bluuebunny/crossref_metadata_2025 huggingface dataset:
DemoImpact: Modeling, Forecasting and Managing the Impact of Major US Sociodemographic Trends on Multi-Category Snack Consumption
Authors: Girju Marina M , Adams Michelle J , Ratchford Brian
Published: July 2010

The US population is changing dramatically, e.g. aging, migrating, becoming more racially diverse and overweight, etc. We examine how these major shifts affect snack consumption and, therefore, how Consumer Packaged Goods (CPG) manufacturers should adjust their business-as-usual practices. We present the development and implementation of DemoImpact, a consumption forecasting model and decision support system for all snacks available on the US market (900+). It captures the effects of 48 demographic variables (age, gender, marital status, obesity, education, income), and accounts for the effects of significant holidays and seasons. DemoImpact is built on 6 years of historical snack consumption and uses the US Census demographic predictions to forecast consumption frequency and volume. The model was implemented at a leading CPG company and forecasted consumption well. The DSS enables top and mid-level managers first to understand how the consumer is changing, and then how to prepare for the change in tastes and how to develop accurate forecasts. DemoImpact has been used, validated and extended since 2006. We show how the CPG manufacturer embraced the results of the model, adjusted its business strategy and impacted retailers in its sales channel.
A Fast Restoration Strategy in Distribution Systems Using an Enhanced Differential Evolution Approach
Authors: Huang Chao-Ming , Hsieh Cheng-Tao , Huang Yann-Chang , Wang Yung-Shan
Published: July 2010

This paper proposes a fast restoration strategy of distribution systems using an enhanced differential evolution (EDE) approach. Service restoration of distribution systems is an emergent task that must be performed rapidly by the system operators. Basically, it is a complicated combinatorial optimization problem, often having many candidate solutions to be evaluated by the operators. To improve the efficiency of restoration and reduce the burden on the operators, this paper proposes an EDE method combining variable scaling differential evolution (VSDE) algorithm and ant system (AS) to solve the combinatorial optimization problem. To verify the effectiveness of the proposed method, a typical distribution system of the Taiwan Power Company (TPC) was tested and compared with the existing methods. The results show the proposed method was superior to the existing methods in terms of convergence time and the obtained restoration plan.
Distributional Implications of Alternative U.S. Greenhouse Gas Control Measures
Authors: Rausch Sebastian , Metcalf Gilbert E. , Reilly John M , Paltsev Sergey
Published: July 2010

We analyze the distributional and efficiency impacts of different allowance allocation schemes motivated by recently proposed U.S. climate legislation for a national cap and trade system using a new dynamic computable general equilibrium model of the U.S. economy. The USREP model tracks nine different income groups and twelve different geographic regions within the U.S. We find that the allocation schemes in all proposals are progressive over the lower half of the income distribution and proportional in the upper half of the income distribution. Scenarios based on the Cantwell-Collins allocation proposal are less progressive in early years and have lower welfare costs due to smaller redistribution to low income households and, consequently, lower income-induced increases in energy demand and less savings and investment. Scenarios based on the three other allocation schemes tend to overcompensate some adversely affected income groups and regions in early years, but this dissipates over time as the allowance allocation effect becomes weaker. Finally, we find that carbon pricing by itself (ignoring the return of carbon revenues through allowance allocations) is proportional to modestly progressive. This striking result follows from the dominance of the sources over uses side impacts of the policy and stands in sharp contrast to previous work that has focused only on the uses side. The main reason is that lower income households derive a large fraction of income from government transfers, and we hold the transfers constant in real terms, reflecting the fact that transfers are generally indexed to inflation. As a result, this source of income is unaffected by carbon pricing while wage and capital income is affected.
Quantifying the Cost of Risk in Consumption
Authors: Tirelli Mario , Turner Sergio
Published: July 2010

Fixing a risky intertemporal, interagent consumption profile, its total cost is the total willingness to pay for smoothing everyone's consumption. It decomposes into a micro cost that captures the inefficiency in the cross-sectional distribution of total consumption, risky as it is, and a macro cost that captures the additional benefit of eliminating the risk in total consumption, once efficiently redistributed.We consider the risk that a household experiences income mobility and the consequent consumption mobility. U.S. panel data estimates a consumption profile for which we compute the costs. The total cost is 9-18% of total initial consumption for CRRA parameters 1.25-3.5. Of this, 80-90% is the micro cost and only 10-20% is the macro cost. The magnitude of these results, and in particular the relative importance of the micro cost, is in line with previous empirical evidence.Motivated by this evidence we develop the theory of micro cost. Moreover, because the micro cost does not admit a closed form, for general preferences, we lay out an approximation method.
Involvement of ubiquitous and tale transcription factors, as well as liganded RXRα, in the regulation of human SOX2 gene expression in the NT2/D1 embryonal carcinoma cell line
Authors: Milivojevic Milena , Nikcevic Gordana , Kovacevic-Grujicic Natasa , Krstic A. , Mojsin Marija , Drakulic Danijela , Stevanovic Milena
Published: July 2010

SOX2 is a key transcription factor in embryonic development representing a universal marker of pluripotent stem cells. Based on the functional redundancy and overlapping expression patterns of SOXB1 subgroup members during development, the goal of this study has been to analyze if some aspects of regulation of expression are preserved between human SOX2 and SOX3 genes. Thus, we have tested several transcription factors previously demonstrated to play roles in controlling SOX3 gene activity for potential participation in the regulation of SOX2 gene expression in NT2/D1 cells. Here we report on the activation of SOX2 expression by ubiquitous transcription factors (NF-Y, Sp1 and MAZ), TALE family members (Pbx1 and Meis1), as well as liganded RXR?. Elucidating components involved in the regulation of SOX gene expression represent a valuable contribution in unraveling the regulatory networks operating in pluripotent embryonic cells.
Frequency of aberrant promoter methylation of p15INK4b and O6-methylguanine-DNA methyltransferase genes in b-cell non-Hodgkin lymphoma: A pilot study
Authors: Kraguljac-Kurtovic Nada , Krajnovic Milena , Dimitrijevic B. , Mihaljevic Biljana , Gotic Mirjana , Krtolica Koviljka
Published: July 2010

The methylation status of the target promoter sequences of p15INK4B (p15) and O6-methylguanine-DNA methyltransferase (MGMT) genes was studied by methylation-specific PCR in 10 adult patients with de novo B-cell non- Hodgkin lymphoma (B-NHL). The aberrant hypermethylation of the p15 gene was more frequent (50%) compared to the hypermethylation of the MGMT gene (30%), and was detected in different types of B-NHL in both genes. Hypermethylation of the MGMT gene occurred exclusively in association with the hypermethylation of the p15 gene. All lymphoma patients with hypermethylation of the p15 and/or MGMT genes had a higher clinical stage of the disease (IV - V). We show the association of anemia and/or thrombocytopenia with the hypermethylation of the p15 gene, ascribing the p15 gene as a potential prognostic marker in B-NHL. Comethylation of MGMT with the p15 gene represents a novel finding and presents both genes as candidates for future studies of the hypermethylation profiles of B-NHL.
The role of FasR/FasL system in pathogenesis of myeloprolyferative neoplasms
Authors: Spasovski Vesna , Tosic Natasa , Kostic Tatjana , Zukic Branka , Stojiljkovic Maja , Colovic Milica , Pavlovic Sonja
Published: July 2010

Myeloproliferative neoplasms (MPN) are hematological malignancies characterized by uncontrolled cell proliferation and impaired apoptosis. The FasR/FasL system is involved in the control of apoptosis in different cell types. Here we have investigated the role of FasR/FasL in the pathogenesis of MPNs. We compared FasR/FasL expression between MPN patients (24) and healthy individuals using the real-time PCR assay. We found an increase of FasR expression in MPN patients. No difference was detected in FasL expression. Mutation V617F in the JAK2 gene, a hallmark of MPN, was detected in 13/24 patients. We found that neither FasR nor FasL expression were related to the presence of JAK2 V617F mutation.
A successful use of a new shuttle cloning vector pA13 for the cloning of the bacteriocins BacSJ and acidocin 8912
Authors: Kojic Milan , Lozo Jelena , Jovcic B. , Strahinic Ivana , Fira D. , Topisirovic L.
Published: July 2010

The aim of this paper was to research the molecular cloning of genes encoding the novel bacteriocin BacSJ from Lactobacillus paracasei subsp. paracasei BGSJ2-8 by using a newly constructed shuttle cloning vector pA13. A new shuttle-cloning vector, pA13, was constructed and successfully introduced into Escherichia coli, Lactobacillus and Lactococcus strains, showing a high segregational and structural stability in all three hosts. The natural plasmid pSJ2-8 from L. paracasei subsp. paracasei BGSJ2-8 was cloned in the pA13 using BamHI, obtaining the construct pB5. Sequencing and in silico analysis of the pB5 revealed 15 open reading frames (ORF). Plasmid pSJ2-8 harbors the genes encoding the production of two bacteriocins, BacSJ and acidocin 8912. The combined N-terminal amino acid sequencing of BacSJ in combination with DNA sequencing of the bacSJ2-8 gene enabled the determination of the primary structure of a bacteriocin BacSJ. The production and functional expression of BacSJ in homologous and heterologous hosts suggest that bacSJ2-8 and bacSJ2-8i together with the genes encoding the ABC transporter and accessory protein are the minimal requirement for the production of BacSJ. Biochemical and genetic analyses showed that BacSJ belongs to the class II bacteriocins. The shuttle cloning vector pA13 could be used as a tool for genetic manipulations in lactobacilli and lactococci.

withdrawn; due to a printing error. Link to the Editorial Decision 10.2298/ABS1004251U
Levels of estrogen receptor B splice variant (ERBΔ5) mRNA correlates with progesterone receptor in breast carcinomas
Authors: Mandusic Vesna , Popov-Celeketic Dusan , Neskovic-Konstantinovic Zora , Kanjer Ksenija , Bozovic Ana , Nikolic-Vukosavljevic Dragica
Published: July 2010

It is well known that breast tumors which are estrogen positive ER(+) are more likely to respond to hormone therapy. However, a certain percentage of ER(+)/PR(+) tumors do not respond to this therapy. Identification of the second estrogen receptor, named estrogen receptor beta (ER?), as well as the existence of numerous isoforms/splice variants of both ER? and ER?, suggests that a complex regulation of estrogen action exists. In this study, we analyzed the expression ratio of ER?1 isoform and ER??5 splice variant mRNAs, and its correlation with ER/PR status by quantitative RT-PCR and clinical and histopathological parameters. We found that the relative proportion of ER??5 in the total ER?1 transcript 'pool' inversely correlates with the PR level (p = -0,359, p< 0,003, Spearman). It may be that the ER??5 variant modulates the ER? activity of downstream targets. In addition, we suggest that the determination of the expression profiles of ER? and ER? isoforms and splice variants in the defined groups of patients are necessary for elucidating their involvement in endocrine resistance.
Activity profile of the CA125 antigen towards human red blood cells
Authors: Mitic N. , Jankovic Miroslava
Published: July 2010

Starting from the mucin nature of the CA125 antigen and conditions associated with high serum concentrations, this study is an attempt to gain insight into its activity profile towards human erythrocytes. Carcinomaassociated and pregnancy-associated CA125 antigens were tested in agglutination/aggregation, adhesion and hemolysis assays. The results obtained indicated that CA125 antigens increased agglutination/aggregation and inhibited erythrocyte adhesion, but differed in their effective concentrations. Galectin-1 slightly modulated the effects observed. CA125 antigens had no effect on hemolysis. The activity profile of the CA125 antigen towards erythrocytes may have biomedical consequences in different microenvironments in relevant physiological and pathophysiological conditions.
Natural and anthropogenic radioactivity of feedstuffs, mosses and soil in the Belgrade environment, Serbia
Authors: Grdovic Svetlana , Vitorovic Gordana , Mitrovic Branislava , Andric V. , Petrujkic B. , Obradovic M.
Published: July 2010

By gamma spectroscopic measurement a content of natural radio-nuclides (40K, 238U, 226Ra, 232Th) and 137Cs was determined in samples of soil, alfalfa, maize and moss on six sites in the surroundings of Belgrade. Natural radionuclides in the soil were at the level characteristic for Serbia, whereas a relatively high level of activity of 137Cs (around 30 Bq kg-1) was determined. On the other hand, in plant samples mostly used as feed (such as alfalfa and maize) the concentration of natural radio-nuclide activity and 137Cs was relatively low, i.e. below the range of detection. The content of natural radio-nuclides in moss was within the standard range of values specific for Serbia. However, the activity level of 137Cs in moss gathered from the wider area around Belgrade, was high, the highest measured level being in the Avala-Zuce area (158-221 Bq kg-1). Our results show that this radio-nuclide is still present in the living environment of Belgrade even 20 years after the Chernobyl disaster, and that moss is a good indicator of living environment 137Cs contamination.
Control of the wax moth Galleria mellonella L. (Lepidoptera: Pyralidae) by the male sterile technique (MST)
Authors: Jafari Reza , Goldasteh Shila , Afrogheh Shahram
Published: July 2010

In this study we examined the control of wax moth using the male sterile technique (MST) with gamma-rays. To determine the safe and effective dosage of gamma-rays capable of sterilizing male pupae of the wax moth, male pupae were exposed to increasing single doses of gamma-rays (250, 300, 350 and 400 Gy). The release ratio of sterile to normal males was also studied in a similar experiment. Treatments included sterile males, normal males and virgin females at the following ratios: 1:1:1, 2:1:1, 3:1:1, 4:1:1 and 5:1:1. Possible parthenogenetic reproduction of this pest was also examined. The results showed that 350 Gy was the most effective dose capable of sterilizing the male pupae of the wax moth. The best release ratio was established at four sterile males, one normal male for each normal female (4:1:1). Also females were incapable of producing offspring without males.
The role of resistance to bile salts and acid tolerance of exopolysaccharides (EPSS) produced by yogurt starter bacteria
Authors: Boke Hatice , Aslim Belma , Alp Gulcin
Published: July 2010

The aim of this study was to investigate a possible relation between EPS production and resistance to bile salts and tolerance to low pH. Eight strains which produced the highest and lowest amount of EPS (16- 211mg/l) were selected among 54 bacteria isolated from yogurt. Additionally, they were tested for resistance to bile salts (0.15, 0.3 %) and tolerance to low pH (2.0-3.0). After treatment with bile salts and acid, viable bacteria (log cfu ml-1) were determined by surface plating. The high EPS producing strains (B3, G12, W22) showed a significant (P<0.05) protective effect against low pH (pH 2.0). All Streptococcus thermophilus strains showed a higher tolerance to bile salts than the Lactobacillus delbrueckii subsp. bulgaricus strains. The high EPS-producing S. thermophilus (W22, T12) and L. bulgaricus (B3, G2) strains showed a significant (P<0.01) protective effect against bile salts (0.3 %).
In vitro shoot regeneration from seedling explants in Brassica vegetables: Red cabbage, broccoli, Savoy cabbage and cauliflower
Authors: Pavlovic Suzana , Vinterhalter Branka , Mitic Nevena , Adzic S. , Pavlovic N. , Zdravkovic M. , Vinterhalter D.
Published: July 2010

Brassica oleracea varieties (red cabbage, broccoli, Savoy cabbage and cauliflower) were tested for their ability to regenerate shoots in vitro. Cotyledon, hypocotyl and root explants of 7 day-old seedlings were incubated on Murashige and Skoog's (MS) medium supplemented with 1 mg l-1 6-benzyladenine (BA) or 6-furfurylaminopurine (KIN) in combination with 0, 0.1, and 0.2 mg l-1 indole-3-butyric acid (IBA). Hypocotyls showed the best explants in almost all varieties tested with a minimum regeneration potential of 75% and producing 3.5-7.4 shoots per explant. The BA-supplemented media were optimal for both shoot regeneration and multiplication. Shoots rooted maximally (100%) on plant growth regulator-free MS medium containing 2% or 4% sucrose. Increased sucrose content improved plant acclimation in the greenhouse.
Radial patterns of 13 elements in the tree rings of beech trees from Mavrovo National park, FYROM
Authors: Hristovski S. , Melovski L.
Published: July 2010

The radial patterns of 13 elements (N, P, K, Ca, Mg, Fe, Na, Mn, Zn, Cu, Pb, Cd and Co) were analyzed in the tree rings of European beech (Fagus sylvatica L.). The study site was located in an 'unpolluted' beech ecosystem in Mavrovo National Park. Thus, the obtained radial patterns in the beech trees were considered to be physiologically driven without significant pollution influence. The influence of the main climatic factors (temperature and rainfall) was tested. The radial patterns of individual trees were compared in order to find individual responses to environmental impacts. For most of the elements, higher concentrations were recorded in the pith and outer-most rings and lower in the middle part of the wood. The concentration of heavy metals was low, and followed the physiological patterns of other biogenic elements.
Phytocenological research into the meadow associations on forest hunting grounds of Serbia
Authors: Tomic Zorica , Bijedic Zorica , Vilotic Dragica , Gacic D.P.
Published: July 2010

The floristic composition of meadow associations within the fenced areas of forest hunting grounds was investigated in the spring of 2008 at three sites: Karakusa (Srem), Miloseva voda (Mt. Sokolovica) and Lomnicka reka (Mt. Veliki Jastrebac), Serbia. At the first location three associations were determined (Agrostio-Juncetum effusi Cinc.1959., Trifolio-Agrostietum stoloniferae L. Mark.1973., and Agrostietum vulgaris. Z. Pavl. 1955 sensu lato.); at the second location Festuco-Agrostietum Horv. (1952) 1982. em Trinajest. 1972., and at the third location Agrostio-Festucetum valesiacae Gajic 1961. Hemicryptophytes were the dominant life form in all the sites (ranging from 61.1 to 72.9%). Also, the presence of 24 floral elements was recorded. The largest number of floral elements was determined at the site of Mt. Sokolovica (17), and the lowest at the third site, Mt. Veliki Jastrebac (9).

 This article has been corrected. Link to the correction 10.2298/ABS1801217E
Antinociceptive and antipyretic activities of Amaranthus viridis Linn. in different experimental models
Authors: Kumar Ashok , Lakshman K. , Jayaveera K.N. , Shekar Sheshadri , Vivek C.
Published: July 2010

The methanolic extract of the whole plant extract of Amaranthus viridis L (MEAV) was screened for antinociceptive activity using the acetic acid writhing test, hot plate test and tail immersion test in mice and for antipyretic activity using the yeast-induced pyrexia method in rats, at doses of 200 and 400 mg/kg body weight. Significant (p<0.01) dose-dependent antinociceptive and antipyretic properties were observed with 200 and 400 mg/kg.

Detected autoplagiarism. Link to the Editorial Decision 10.2298/ABS1004251U
Implementation of Monmonier's algorithm of maximum differences for the regionalization of forest tree populations as a basis for the selection of seed sources
Authors: Ivetic V. , Isajev V. , Stavretovic N. , Mladenovic-Drinic Snezana
Published: July 2010

The regionalization of forest tree populations was researched on an example of beech, as the species with the largest range and the widest ecological amplitude in Serbia. The implementation of Monmonier's algorithm of maximum differences to analyze the spatial distances and the matrix of genetic distances generated by RAPD markers produced different results, depending on the method of addressing the genetic distances, so that data processing should be planned in accordance with the number of samples and their geographic location. The analysis is simple and enables a good visualization of genetic variability barriers which, in combination with the data on the distribution and the geographic barriers, can be utilized for recommending the transfer of forest tree reproductive material.
First record of Calodium hepaticum and Taenia taeniaeformis liver infection in wild Norway rats (Rattus norvegicus) in Serbia
Authors: Kataranovski Milena , Zolotarevski Lidija , Belij Sandra , Mirkov Ivana , Stosic Jelena , Popov Aleksandra , Kataranovski D.
Published: July 2010

The nematode Calodium hepaticum and the cestode Taenia taeniaeformis are zoonotic helminths primarly found in the liver of common wild rats. Most reports on these helminth species with cosmopolitan distribution are from Asia, and there is paucity of data for Europe. Wild Norway rats (Rattus norvegicus) from urban and suburban habitats of the Belgrade area were examined for the presence of Calodium hepaticum and Taenia taeniaeformis larvae liver infections. The presence of visible cysts and a histomorphology of parasite-related inflammatory liver responses were sought as signs of infection. The total prevalence of infection was 10.9% (C. hepaticum) and 29.9% (T. taeniaeformis), with no differences between the sexes. No difference in the annual prevalence of both helminth species was noted. Data obtained in this study provide new information relevant to wild Norway rats as sources of C. hepaticum and T. taeniaeformis liver infection in this geographic area, and, in a wider context, in Europe. .
A new species and two new records of the genus Zelotes gistel, 1848 (Araneae: Gnaphosidae) from Turkey
Authors: Seyyar Osman , Demir Hakan , Aktaş Metin
Published: July 2010

Zelotes turcicus sp. n. is described and illustrated from Turkey. Differences between the new species and related species are discussed. Z. harmeron Levy, 2009 and Z. segrex (Simon, 1878) are recorded for the first time from Turkey. A description of Z. harmeron Levy, 2009 is presented based on collected materials. Photographs of its palpal organ are also given.
Fundamental simplices with outer vertices for hyperbolic groups and their group extensions for truncations
Authors: Stojanovic Milica
Published: July 2010

There are investigated supergroups of some hyperbolic space groups with simplicial fundamental domain. If the vertices of these simplices are out of the absolute, we can truncate them by polar planes of the vertices and the new polyhedra are fundamental ones of the richer groups. In papers of E. Molnar, I. Prok and J. Szirmai the simplices, investigated here, are collected in families F3, F4 and F6. We have constructed at least one new hyperbolic space group for each truncated simplex in these families. 2010 Mathematics Subject Classifications. 51M20, 52C22, 20H15, 20F55. .
GA2 index of some graph operations
Authors: Fath-Tabar G.H. , Hamzeh A. , Hossein-Zadeh S.
Published: July 2010

Let G = (V, E) be a graph. For e = uv ? E(G), nu (e) is the number of vertices of G lying closer to u than to v and nv (e) is the number of vertices of G lying closer to v than u. The GA2 index of G is defined as ?uv?E(G) 2? nu(e)nv(e) / nu(e) + nv(e). We explore here some mathematical properties and present explicit formulas for this new index under several graph operations. 2010 Mathematics Subject Classifications. 05C12, 05A15, 05A20, 05C05. .
Global approximation properties of modified SMK operators
Authors: Özarslan Ali , Duman Oktay
Published: July 2010

In this paper, introducing a general modification of the classical Sz?sz-Mirakjan-Kantorovich (SMK) operators, we study their global approximation behavior. Some special cases are also presented. 2010 Mathematics Subject Classifications. 41A25, 41A36. .
Common fixed point theorem for four mappings satisfying generalized weak contractive condition
Authors: Abbas Mujahid , Djoric Dragan
Published: July 2010

Contractive conditions introduced in (Q. Zhang and Y. Song, Fixed point theory for generalized ?-weak contraction, Appl. Math. Lett. 22(2009), 75-78) and (D. Djoric, Common fixed point for generalized (?, ?)-weak contractions, Applied Mathematics Letters, 22(2009), 1896-1900) are employed to obtain a new common fixed point theorem for four maps. Our result substantially generalizes comparable results in the literature. 2010 Mathematics Subject Classifications. 47H10. .
A method of constructing braided Hopf algebras
Authors: Ma Tianshui , Wang Shuanhong , Xu Shaoxian
Published: July 2010

Let A and B be two Hopf algebras and R ( Hom(B ( A, A ( B), the twisted tensor product Hopf algebra A#RB was introduced by S. Caenepeel et al in [3] and further studied in our recent work [6]. In this paper we give the necessary and sufficient conditions for A#RB to be a Hopf algebra with a projection. Furthermore, a braided Hopf algebra A is constructed by twisting the multiplication of A through a (?, R)-pair (A, B). Finally we give a method to construct Radford's biproduct directly by defining the module action and comodule action from the twisted tensor biproduct. 2010 Mathematics Subject Classifications. 16W30. .
Browder and Weyl spectra of upper triangular operator matrices
Authors: Duggal B.P.
Published: July 2010

Let MC = (A/0 C/B) ( B(X ( X ) be an upper triangulat Banach space operator. The relationship between the spectra of MC and M0, and their various distinguished parts, has been studied by a large number of authors in the recent past. This paper brings forth the important role played by SVEP, the single-valued extension property, in the study of some of these relations. Operators MC and M0 satisfying Browder's, or a-Browder's, theorem are characterized, and we prove necessary and sufficient conditions for implications of the type 'M0 satisfies a-Browder's (or a-Weyl's) theorem ( MC satisfies a-Browder's (resp., a-Weyl's) theorem' to hold. 2010 Mathematics Subject Classifications. Primary 47B47, 47A10, 47A11. .
Classification of the crossed product C(m) × θZp for certain pairs (M, θ)
Authors: Xue Yifeng
Published: July 2010

Let M be a separable compact Hausdorff space with dim M ? 2 and ? : M ? M be a homeomorphism with prime period p (p ? 2). Set M? = {x ( M|?(x) = x} = ( and M0 = M\M? . Suppose that M0 is dense in M and H2(M0/?, Z) ( 0, H2(?(M0/?), Z) ( 0. Let M' be another separable compact Hausdorff space with dim M' ? 2 and ?' be the self-homeomorphism of M' with prime period p. Suppose that M'0 = M'\M'?' is dense in M'. Then C(M) ? ?Zp ( C(M') ? ?'Zp if there is a homeomorphism F from M/? onto M'/?' such that F(M?) = M'?'. Thus, if (M, ?) and (M', ?') are orbit equivalent, then C(M) ? ?Zp ( C(M') ? ?'Zp. 2010 Mathematics Subject Classifications. 46L05. .
A study on the influence of curing on the strength of a standard grade concrete mix
Authors: Krishna Rao , Kumar Rathish , Khan Azhar
Published: July 2010

Curing is essential if concrete is to perform the intended function over the design life of the structure while excessive curing time may lead to the escalation of the construction cost of the project and unnecessary delays. Where there is a scarcity of water and on sloping surfaces where curing with water is difficult and in cases where large areas like pavements have to be cured, the use of curing compound may be resorted to. The parameters of the study include the curing period [1, 3, 7, 14 and 28 day], curing method [conventional wet curing, membrane forming compound curing and accelerated curing] and the type of cement [Ordinary Portland Cement(OPC) 43 grade, Portland Pozzolana Cement(PPC) 43 grade and Ordinary Portland Cement(OPC) 43 grade +10% Silica Fume(SF) replacement for cement]. In all a total of 99 cube specimens were cast and cured under different conditions before testing. Test results indicate a drop in strength at all ages for concretes with PPC and the one in which 10% OPC is replaced by silica Fume(SF) in comparison with the concrete with OPC. Curing by membrane forming curing compound yielded nearly the same results as that of conventional wet curing for concrete with OPC and there was a marginal decrement in concrete with PPC. Predicted 28-day strength of concrete from the accelerated curing test was found to be on a conservative side compared to control concrete.
Active control of smart structures - an overall approach
Authors: Nestorovic Tamara , Trajkov Miroslav
Published: July 2010

The paper presents active control of smart structures within a focused frame of piezoelectric applications in active vibration and noise attenuation with potentials for the use in mechanical and civil engineering. An overall approach to active control of piezoelectric structures involves subsequent steps of modeling, control, simulation, experimental verification and implementation. Each of these steps is regarded in details. Different application examples showing the feasibility of the active structural control will be presented.
Influence of principal stress direction on the stress-strain-strength behaviour of completely decomposed granite
Authors: Kumruzzaman Md. , Yin Jian-Hua
Published: July 2010

The measurement and study of the stress-strain-strength behavior of soils in general stress states involving principal stress rotation are necessary and valuable. To investigate the strength behavior under principal stress rotation, a series of undrained tests on compacted hollow cylinder specimens of completely decomposed granite (CDG) was carried in hollow cylinder apparatus. Tests were conducted using constant inside and outside pressures and maintained a fixed angle of rotation of principal stress with the vertical (?). Seven different angles of major principal stress orientations were used to cover the entire range of major principal stress directions from vertical to the horizontal. Two different confining stresses were used to find out the variations of the experimental results. It is observed that the deviator stresses as well as excess pore pressures decrease with the angle ?. It is also observed that specimens were getting softer with the increase of ?. The results also show a significant influence of principal stress direction angle on the strength parameters. It is found that the angle ? is related to the occurrence of cross-anisotropy and the localization which resulted in a pronounced influence on the strength parameters of the CDG specimens.
Modeling of soil parameters spatial uncertainty by geostatistics
Authors: Davidovic Nebojsa , Prolovic Verka , Stojic Dragoslav
Published: July 2010

Geotechnical performance of 'soil-structure' systems is strongly dependent on the properties of the soil and prediction of the performance of these systems in real conditions requires accurate modeling of soil parameters. With the help of high-speed computers, now it is possible to create advanced constitutive models, but large uncertainties and variations in soil properties could reduce the advantages gained by using such models. In this paper sources and types of uncertainty in geotechnical engineering practice are first presented, followed by a review of the basic concepts and terminology of geostatistics. Finally, procedures for quantification of uncertainty and for geostatistical estimation and simulation of spatially variable soil properties are presented.
A bearing structure and finished construction behavior analysis based on the full-scale experimental research
Authors: Zdravkovic Slavko , Zlatkov Dragan , Mladenovic Biljana , Igic Tomislav , Stojic Nikola
Published: July 2010

The paper deals with a brief presentation of a part of the performed experimental tests of the prefabricated reinforced concrete structural system 'AMONT' for construction of various types of modern industrial halls. The test results are analyzed for two industrial halls both constructed according to this structural system but in the different phases of construction, tested in the full scale by application of AMBIENT vibration method. From the obtained Fourier spectra for measured ambient vibrations in two orthogonal direction for the structure without walls and the other with fa?ade and filling walls, a significant discrepancy in their natural frequencies has been observed, and some conclusions about the influence of panel walls on dynamic characteristic the frame structure have been drawn out. The paper used some data of the research after the earthquake in Montenegro which took place on 15th of April 1979.
High performance superplasticized silica fume mortars for ferrocement works
Authors: Rathish Kumar
Published: July 2010

Ferrocement works demand cement mortars of good workability and high strength. Reduction in water-cement ratio combined with a refined pore structure increases the compressive strength in addition to the enhancement of durability characteristics, but the workability decreases. Workability becomes important, as the mortar has to easily penetrate between the layers of the mesh wires. A reasonably workable high strength cement mortar can be obtained by using a high cement content coupled with the use of superplasticizers. These were also found to retain the cohesiveness and check undesirable bleeding and segregation. An experimental program was conducted to study the functional efficacy of an SNF condensate used as a water reducing superplasticizer. The compressive strength and flow characteristics of the mortars were determined to decide their suitability for ferrocement works. The parameters included the mix proportions, the grade of cement, age of curing and the dosage of superplasticizer. It was concluded from the study that the addition of an optimum dosage of superplasticizer improved the workability and strength characteristics of silica fume mortars. There was a late gain in the compressive strength of silica fume mortars.
Railway noise and vibration: Current European legislation and research and measurements on Serbian railway
Authors: Tomicic-Torlakovic Mirjana , Stefanovic Svetislav
Published: July 2010

In this paper certain current European noise legislation, standards and research including the Physical Agents Directive, the Environmental Noise Directive 2002/49/EC and the Technical Specifications for Interoperability are summarized and their implications in terms of maintaining the track are discussed. In the Environmental Noise Directive a number of research projects investigated noise mapping. From this Directive the action plans for control of noise on the environment follow. Measurements of noise and vibrations on Serbian Railway, before and after track reconstruction, are presented at the end.
Effects of RC beams reinforcement using near surface mounted reinforced FRP composites
Authors: Rankovic Slobodan , Folic Radomir , Mijalkovic Marina
Published: July 2010

This paper analyzes application of modern reinforcement methods for reinforced concrete (RC) beams using fiber-reinforced polymer (FRP) materials. Basic characteristics of FRP materials and the method of mounting the FRP bars within concrete, that is, near the surface of the beams (NSM method) are presented. The properties of this method and its advantages in comparison to externally bonded reinforcement laminate method (EBR) have been analyzed. The results of measured deflections and width of the cracks of the beams reinforced by FRP bars, depending on the load are presented and discussed, in comparison to the results obtained from the non-reinforced beams. The experimental research was published at the Faculty of Civil Engineering and Architecture of Nis in 2009.
Water quality modeling role in implementation of the Water Framework Directive
Authors: Milicevic Dragan , Milenkovic Slobodan , Potic Olivera
Published: July 2010

Regarding the complexity of the issue, the mathematical models become increasingly important for implementation of Water Framework Directive, particularly in terms of pollution control and management of water resources quality in river basin areas. The models can be used in all the phases of WFD implementation, especially in evaluation of effects of pressure on water status, analysis of future actions effects on improvement of the aquatic ecosystems status and defining of cost-effective monitoring programs. The paper stresses the importance and role of application of mathematical water quality models in implementation of the WFD and a number of models and a software system being developed at the Faculty of Civil Engineering and Architecture of Nis is presented, as well as the fundamental s and principles on whose basis the model and the program system have been developed.
Tradition and modernization: European perspectives of culture in the Balkans
Authors: Bozilovic Nikola
Published: July 2010

Layers of historic heritage and modern tendencies interlace in the culture of the present-day Balkans. Eurointegration of the Balkans faces numerous challenges. On one side, the so-called Eurooptimism is awakening, while on the other, fears of losing cultural and national identities are growing ever stronger amongst Balkan peoples. Is it possible to integrate the societies of the Balkans into the European Union, and retain the particularities of the cultural tradition of the peoples of this region? The answer to this question demands a complex and multidisciplinary analysis, especially when the contemporary Serbian society is concerned. Organized conservative forces are standing in the way of modernization, resisting any modern invention and creative initiative coming from the so-called Other Serbia. The issue is subjected to cultural-sociological analysis in this paper, supported, particularly regarding the situation in Serbia, by the findings of a several-years empirical study conducted within a research project organized by the Center for Sociological Research of the Faculty of Philosophy in Nis.
Media and postmodern reality
Authors: Masirevic Ljubomir
Published: July 2010

The paper tackles the ideas of key postmodern theoreticians on the role of the media in contemporary societies. The aim is to show that according to postmodern theory the media have become the leading factor in contemporary social processes marked by the loss of sense of historical continuity in everyday human experience. Postmodern theoreticians claim that, since the media system, which has come to wholly encompass reality at the turn of this century, is unable to reclaim the past, human existence has found itself in the ceaseless schizophrenic present. Simulations of events that once were and come back to us today like a string of anachronistic media notions about the past, bring us into the state of historical amnesia. The media, and cinema above all, are the main catalyst of this process, as well as of what postmodernists call the new superficiality and shallowness of social life. Postmodern reality is characterized by a simulation of history which didn't happen; today people are exposed to pseudo-experience emerging from constant exposure to the simulacrum of historical events. In place of conclusion, Baudrillard's interpretation of the Gulf War as a virtual media event is offered.
G Protein–Coupled Receptor Kinase 2 Plays a Relevant Role in Insulin Resistance and Obesity
Authors: Garcia-Guerra Lucia , Nieto-Vazquez Iria , Vila-Bedmar Rocio , Jurado-Pueyo María , Zalba Guillermo , Díez Javier , Murga Cristina , Fernández-Veledo Sonia , Mayor Federico , Lorenzo Margarita
Published: July 2010

OBJECTIVE

Insulin resistance is associated with the pathogenesis of metabolic disorders as type 2 diabetes and obesity. Given the emerging role of signal transduction in these syndromes, we set out to explore the possible role that G protein–coupled receptor kinase 2 (GRK2), first identified as a G protein–coupled receptor regulator, could have as a modulator of insulin responses.

RESEARCH DESIGN AND METHODS

We analyzed the influence of GRK2 levels in insulin signaling in myoblasts and adipocytes with experimentally increased or silenced levels of GRK2, as well as in GRK2 hemizygous animals expressing 50% lower levels of this kinase in three different models of insulin resistance: tumor necrosis factor-α (TNF-α) infusion, aging, and high-fat diet (HFD). Glucose transport, whole-body glucose and insulin tolerance, the activation status of insulin pathway components, and the circulating levels of important mediators were measured. The development of obesity and adipocyte size with age and HFD was analyzed.

RESULTS

Altering GRK2 levels markedly modifies insulin-mediated signaling in cultured adipocytes and myocytes. GRK2 levels are increased by ∼2-fold in muscle and adipose tissue in the animal models tested, as well as in lymphocytes from metabolic syndrome patients. In contrast, hemizygous GRK2 mice show enhanced insulin sensitivity and do not develop insulin resistance by TNF-α, aging, or HFD. Furthermore, reduced GRK2 levels induce a lean phenotype and decrease age-related adiposity.

CONCLUSIONS

Overall, our data identify GRK2 as an important negative regulator of insulin effects, key to the etiopathogenesis of insulin resistance and obesity, which uncovers this protein as a potential therapeutic target in the treatment of these disorders.
Diabetes Risk Assessment in Mexicans and Mexican Americans
Authors: Velasco Mondragon Hector E. , Charlton R. William , Peart Tasha , Burguete-Garcia Ana I. , Hernandez-Avila Mauricio , Hsueh Wen-Chi
Published: July 2010

OBJECTIVE

Parental diabetes history is a well-known risk factor for type 2 diabetes and considered strong evidence for a genetic basis of type 2 diabetes. Whether this relationship is affected by other known risk factors, specifically obesity, remains unclear, possibly due to a relative paucity of lean diabetic patients.

RESEARCH DESIGN AND METHODS

This issue was investigated using data from a high-risk population from Mexico (National Health Survey 2000, n = 27,349), with observations replicated using U.S. citizens of Mexican descent from the National Health and Nutrition Examination Survey 2001–2002 and 2003–2004 (n = 1,568).

RESULTS

As expected, positive parental diabetes was a significant risk factor for type 2 diabetes, regardless of age, sex, or adiposity level. However, positive parental diabetes conferred greater risk in leaner individuals than in their overweight peers (P = 0.001). In other words, the effect of BMI on type 2 diabetes risk was smaller in the presence of parental diabetes history.

CONCLUSIONS

These findings suggest that parental diabetes is a stronger risk factor for type 2 diabetes in the absence of obesity. Thus, studies in lean diabetic patients could help identify type 2 diabetes susceptibility genes. This study reinforces the concept that parental diabetes and BMI are independent type 2 diabetes risk factors and suggests that glycemic screening may be helpful in assessing type 2 diabetes risk in individuals with parental diabetes history, regardless of their overweight status.
Maternally Transmitted and Food-Derived Glycotoxins
Authors: Mericq Veronica , Piccardo Cecilia , Cai Weijing , Chen Xue , Zhu Li , Striker Gary E. , Vlassara Helen , Uribarri Jaime
Published: July 2010

OBJECTIVE

Proinflammatory advanced glycation end products (AGEs) found in thermally processed foods correlate with serum AGEs (sAGEs) and promote type 1 and type 2 diabetes in mice. Herein we assess the relationship of maternal blood and food AGEs to circulating glycoxidants, inflammatory markers, and insulin levels in infants up to age 1 year.

RESEARCH DESIGN AND METHODS

AGEs (Nε-carboxymethyllysine [CML] and methylglyoxal derivatives) were tested in sera of healthy mothers in labor (n = 60), their infants, and infant foods. Plasma 8-isoprostane, fasting glucose, insulin, leptin, and adiponectin levels were assessed in 12-month-old infants.

RESULTS

Significant correlations were found between newborn and maternal serum CML (sCML) (r = 0.734, P = 0.001) serum methylglyoxal derivatives (sMGs) (r = 0.593, P = 0.001), and 8-isoprostanes (r = 0.644, P = 0.001). Infant adiponectin at 12 months negatively correlated with maternal sCML (r = −0.467, P = 0.011), whereas high maternal sMGs predicted higher infant insulin or homeostasis model assessment (P = 0.027). Infant sAGEs significantly increased with the initiation of processed infant food intake, raising daily AGE consumption by ∼7.5-fold in year 1.

CONCLUSIONS

Maternal blood and food-derived AGEs prematurely raise AGEs in children to adult norms, preconditioning them to abnormally high oxidant stress and inflammation and thus possibly to early onset of disease, such as diabetes.
Sediment transport and water quality in Máchovo Lake (Czech Republic)
Authors: Dostal Tomas , Krasa Josef , Vrana Karel , Dockal Martin , Koudelka Petr , David Vaclav , Vokurka Adam
Published: July 2010

Sediment transport and water quality in Máchovo Lake (Czech Republic)

Máchovo Lake is a historical reservoir founded by Czech King Charles IV. in 14th century. Located in northern part of central Bohemia it has been widely used for recreation purposes for many decades (or even centuries). Its catchments (ca 100 sq km) consist of intensively used agricultural land (ca 25% of area) and of large forested area under nature protection. Several other lakes (ponds) are chained on the two reservoir's inlets. Irrespective of its great recreation potential Máchovo Lake is one of the Bohemian lakes known for its problems with eutrophication and water quality. The project was set up to point out sources of nutrients and to search for proper solutions. Sediment loads in every lake within the catchments were measured and sampled in order to quantify the nutrients and other pollution. Point and non point sources of phosphorus and other nutrients were searched. Sediment transport within catchments was modelled using WaTEM/SEDEM model. Interestingly, the water quality in the particular ponds varies significantly even though each one of several hundred years old ponds is heavily silted. Soil erosion protection measures within catchments were proposed altogether with flood protection measures in the stream valleys and waste water treatment facilities in surrounding villages. Setting up water quality sampling devices in selected stream profiles was tested and designed. The continual proper management should lead to water quality improvement.