bluuebunny/crossref_metadata_2025 huggingface dataset:
Systems with monotone and slope restricted nonlinearities
Authors: Rǎsvan Vladimir
Published: April 2013

The paper starts from the suggestion of R. E. Kalman that additional information on nonlinearity slope may improve the sufficient conditions for absolute stability. This leads to the so called systems with augmented dynamics. Motivated also by the problem of the PIO II aircraft oscillations-self sustained oscillations induced by the saturation nonlinearities, which are both sector and slope restricted-the paper considers a generalization of the Yakubovich criterion to the case of the systems with critical and unstable linear part. The same generalization concerns a quite well known stability criterion where only slope restrictions are taken into account: the published version is improved by using all advantages of the Liapunov method and of the frequency domain stability inequalities. The results are illustrated by several applications.
The estimation of the dynamics of indirect control switching systems
Authors: Růžičková Miroslava , Kuzmych Olena , Khusainov Denys Ya.
Published: April 2013

The paper deals with the time switching hybrid systems described by nonlinear control equations with nonlinearity of a sector form. The estimation of the solution of the control system at any moment is established through the method of Lyapunov function. Both cases, stable and unstable control systems are considered. The final estimation of the solution of the hybrid system is obtained from the composition of perturbations of the separate control systems using the condition of solution continuity in the points of switching.
One more difference between measure and category
Authors: Hejduk Jacek
Published: April 2013

The first part of the paper contains some ideas of the density topologies in the measurable spaces. The second part is devoted to the difference between measure and category for the abstract density space related to the separation axioms
Brooks-Jewett-type theorems for the pointwise ideal convergence of measures with values in (l)-groups
Authors: Boccuto Antonio , Papanastassiou Nikolas , Dimitriou Xenofon
Published: April 2013

Some Brooks-Jewett, Vitali-Hahn-Saks and Nikod´ym convergence- -type theorems in the context of (l)-groups with respect to ideal convergence are proved. Moreover, an example is given.
On some new subfamilies of classical spaces of absolutely p-summable sequences
Authors: Witula Roman , Slota Damian
Published: April 2013

In this paper the properties of some new subfamilies of the spaces lp(ℂ) are discussed
A Comparison of Local Reduction and Sat-Solver Based Algebraic Cryptanalysis of Jh And Keccak
Authors: Adamček Peter , Loderer Marek , Zajac Pavol
Published: April 2013

Local reduction methods can be used to assess the resistance of cryptosystems against algebraic attacks. The assessment is based on the separation of the attack into polynomial-time reduction algorithm, and exponential time guessing and backtracking. This approach is similar to that employed by the DPLL algorithm that is used as a core of various modern SAT-solvers. In the article we show the application of this method to evaluate the strength of (reduced versions of) two chosen SHA-3 candidates: JH, and Keccak, respectively. We compare the complexity estimates with the behavior of the full search algorithm. We also compare the results based on the local reduction with the attack based on the use of SAT-solvers PrecoSAT, and CryptoMiniSAT, respectively.
Improved Zero-Knowledge Identification with Lattices
Authors: Cayrel Pierre-Louis , Lindner Richard , Rückert Markus , Silva Rosemberg
Published: April 2013

Zero-knowledge identification schemes solve the problem of authenticating one party to another via an insecure channel without disclosing any additional information that might be used by an impersonator. In this paper we propose a scheme whose security relies on the existence of a commitment scheme and on the hardness of worst-case lattice problems. We adapt a code- -based identification scheme devised by Cayrel, V´eron and El Yousfi, which constitutes an improvement of Stern’s construction. Our solution sports analogous improvements over the lattice adaption of Stern’s scheme which Kawachi et al. presented at ASIACRYPT ’08. Specifically, due to a smaller cheating probability close to 1/2 and a similar communication cost, any desired level of security will be achieved in fewer rounds. Compared to Lyubashevsky’s scheme presented at ASIACRYPT ’09, our proposal, like Kawachi’s, offers a much milder security assumption: namely, the hardness of SIS for trinary solutions. The same assumption was used for the SWIFFT hash function, which is secure for much smaller parameters than those proposed by Lyubashevsky.
Experiments with the Plaintext Space in Gentry’S Somewhat Homomorphic Scheme
Authors: Mikuš Michal
Published: April 2013

In this paper we propose an improvement of the implementation of the original Gentry-Halevi somewhat homomorphic scheme. We suggest to choose a bigger plaintext space, by changing the underlying ideal from I = (2) to I = (p) for some bigger prime p. Our analysis shows that bigger plaintext space will improve the homomorphic computation of the somewhat homomorphic scheme while it only slightly increases the complexity of the key generation procedure. The encryption and decryption functions have the same complexity. We provide also some experimental computations that support the analysis.
Is everything clear about Tako-Tsubo syndrome?
Authors: Petrov Ivo S. , Tokmakova Mariya P. , Marchov Daniel N. , Kichukov Kostadin N.
Published: April 2013

Introduction: Tako-tsubo syndrome is a novel cardio-vascular disease affecting predominantly postmenopausal women exposed to unexpected strong emotional or physical stress, in the absence of significant coronary heart disease. It is characterized by acute onset of severe chest pain and/or acute left ventricular failure, ECG-changes, typical left ventricular angiographic findings, good prognosis and positive resolution of the morphological and clinical manifestations. First described in 1990 in Japan by Sato, Tako-tsubo cardiomyopathy is characterized by transient contractile abnormalities of the left ventricle, causing typical left ventricular apical ballooning at end-systole with concomitant compensatory basal hyperkinesia. There are also atypical forms, presenting with left ventricular systolic dysfunction which affects the mid-portions of the left ventricle.

The etiology of the disease still remains unclear. Many theories have been put forward about the potential underlying pathophysiological mechanisms that may trigger this syndrome among which are the theory of catecholamine excess, the theory of multivessel coronary vasospasm, the ischemic theory, and the theory of microvascular dysfunction and dynamic left ventricular gradient induced by elevated circulating catecholamine levels.

Adequate management of Tako-tsubo syndrome demands immediate preparation for coronary angiography. Once the diagnosis is made, treatment is primarily symptomatic and includes monitoring for complications. Patients with Tako-tsubo syndrome most frequently develop acute LV failure, pulmonary edema, rhythm and conductive disturbances and apical thrombosis. Treatment is symptomatic and includes administration of diuretics, vasodilators and mechanical support of circulation with intra-aortic balloon counterpulsation.
Breast reduction with the posterosuperior pedicle: a series of 200 consecutive patients
Authors: Shipkov Hristo , Mojallal Ali , Braye Fabienne
Published: April 2013

AIM: To present and evaluate the outcomes of the posterosuperior pedicle breast reduction technique.

PATIENTS AND METHODS: 200 patients were included in the present retrospective study. They were operated on between January 2006 and January 2009. The mean age was 35.9 years (range 22 to 58 years). The average notch-to-nipple distance was 35.8 cm (range, 29 to 42 cm). The mean body mass index was 27 (range, 22 to 35 cm). Results were assessed by means of self-evaluation and by an independent 5-member jury. Fifty two patients (26%) had had bariatric surgery and 48 (24%) had had abdominoplasty. None of the patients had any previous breast surgery. All patients reported dorsal and cervical pain.

RESULTS: The mean follow-up period was 16 months (range, 13 to 23 months). The average weight resected was 981 g (range from 370 g to 1800 g). The average duration of surgery was 2h (range, 1.50 to 2.30 hours) and average length of hospital stay was 2.3 days (range, 2 to 4 days). The duration of the outpatient postoperative care until complete wound healing was 15.2 days (range, 13 to 20 days). There were 4 major complications (2%) (1 bilateral and 3 unilateral infections) treated by drainage and intravenous antibiotics. Twenty-two minor complications were recorded (11%) including one desquamation of the nipple-areola complex without necrosis (0.5%) delayed healing at the junction site of the inverted T incision in 21 cases (10.5%). One hundred and forty eight patients evaluated their results as “very good” (74%), 36 as “good” (18%), and 16 as “acceptable” (8%). There were no results assessed as “poor.” Fifty-eight percent of the patients found that back pain had totally resolved versus 42% who had signifi cant improvement though not complete resolution.

CONCLUSIONS: The postero-superior pedicle for breast reduction is a reproducible and versatile technique. The preservation of the anterior intercostal artery perforators enhances the reliability of the vascular supply to the superior pedicle.
Relative share of asymptomatic forms of hepatitis a in Plovdiv region, Bulgaria
Authors: Vatev Nikolai T. , Stoycheva Mariyana V. , Petrov Andrey I. , Atanasova Maria V.
Published: April 2013

OBJECTIVE: To study the relative share of asymptomatic forms of Hepatitis A in family reservoirs of infection with different hygienic conditions.

MATERIALS AND METHODS: Asymptomatic forms were identifi ed by detecting anti-HAV IgM using ELISA. Two types of households: with poor hygiene and with good hygiene, were studied. The study was designed as case-control. A group of Hepatitis A contact children attending day nurseries and kindergartens was also included in the study.

RESULTS: The relative share of asymptomatic forms of HAV infection in poor hygiene households was 58.62%, while in those with good hygiene it was 41.57%. The comparison using Fisher’s exact test yielded OR = 1.99 and 95% CI (P < 0.05). Asymptomatic forms were found in 7.75% of the investigated contacts among children attending day nurseries and kindergartens.

CONCLUSION: Asymptomatic forms of hepatitis A are very common which makes them epidemiologically quite signifi cant as many of the cases remain unrecognized and later become focal points of new cases of the disease. Poor hygiene conditions are likely to cause more asymptomatic forms. The high relative share of asymptomatic forms found in the households supports the need for immunoprophylaxis of the contacts.
Virulence factors and mechanisms of antibiotic resistance of haemophilus influenzae
Authors: Kostyanev Tomislav S. , Sechanova Lena P.
Published: April 2013

Haemophilus influenzae is a small gram-negative coccobacillus known as one of the major causes of meningitis, otitis media, sinusitis and epiglottitis, especially in childhood, as well as infections of the lower respiratory tract, eye infections and bacteremia. It has several virulence factors that play a crucial role in patient infl ammatory response. Its capsule, the adhesion proteins, pili, the outer membrane proteins, the IgA1 protease and, last but not least, the lipooligosaccharide, increase the virulence of H. infl uenzae by participating actively in the host invasion the host by the microrganism. Some of these factors are used in vaccine preparations. In the post-vaccine era, an increase has been noticed in many European countries of invasive infections caused by non-encapsulated strains of H. influenzae which have a number of virulence factors, some of which are subject of serious research aiming at creating new vaccines. Numerous mechanisms of antibiotic resistance in H. infl uenzae are known which can compromise the empirical treatment of infections caused by this microorganism. The increasing incidence of resistance to aminopenicillins, induced not only by enzyme mechanisms but also by a change of their target is turning into a signifi cant problem. Resistance to other antibiotics such as macrolides, tetracyclines, chloramphenicol, trimethoprim/sulfamethoxazole, and fl uoroquinolones, commonly used to treat Haemophilus infections has also been described.
Some epidemiological features of the mediterranean spotted fever re-emerging in Bulgaria
Authors: Baltadzhiev Ivan G. , Popivanova Nedyalka Iv..
Published: April 2013

INTRODUCTION: The Mediterranean spotted fever (MSF), caused by Rickettsia conorii conorii strain Malish, is transmitted by the brown dog tick Rhipicephalus sanguineus. In Bulgaria, cases of MSF occurred in two epidemic waves, the fi rst in 1948-1970, (after there were no report of new cases more than for 20 years) and the second started in 1993 and is still going on.

The AIM of the study was to investigate the epidemiological characteristics of the re-emerging MSF in Plovdiv city and its suburbs, which is the largest endemic region in the country.

MATERIALS AND METHODS: The MSF patients treated between 1993 and 2011 were 1254. MSF was confi rmed by immunofl uorescent assay (IFA) in the Reference Rickettsioses Laboratory. Descriptive and analytic epidemiological methods were used to determine the routes and ways of infection, the epidemiological locus, seasonality, patients‘ age, gender and social structure, and the clinical severity of the cases.

RESULTS: We established that MSF spread in the region in two distinct phases: from 1993 to 2003 during which the disease was increasingly spreading and the second phase taking place from 2004 till 2011 during which the disease was gradually decreasing. The incidence is between 0.13 and 25.62, mean 10.91 per 100 000 populations (11.88 and 9.56 per 100 000 populations for phases I and II, respectively); between 1.14% and 6.25% of the infected people died (mean 2.07%, 3.46% and 1.25% for phases I and II, respectively). The age distribution of patients shows predominance of 40-59-year-olds (31.66%), reaching a peak in patients older than 60 years (37.5%). Children and adolescents under 19 years are less affected (18.12%), while the least affected are the young adults between 20-39 (12.7%). Urban population is almost twice as affected as rural population regardless of the gender. The disease has summer seasonality, peaking in August. Eschar (tache noire) was found in 77.91% of the patients. Despite the decline and predominance of mild forms (43.12%), the re-emerging MSF still presents with lots of severe forms (11.45%) and malignant forms (8.54%), which makes almost one fi fth of all patients to be at serious risk of getting ill with a severe disease with complications and possible fatal outcome.

CONCLUSION: Almost two decades after it re-emerged in Bulgaria, MSF is still potentially active despite the decreasing incidence and mortality rate. During the phase of decline, the re-emerging MSF kept the basic epidemiologic characteristics it had in the fi rst phase of rapid increase. The epidemiologic characteristics of MSF in the region are in support of its prevention and control.
Functional reconstruction of subtotal glossectomy defects with radial forearm free flap: case report and review of literature
Authors: Pazardzhikliev Dimitar D. , Shipkov Christo D. , Yovchev Ilya P. , Khater Regina H. , Kamishev Ivailo S.
Published: April 2013

Adequate reconstruction of defects that are consequences of glossectomy is of primary importance for achieving satisfactory functional results and improving the quality of life.

AIM: The aim of this study was to report a case of free flap reconstruction of a subtotal glossectomy defect and discuss it in relation to other available methods.

CASE REPORT: A 48- year-old woman was operated on for a T4N0M0 squamous cell carcinoma of the tongue. A subtotal glossectomy via mandibular swing procedure with bilateral supraomohyoid neck dissection and reconstruction with a radial forearm free flap (RFFF) was performed. Surgery was followed by adjuvant radiotherapy.

RESULTS: The post-operative period was uneventful. The patient resumed intelligible speech evaluated as “excellent” and oral feeding. The donor site morbidity was acceptable. Present reconstructive options of the tongue include two categories: to maintain mobility or to provide bulk. In glossectomy with 30 to 50 percent preservation of the original musculature, maintaining the mobility of the remaining tongue by a thin, pliable flap is preferred. This can be achieved by infrahyoid myofascial, medial sural artery perforator flap, RFFF, anterolateral thigh and ulnar forearm flap. When the post-resectional volume is less than 30 percent of the original tongue, the reconstruction shifts to restoration of bulk to facilitate swallowing by providing contact of the neotongue with the palate. Flaps providing bulk include the free TRAM flap, latissimus dorsi myocutaneous free flap, pectoralis major musculocutaneous flap and trapezius island flap.

CONCLUSION: Surgical treatment of advanced tongue cancer requires adequate reconstruction with restoration of speech, swallowing and oral feeding. Free tissue transfer seems to achieve superior functional results with acceptable donor site morbidity when indicated.
Neurocognitive Impairments In Brain Tumor Patients
Authors: Kehayov Ivo I. , Kitov Borislav D. , Zhelyazkov Christo B. , Raykov Stefan D. , Davarski Atanas N.
Published: April 2013

There is an increased scientific interest in cognitive impairments caused by brain tumors during the last decade. It has lead to the introduction and routine clinical usage of neuropsychological test batteries in brain tumor patients, thus making them an important clinical measure for the assessment of the efficacy of the different treatment regimens such as surgery, radiotherapy and chemotherapy. The effect of cognitive deficit on patients’ quality of life and survival has been unequivocally proven. These are among the most common neurological symptoms associated with brain tumors. The improvement in cognitive function and delay in neurocognitive decline are acceptable endpoints in clinical trials. Cognition has been demonstrated to be an independent predictor of survival in patients with cerebral neoplasms.
Attitudes Toward Antipsychotic Medication, Insight and Psychopathology in Outpatients with Schizophrenia
Authors: Vassileva Iglika V. , Milanova Vihra K.
Published: April 2013

OBJECTIVE: Attitude toward antipsychotic medication is considered as one of the main predictors for medication adherence in schizophrenia. The present non-interventional crosssectional study aims to explore the associations between attitudes toward antipsychotic medication, insight and other clinical variables in outpatients with schizophrenia.

METHOD: Attitudes toward antipsychotic medication, clinical and social variables, sociodemographic and illness-related characteristics were assessed via a set of semi-structured clinical interviews and self-rating scales in a total of 226 patients with schizophrenia on a long-term antipsychotic treatment in community based settings. The associations between attitudes toward medication and severity of psychopathology, insight and medication side effects were examined.

RESULTS: The greater hospitalization rate in the previous year was associated with more severe psychopathology at the time of the study, more pronounced side effects of the therapy and lack of insight. The lack of insight, the presence of more severe negative and depressive symptoms and disease duration less than 5 years correlated significantly with negative attitudes toward antipsychotic medication. The severity of medication side effects was not associated with the drug attitudes.

CONCLUSION: Psychoeducational and psychotherapeutical interventions, along with pharmacotherapy, can be beneficial in forming positive attitudes toward medication and improving medication adherence in schizophrenia, especially in patients with a short duration of the disease.
Bilateral Simultaneous Isthmic Ectopic Pregnancy After Clomiphene Induction
Authors: Pehlivanov Blagovest K. , Amaliev Georgi I. , Malinova Maria L. , Amaliev Ilia G.
Published: April 2013

A rare case of a 32-year-old patient with simultaneous bilateral isthmic tubal pregnancy. A 32-year-old woman with a 3-year history of primary infertility was admitted with light vaginal bleeding and mild abdominal pain. She was 41 days after her last menstruation and 23 day after intrauterine insemination with her husband’s sperm. Clomiphene citrate (CC) was used for the induction of ovulation. In cases of ectopic pregnancy with ovulation induced by CC, doctors must be aware of the possibility of bilaterality.
Pseudo-nitzschia Peragallo (Bacillariophyceae) diversity and domoic acid accumulation in tuberculate cockles and sweet clams in M’diq Bay, Morocco
Authors: Rijat Leblad Benlahcen , Lundholm Nina , Goux Didier , Veron Benoît , Sagou Regia , Taleb Hamid , Nhhala Hassan , Er-Raioui Hassan
Published: April 2013

The diversity of Pseudo-nitzschia (Bacillariophyceae) and accumulation of the neurotoxin domoic acid (DA) in two types of shellfish; tuberculate cockles (Acanthocardia tuberculata) and sweet clams (Challista chione) was explored in M’diq Bay,Morocco during 2007. The highest abundances of Pseudo-nitzschia were found during the period from March to October, with peaks occurring in May and September. Toxin analysis showed an accumulation of domoic acid in shellfish sampled during spring and autumn. The maximum toxin concentration was 4.9 mg DAg-1 of the whole tissue recorded in sweet clam during spring. Using transmission electron microscopy, thirteen Pseudo-nitzschia species were identified, eight of which are known as producers of domoic acid: P. multistriata, P. cuspidata, P. galaxiae, P. multiseries, P. pseudodelicatissima, P. pungens var. aveirensis, P. calliantha and P. fraudulenta. The five non- toxic species observed were P. subpacifica, P. arenysensis, P. dolorosa, P. subfraudulenta, and P. cf. caciantha
Chemical composition and antioxidant potential of Acacia leucophloea Roxb
Authors: Zia-Ul-Haq Muhammad , Ćavar Sanja , Qayum Mughal , Khan Inamullah , Ahmad Shakeel
Published: April 2013

The aim of this study was to evaluate the compositional and nutritional potential of methanolic extracts of various parts of Acacia leucophloea Roxb. concerning the chemical composition and antioxidant potential of which limited information is available. Compositional studies indicated carbohydrates as major components in both seed and pods. Despite differences in mineral content among the leaves, pods and seeds, calcium was found in the highest amount and zinc in the lowest. The amino acid profile indicated aspartic acid as the major amino acid and proline as the minor. Among protein fractions, globulin was present in higher amounts than other fractions. Linoleic acid was the major fatty acid detected in the oil from both pods and seeds, while g-tocopherol was the major component of the tocopherol observed from same oil. Moreover, significant antioxidant potential was observed from the extracts of all three parts investigated. The results obtained in this study clearly indicate that A. leucophloea has a sufficient potential for use as a natural antioxidant agent. Further phytochemical studies will be performed for specification of the biologically active principles.
The orchid Ophrys speculum Link (Orchidaceae) in Croatia
Authors: Vuković Nina , Tommasoni Annalisa , D'onofrio Tancredi
Published: April 2013

The orchid Ophrys speculum Link is widely distributed in the Mediterranean. Since its inclusion in the checklist of Croatian flora, the species has not been confirmed in the field, but has recently been found on Cape (rt) Kamenjak, southern Istria. Afew plants were growing within garrigue vegetation of Cisto-Ericetalia.
First Record of the Backswimmer Notonecta Meridionalis (Hemiptera: Heteroptera: Notonectidae) in Romania
Authors: Berchi Gavril Marius , Kment Petr , Petrovici Milca
Published: April 2013

Notonecta meridionalis Poisson, 1926 is present in almost all circum-Mediteranean countries and shouthern parts of Central Europe. First record of this species from Romania is given.
Reviews/Interviews
Authors: Sumera Adam , Pietrzak Wit , Kocot Monika , Faqir Fadia , Assif Maria , Ravvin Norman , Majer Krzysztof
Published: April 2013

Adam Sumera: Capital Ellowen Deeowen: A Review of The Making of London: London in Contemporary Literature by Sebastian Groes (Houndsmills: Palgrave-Macmillan, 2011)
Wit Pietrzak: Deconstruction and Liberation: A Review of Simon Glendinning’s Derrida (New York: Oxford UP, 2011)
Monika Kocot: Authenticity, Transdifference, Survivance: Native American Identity (Un)Masked: A Review of Native Authenticity: Transnational Perspectives on Native American Literary Studies, ed. Deborah L. Madsen (Albany: State U of New York P, 2010)
Fadia Faqir Speaks with Maria Assif: Literature, the Arab Diaspora, Gender and Politics
Norman Ravvin Talks to Krzysztof Majer: Absent Fathers, Outsider Perspectives and Yiddish Typewriters
Diet composition of the scops owl (Otus scops) in central Romania
Authors: Latková Hana , Sándor Attila K. , Krištín Anton
Published: April 2013

Insect diversity correlates negatively with increasing management intensity of grasslands and with latitude. We supposed that similar patterns might be found in the diet spectra of insectivorous birds. The diet composition of the insectivorous scops owl was studied by analysing the prey remnants collected from 21 nests during 2008-2009 in an extensively cultivated rural area in the centre of the owl’s distribution range in Central Romania. Altogether 831 prey items belonging to 45 prey taxa were identified. Similarly to the other parts of the scops owl range, orthopterans were high dominant prey items (86.8%) - especially bush-crickets Tettigoniidae (78.6%). In food samles were found also beetles (Coleoptera, 5.7%) and rarely spiders Araneidea, moths Lepidoptera, mantids Mantodea, Hymenoptera and Neuroptera (<1 .5%). Vertebrates were rarely represented by rodents (2.5%) and passerines (1 .3%). The following diagnostic prey species were identified in 20 nests using the MDFM method: bush-crickets Tettigonia viridissima, Decticus verrucivorus, Metrioptera bicolor and other species of the family Tettigoniidae, the beetle Onthophagus spp., the cricket Gryllus campestris and other unidentified beetles Coleoptera g. sp. Furthermore, the scops owl’s diet in different parts of its range was compared.

As expected, there were more Orthoptera and generally more prey taxa in food in the range centre than at its northern limit.
Modelling of multi-layer materials cutting
Authors: Zębala Wojciech
Published: April 2013

Modelling of multi-layer materials cutting

The paper presents some aspects of modelling of multi-layer materials cutting process. Numerical calculation with the finite element method (Lagrangian equations) were performed for the decohesion process simulation of the example workpieces (machined with one tool wedge) consisted of two and three layers with different mechanical properties. Results of calculation in the form of colour maps of temperature and plastic strain fields distributions in the cutting zone are presented. An example course in time of the main cutting force components, during wedge tool passage through the different layers of the cutting material, is presented.
Skeleton-based 3D Surface Parameterization Applied on Texture Mapping
Authors: Madaras Martin , Ďurikovič Roman
Published: April 2013

Assume a 2D manifold surface topologically equivalent to a sphere with handles we propose a novel 3D surface parametrization along the surface skeleton. First, we use a global mapping of the surface vertices onto a computed skeleton. Second, we use local mapping of the surrounding area of each skeleton segment into a small rectangle whose size is derived based on the surface properties around the segment. Each rectangle can be textured by assigning the local u;v texture coordinates. Furthermore, these rectangles are packed into a large squared texture called skeleton texture map (STM) by approximately solving a palette loading problem. Our technique enables the mapping of a texture onto the surface without necessity to store texture coordinates together with the model data. In other words it is enough to store the geometry data with STM and the coordinates are calculated on the fly.
An Efficient Legendre Pseudospectral Method for Solving Nonlinear Quasi Bang-Bang Optimal Control Problems
Authors: Tohidi Emran , Lotfi Noghabi Somayyeh
Published: April 2013

In this paper, an efficient Legendre pseudospectral approach for the accurate solution of nonlinear quasi bang-bang optimal control problems (OCPs) is investigated. In this approach, after linearizing the dynamical system, control and state functions are considered as piecewise constant and piecewise continuous polynomials, respectively, and the switching points are also taken as decision variables. Furthermore, for simplicity in discretization, a integral formulation of the dynamical equations is considered. Thereby, the problem is converted into a mathematical programming problem which can be solved by well-developed parameter optimization algorithms. Through a numerical implementation we show the efficiency of the proposed method via comparing with a classical pseudospectral method and other discretization approaches.
Heating of the Natural Gas at the Gas-distributive Installation
Authors: Savchenko Olena , Balins’kyi Ivan , Shpak Grygoriy
Published: April 2013

Heating of natural gas on the gas-distributive installations is carried out for prevention of creation of gas hydrates in gas pressure controller. There are a few methods of heating of natural gas: complete heating of gas and heating of gas pressure controller. The indicated methods have a row of failings, the delivered from which is possible at the use of vortex tube. Work of vortex tube consists of the simultaneous making of two streams: heated and frappe. The heated stream is used for a serve on a gas pressure controller which shuts out it freezing. Little price, insignificant sizes, absence of motive details helps to use a vortex tube for heating of natural gas on the gasdistributive installations.
Mechanical Model of Steel-concrete Composite Joint under Sagging Bending Moment
Authors: Pisarek Zdzisław
Published: April 2013

In buildings with steel-concrete composite floors, joints are designed to transmit mainly hogging bending moment. In case of the large horizontal loads due to wind, earthquake or accidental events, sagging bending moments in a joint can also occur. Additionally, large deformations of the structure cause tying and prying effects. In the paper, a mechanical model based on “component method” for evaluation of characteristics of the composite joint is presented. The influence of tying and prying actions on distribution of the internal forces in a joint is also analyzed. The procedure for calculation of the characteristics of the composite joint with bolted endplate connection is elaborated too.
The Characteristics of Air Swirl Supply Device
Authors: Voznyak Orest , Sukholova Iryna , Myroniuk Khrystyna
Published: April 2013

In this article results of experimental investigations of air supply into the room by air distribution device which creates swirl air jets for creation more intensive turbulization air flow in the room are presented. Experimental investigations in order to composed matrix were carried out; graphycal dependences have been obtained as well three-factor chart has been designed. Obtained results of these investigations give possibility to realize engineer calculations of air distribution with swirl air jets.
Effects of Afforestation with Pines on Collembola Diversity in the Limestone hills of Szárhalom (West Hungary)
Authors: Winkler Dániel , Tóth Viktória
Published: April 2013

- We investigated the responses of collembolan communities to pine afforestation in an area formerly characterized by a mosaic of autochthonous downy oak woodland and steppe meadows. Study sites were selected in mixed stands of black pine and Scots pine and control samples were taken from downy oak stands and open steppe meadows. A total of 1884 Collembola specimens belonging to 66 species were collected. Three species, namely Protaphorura pannonica (Onychiuridae), Tomocerus mixtus (Tomoceridae) and Isotoma caerulea (Isotomidae) proved to be new to the Hungarian fauna. There are typical Collembola communities which are specific to different habitat types where species of a given composition can only or predominantly be found in that habitat, as well as some basic common species which occur in every habitat. The highest species richness (41) was found in steppe meadows, considerably lower (34) in downy oak forests, reaching the lowest value (25) in pine plantations. Although several forest species present in the oak woodland were completely missing from the pine forests, there was no significant difference between the Collembola diversities of the two forest habitats. The difference became more prominent in collembolan abundance which resulted in less than half of individuals/m2 in pine plantations compared to the soils of downy oak forests, most likely due to the changed soil conditions, especially of humus characteristics, caused by the pine needle litter. Jaccard similarity measure indicated approximately equal similarity (0.24-0.28) for paired comparison, suggesting that a relatively constant 'basic Collembola community' determined by the soil type typical for the area is present; while dissimilarity in communities between sites are partly provided by spatial heterogeneity of open and forest habitats and by the difference of the vegetation type.
Springtime Leaf Development of Mature Sessile Oak Trees as Based on Multi-Seasonal Monitoring Data
Authors: Oláh Viktor , Szőllősi Erzsébet , Lakatos Ágnes , Kanalas Péter , Nyitrai Balázs , Mészáros Ilona
Published: April 2013

Abstract -

Based on a four year leaf growth data-set we modelled the thermal time-dependent leaf ontogeny in upper and lower canopy layers of mature sessile oak trees, in a Quercetum petraeae-cerris forest stand (NE Hungary). Our regression models revealed no considerable differences between the timing of leaf unfolding and leaf expansion of different canopy layers. On the other hand seasonal course in leaf mass-to-area ratio (LMA) indicated that sun leaves needed considerably longer thermal time to fully develop their anatomical structures compared to shade leaves. LMA of sun leaves was higher during the whole leaf maturation process suggesting that ‘sun’ and ‘shade’ characteristics develop in very early stage of leaf ontogeny. Functioning of photosynthetic apparatus (Fv/Fo) in shade leaves have built up faster and performed better in all developmental stages which could be attributed to two main factors: 1) very early determination of leaf traits as a function of light environment and 2) evolving shading effect of upper canopy layer eliminates photoinhibition in lower leaves.
Genetic Variability of two Fagus sylvatica (L.) Populations in the South-Western Edge of the Panonnian Plain
Authors: Božič Gregor , Kutnar Lado
Published: April 2013

- Two beech populations at altitudes of 273 m (Vrhovo) and 657 m (Kozarje), growing on significantly different forest site, in different ecological conditions and with different forestmanagement history were selected on Gorjanci Mountains and genetically investigated by means of isoenzyme analysis. A cline from minor to major allelic polymorphism was revealed at gene loci Aco- B, Idh-A and 6-Pgdh-A. At locus Skdh-A, allele A4 was observed only at the lower altitude population Vrhovo as a heterozygote genotype Skdh-A34 (12%). The Kozarje population of beech had a slightly higher genetic multiplicity, a slightly higher effective number of alleles per locus, higher observed heterozygosity and a higher level of intrapopulation differentiation. Statistically significant differences in the occurrence of alleles between populations were found at 5 of 16 loci. The average genetic distance of Gregorius (1974) was 6.1%. European beech populations analyzed from different altitudes on Gorjanci Mountains appeared to be genetically differentiated. The results presented are also discussed in the light of the climate change impact on forests.
Storage Problems of Poplar Chips from Short Rotation Plantations with Special Emphasis on Fungal Development
Authors: Horváth Zsuzsanna , Marosvölgyi Béla , Idler Christine , Pecenka Ralf , Lenz Hannes
Published: April 2013

Abstract -

There are several problems in storing wood chips freshly harvested from short rotation plantations, which result in quality losses as well as in dry matter and energy losses. The factors influencing the degradation of raw material are examined in this paper with special focus on fungal development. An excessive growth of fungi is connected to dry matter losses and also to an increased health risk during raw material handling.

The following factors were measured during 6 months storage of poplar wood chips depending on particle size: box temperature, moisture content, pH-value, appearance of fungi in the storage and the concentration of fungal particles in the air. The results show a close connection between particle size, temperature and attack of fungi. During the storage mesophilic and termophilic species of the genera Alternaria, Aspergillus, Cladosporium, Mucor and Penicillium appeared. The concentration of fungal particles is the highest for fine chips and decreases in bigger particles. There was a special focus on the investigation of the properties of coarse chips (G 50), which represent a good compromise between handling, storage losses and health risk due to fungal development.
Prediction of woven fabric properties using software protkatex
Authors: Kolčavová Sirková Brigita , Mertová Iva
Published: April 2013

Fabric properties and fabric structure prediction are important in each industry domain. Generally all professional
CAD packages for woven textiles system will be able to achieve basic fabric simulation and production output. A
good CAD system should enable you to create design (dobby and jacquard woven fabric) ideas quickly and easily
to enhance the way you work. The differences among competing systems fall mainly into the following categories:
ease of use; speed of operation; flexibility of operation; advanced features; technical support; and ongoing software
development. Computer simulation or prediction is oriented on standard woven fabrics, technical textiles, and
composites. This article focuses on the presentation of software ProTkaTex and its use in the prediction of woven
fabric properties. The software implements a generalized description of the internal structure of woven fabric on
the unit cell level, integrated with mathematical models of the fabric relaxed state. User can calculate selected
mechanical and end-use properties of dobby and jacquard woven fabric as well as can evaluate fabric behavior
before real weaving. The major challenge is to develop software that industry will use in design centers for creation
and development of new fabric structures for technical as well as clothing application.
Ethical issues of diagnosis and therapy in patients with HIV-AIDS and Tuberculosis
Authors: Cambrea Claudia Simona , Arghir Oana Cristina , Halichidis Stela
Published: April 2013

Like medicine, ethics is a practical discipline, which they acquire the knowledge of the general principles and skills to solve problems. Long term care involves both clinical and ethical issues in medicine. Effective medical education of long-suffering patients has to be focusing on increasing their adherence to treatment. The occurrence of AIDS pandemic has changed the physician’s way of thinking in terms of ethics in general, and in medicine in particular. HIV/AIDS has focused attention on deficiencies in the field of therapy, long care issues, medical training and education of the patients, as well as in deontology. The treatment of HIV infected patients with all new drugs discovered is not yet completely curative and the association of opportunistic infections, as tuberculosis (TB), is representing a permanent challenge for therapist.

Both ethical and medical training in general as regards AIDS and TB, should focus mainly on exposed people and learning through experience, to form skills that would make doctors to work with sensitivity in regard to sexuality, substance abuse, lack of treatment, relapses of disease and even death. In the same time, any ethical or cultural environment can enrich and support the real moral education of medical staff.

Medical ethics and ethics relating specifically to TB and HIV/AIDS, often meet highly complex problems. Alternative possibilities and decisions to take of what is right or wrong may create a real ethical, clinical and therapeutic dilemma.
Study of density and viscosity for ternary mixtures biodiesel+diesel fuel + bioalcohols
Authors: Nita Irina , Geacai Sibel
Published: April 2013

The increase of the environment pollution, together with the instable price of crude oil led in the last years to a renewed focus on biofuels. As the demand in the transport sector is continuously increasing, and taking into account the benefits of biofuels, it is expected that the market demand for biofuels to be increased in the near future. In this context, it will be interesting to investigate if new types of biofuels could be used as mixtures with other fuels for internal combustion engines. The aim of this paper is the study of density and viscosity variation with composition and temperature for ternary mixtures biodiesel + diesel fuel + bioalcohol. Experimental densities and viscosities data for ternary blends diesel fuel+biodiesel +isopropyl alcohol/1-butyl alcohol are presented, and some empirical models proposed to predict these properties for binary systems diesel fuel+biodiesel are evaluated for the proposed ternary blends.
In vitro Interaction of Nandrolone with Calcium Nitrate, Magnesium Sulfate and Potassium Permanganate in Aqueous Medium
Authors: Afzal Mehedi , Sultan Md Zakir , Begum Rehana , Rahman Asma , Amran Md Shah , Hossain Md Amjad
Published: April 2013

Nandrolone is an anabolic steroid drug that increases production and urinary excretion of erythropoietin. The drug is indicated with calcium nitrate, magnesium sulfate and potassium permanganate as concomitant uses. Therefore, there is a chance of interactions during concomitant use. Hence, we evaluated the interactions monitored by UV, conductometric titration and Ardon's spectrophotometric methods of nandrolone with calcium nitrate, magnesium sulfate and potassium permanganate at the ratio of 1: 1 at different pHs. It was found that nandrolone did not form any stable complexes at the ratio of 1:1 with the above mentioned salts. DOI: http://dx.doi.org/10.3329/dujps.v11i2.14554 Dhaka Univ. J. Pharm. Sci. 11(2): 93-99, 2012 (December)
A Comparative Study on Antioxidant Properties of Two Phyllanthus Species Growing in Bangladesh
Authors: Nimmi Ishrat , Jahan Ismet Ara , Hossain M Hemayet , Uddin Mohammad Burhan , Rana M Sohel , Haq Muhammad Mahbubul
Published: April 2013

A comparative study of antioxidant properties on two varieties of Phyllanthus (Phyllanthus niruiri L. & Phyllanthus urinaria L. leaves) growing in Bangladesh was done in the present study. Five complimentary test methods namely DPPH free radical scavenging activity, reducing power assay, total antioxidant capacity, total phenolic and flavonoid contents determination were used for the evaluation of antioxidant properties of two species of Phyllanthus. In the present investigation for the evaluation of antioxidant activities the concentration is expressed by the ratio of crude sample per solvent volume instead of extract weight per solvent volume. Based on these concentrations the investigated P. niruri L. and P. urinaria L. leaves extracts exhibited significant results. At 2 mg/ml concentration DPPH radical scavenging capacity of the methanol extract of both the plants was found to show significant (>90%) activity which is comparable to Ascorbic acid and BHA. In case of reducing power tests for both the extract, the activity of P. urinaria is comparable to that of BHA and AA and that of P. niruiri is comparable to BHA. P. niruiri showed better antioxidant potential than that of P. urinaria based on the observed results of their corresponding methanol extract. DOI: http://dx.doi.org/10.3329/dujps.v11i2.14579 Dhaka Univ. J. Pharm. Sci. 11(2): 191-197, 2012 (December)
Le Moustérien à denticulés des années cinquante à nos jours : définitions et caractérisation
Authors: Thiébaut Céline
Published: April 2013

La présente contribution s’intègre dans une démarche qui tend à tester, à l’aide de nouveaux outils méthodologiques (technologie lithique, approche interdisciplinaire), la pertinence d’un ensemble typologique identifié comme l’un des faciès du Moustérien par F. Bordes dans les années cinquante. Nous proposons de dresser un bilan historiographique des recherches qui se sont concentrées sur l’identification des caractéristiques du Moustérien à denticulés et sur son interprétation au sein des industries du Paléolithique moyen. Malgré l’absence d’une caractérisation précise, le Moustérien à denticulés fut considéré comme un ensemble homogène. Les industries lithiques qu’il regroupe ont été interprétées soit comme la production d’un groupe humain aux traditions culturelles propres, soit comme le reflet d’une activité spécifique ou celui d’une phase chronologique, ou encore comme le résultat d’une adaptation des groupes humains préhistoriques à leur environnement. Nous présentons ensuite une synthèse de nos récents résultats. Ces derniers s’appuient sur l’analyse taphonomique et techno-économique de plusieurs séries françaises de Moustérien à denticulés, replacées dans leur contexte économique et environnemental, et sur une analyse critique des données bibliographiques disponibles. Ils mettent en évidence la présence de caractères communs aux différents ensembles mais aussi l’existence de certaines variations typologiques et de différences techniques et économiques. Ainsi, le Moustérien à denticulés n’apparaît pas comme un ensemble complètement homogène et cohérent puisqu’il englobe des séries aux caractéristiques techno-économiques variées parfois diversifiées. De fait, il semble difficile de le considérer comme le reflet d’un phénomène unique.
L'enclos funéraire de l'Âge du Bronze de Saint-Martin-de-Fontenay (Calvados, Basse-Normandie)
Authors: Germain-Vallée Cécile , Giraud Pierre , Durand Raphaël
Published: April 2013

L’enclos funéraire de Saint-Martin-de-Fontenay est un monument circulaire simple à fossé continu de 19 m de diamètre. Deux urnes cinéraires, dont une exceptionnellement bien conservée pour la région, ont été mises au jour dans l’aire centrale de l’enclos, permettant d’attribuer ce monument à l’Âge du Bronze moyen ou au début du Bronze final. L’analyse spatiale des deux vases et l’étude du fossé, notamment de son comblement, par le biais de la micromorphologie, ont permis de proposer un certain nombre d’hypothèses, d’une part sur la morphologie du monument avec la présence d’un talus périphérique et d’un tertre central, d’autre part sur son fonctionnement avec l’identification de deux phases d’utilisation différentes.