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Search Results: 1 - 10 of 435 matches for " Damir Curic "
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Rapid prototyping for sling design optimization
Nermina Zaimovic-Uzunovic,Samir Lemes,Damir Curic,Alan Topcic
Computer Science , 2014,
Abstract: This paper deals with combination of two modern engineering methods in order to optimise the shape of a representative casting product. The product being analysed is a sling, which is used to attach pulling rope in timber transportation. The first step was 3D modelling and static stress/strain analysis using CAD/CAE software NX4. The slinger shape optimization was performed using Traction method, by means of software Optishape-TS. To define constraints for shape optimization, FEA software FEMAP was used. The mould pattern with optimized 3D shape was then prepared using Fused Deposition Modelling (FDM) Rapid prototyping method. The sling mass decreased by 20%, while signifficantly better stress distribution was achieved, with maximum stress 3.5 times less than initial value. The future researches should use 3D scanning technology in order to provide more accurate 3D model of initial part. Results of this research can be used by toolmakers in order to engage FEA/RP technology to design and manufacture lighter products with acceptable stress distribution.
The impact of a deep convection on sulfate transport and redistribution
V. Spiridonov,M. Curic
Atmospheric Chemistry and Physics Discussions , 2002,
Abstract: A three-dimensional compressible cloud model was used to simulate the processes related to dynamics, microphysics and chemistry of continental non-polluted and continental polluted clouds. The chemical components are formulated in terms of continuity equations for different chemical species in the aqueous phase within the cloud. Their evolution in this model came from not only by the processes of advection and turbulence transport, but also the chemical reactions and microphysical transfers. The model includes a method of kinetic uptake limitations. Gases with low solubility H* < 103 mol dm-3 atm-1 are in Henry's law equilibrium with temperature dependence of Henry's law coefficients. Seven pollutant groups are currently included in the chemistry parameterization scheme: S(IV), S(VI), (H2O2), (O3), N(V), (NH3), (CO2). The present model contains explicit treatment of SO2 and O3, a kinetic method of gas uptake as well as an improved microphysical parameterization scheme. The primary objective of this model is to study the impact of the deep convection on the pollutant transport, redistribution and deposition. It is done through chemical reactions, oxidation, scavenging of aerosol particles and transfer via microphysical transitions among water categories. Two base run simulation parameters are used to initialize the model. The first model run is for the 6 July 1995 event, characterized by intensive convective cloud activity and a large amount of precipitation, manifested as a flashflood. The second one is related to transboundary dust transport and sulfate wet deposition. The chemical field initialization is based on the vertical distribution profiles of gases and aerosols for continental non-polluted and continental polluted background. The study has revealed the importance of considering interactions between dynamics, microphysics and cloud chemistry. Deep convection in the first analyzed case generates rapid upward and downward transport of pollutants. It stimulates the impact of scavenging processes and microphysical conversions, pollutant redistribution and wet deposition. We find good agreement between calculated and observed rainfall, pH, sulfate concentration and wet deposition, in the second simulated case. Aerosol particles partially dissolved in precipitation changed their qualitative and quantitative features, acidity and increment of all chemical components. A lot of sensitivity tests of the terms included in the chemistry parameterization scheme indicate that assumption of Henry's law equilibrium leads to a factor 2 to 3 underestimate of a so
A Three-Dimensional Simulation of Supercell Convective Storm
V. Spiridonov,Z. Dimitrovski,M. Curic
Advances in Meteorology , 2010, DOI: 10.1155/2010/234731
Abstract: A supercell convective storm is simulated by using a cloud-resolving model. Numerical experiments have been performed in 3D by using the same domain size, with a different spatial and temporal resolution of the model. High-resolution cloud model has been shown to represent convective processing quite well. Running the model in a high-resolution mode gives a more realistic view of the life cycle of convective storm, internal structure, and storm behavior. The storm structure and evolutionary properties are evaluated by comparing the modeled radar reflectivity to the observed radar reflectivity. The comparative analysis between physical parameters shows good agreement among both model runs and compares well with observations, especially using a fine spatial resolution. The lack of measurements of these species in the convective outflow region does not allow us to evaluate the model results with observations. A three-dimensional simulation using higher grid resolution mode exhibits interesting features which include a double vortex circulation, cell splitting, and secondary cell formation.
NEWS ON THE SURGICAL TREATMENT OF OBESITY
Laura Curic,F. Bassetto,Carmen Vulpoi
Jurnalul de Chirurgie , 2012,
Abstract: BACKGROUND:Liposuction is one of the most common elective surgical procedures in the U.S. and is supposed to be on the increase. AIM: The present study analyzes the effects of the surgical removal of subcutaneous adipose tissue by ultrasound-assisted megalipoplasty (UAM) on BMI (body mass index), weight variation and anthropometric measurements in obese people. METHODS: Thirty premenopausal obese women underwent UAM, superwet technique. The mean aspirate volume was 17.5 L (range 9.2-26.3l). BMI, weight and anthropometric measurements were determined before and 1 day, 3 days, 6 months and 1year after the procedure. RESULTS: UAM reduced all parameters in the first six months after surgery, without further important changes in thefollowing six months. No major complications were noted in our study. Minor complications were present in 13 patients: seroma (10 patients), skin necrosis (2 patients), burns (1patient) whichwere solved favorably. CONCLUSIONS: Our study demonstrates that UAM is safe andrepresents a reliable alternative to bariatric surgery, universally accepted in the treatment of obesity. It should be considered only if a dedicated team for the treatment of obesity exists (nutritionist, plastic surgeon, general surgeon, anesthesiologist and psychologist). UAM, by aesthetic benefits to patients (removing a large amount of fat with minimal blood loss), restored all patients satisfaction and esteem.
The effects of ultrasound-assisted megaliposuction on body mass index and seric leptin level in obese women- case report]
Laura Maria Curic,F. Bassetto,Carmen Vulpoi
Jurnalul de Chirurgie , 2012,
Abstract: INTRODUCTION: Numerous studies in the literature shows that liposuction has a functional role (removal of large quantities of fat would lead to an increase lipase activity, leading to a continued reduction in body weight, linked to an inhibition of the hunger center through a feedback mechanism). Nowadays, liposuction is performed not only for aesthetic reasons, but also in therapy to improve quality of life of obese patients. CASE REPORT: We exemplify the effects of the surgical removal of subcutaneous adipose tissue by ultrasound-assisted megaliposuction (UAM) on body mass index (BMI) and seric leptin level in a 53 years old premenopausal obese women. UAM reduced both parameters in the first six months after surgery, without further important changes in the following six months. Leptin levels transiently increased after UAM and then declined according to fat mass reduction. Leptin levels were directly associated with BMI, except postoperative inflammatory phase. Only one minor complication was noted, a burn which was solved favorably. CONCLUSIONS: The results are consistent with existing data in literature and in addition is a response to the dilemmas and conflicting statements about this issue.
A Three-Dimensional Simulation of Supercell Convective Storm
V. Spiridonov,Z. Dimitrovski,M. Curic
Advances in Meteorology , 2010, DOI: 10.1155/2010/234731
Abstract: A supercell convective storm is simulated by using a cloud-resolving model. Numerical experiments have been performed in 3D by using the same domain size, with a different spatial and temporal resolution of the model. High-resolution cloud model has been shown to represent convective processing quite well. Running the model in a high-resolution mode gives a more realistic view of the life cycle of convective storm, internal structure, and storm behavior. The storm structure and evolutionary properties are evaluated by comparing the modeled radar reflectivity to the observed radar reflectivity. The comparative analysis between physical parameters shows good agreement among both model runs and compares well with observations, especially using a fine spatial resolution. The lack of measurements of these species in the convective outflow region does not allow us to evaluate the model results with observations. A three-dimensional simulation using higher grid resolution mode exhibits interesting features which include a double vortex circulation, cell splitting, and secondary cell formation. 1. Introduction Convective clouds and storms represent one of the most important and challenging problems for forecasters. The severe local storms and deep convective clouds are characterized by the enhanced transport of heat and moisture in the upper layers, very strong self-organized flow fields, very complex microphysical transformations and stratospheric penetrations, and rapid evolution and dissipation processes. The precipitation processes are activated in very limited time interval and space, and their intensities are manifested by large natural variability. Supercell storms are perhaps the most violent of all storm types and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes. They are most common during the spring across the mid-latitudes when moderate-to-strong atmospheric wind fields, vertical wind shear, and instability are present. The degree and vertical distribution of moisture, instability, lift, and especially wind shear have a profound influence on convective storm type. It is generally recognized that the environmental buoyancy and vertical wind shear have important effect on the characteristics of convective storms. Much of our understanding of the sensitivity of convective storms to these environment parameters has been derived from modeling studies that tested a variety of, but often idealized, environmental conditions. Numerical cloud models have contributed substantially to our understanding of supercell storms. A
FAKE SPAWNING OF THE MUSKY OCTOPUS, Eledone moschata (LAMARCK, 1798), IN EXPERIMENTAL CONDITIONS
Damir Vali?
Ribarstvo : Croatian Journal of Fisheries , 2005,
Abstract: Musky octopus, Eledone moschata is widespread in the Mediterranean on various bottom types. Although it is common in fishery landings its ecology is still poorly known. The life span of this species is up to two years. Females can spawn in wide period, ranging from couple of days to few months. This study was designed as an attempt to culture octopus paralarvae and to determine food requirements of the newly hatched individuals. Fake spawning in experimental conditions was observed. Condition of eggs in the laboratory together with behaviour of the female during this experiment is described.
Financial sector and economic growth in the Republic of Croatia 1995-2005
Novotny Damir
Economic Annals , 2006, DOI: 10.2298/eka0668109n
Abstract: Financial sector in the Republic of Croatia had a strong growth between 1995 2005.g. Liberalization of financial sector in 1999 led to an increase in bank foreign debt, which resulted in a strong increase in foreign currency reserves and appreciation of the national currency. The growth of the financial sector and credit expansion have been allocated in favour of private and public consumption, but not in industry investments. GDP growth didn't have the same momentum as financial aggregates. Economic growth, after a contraction in 1999 was within the average of global economic growth. Relying on neoclassical growth model, government and central bank didn't put in place the needed set of pro-active policies. Factor allocation was solely through private bank channels financing private consumption. If the sustainable economic growth and new employment are to be major macroeconomic goals, a new macroeconomic paradigm as combination of neclassical and neokeynesians approach will be needed.
The concept of territorial organisation of Adriatic Croatia
Damir Maga?
Geoadria , 2011,
Abstract: In this work, the author’s starting point is a maximum quality and functional territorial organisation of Croatia, especially its littoral area. Adriatic Croatia, as well as Eastern (Pannonian) and Northwestern Croatia, is one of the three defined (future) Euroregions NUTS II in Croatia. It was suggested in its current territorial coverage by the Republic of Croatia, and accepted by Eurostat in 2007. It includes all littoral counties (7) of Croatia, covering 24.7 thousand km2 with 1.4 million inhabitants (2011). The paper discusses a possible differentiation of this strategic littoral Adriatic area on three functional (gravitational) regions of the third level (NUTS III) according to the criteria of the Croatian Government on efficient decentralisation and new regionalisation of Croatia. Namely, some littoral counties do not meet the European demographic criterion for statistical NUTS III region (150-800 thousand inhabitants) although, in general, Croatian counties meet this criterion. That is why the author, applying demographic, geographic, economic, administrative and other criteria, stresses the need for defining the demographically maximally coordinated three nodal-functional, i.e., gravitational regions with their centres in Rijeka, Zadar and Split. So, the Rijeka region would potentially cover Istria, Kvarner and Gorski Kotar areas with 505,000 inhabitants (2011), Zadar region would cover North Dalmatian and Lika areas with 330,000 inhabitants, and Split region would include Middle Dalmatian and Dubrovnik (South Dalmatian) areas with 578,000 inhabitants. The area of Lika is functionally and economically most optimally oriented towards Zadar, with regard to new processes of highway linking and the recent fast development of Zadar.
Slovenian-Croatian boundary: backgrounds of boundary-making and boundary-breaking in Istria regarding the contemporary boundary dispute
Damir Josipovi?
Geoadria , 2012,
Abstract: Boundary-making in Istria is an old undertaking. It has actually never ceasesed, not even today. Istrian peninsula has thus undergone substantial boundary shifts during the last couple of centuries (especially after the Venetian demise in 1797). But Istria carries its worldwide fame also due to one of probably the harshest disputes on the post-war European grounds – the Trieste territory dispute. In author's perspective, this dispute is one of the four main corner-stones of the current Slovenian-Croatian boundary dispute. The remaining three include the Kozler's boundary around Dragonja (Rokava) River, the ungraspable notions of Austrian censuses in Istria, and the narratives of partisan settlements on military jurisdiction. However, there are other very important aspects which significantly shaped the development of the dispute, but we will focus at assessing the importance of the aforementioned ones. In this sense, the analysis of the effects of the outcome of the Trieste dispute and its implications to the contemporary interstate dispute is set forth. By unveiling its material and consequently its psychological effects upon the contemporary bilateral relations, its analyses simultaneously reveals backgrounds of never answered question, why Kozler's proposed linguistic boundary around Dragonja (Rokava) River turned out to become a boundary of national character. Though nowadays disputed, there is absolutely no chance for both involved parties to substantially draw away from once decisively drawn line of a layman. Despite the fierce battle of words in Slovenian public media on whether should the interstate boundary be placed on Mirna (Quieto) or Dragonja Rivers, it will be argued here that the actual choice of the Valley of Dragonja as a boundary is by all means Slovenian. The arguments are based on extensive analyses of cartographic materials, relevant literature, documents, and statistical data.
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