked hypertension (MHT), and sustained hypertension (SHT) based on office and ambulatory blood pressure (BP) measurements in these patients.Methods: Patients with newly diagnosed type 2 diabetes underwent the following procedures: history taking, measurements of anthropometric parameters, office and ambulatory BP measurements, physical examination, laboratory analysis, and random and 24-hour urine analysis.Results: In total, there were 65 dippers and 37 nondipper patients. None of the anthropometric parameters were different between the dippers and the nondippers. There were 25 patients with SNT, 32 with WCHT, seven with MHT, and 38 with SHT. A comparison of anthropometric parameters between these four groups of patients showed that WC (P=0.016) and WHR (P=0.015) were different among all groups. According to regression analysis, only BMI was independently related with MHT (odds ratio [OR],1.373, P=0.022), whereas only WC has been associated with SHT (OR, 1.321, P=0.041).Conclusion: Among anthropometric parameters, only WC and WHR were different in SNT, WCHT, MHT, and SHT in newly diagnosed patients with type 2 diabetes.

Uncharacteristic foreign policy behavior: Sharon’s decision to withdraw from Gaza

Baris Kesgin 한국외국어대학교 국제지역연구센터 2019 International Area Studies Review Vol.22 No.1

When leaders depart from their long-held, publicly known policy positions, one possible explanation is changes in their personality. This paper inquires about one example: Ariel Sharon’s withdrawal from the Gaza Strip. Middle East observers long believed that Sharon was one of the last Israelis to cede any territory to Palestinians; alas, that became the decision to mark Sharon’s reign as prime minister. The “bulldozer” decided to evacuate the homes he had built. Assuming that Gaza disengagement implied a significant reassessment of Sharon’s previously held policy preferences, this paper asks if Sharon changed. Using leadership trait analysis, the paper develops two profiles of Sharon, before and during his premiership. Sharon is then profiled in three phases during his tenure: first term, second term until the announcement of disengagement, and until the end of his tenure. In making his decision, Sharon temporarily became a complex thinker, yet did not change in his distrust or develop empathy to the Palestinians. The findings suggest that leaders can experience a fundamental but temporary change to implement radically different decisions, and confirm that leaders’ traits are stable over time.

Structural, Mechanical and Magnetic Properties of Fe – 40-at.% Al Powders during Mechanical Alloying

Baris Avar,Musa Gogebakan,Sadan Ozcan,Suleyman Kerli 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.5

Nanocrystalline Fe – 40at.% Al alloy powders were prepared by using a mechanical alloying (MA)process with a planetary high-energy ball mill. The structural and the morphological propertiesof the powders were investigated by means of X-ray diffraction (XRD), and scanning electronmicroscopy (SEM), respectively. A disordered Fe(Al) solid solution with bcc crystal structure wasformed after 10 h of MA. Longer MA durations introduced ordering in the alloyed powders. Thefinal crystallite size was found to be as small as 5 nm whereas the internal strain was found toreach a final value of 2.1%. Also, the lattice parameter quickly increased to a maximum value of0.2926 nm at 30 h of MA, and then decreased to a value of 0.2873 at 80 h of MA. SEM resultsshowed variations in the shapes and the sizes of the particles in the powders at different stages. Furthermore, the microhardness values were found to increase gradually with increasing MA timedue to work hardening, grain refinement and solid-solution formation. Magnetic properties such asthe saturation magnetization (Ms) and the coercive field (Hc) were calculated from the hysteresisloops, and the results are presented as functions of the MA time.