Ivan Aleksic - Academia.edu (original) (raw)

Papers by Ivan Aleksic

Geodetic reference systems and their realization at the territory of Serbia have been created and... more Geodetic reference systems and their realization at the territory of Serbia have been created and maintained since the end of 19th century. Until mid-80s a series of reference geodetic networks were established: trigonometric networks in four orders, two levelling networks of high accuracybut also a series of gravimetric networks. In the following period of 20 years, there were not any organized worksaiming to maintenance of existing networks and creating new ones. In 1996, works started again on developing a new geodetic infrastructure in the form of realizing: a passive geodetic network, a network of permanent stations (AGROS – the active geodetic reference network of Serbia) as well as basic gravimetric networks. In this paperwork, a short review of works aiming to establish and use said networks is given but also a series of suggestions for a future development of geodetic infrastructure of Serbia

ABSTRACT The paper describes the current situation of academic surveying education in Serbia and ... more ABSTRACT The paper describes the current situation of academic surveying education in Serbia and in Austria. It outlines the national and international frame for the higher educational programs in general and surveying education in particular. An overview about the provided curricula and study programs regarding the various fields of surveying is given. The impact of the paradigm shift in academic education in the academic surveying education is analysed. The status quo of continuing professional education provided in both of the countries is presented. Two future trends in academic surveying education are drafted: the design of new curriculums and the implementation of a quality management system. Conclusions on the presented topics complete the article.

Geodetski vestnik, 2015

Identification of movements using different geodetic methods of deformation analysis.

This paper is based on comparative analysis of applied analysis methods on geodetic networks defo... more This paper is based on comparative analysis of applied
analysis methods on geodetic networks deformation, based
on two-dimensional components of GNSS baseline vectors
simulated by two epochs, for the purpose of identifying
significant movements in horizontal plane. The following
models of deformation analysis have been applied: Pelzer
(Hanover procedure) method, Karlsruhe method, Modified
Karlsruhe method, and the method implemented in the
JAG3D open-source software.

Components of vertical deflection as a function of anomaly potential are determined by using astr... more Components of vertical deflection as a function of anomaly potential are determined by using astrogeodetic or gravimetric methods. In this paper components of deflections obtained by astrogeodetic method were considered as conditionally correct and deflection of components determined by using gravimetric method, from conditionally correct values, were shown as digital terrain model quality functions and adopted hypothesis on the earth's crust masses density.

SUMMARY The paper shows the competencies of the Republic Geodetic Authority, its organizational s... more SUMMARY The paper shows the competencies of the Republic Geodetic Authority, its organizational structure, achieved results and prospect of future strategic plans and actions in the scope of the Mid-Term Development Program of the Republic Geodetic Authority supported by the proposed Real Estate Cadastre and Registration Project in Serbia, the loan provided by the World Bank.

Objective: Pretransplant pulmonary vascular resistance ) 4 Wood-units predisposes to right ventri... more Objective: Pretransplant pulmonary vascular resistance ) 4 Wood-units predisposes to right ventricular failure after heart transplantation. Total orthotopic heart transplantation with bicaval and pulmonary venous anastomoses offers synchronous contractions of the atria and a normal ventricular filling pattern, but requires longer ischemic time than standard orthotopic heart transplantation. To test if total orthotopic heart transplantation improves resting hemodynamics in pts

Purpose: We hypothesized that total orthotopic heart transplantation (TOHT) improves humoral reje... more Purpose: We hypothesized that total orthotopic heart transplantation (TOHT) improves humoral rejection hemodynamics compared with biatrial transplantation or standard orthotopic heart transplantation (SOHT). Methods: We reviewed 1942 biopsies from 134 patients (pts) and right heart catheterization data obtained at endomyocardial biopsy. Biopsies that displayed humoral rejection by histological findings and positive immunofluorescence for immunoglobulins and complement were analyzed. Patients with pacemakers, atrial fibrillation or ͱ-blocker therapy at the time of biopsy were excluded. Thirty-two pts after TOHT and 22 after SOHT matching these criteria were identified. Results: Demographic data, underlying disease, pretransplant hemodynamics, and donor demographics were similar. Cardiac output and index were higher in the total orthotopic group (5.9±1.1 vs 5.1±1.4 L/min, p=0.027; 3.3±0.5 vs 2.8±0.6 L/min/m 2 , p=0.016). Right atrial and pulmonary capillary wedge pressure were lower after TOHT (7±3 vs 11±5 mmHg, p<0.001; 13±4 vs 16±5 mmHg, p=0.035). Pulmonary pressures, pulmonary vascular resistance and heart rate were similar. Conclusion: TOHT offers improved hemodynamics during humoral rejection as evidenced by higher cardiac output and index with lower right atrial and pulmonary capillary wedge pressures. Future studies must examine the potential benefits of TOHT during combined cellular and humoral rejection events. (Ann Thorac Cardiovasc Surg 2004; 10: 285-9)

Annals of thoracic and cardiovascular surgery : official journal of the Association of Thoracic and Cardiovascular Surgeons of Asia, 2004

We hypothesized that total orthotopic heart transplantation (TOHT) improves humoral rejection hem... more We hypothesized that total orthotopic heart transplantation (TOHT) improves humoral rejection hemodynamics compared with biatrial transplantation or standard orthotopic heart transplantation (SOHT). We reviewed 1942 biopsies from 134 patients (pts) and right heart catheterization data obtained at endomyocardial biopsy. Biopsies that displayed humoral rejection by histological findings and positive immunofluorescence for immunoglobulins and complement were analyzed. Patients with pacemakers, atrial fibrillation or beta-blocker therapy at the time of biopsy were excluded. Thirty-two pts after TOHT and 22 after SOHT matching these criteria were identified. Demographic data, underlying disease, pretransplant hemodynamics, and donor demographics were similar. Cardiac output and index were higher in the total orthotopic group (5.9+/-1.1 vs 5.1+/-1.4 L/min, p=0.027; 3.3+/-0.5 vs 2.8+/-0.6 L/min/m2, p=0.016). Right atrial and pulmonary capillary wedge pressure were lower after TOHT (7+/-3 v...

Annals of Vascular Surgery, 2001

The indications for surgical management of primary subclavian vein thrombosis are not agreed upon... more The indications for surgical management of primary subclavian vein thrombosis are not agreed upon. This report describes our experience in the treatment of exertional thrombosis causing Paget-Schroetter syndrome in 10 athletes between 18 and 45 years of age. In seven patients urokinase was injected and this resulted in complete revascularization in three cases (42.9%). The remaining three patients were treated by anticoagulation using heparin with adjuvant Coumadin after resolution of thrombosis. Duplex ultrasonography and dynamic phlebography were performed to assess the results of drug treatment. Decompression of the thoracic outlet was performed secondarily using various techniques, including first-rib resection in 10 cases, scalenectomy in 9, and resection of a clavicular callus in 1 case. In six patients, persistent debilitating venous stasis required revascularization by axillojugular bypass in three cases, thrombectomy in two, and axillojugular anastomosis in one case. All patients were reexamined. Mean follow-up was 45 months. Symptomatic relief and vein patency was achieved in all cases. All patients were able to resume sports activity. In agreement with previous studies, our findings confirm the efficacy of immediate anticoagulation, thrombolysis, and complete decompression of the thoracic outlet. Should this approach fail to reestablish patency, axillosubclavian vein revascularization can provide good mid-term results.

The paper describes the current situation of academic surveying education in Serbia and in Austri... more The paper describes the current situation of academic surveying education in Serbia and in Austria. It outlines the national and international frame for the higher educational programs in general and surveying education in particular. An overview about the provided curricula and study programs regarding the various fields of surveying is given. The impact of the paradigm shift in academic education in the academic surveying education is analysed. The status quo of continuing professional education provided in both of the countries is presented. Two future trends in academic surveying education are drafted: the design of new curriculums and the implementation of a quality management system. Conclusions on the presented topics complete the article.

Revue de Chirurgie Orthopédique et Réparatrice de l'Appareil Moteur, 2006

We report a case of Aspergillus fumigatus infection of a total hip arthroplasty. This rare infect... more We report a case of Aspergillus fumigatus infection of a total hip arthroplasty. This rare infection was demonstrated at surgical revision of a loosened prosthesis with migration of the cup into the pelvis associated with a false aneurysm of the femoral artery. A vascular time was required before the orthopedic revision.This case illustrates the importance of the preoperative work-up in

Emery-Dreifuss muscular dystrophy (EDMD) is a hereditary neuromuscular disorder characterized by ... more Emery-Dreifuss muscular dystrophy (EDMD) is a hereditary neuromuscular disorder characterized by slowly progressive muscle weakness, early contractures, and dilated cardiomyopathy. We reported an uneventful general anaesthesia using total intravenous anaesthesia (TIVA) for cardiac transplantation in a 19-year-old woman suffering from EDMD. In vitro contracture test results of two pectoralis major muscle bundles of the patient suggest that exposition to triggering agents does not induce a pathological sarcoplasmic calcium release in the lamin A/C phenotype. However, due to the lack of evidence in the literature, we would recommend TIVA for patients with EDMD if general anaesthesia is required.

To determine the decision-making process of withholding and/or withdrawal (WH/WD) of life-sustain... more To determine the decision-making process of withholding and/or withdrawal (WH/WD) of life-sustaining treatment in cardiac intensive care units (ICUs) in Germany.

Core tip: We report on the case of a 74-year-old man who developed cardiogenic shock and ventricu... more Core tip: We report on the case of a 74-year-old man who developed cardiogenic shock and ventricular septal rupture following an episode of acute myocardial infarction. Cardiac magnet resonance imaging (MRI) provided detailed information on size, localization and tissue integrity of the ruptured septum with respect to the myocardial infarction zone, followed by successful surgical repair of the defect. To the best of our knowledge, this case report is the first description of post-infarction ventricular septal rupture by the use of cardiac MRI in an intensive care patient with cardiogenic shock and subsequent successful surgical repair.

In 2003, the International Liaison Committee on Resuscitation (ILCOR) published the &amp;... more In 2003, the International Liaison Committee on Resuscitation (ILCOR) published the &amp;amp;amp;amp;amp;amp;amp;quot;Utstein Style for Drowning&amp;amp;amp;amp;amp;amp;amp;quot; (USFD) to advance knowledge on the epidemiology, treatment, and outcome prediction after drowning. Applying the USFD and evaluating its data template for outcome analysis, we report here on the largest study published thus far of drowned children (age 0-14) who underwent attempted resuscitation on cardiopulmonary bypass (CPB). We conducted a retrospective review of all drowned children admitted to Göttingen University Hospital between 1/1987 and 12/2005 in sustained cardiopulmonary arrest and resuscitation with CPB. We correlated eight outcome-affecting USFD variables and four additional variables not included in the USFD with potential impact on outcome to four outcome groups: survival, non-survival, survival with full recovery, and failed resuscitation. Out of 12 children (aged 22 months to 7.5 years), 5 survived to hospital discharge and 7 died in hospital. Two survivors recovered fully and three remained in a vegetative state. In two patients, resuscitation on CPB failed. Both children who fully recovered, compared to the 10 others, had relatively low serum K+ concentrations (2.6 and 3.7 mmol/l versus 5.8+/-3.8 mmol/l [mean+/-S.D.; n=10]), a relatively slow rewarming speed (1.9 and 1.2 degrees C/h versus 3.4+/-1.8 degrees C/h), were female (all three girls survived), received early basic life support (BLS) and showed idioventricular bradycardia. Both children with failed resuscitation had severe hyperkalaemia (11.7 and 13.3 mmol/l versus 10 others, 4.0+/-1.5 mmol/l), were relatively rapidly rewarmed (6.9 and 4.0 degrees C/h versus 10 others, 2.61+/-1.32 degrees C/h), male, and in asystole. We identified no outcome trends for age, pH, or water and core temperatures. Most variables relevant for outcome in drowned children can be documented with the use of the USFD. Additional variables not included in the USFD that have emerged from this study and may predict outcome include serum K+ concentration, rewarming speed, and initial cardiac rhythm.

The Thoracic and Cardiovascular Surgeon, 1996

Objective: Pretransplant pulmonary vascular resistance ] 4 Wood-units predisposes to right ventri... more Objective: Pretransplant pulmonary vascular resistance ] 4 Wood-units predisposes to right ventricular failure after heart transplantation. Total orthotopic heart transplantation with bicaval and pulmonary venous anastomoses offers synchronous contractions of the atria and a normal ventricular filling pattern, but requires longer ischemic time than standard orthotopic heart transplantation. To test if total orthotopic heart transplantation improves resting hemodynamics in pts with high preoperative pulmonary vascular resistance, we analyzed 65 pts with standard and 65 with total orthotopic heart transplantation transplanted between 12/88 and 7/94. Of these, 18 with total and 15 with standard orthotopic heart transplantation had a preoperative pulmonary vascular resistance ]4 Wood-units. Methods: Right heart catheterization data were obtained at each endomyocardial biopsy. All data from biopsies at both 2 weeks and 1 year posttransplant that were free from humoral or greater than 1A cellular rejection (9 versus 13 pts) were included in a two way ANOVA. Pts with postop pacemakers, atrial fib or i-blocker therapy at the time of biopsy were excluded. Results: Ischemic time was different (172 9 44 versus 142928 min, P = 0.03). Demographics, NYHA class, pre-TX hemodynamics, donor age and inotropes were similar. Cardiac output and index were higher in the total orthotopic group at 2 weeks (6.591.7 versus 5.19 1.0 l/min; 3.4 9 0.9 versus 2.89 0.6 l/min per m 2 ) and 1 year (7.19 2.0 versus 4.9 9 1.1 l/min, P = 0.002; 3.69 1.1 versus 2.69 0.5 l/min per m 2 , P= 0.009). Right atrial and pulmonary arterial mean pressure (mmHg) were lower with total orthotopic heart transplantation at 2 weeks (69 4 versus 99 5, P =0.04; 2293 versus 2597, P =0.1) and 1 year (5 92 versus 793, P =0.02; 1994 versus 259 7, P= 0.03). Pulmonary capillary wedge pressure (mmHg) was borderline nonsignificant (11 94 versus 13 97 at 2 weeks, 8 93 versus 14 95 at 1 year, P=0.055), as well as pulmonary vascular resistance (1.9 91 versus 2.59 1 at 2 weeks, 1.59 0.6 versus 2.79 1.7 WU at 1 year, P=0.051). Conclusions: Total orthotopic heart transplantation improves cardiac output and index in pts with high preoperative pulmonary vacular resistance. There is a lower mean RA and PA pressure perhaps due to less tricuspid and mitral regurgitation. In view of the frequently observed restrictive filling pattern after cardiac transplantation, total orthotopic heart transplantation can be beneficial until this pattern has subsided by preserving atrioventricular synchrony and offering better atrial transport. © 1997 Elsevier Science B.V.

Zoology, 2010

Geometric morphometric techniques were used to examine allometric and non-allometric influences o... more Geometric morphometric techniques were used to examine allometric and non-allometric influences on sexual shape dimorphism (SShD) in the ventral cranium (skull base, palate and upper jaw) of four species of lacertid lizards (Podarcis muralis, Podarcis melisellensis, Dalmatolacerta oxycephala, Dinarolacerta mosorensis). These species differ in body shape, ecology and degree of phylogenetic relatedness. The structures of the ventral cranium that were studied are directly involved in the mechanics of feeding and are connected to the jaw musculature; these structures are potentially subject to both sexual and natural selection. Allometry accounted for a considerable degree of cranial shape variation between the sexes. Allometric shape changes between individuals with smaller cranium size and individuals with larger cranium size are mostly related to changes in the skull base showing pronounced negative allometry. The rostral part, however, either scaled isometrically or showed less pronounced negative allometry than the skull base. Non-allometric intersexual shape variation predominantly involved changes related to the jaw adductor muscle chamber, i.e., changes that are associated with biomechanically relevant traits of the jaw system in females and males. Both allometric and non-allometric shape changes appeared to be species-specific. Our results indicate that natural and sexual selection may be involved in the evolution of SShD.

Cardiovascular Surgery, 1995

Superior vena cava stenosis presented as a postoperative complication of orthotopic heart transpl... more Superior vena cava stenosis presented as a postoperative complication of orthotopic heart transplantation in a patient in whom a new surgical technique was used. This alternative technique consists of total excision of the recipient's atria, with donor heart implantation performed using bicaval and pulmonary venous anastomoses. This rare complication required surgical repair 1 month after transplantation. The patient remains well on long-term follow-up. The pathogenesis, surgical management and modifications of the alternative technique to prevent this potentially serious complication are discussed.

Urology, 2012

To evaluate whether an aggressive surgical policy, which included vascular surgery with standard ... more To evaluate whether an aggressive surgical policy, which included vascular surgery with standard retroperitoneal lymph node dissection (RPLND), would be justified for managing bulky retroperitoneal growing teratoma syndrome (GTS). Data were collected retrospectively from a series of 12 patients who, from 1992 to 2010, underwent radical RPLND for bulky GTS (retroperitoneal mass≥10 cm in diameter). For complete resection, vascular procedures and nephrectomy were performed. Median tumor diameter was 100 mm before and 140 mm (range 100-300) after chemotherapy. Two patients underwent iterative RPLND. In addition to RPLND, patients underwent aortic section with aortic anastomosis (n=6), inferior vena cava resection (n=3), both the latter and the former (n=1), and aortic graft with left nephrectomy (n=2). There were no operative deaths; 3 patients had complications (25%), but none were related to extended procedures. The median hospital stay was 15 days. Median follow up was 59 months (range 10-162). One patient died of metastatic cutaneous melanoma 112 months after RPLND, 10 patients survived and are disease-free, and one patient had a para-aortic recurrence. A 100% complete resection rate, long-term survival, no mortality, and acceptable morbidity were achieved when vascular surgery and left nephrectomy were combined with standard RPLND for bulky GTS.