bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic Characteristics of Different Aspect Ratios of Small Hydraulic Orifices Using a Pressure Square Wave Generator
Authors: Wu Y. C. , Fan P. S. , Tsung T. T.
Published: January 2008

This study examines the dynamic characteristics of different aspect ratios (length/diameter, L/D) of small hydraulic orifices. A homemade pressure square wave generator (PSWG) was employed to excite inlet pressure square waves The responses of time-domain and frequency-domain were measured by piezoelectric pressure sensors and a Spectrum Analyzer. Experimental conditions: At a pressure of 2 MPa, frequency was adjusted by the frequency converter to 200 Hz, orifice diameters range from 0.5 to 2.0 mm and lengths are from 0.5 to 3 mm (aspect ratios from 0.25 to 6). In the wave form of the time-domain response, a square waveform at the inlet of the orifice becomes a triangular waveform after the hydraulic fluid flows through the orifice. The pressure-drop via the orifice results in a delay of pressure increase and decrease. Results show a considerable pressure decay of over 90 % on the large aspect ratio of small orifices. For characteristics of dynamic control, it is necessary to improve hydraulic technology to reach the high precision field.
Nonvirally Engineered Porcine Adipose Tissue-Derived Stem Cells: Use in Posterior Spinal Fusion
Authors: Sheyn Dima , Pelled Gadi , Zilberman Yoram , Talasazan Farahnaz , Frank Jonathan M. , Gazit Dan , Gazit Zulma
Published: January 2008

Multiple factors alter intervertebral disc volume, structure, shape, composition, and biomechanical properties, often leading to low back pain. Spinal fusion is frequently performed to treat this problem. We recently published results of our investigation of a novel system of in vivo bone formation, in which we used nonvirally nucleofected human mesenchymal stem cells that overexpress a bone morphogenetic protein gene. We hypothesized that primary porcine adipose tissue-derived stem cells (ASCs) nucleofected with plasmid containing recombinant human bone morphogenetic protein-6 (rhBMP-6) could induce bone formation and achieve spinal fusion in vivo. Primary ASCs were isolated from freshly harvested porcine adipose tissue. Overexpression of rhBMP-6 was achieved ex vivo by using a nucleofection technique. Transfection efficiency was monitored by assessing a parallel transfection involving an enhanced green fluorescent protein reporter gene and flow cytometry analysis. rhBMP-6 protein secreted by the cells was measured by performing an enzyme-linked immunosorbent assay. Genetically engineered cells were injected into the lumbar paravertebral muscle in immunodeficient mice. In vivo bone formation was monitored by a quantitative microcomputed tomography (μCT). The animals were euthanized 5 weeks postinjection, and spinal fusion was evaluated using in vitro μCT and histological analysis. We found formation of a large bone mass adjacent to the lumbar area, which produced posterior spinal fusion of two to four vertebrae. Our data demonstrate that efficient bone formation and spinal fusion can be achieved using ex vivo, nonvirally transfected primary ASCs. These results could pave the way to a novel biological solution for spine treatment.

Disclosure of potential conflicts of interest is found at the end of this article.
A practical design approach for piles with negative friction
Authors: Poulos H. G.
Published: January 2008

Misconceptions remain in the minds of some pile designers when negative friction effects have to be taken into account. This paper outlines some of these misconceptions, and then describes a relatively straightforward approach for designing piles subjected to negative friction. This approach relies on the consideration of the portion of the pile that is located in the ‘stable’ zone—that is, that part of the ground profile that is not subjected to ground settlements. By designing this portion of the pile to have adequate length and strength, the key design requirements in relation to geotechnical capacity, structural capacity and pile head settlement can be satisfied. The case where the ground settlements extend to a large depth is also described briefly, and it is shown that it may then be prudent to design the piles to settle with the ground, rather than attempt to restrain them from settlement. Some other issues that can affect the response of piles to ground settlements are examined, including the presence of residual stresses in the pile, live load application and group effects. It is demonstrated that preloading a pile has the potential to reduce the axial force induced in the pile by the ground settlements.
Investigation of isolation conditions and ion-exchange purification of protein coagulation components from common bean seed
Authors: Antov Mirjana , Sciban Marina , Adamovic Slavica , Klasnja Mile
Published: January 2008

Investigation of an extraction procedure of protein coagulants from common bean seed regarding concentration of NaCl and pH was performed. High values of protein concentration and coagulation activity in crude extract (9.19 g/l and 23.9%, respectively) were obtained when the extraction was performed using 0.5 mol/l NaCl and water as solvent, which represents an advantage for economic and environmental reasons. Crude extract of common bean seed was purified by precipitation at two different percentages of (NH4)2SO4 saturation, followed by batch ion-exchange chromatography. The highest obtained coagulation activity, 45%, was determined in fraction that was eluated at 1.75 mol/l NaCl from resin loaded with proteins precipitated upon 80-100% (NH4)2SO4 saturation. High values of coagulation activity showed by some eluates suggest their application as natural coagulant for water purification. .
Benefits of mesopores in nanocristalline Pd/SnO2 catalysts for nitrate hydrogenation
Authors: Kovacevic Marijana , Kis Erne , Boskovic Goran
Published: January 2008

Mesoporous nanocristalline SnO2 supports were synthesized by a modified sol-gel method starting from SnCl2?2H2O and citric acid at pH 2.0 and 9.5. Noble metal was introduced via wet impregnation using PdCl2 as active phase precursor. Catalysts activities in water denitration were correlated with their textural, structural and morphological properties using LTNA (BET), XRD and SEM/EDS analysis. Lower pH value during the catalyst synthesis resulted in a final material characterized with more developed porosity and higher surface area. Although both catalysts turned out to be tailored from nanoscale crystallites, higher pore fraction of mesopores resulting from the synthesis in acidic conditions, was found to be responsible for superior catalytic behavior.
Exo-polygalacturonase production by Penicillium roqueforti on pumpkin oil cake in solid state fermentation
Authors: Pericin Draginja , Madjarev Senka , Radulovic Ljiljana , Skrinjar Marija
Published: January 2008

The feasibility of using pumpkin oil cake (PuOC), individual and in combination with wheat bran (WB), as substrate for the production of Exo-polygalacturonase (Exo-p) by starter culture Penicillium roqueforti in solid state fermentation (SSF) has been evaluated. The kinetics of enzyme production was investigated using PuOC alone in the range from 13 to 168 h, with moisture contents varying from 44% the ability to grow and produce Exo-p activity on this substrate, reaching a maximum value of 1451.75 U/g.d.w PuOC by the 5th day of fermentation. Fermentation experiments indicated that the water activity (aw) influenced the enzyme production. A medium with aw 0.932 and the fermentation time of 5 days were selected, as these conditions resulted in the highest pectolytic activity and were used for further investigation. A next step in this research was to examine the effect of the substrate combination, PuOC with wheat bran (WB), in different ratios. The addition of WB as carbon sources was found to have a significant influence on the enzymes yields. Exo-p activities were the highest with initial water activity of a w 0.932 and PuOC supplementation with WB (1:0.67).
Effect of different conditions on Cu(II) and Cr(VI) biosorption by dried waste tea fungal biomass
Authors: Razmovski Radojka , Sciban Marina
Published: January 2008

Some industrial wastewaters contain high quantities of non-toxic salts besides heavy metal ions. The presence of salt ions leads to a high ionic strength of water, which may significantly affect the performance of the biosorption process, so that the effect of salts on the biosorption of heavy metal ions should be investigated. In this study the effect of different salts concentrations (0.1; 0.5 and 1 mol L-1) and dosage of tea fungal biomass (0.15; 0.25 and 0.5 g L-1) dried at different temperatures: 20?C, 70?C, 80?C, 105?C and 125?C on Cu(II) and Cr(VI) biosorption was studied in a batch system. Biosorption at an ionic strength of 0.1 mol L-1 of all salts investigated had a decreasing effect on Cu(II) and Cr(VI) removal. It was observed that (NH4)2SO4 at the concentrations of 0.5 mol L-1 and 1 mol L-1 was more efficient than other salts for metal ions removal. In case of Cr(VI) the most efficient removal was obtained for the water with K2SO4 at a concentration of 0.5 mol L-1. The lowest biosorbent dosage (0.15 g L-1 tea fungal biomass dried at 20?C in the case of Cu(II) biosorption and at 80?C in the case of Cr(VI) biosorption) resulted in the highest metal uptake of 38 mg g-1 in case of Cu(II) and 33 mg g-1 in case of Cr(VI).
Antimicrobial and antioxidant activity of lemon balm Kombucha
Authors: Velicanski Aleksandra , Cvetkovic Dragoljub , Markov Sinisa , Tumbas Vesna , Savatovic Sladjana
Published: January 2008

Kombucha is a beverage traditionally produced by metabolic activity of yeasts and acetic acid bacteria. The antimicrobial activity of lemon balm kombucha as well as of particular control samples was determined by agar-well diffusion method. Antioxidant activity on stable 1,1-diphenyl-2-picrylhydrazyl radicals of lemon balm kombucha and lemon balm tea was determined by electron spin resonance spectroscopy. Acetic acid, Kombucha samples and heat-denaturated kombucha showed significant antimicrobial activity against bacteria. However, there was no activity against yeasts and moulds. Kombucha showed higher antioxidant activity than tea sample for all applied sample volumes.
Immobilization of penicillin acylase from Escherichia coli on commercial sepabeads EC-EP carrier
Authors: Zuza Milena , Siler-Marinkovic Slavica , Knezevic Zorica
Published: January 2008

This paper describes the covalent immobilization of penicillin G acylase from Escherichia coli on sepabeads EC-EP, an epoxy-activated polymethacrylic carrier and kinetic properties of the immobilized enzyme. The selected enzyme belongs to a class of biocatalysts whose industrial interest is due to their versatility to mediate hydrolysis of penicillins and semi-synthetic ?-lactam antibiotics synthesis reactions. About 2.7 mg of the pure enzyme was immobilized onto each gram of sepabeads with an enzyme coupling yield of 96.9%. However, it seems that the activity coupling yield is not correlated with the amount of enzyme bound and the maximum yield of 89.4% can be achieved working at low enzyme loading (0.14 mg g-1). Immobilization of the penicillin acylase resulted in slightly different pH activity profile and temperature optima, indicating that the immobilization by this method imparted structural and conformational stability of this enzyme. It appears that both free and immobilized penicillin acylase followed simple Michaelis-Menten kinetics, implying the same reaction mechanism in both systems.
Why still philosophy?: Once again
Authors: Krstic Predrag
Published: January 2008

The intention of this paper is to revisit, once again the question asked by Adorno and Habermas and other contemporary thinkers under different headings few decades ago. The author is suggesting that nowadays philosophy requires a final departure from the idea of having single and perennial face, and that this would not only allow, but also enable philosophy to test its various faces freely, that is, without norm or limit set in advance. At the same time, by creating such ?liberal? climate philosophy would no longer be frightened by the possible answer, and hence would no longer dramatize the very question of ?why still??. Even if philosophy turns out to be far less than the mission it once bestowed upon itself.
Things talked about while we remain silence and things we’re silence about while talking: The starting assumptions for an anthropology of silence about the nearest past
Authors: Djeric Gordana
Published: January 2008

Wars of the last decade of the 20th century in former Yugoslavia have brought the whole region into the center of media attention and, accordingly, have aroused interest of the western academic theory. Since the latest ?discovery of the Balkans? was brought into being precisely due to wars, one shouldn?t be surprised to find that many academic approaches to questions of Yugoslavia dismemberment are biased, superficial or exotic. On the other hand, Serbian academic auditorium was far from being active in elaborating questions of its own contemporality and closest past - for various reasons, but mostly because of its detachment from systematic explorations. Thus, acknowledgement and presentations of mentioned issues were left to be the job of media publicists, others outside of academic community or were left to be treated in the time to come. Domestic scholars were rarely intrigued to deal with these matters, despite the fact that images of recent wars were often built on stereotypes and propaganda and that the formed knowledge of the entire subject suffered from severe simplification. The themes of great violence were particularly avoided which left some of the crucial war events out of the academic focus - the reason being, very probably, the estimation that what made Serbia and the region worldwide known is best to be forgotten. Contemporary academic silence on recent wars, in retrospection, could easily be placed within the continuum of silence during the socialist period and war which preceded it. Having all mentioned in mind, this paper not only investigates reasons for avoiding the issues of the nearest past and influences of silence in socialism on what came afterwards, but also highlights the importance of exploring semantics and functions of silence and silencing in recent wars, as well as the relationship between silence and social memory constructions.
Istorija i pravda u Hobzovoj perspektivi
Authors: Milisavljevic Vladimir , Dobrijevic Aleksandar
Published: January 2008

(fra) Ce texte se propose de nuancer la dichotomie stricte entre les concepts d?histoire et de justice, qui est courante dans l?interpr?tation de la pens?e hobbesienne. L?attitude critique de Hobbes envers l?histoire s?explique par sa pol?mique contre l?h?ritage de l?antiquit? classique, qui d?coule de son projet d?une science rigoureuse de la morale et de la politique. Cependant la conception hobbesienne de la justice ne se laisse pas d?velopper sans faire appel ? certains ?l?ments factuels et empiriques; elle ne se r?duit donc pas ? une construction purement rationnelle. Ces ?l?ments ouvrent la pens?e hobbesienne ? la probl?matique de l?histoire r?elle; pour Hobbes, le repr?sentant le plus important de ce genre d?histoire est Thucydide. Enfin la dimension historique de la pens?e de Hobbes nous permet d?entrevoir chez lui un concept de justice plus large, qui franchit les limites de la justice contractuelle.
Social scientists as expert witnesses in The Hague Tribunal and elsewhere
Authors: Petrovic Vladimir
Published: January 2008

The article analyses the role of social scientists as expert witnesses in the ICTY, whose contribution is assessed in the light of the long development of this practice. Wider discussion on the courtroom usage of scientific knowledge is evoked in order to emphasize the problems in regulation of expert witnessing. Differing mechanisms set to ensure the scientific reliability and legal relevance of the contribution of experts is analyzed in different legal contexts and in different scholarly disciplines. Regulation of expert witnessing in The Hague tribunal is perceived as specific solution whose consequences are tracked through the role of experts in the trials and through the public perception of this role. The goal of such approach is to nuance the dominant interpretations on the role of scholars in the Hague tribunal and to create the preconditions for understanding of the specific character of their role.
Policy of multiculturalism: Protection or control of ethnic identities?
Authors: Basic Goran
Published: January 2008

Policies of multiculturalism are not an inheritance of modern and liberal state, although it is often concluded in the public. Historical empires states of ?old? democracy, colonial and immigrant societies, as well as eastern European countries after the experiment with communism confronted with a problem of ?control? of multiculturalism. Models of the multicultural policy are numerous and dependable on political, social and cultural circumstances in different parts of the world, and often culturally similar states develop different multicultural policies. Historical and contemporary experiences related to the multicultural policies are discussed in the paper and the last part deals conditions in which contemporary Serbia responds on requirements and challenges of its own multiculturalism.
Za jednu nauku o naucnom polju
Authors: Biresev Ana
Published: January 2008

(fra) Cet article traite de l?analyse du champ scientifique de Bourdieu. Dans la premi?re partie de ce texte l?auteure examine la vision bourdieusienne de la structure et de la dynamique du champ de la science. La deuxi?me partie est consacr?e ? la consid?ration des pr?suppositions ?pist?mologiques et m?thodologiques fondamentales d?une science du champ scientifique d?velopp?es par Bourdieu ? travers un dialogue avec quatre traditions, d?apr?s lui relevantes de la sociologie et de la philosophie de la science: la tradition structuro-fonctionnaliste ou mertonienne de sociologie de la science, la th?orie de la science normale et des r?volutions scientifiques de Thomas Kuhn, le programme dit fort de David Bloor et les ?tudes de vie de laboratoire. La troisi?me partie de ce texte est une esquisse da la critique sociologique, voir bourdieusienne, de la raison scolastique, notamment de ses manifestations dans le domaine de la connaissance, dans le domaine de l??thique et dans le domaine de l?esth?tique.
Attitudes of Belgrade University employees on corruption
Authors: Gredelj Stjepan
Published: January 2008

Corruption is widely overspread phenomenon in all transition countries. In this sense Serbia is not exception, on the contrary, it was always highly ranked in all corruption indices of Transparency International. Among social areas which are considered as saturated with corruption highly ranked is the field of university education. In order to check justification of such perceptions, we have conducted a survey among Belgrade University employees. The findings confirmed that there exist corruption in high education on one side and that there is not too much readiness of employees to oppose it, if not to tear it out, than at least to diminish it.
On enlightenment and taste: Outline of a research topic
Authors: Boskovic Dusan
Published: January 2008

The author puts forward a set of assumptions and possible context for examining the connection between the concepts of enlightenment and taste. Kant?s definition of enlightenment is accepted, with special emphasis on the sphere of religion. Applying this criterion, we may discern a powerful and influential religious current stemming from strictly speaking Church circles that denies the systematic and historical significance of the opus of Dositej Obradovic, who in his time was a protagonist of the European enlightenment. Such a revaluation has been accepted by the greater portion of the younger generation, which relies predominantly on the St. Sava Myth. With a change of worldview, undoubtedly, tastes change as well. The next section of the paper discusses the approach to taste of the Scottish philosopher David Hume representative of dispositional aesthetic. Finally it is argued that music as one of the arts, might be exemplary for appraising the condition of enlightenment in a society.
Pulsed doppler tissue imaging in the early diagnosis of coronary artery disease
Authors: Zdravkovic Marija , Deljanin-Ilic Marina , Trifunovic-Zamaklar Danijela , Milinic Nikola , Zdravkovic Darko , Milic Natasa
Published: January 2008

Introduction Cardiovascular diseases are the leading cause of death in the majority of well-developed countries. Importance of early diagnosis Early diagnosis of coronary artery disease is difficult due to blood vessels remodeling, late manifestations of reduced maximal and normal coronary blood flow, and negative correlation between stenosis and plaque burden. Pulsed Doppler tissue imaging Pulsed Doppler tissue imaging is used for assessment of myocardial velocity, whereas classical Doppler imaging is used for measurement of blood flow velocity. Systolic myocardial velocity profile During the systolic phase only a single myocardial motion is registered - S wave. Diastolic myocardial velocity profile There are early and late myocardial relaxation velocities. Impact of coronary artery disease on myocardial velocities Early to late myocardial relaxation velocity ratio is influenced by coronary artery disease. This paper provides practical guidelines for using pulsed doppler tissue imaging. Conclusion Pulsed Doppler tissue imaging is an excellent procedure for early diagnosis of coronary artery disease. .
Menstrual migraine
Authors: Simic Svetlana , Slankamenac Petar , Cvijanovic Milan , Banic-Horvat Sofija , Jovin Zita , Ilin Miroslav
Published: January 2008

Introduction. The prevalence of migraine in childhood and adolescence has not changed to a great extent, but it increases in adolescence, especially in female adolescents. Menstrual migraine ? definition. There are two types of menstrual migraine: true menstrual migraine and menstrual related migraine. True menstrual migraine occurs predominantly around menstruation, whereas menstrual related migraine occurs during menstruation, but also at other times during the month. Causes. Exaggerated or abnormal neurotransmitter responses to normal cyclic changes in the ovarian hormones are probably the basic cause of menstrual migraines. The fall in estrogen levels during menstrual cycle is trigger for the menstrual migraine. Symptoms. Menstrual migraine has the same symptoms as other types of migraine, but the pain is stronger, IT lasts longer, AND IT IS more frequent than other types of migraines. Diagnosis. In order to make a diagnosis, women are asked to keep a headache diary for three months. If the migraine headache is severe and occurs regularly between two days before and three days after the start of menstrual bleeding, it is true menstrual migraine. Therapy. Menstrual migraines are more difficult to treat than other types of migraines. Treatment principles for menstrual migraine are the same as for migraines in general, with certain particularities. Conclusion. Hormonally associated migraine is a specific clinical entity. It is important to diagnose the type of migraine, considering the fact that a decline in estrogen level at the end of menstrual cycle triggers migraine, so it can be treated by low levels of estrogen. .
Ultrasonography in the diagnosis of hypertrophic pyloric stenosis and intussusception: Emergency conditions in pediatric gastroenterology
Authors: Jeckovic Mihajlo , Lovrenski Jovan , Till Viktor , Lucic Zorka
Published: January 2008

Introduction. Hypertrophic pyloric stenosis (HPS) is the most common abdominal surgical condition in newborns and infants, while intussusceptions is the most frequent problem in children between the ages of 6 months and 2 years. The aim of this study was to show the advantages of ultrasonography in diagnosis of hypertrophic pyloric stenosis and intussusception and also to point out the efficiency of ultrasound guided hydrostatic reduction of childhood intussusception, as a nonoperative therapeutic option. Material and Methods. This study had a prospective design and included 208 patients in a 2-year period (2004-2005). Both US examinations were done using a linear 7.5 MHz probe, and the main ultrasound criteria for HPS were increased pyloric muscle thickness of 3mm and over, as well as pyloric length over 15mm, typical ultrasonic findings of intussusception included a target sign or a pseudokidney sign. Sonographically guided hydrostatic reduction of intussusceptions was also performed. Results HPS was predominant in male infants, and the mean age was 40 days. The mean pyloric muscle thickness was 4.95mm in infants with HPS, and the average length of the antropyloric canal was 19.26mm. In patients with intussusception, male predominance was also observed and the mean age was 1 year and 79 days. The intussusceptum was most often located in the cecoascending (53.6%) and transverse colon (21.4%). US- guided hydrostatic reduction of intussusception was successful in 82.14% of all cases. Discussion. Our findings are in absolute agreement with literature data regarding the average age of patients, both with HPS and intussusception, thickness of the muscular layer, length of the antropyloric canal, and extremely successful US-guided hydrostatic reduction of intussusceptions. Conclusion. Ultrasonography has proved to be a remarkably precise diagnostic modality in diagnosing HPS and intussusception, but also makes nonoperative treatment of intussusceptions possible in extremely high percentage. .
Acute myocardial infarction incidence and mortality rates in the population of the city of Nis in the period 1974-2000
Authors: Lazovic Marko , Lazovic Milica , Devecerski Gordana , Bojanic Vladmila , Krstic Nebojsa , Pesic Lela
Published: January 2008

Introduction. The aim of this study was to investigate the annual incidence of hospital morbidity and mortality rates of acute myocardial infarction (AMI) in the population of Nis who were treated at the Cardiology Clinic in Nis during the period 1974-2000. Material and Methods. A retrospective clinical-epidemiological study was carried out in the population of the city of Nis aged 30 years and over. The number of citizens of Nis, aged 30 years and over, was 71.500 in 1974, and 100.000 in 2000, while the male to female ratio was 48 %:52%. Results. During the period from 1974 to 2000, 4319 patients of both sexes with AMI received hospital treatment. The average annual incidence rate was 159.92 per 100.000 inhabitants aged 30 years and over. The average annual incidence of AMI showed a trend of progressive increase, and in 2000 it was 274.87 (2.7 times higher than in 1974 - 102.19). The average annual mortality for both sexes was 11.57% (9.82% for males and 15.89% for females). The female mortality rate was significantly higher (p< 0.001). Conclusion. Trends in annual incidence rate of AMI in the population of the city of Nis aged 30 years and over are characterized by progressive increase during the period from 1974 to 2000. The trend line: yt = 159.92+6.2432x shows that without primary prevention further increase in the incidence of AMI can be expected. .
Anxiety disorders in dialysis patients
Authors: Novakovic Milan
Published: January 2008

Introduction. Anxiety, as a primary symptom, includes all conditions of indefinite fear and psychic disorders dominated by fear. All dialysis patients suffer from anxiety as an independent phenomenon, or as part of another disease. Material and Methods. This study included 753 patients on chronic hemodialysis in Bosnia and Herzegovina (B&H) in the period 1999-2004. The patients were divided into two groups: the first group included 348 patients with Balkan Endemic Nephropathy (BEN), and the control group included 405 patients with other diagnoses causing renal insufficiency (N18). The study was designed as a comparative cross sectional study, and patients were tested using questionnaires assessing anxiety, depression and general mental health status. Statistical analysis was done using standard descriptive and analytical methods. Results. Socio-demographic data showed highly significant differences between BEN and N18 in relation to place of residence (urban/rural) (c2 = 23.970) p<0.01; in the incidence of renal comorbidity (c2 = 23.970) p<0.01; familial renal comorbidity (c2 = 23.970) p<0.01; and migrations (c2 = 4.874) p<0.01. Beck Anxiety Inventory Scores were highly significantly different between the two groups p<0.001, in regard to the incidence and variables. Hamilton Depression Rating Scale demonstrated a group significance p<0.001, and variables pointed to somatization, general anxiety and depression. This was confirmed by mini-mental state examination pointing to generalmental weakness. Conclusion. Anxiety appeared in all tested dialysis patients. It may be independent, somatized as part of another mental disorder or reinforced by a cognitive damage. Structured anxiety and depression result in pre-suicidal risk. .
Blunt external laryngeal trauma: Two case reports
Authors: Mitrovic Slobodan
Published: January 2008

Introduction. External laryngeal trauma, blunt or penetrating, is rare but potentially life-threatening. Most frequently it occurs in motor vehicle accidents. The most common symptoms of external laryngeal injuries are: dysphagia, odynophagia, dysphonia, odynophonia, reduction of the laryngeal prominence, hemoptysis and neck crepitation. Two case reports. This paper reviews two cases of blunt laryngeal injury caused by a direct blow to the neck. After admission, both patients underwent clinical examination, as well as radiography of the neck, and computer tomography of the neck and larynx. GIRBAS scale was used for voice analysis. In the first case, computer tomography showed a fracture of the right thyroid cartilage in the posterior lamina where it is attached to the upper horn. In the other case, the presence of air was confirmed by radiography of the upper aperture. Computerized tomography showed the presence of air in the neck, underneath the skin, which was probably the consequence of the larygeal valve mechanism trauma. Both patients were treated conservatively. Discussion and Conclusion. The symptomatology of external larygeal trauma may include: hoarseness, swallowing difficulties and/or painful swallowing, painful phonation, neck pain, bloody sputum and breathing difficulties. The clinical symptoms of blunt laryngeal trauma may be hidden and non-specific, but also clear, indicating a larynx trauma, and vice versa. Quick diagnosis using computerized tomography, hospitalization and adequate therapy, can reduce the consequences of these injuries and increase the chances for a complete recovery of larygeal musculature and function. .
A case of choledochal cyst complicated by biliary peritonitis
Authors: Cvijanovic Radovan , Jokic Radojica
Published: January 2008

Introduction. Choledochal cyst is a rare congenital malformation of the extrahepatic bile ducts. Its incidence varies among different populations, but it is highest in North East Asia. It is most frequent in childhood, and very rare in adults. Case report. A 7 year-old boy was admitted to the hospital with severe abdominal pain under the right rib margin. He presented with constant nausea, occasional jaundice and high colored urine. The following day the boy underwent ultrasound examination and computer tomography (CT). A choledochal cyst was found, and a CT-controlled puncture of the cyst was performed. An X-ray was taken by injecting contrast medium through the drain. A small leakage into the abdominal cavity was observed with subsequent peritonitis. The general condition of the child deteriorated and a decision was made to operate immediately. An upper medial laparotomy was performed. A cystic formation was noted in the hepatoduodenal ligament of 90x70 mm in dimension. The cyst was completely removed and a hepatico-jejunal anastomosis was performed. The child tolerated the surgery well and recovered quickly. Discussion. Cystic dilation of the common bile duct, known as choledochal cyst, is related to a rare malformation of this region. The exact mechanisam of cyst formation remains unknown. Choledochal cysts usually present in the early childhood, with higher frequency in females. The diagnosis is easily made, especially with the use of ultrasound and computed tomography. The treatment is usually surgical, and complete resection of the cyst with hepatico-jejunal anastomosis is the therapy of choice. Conclusion. One year later, ultrasound examination and specific dynamic tests (HIDA) showed normal liver function, and good anastomosis. .
A finite time-horizon deterministic EOQ model with stock-dependent demand, effects of inflation and time value of money with shortages in all cycles
Authors: Roy T. , Chaudhuri K.S.
Published: January 2008

A finite time-horizon deterministic inventory model is developed, taking the demand rate at any instant to be a function of the on-hand inventory (stock-level) at that instant. Shortages in inventory are allowed. The effects of inflation and time value of money are considered. Two separate inflation rates: namely, the internal (company) and the external (general economy) are introduced. A numerical example of the model is discussed. A sensitivity analysis of the optimal solution with respect to the parameters of the model is examined.
An integration strategy for large enterprises
Authors: Risimic Dejan
Published: January 2008

Integration is the process of enabling a communication between disparate software components. Integration has been the burning issue for large enterprises in the last twenty years, due to the fact that 70% of the development and deployment budget is spent on integrating complex and heterogeneous back-end and front-end IT systems. The need to integrate existing applications is to support newer, faster, more accurate business processes and to provide meaningful, consistent management information. Historically, integration started with the introduction of point-to-point approaches evolving into simpler hub-and spoke topologies. These topologies were combined with custom remote procedure calls, distributed object technologies and message-oriented middleware (MOM), continued with enterprise application integration (EAI) and used an application server as a primary vehicle for integration. The current phase of the evolution is service-oriented architecture (SOA) combined with an enterprise service bus (ESB). Technical aspects of the comparison between the aforementioned technologies are analyzed and presented. The result of the study is the recommended integration strategy for large enterprises.
An algorithm for the detection of move repetition without the use of hash-keys
Authors: Vuckovic Vladan , Vidanovic Djordje
Published: January 2008

This paper addresses the theoretical and practical aspects of an important problem in computer chess programming - the problem of draw detection in cases of position repetition. The standard approach used in the majority of computer chess programs is hash-oriented. This method is sufficient in most cases, as the Zobrist keys are already present due to the systemic positional hashing, so that they need not be computed anew for the purpose of draw detection. The new type of the algorithm that we have developed solves the problem of draw detection in cases when Zobrist keys are not used in the program, i.e. in cases when the memory is not hashed.
Early-Christian monuments on the eastern slopes of the Kopaonik mountain
Authors: Tosic Gordana , Raskovic Dusan
Published: January 2008

Significant Early-Christian localities referring to the rich mining activities of this region were found on the Kopaonik Mountain or in the Silver Mountain, as it was named by Roman, Venetian, and Turkish sources. From broader point of view, even from the times of Roman provinces settlement on the Balkan, the area of Serbia with very thick settlements? net was used as a logistic and strategic support of the Roman Empire. The territory being the subject of our research is the zone where provinces Moesia Prima Mediterranean Dacia (Dacia Mediterranea) and Dardania meet. The sites that offer new data for the process of settlement and Christianization of these regions are CELESTIAL CHAIRS on the top of Kopaonik at the altitude of 1,800 m, DUB in Mala Vrbnica in the bottom of the Mountain and Gradac in Gornje Levice at 1,089 m altitude. They are in the northern part of Dardania, in the Province where silver with lead were dug as well as golden silver together with exploitation of iron, copper and mercury ores. The zone of these findings gravitates to Roman administrative center Municipium Dardanorum near to Socanica at Kosovo. Thus, it may be assumed that still non-referred northern border of Dardania could have covered eastern slopes of Kopaonik up to the bottom and border with Aleksandrovac Zupa. On the eastern slopes of Kopaonik three early-Christian basilicas were found; one in Celestial Chairs with floor mosaic; another in Gradac site in Gornje Levi}e within the fortress and the third one in the Dub site in a village Mala Vrbnica, with stone decorative plastic. All these buildings date from the period of 5-6th century based on archeological material. Sites in Celestial Chairs and the one in Gornje Levice have, as many castles in broader vicinity, continuity of 4-6th century proved by founding of secular objects like fibula with bent legs, cross-like fibulas, money, ceramic fragments with rake ornaments. Porkpie stated that Dardania had reconditioned 68 fortresses out of 70 original ones, and only 8 were new-built. Celestial Chairs visually dominate the whole area. From this place, one can see as on his palm Early-Byzantine fortresses on Vojetin, Cucaica and in Gornje Levice, as well as the mines in Zaplanina and Belo Brdo. Having in mind natural features of the terrain historical surrounding, and, first of all, archeological finding, we think that Celestial Chairs and Gornje Levice could be the spot to look for spiritual and administrative center of the northern part of Roman province Dardania.
New observations on the miniature of the vision of Saint Gregory of Nazianzus in Paris. GR. 510
Authors: Gavrilovic Zaga
Published: January 2008

The article deals with the iconography of the illustration of the Second Paschal Homily of St. Gregory of Nazianzus on fol. 285r of the Paris manuscript. It questions the identity of the woman saint represented on the right of St. Paraskeve in the lower register of the scene. Unlike that above St. Paraskeve, the inscription identifying this second woman saint is fragmentary and difficult to read, but it has been widely accepted that she is Saint Helena, mother of the Emperor Constantine the Great. On the basis of two other representations of Helena in the same manuscript and of the style of the inscription accompanying them, as well as taking into account the importance of the theological meaning expounded by St. Gregory in his oration, it is suggested that the second woman saint may be St. Kyriake.
The earliest cults of Saints in Ragusa
Authors: Zivkovic Tibor
Published: January 2008

The peripheral zones where the Constantinopolitan and Roman ecclesiastical influences met often contain evidence of the intermingling of the cults characteristic of both Churches. The cult of St Pancratius, well established in Ragusa (Dubrovnik) during the Early Middle Ages, could be a good example for the studies on ecclesiastical matters in Dalmatia. The question is, when and under which political circumstances the cult of St Pancratius was established in Ragusa. Whether it was caused by unilateral action of Pope or joint policy of Constantinople and Rome.
Founder’s model: Representation of a maquette or the church?
Authors: Markovic Cedomila
Published: January 2008

The text deals with some terminological problems concerning the so-called founder?s model. Although it is commonly used to designate the depicted architecture in the hand of the church founder, the expression 'founder?s (ktetor?s) model' is often confusing and misleading. The main question is whether the Byzantine architects used actual model/maquettes for constructing their churches and if so, could these models/ maquettes have been used for the architecture depicted in founders? portraits? In other worlds is the representation in the donor?s hand the image of a built church or its maquette, produced as a project model? The different aspects of the problem we analyzed - the legal, technical and symbolic functions of these representations support our assumption that the architectural design model/maquette did not serve as a specimen for representations of architecture on founder?s portraits. This specific type of architecture depicted was created after the building itself was completed.
Prophets carrying texts by other authors in Byzantine painting: Mistakes or intentional substitutions?
Authors: Popovich Ljubica
Published: January 2008

Since there are no two identical churches in Byzantine art, consequently there are no two identical iconographic programs. This observation also applies to the representation of prophets in the drums of the domes or in other locations in Byzantine churches. Research dealing with this group of Old Testament figures reveals many variations regarding the planned selection of prophets and choices of the texts that they carry inscribed on their scrolls. This study examines the instances when one of the authors of the prophetic books carries the text by another author. These occurrences are neither frequent nor accidental. Such deviations from standard practice that are explored in this article demonstrate the following: first of all exchanges of text can occur due to the mistake by the artist, as exemplified in the Palace Chapel in Palermo, or by the mistake of the person who inscribed the texts, as in the Chapel of Joachim and Anna in the Monastery Studenica. Secondly, in a number of monuments the text-bearer and the selection of the text by another prophet-author are not accidental. For example, if a number of quotations to be used are chosen from the book by the prophet Isaiah, and he is only represented once, because repetition of the same prophet within a group of Old Testament figures was not practiced, what is to be done? Therefore, other, usually minor, prophets, were selected to hold the scrolls inscribed with the text by other authors, for example Isaiah. Such cases are well documented in the churches of Panagia ton Chalkeon and the Holy Apostles in Thessalonike, and in the church of the Resurrection in Verroia, where the selection of prophets? quotations, usually inspired by the liturgical tradition, furthermore serves to underscore a certain idea of a theological or iconographic nature.
Classical elements in the Serbian painting of the fourteenth century
Authors: Gligorijevic-Maksimovic Mirjana
Published: January 2008

In the early 14th century influences of a new style emanating from Constantinople contained reminiscences of classical ideas and forms (contents of compositions, the painted landscape, the human figures, genre scenes based on everyday life, classical figures, personifications and allegorical figures). Towards the end of the century classical influences in painting began to wane.
O jednoj srpsko-ugarskoj alijansi
Authors: Cirkovic Sima
Published: January 2008

(francuski) Cet article est fonde sur une lettre adress?e au pape, dans la seconde moitie de 1346, par un pr?lat hongrois inconnu, que son inventeur, le d?funt acad?micien hongrois Pal Engel (1938-2001), a c?de a l'auteur de ces lignes ?pres en avoir reconstruit le texte. Son original est conserve a Vienne: Nationalbibliothek, Wien, Cod. 2042 f. 1a. Le contenu de cette lettre est ici publie en annexe selon le texte manuscrit de Pal Engel. Dans le commentaire sont exposes les arguments en faveur de sa datation de la seconde moitie de 1346, expliques les titres d'empereur des Grecs et de roi de Serbie respectivement portes par le souverain serbe et son fils. Les donn?es relatives a une paix et un mariage convenu entre le roi Uros et une parente du roi Ludovic Ier sont replac?es mis dans le contexte des relations serbe-hongroises de la premi?re moitie du XIVe si?cle. Afin de se prononcer sur la r?alisation de l?accord dont parle cette lettre l?auteur a une r?vision et un recoupement de toutes les donn?es ?voquant les projets de Du{an en ce qui concerne le mariage de son fils Uros.
Okov Vatopedske ikone Bogorodice Vimatarise iz epohe Paleologa
Authors: Loverdou-Tsigarida Katia
Published: January 2008

(francuski) Lobe de cet article est de pr?senter de mani?re d?taill?e le deuxi?me rev?tement de l'icone de la Vierge Vimatarissa de Vatopedi et d'examiner l'?ventualit? qu'il s'agisse d'une donation d'un personnage c?l?br?, Stefan Du{an (Etienne Douchant).
Re-use of decorated silver plates: A gospel cover in the Monastery of St John on Patmos
Authors: Ikonomaki-Papadopoulou Yota
Published: January 2008

In this article an account is given of a gospel cover from the Monastery of the Apocalypse, today in the sacristy of the Monastery of St John the Theologos, on Patmos. It is decorated with sheets and plaques from objects of differing origins and periods, from the 13th-14th to the 17th century.
Radosthlabos Sampias - Radoslav Sablja
Authors: Bubalo Djordje
Published: January 2008

Several Greek documents from the Archives of the Athonite monastery of St Paul contain information about Radosthlabos Sampias, a Serbian nobleman at the service of the Byzantine Emperors Andronikos IV and John VII. Moreover, a certain Sabyai mentioned in a Turkish document from the same monastery reveal seemingly another reference to Radosthlabos Sampias. Although scholars are agreed on his Serbian origin, they have not shown any interest in the sense or etymology of the Radosthlabos? family name Sampias / Sabyai. A clue to this problem can be found in a short Cyrillic note on the 15th century copy of the Andronikos IV charter issued to Radosthlabos in 1378. The note says: ? pr'vi hrisovul' radosava sablie (The first chryssobul of Radosav the Sabre). Accordingly, the nickname or the family name of Radosthlabos was Sabre, a term for a heavy sword with a curved blade. The word occurs in Serbian sources in two similar forms (sablia and sabia), and their Latin equivalents are sabla and sabia. Grounded in these facts, the explanation of the Greek transcription Sampias is relatively simple - a group of letters mp is used to replace b, hence the word was pronounced as sabias or sambias. Turkish variant Sabyai is also derived directly from a Serbian matching term. It seems most likely that Radosthlabos (or his father) earned this nickname as a person who skillfully handled a sabre.
Hristova genealogija u crkvi Sv. Petra i Pavla u Velikom Trnovu
Authors: Penkova Biserka
Published: January 2008

(bugarski) Statijata razglezda unikalnata kompozicija na Hristovata genealogija v mitropolitskata c''rkva 'Sv. Sv. Pet''r i Pavel' v''v Veliko T''rnovo. Razpolozeni v medal'oni, obrazuvani ot rastitelen motiv, predcite na Hristos po pl''t zaemat arkite mezdu pritvora i naosa, kakto i vsicki steni na pretvora. Dvanadesette sina na patriarh Jakov sa izobrazeni v golemi medal'oni v apsidata. Unikalen element ot Genealogijata e vkljucvaneto na obrazite na 14 starozavetni zeni v juznata arka. Osnovana v''rhu genealogiite po Matej i Luka, kompozicijata sledva ocevidno s''scestvuval po-ranen variant na tazi cast ot Erminijata na Dionisij ot Furna, koeto osobeno jarko se projavjava v obrazite na pravednite zeni i sinovete na Jakov. Starozavetnata tema se dop''lva ot obrazite na proroci v gornite casti na stenite, ot koito sa zapazeni fragmentarno samo dvama, kato edinijat moze da se identificira s prorok Samuil.
Datovane postvizantijske oltarske pregrade iz zapadne Makedonije, 16-18. vek
Authors: Sabbopoyloy-Katsikē Xanthē
Published: January 2008

(grcki) St? sygkekrimen? melet? paroysiazontai epta templa cronolog?mena epakrib?s apo epigraphes kai ena templo poy chronologeitai me bebaiot?ta apo eggrapha poy aphoroyn st?n paraggelia kai t?n pl?r?m? toy. Ola briskontai se mn?meia t?s Dytik?s Makedonias. Cronologoyntai apo ton 16o e?s kai ton 18o ai?na kai op?s diapist?netai echoyn syggeneia me ta templa t?s Hpeiroy, t?s Qessalias, t?s perioch?s t?s Dropol?s st?n Albania, t?s Achridas kai toy Nerezi.