bluuebunny/crossref_metadata_2025_split huggingface dataset:
Weight structures vs.t-structures; weight filtrations, spectral sequences, and complexes (for motives and in general)
Authors: Bondarko M.V. 
Published: January 2011

AbstractIn this paper we introduce a new notion ofweight structure (w)for a triangulated categoryC; this notion is an important natural counterpart of the notion oft-structure. It allows extending several results of the preceding paper [Bon09] to a large class of triangulated categories and functors.Theheartofwis an additive categoryHw⊂C. We prove that a weight structure yields Postnikov towers for anyX∈ObjC(whose 'factors'Xi∈ObjHw). For any (co)homological functorH:C→A(Ais abelian) such a tower yields aweight spectral sequenceT : H(Xi[j]) ⇒H(X[i + j]); Tis canonical and functorial inXstarting fromE2.Tspecializes to the usual (Deligne) weight spectral sequences for 'classical' realizations of Voevodsky's motivesDMeffgm(if we considerw = wChowwithHw=Choweff) and to Atiyah-Hirzebruch spectral sequences in topology.We prove that there often exists an exact conservative weight complex functorC→K(Hw). This is a generalization of the functort:DMeffgm→Kb(Choweff) constructed in [Bon09] (which is an extension of the weight complex of Gillet and Soulé). We prove thatK0(C) ≅K0(Hw) under certain restrictions.We also introduce the concept of adjacent structures: at-structure isadjacenttowif their negative parts coincide. This is the case for the Postnikovt-structure for the stable homotopy categorySH(of topological spectra) and a certain weight structure for it that corresponds to the cellular filtration. We also define a new (Chow)t-structuretChowforDMeff_⊃DMeffgmwhich is adjacent to the Chow weight structure. We haveHtChow≅ AddFun(Choweffop,Ab);tChowis related to unramified cohomology. Functors left adjoint to those that aret-exact with respect to somet-structures are weight-exact with respect to the corresponding adjacent weight structures, and vice versa. Adjacent structures identify two spectral sequences converging toC(X,Y): the one that comes from weight truncations ofXwith the one coming fromt-truncations ofY(forX,Y∈ObjC). Moreover, the philosophy of adjacent structures allows expressing torsion motivic cohomology of certain motives in terms of the étale cohomology of their 'submotives'. This is an extension of the calculation of E2of coniveau spectral sequences (by Bloch and Ogus).
ASSESSMENT OF THE LIVESTOCK-FEED AND WATER NEXUS ACROSS A MIXED CROP-LIVESTOCK SYSTEM'S INTENSIFICATION GRADIENT: AN EXAMPLE FROM THE INDO-GANGA BASIN
Authors: HAILESLASSIE AMARE , BLÜMMEL MICHAEL , CLEMENT FLORIANE , DESCHEEMAEKER KATRIEN , AMEDE TILAHUN , SAMIREDDYPALLE ANANDAN , ACHARYA N. SREEDHAR , RADHA A. VENKATA , ISHAQ SABA , SAMAD MADAR , MURTY M. V. R. , KHAN M. A. 
Published: January 2011

SUMMARYProjections suggest that annual per capita water availability in the Indo-Ganga Basin (IGB) will reduce to a level typical for water-stressed areas. Producing more crop and livestock products, per unit of agricultural water invested, is advocated as a key strategy for future food production and environmental security in the basin. The objective of this study was to understand the spatio-temporal dynamics of water requirements for livestock feed production, attendant livestock water productivity (LWP) and implications for the future sustainable use of water resources. We focused on three districts in the IGB representing intensive (higher external inputs, e.g. fertilizer, water) and semi-intensive (limited external input) crop-livestock systems. LWP is estimated based on principles of water accounting and is defined as the ratio of livestock beneficial outputs and services to the water depleted and degraded in producing these. In calculating LWP and crop water productivity (CWP), livestock, land use, land productivity and climatic data were required. We used secondary data sources from the study districts, field observations and discussions with key informants to generate those data sets. Our result showed that the volume of water depleted for livestock feed production varied among the study systems and was highly affected by the type of feed and the attendant agronomic factors (e.g. cropping pattern, yield). LWP value was higher for intensive systems and affected by agricultural water partitioning approaches (harvest index, metaolizable energy). LWP tended to decrease between 1992 and 2003. This can be accounted for by the shift to a feeding regime that depletes more water despite its positive impacts on animal productivity. This is a challenging trend with the advent of and advocacy for producing more agricultural products using the same or lower volume of water input and evokes a need for balanced feeding, by considering the nutritive value, costs and water productivity of feed, and better livestock management to improve LWP.
UNDERSTANDING COMMUNITY PERCEPTIONS OF LAND USE CHANGES IN THE RANGELANDS, ZIMBABWE
Authors: SIBANDA ANDREW , TUI SABINE HOMANN-KEE , VAN ROOYEN ANDRÉ , DIMES JOHN , NKOMBONI DANIEL , SISITO GIVIOUS 
Published: January 2011

SUMMARYThe objective of this study was to investigate the user communities' understanding and interpretation of changes in rangeland use and productivity in the communal lands of Zimbabwe. While external knowledge has been instrumental in defining the drivers and effects of ecological changes hitherto, the role of local knowledge is becoming increasingly important in explaining factors that inform user community perceptions and guide their decisions on the use of rangeland resources. Data on community perceptions were collected in four villages, using Participatory Rural Appraisals in each village and household surveys with a total of 104 households. This study showed that user communities in Nkayi district differentiate rangelands among seven categories of livestock feed resources and how these have changed over time. Communities viewed rangelands not as one continuous, designated and specialized land parcel, but differentiated the land by location, productivity, management and uses in different times of the year. Although land use changes affecting these livestock feed resources were considered to be widespread and multi-directional (both negative and positive) they did not cause widespread degradation. Rangelands converted to croplands were not completely lost, but became important dual purpose land parcels fulfilling both household food security needs and dry season livestock feed requirements. The importance of croplands as a feed resource is reflected in the emergence of new institutions governing their use for livestock grazing and to guarantee security of tenure. On the other hand institutions governing the use of common property rangelands decreased or weakened in their application. The study concludes that while this situation presents ecological challenges for the rangelands, it offers opportunities to find innovative ways of utilizing croplands as the new frontier in the provision of dry season feed resources to smallholder farmers in highly variable environments. Implications for livestock water productivity need to be investigated and water saving technologies should be promoted in the land use intensification processes.
GENDERED LIVELIHOOD IMPLICATIONS FOR IMPROVEMENTS OF LIVESTOCK WATER PRODUCTIVITY IN ZIMBABWE
Authors: SENDA TRINITY S. , PEDEN DON , TUI SABINE HOMANN-KEE , SISITO GIVIOUS , VAN ROOYEN ANDRÉ F. , SIKOSANA JOSEPH L. N. 
Published: January 2011

SUMMARYScarcity, lack of access, and ineffective and inefficient use of water in Nkayi District, Zimbabwe, threaten agricultural production. The purpose of this study is to augment understanding of opportunities to increase livestock water productivity (LWP) in Nkayi District by taking into account key differences in the capacities, opportunities, and needs of women and men. There are two important types of female-headed households, de facto and de jure. The results from this study showed that male-headed and de facto and de jure female-headed households share much in common. They all had similar areas of cropland and access to education, finances, veterinary and extension services, and transportation and markets. Households of all types had similar herd sizes. All were desperately poor with incomes much less than a dollar a day. To rise out of poverty, the knowledge, skills and effort of all household heads will be needed. In spite of severe poverty, household heads of all types are literate and have sufficient education that can help enable adoption of intervention options that can lead to increased agricultural production and improved livelihoods. The results also showed that major differences exist in terms of the roles of men and women in ownership, management and decision making related to livestock keeping and animal production. Men clearly dominate in both ownership and decision making even though women play a major role in animal management. Only in de jure female-headed households were women more likely than men to own cattle and goats. They were also more likely to be involved in farming as a primary livelihood activity. Surprisingly, men were more likely to be involved in animal management in these de jure female-headed households. Women were also excluded from water users' and livestock producers' associations although a minority of men was members. By not involving the already-developed capacity of women, the community loses out on a significant opportunity to increase LWP and animal production more widely. Greater inclusion of women in decision making will be an important part of future efforts to improve livelihoods through livestock development.
The effect of rumen-protected methionine and choline on plasma metabolites of Holstein dairy cows
Authors: ARDALAN M. , DEHGHAN-BANADAKY M. , REZAYAZDI K. , GHAVI HOSSEIN-ZADEH N. 
Published: January 2011

SUMMARYForty Holstein dairy cows in their first and second lactations were used from 4 weeksprepartumto 10 weekspostpartumto investigate the effects of feeding ruminally protected methionine and choline on plasma metabolites. Cows were randomly assigned to one of the following treatments in a 2×2 factorial design 4 weeks before their expected calving dates, using randomized blocks based on parity: no supplement (control), 18 g/d of rumen-protected methionine (RPM) product, 60 g/d of rumen-protected choline (RPC) product, or 18 g/d of RPM+60 g/d of RPC. Treatments did not affect plasma triglycerides, glucose, total protein, nonesterified fatty acids (NEFA),β-hydroxybutyrate (BHBA), plasma urea nitrogen (PUN) or aspartate aminotransferase (AST) during theprepartumperiod. Forpostpartumplasma NEFA concentrations, there were interactions between RPC or RPM and weekpostpartum. Feeding RPM increased plasma AST concentrations (P<0·05) and decreased plasma protein concentrations (P<0·05) inpostpartumcows. After calving, feeding RPC increased (P<0·05) dry matter intake (DMI), milk yield, 40 g/kg fat-corrected milk (FCM) yield and energy-corrected milk (ECM) yield. This suggests that supplemental RPC can improve lactation performance of dairy cows.
Leaving home and entering service: the age of apprenticeship in early modern London
Authors: WALLIS PATRICK , WEBB CLIFF , MINNS CHRIS 
Published: January 2011

ABSTRACTLeaving home and entering service was a key transition in early modern England. This article presents evidence on the age of apprenticeship in London. Using a new sample of 22,156 apprentices bound between 1575 and 1810, we find that apprentices became younger (from 17.4 to 14.7 years) and more homogeneous in age, irrespective of background. We examine the effect of region of origin, parental occupation, Company entered and paternal mortality on age of entry. The fall in apprentices' ages has significant implications for our understanding of the labour supply, training structures, experiences of apprenticeship and family economy in this period.
Service and Gender Inequity among Faculty
Authors: Pyke Karen 
Published: January 2011

AbstractThis article describes social structural inequities in the academy that contribute to gender imbalances in faculty service demands, which can slow women's career advancement. The author criticizes as ill-considered and ineffective the popular notion that the solution rests with individual female faculty, who should “just say no” to service. Instead, she proposes structural and cultural solutions to this systemic problem, including a revaluation of faculty labor required to maintain the day-to-day operation of institutions of higher learning and research.
Distinguishing Sex and Gender
Authors: McDermott Rose , Hatemi Peter K. 
Published: January 2011

AbstractWe argue for the importance of adequately distinguishing between the concepts of sex, gender, and sexual orientation. We review the literature across disciplines to suggest ways that political scientists might benefit by taking into account important biological distinctions in addition to cultural factors regarding sex, gender, and sexuality in their research. We clarify the distinction between these concepts in an effort to help reduce discrimination and defuse misconceptions, stereotypes, and imposed social roles. We believe that it would be fruitful for us as a discipline to better communicate this research to the wider public in the hope that public opinion and elite discourse will shift in a more tolerant and positive direction as a result.
Investigation of minute strain in silicon on insulator and strained-silicon/silicon–germanium/silicon-substrate semiconductor materials using a synchrotron radiation X-ray microbeam
Authors: Matsui J. , Tsusaka Y. , Takano H. , Kagoshima Y. , Senda T. , Izunome K. , Horikawa T. , Urushihara Y. , Yokoyama K. 
Published: January 2011

Strain in silicon on insulator (SOI) and strained-silicon(s-Si)/silicon–germanium (SiGe)/Si-substrate crystals is analysed by means of synchrotron X-ray microbeam diffraction. It is found that strain features of the s-Si/SiGe/Si crystals are much different from those of SOI crystals from the lattice tilt and lattice parameter distribution points of view. The two-dimensional lattice tilt maps obtained by scanning the synchrotron X-ray microbeam of about 1 μm in size on the sample surface are useful to study local strain distribution in those materials.
Non-destructive measurement of the depth profile of the constituent in iron oxide scale by X-ray diffraction at SPring-8
Authors: Sato M. , Doi T. , Hidaka Y. , Higashida Y. , Masaki Y. , Otsuka N. 
Published: January 2011

The depth profiles of the constituent in iron oxide scales were investigated by X-ray diffraction measurement with controlling X-ray penetration depth at SPring-8. We successfully observed the interface region of scales non-destructively using X-ray with energy of 28 keV. The results indicated that the volume fraction ratio of Fe3O4 to FeO around the surface of samples increased by isothermal heat treatment. This suggested that the transformation of FeO to Fe3O4 due to isothermal heat treatment proceeds from surface into the inside of scale.
Multivariate statistical methods in the forensic investigation of the post-blast residues measured by Fourier transform infrared spectroscopy
Authors: Banas K. , Banas A. , Moser H. O. , Bahou M. , Cholewa M. , Yang P. , Lim S. K. 
Published: January 2011

Fourier transform infrared (FTIR) spectroscopy has gained significant attention among the forensic scientists because it shows high sensitivity and selectivity, and offers near-real-time detection. Application of the multivariate statistical techniques for the analysis of the spectra is necessary in order to enable feature extraction, proper evaluation and identification of obtained spectra. In this paper we show the development of a feasible procedure for the characterization of spectroscopic signatures of the explosive materials in the remnants after explosion. In our research especially designed and prepared sample catchers were used during the blasts of three various high explosives: C-4, TNT and PETN. Principal component analysis (PCA) was performed using broad spectral data range (600–4000 cm−1) for sample classification into separate classes. Most of the information contained in spectral data was compressed by PCA in few relevant principal components that explain most of the variance of spectral data. The results show that FTIR spectroscopy in combination with multivariate methods are well suited for identification and differentiation purposes even in very large data sets and could be employed by forensic laboratories for rapid screening analysis.
Expression, Splicing, and Evolution of the Myosin Gene Family in Plants
Authors: Peremyslov Valera V. , Mockler Todd C. , Filichkin Sergei A. , Fox Samuel E. , Jaiswal Pankaj , Makarova Kira S. , Koonin Eugene V. , Dolja Valerian V. 
Published: January 2011

Abstract
Plants possess two myosin classes, VIII and XI. The myosins XI are implicated in organelle transport, filamentous actin organization, and cell and plant growth. Due to the large size of myosin gene families, knowledge of these molecular motors remains patchy. Using deep transcriptome sequencing and bioinformatics, we systematically investigated myosin genes in two model plants, Arabidopsis (Arabidopsis thaliana) and Brachypodium (Brachypodium distachyon). We improved myosin gene models and found that myosin genes undergo alternative splicing. We experimentally validated the gene models for Arabidopsis myosin XI-K, which plays the principal role in cell interior dynamics, as well as for its Brachypodium ortholog. We showed that the Arabidopsis gene dubbed HDK (for headless derivative of myosin XI-K), which emerged through a partial duplication of the XI-K gene, is developmentally regulated. A gene with similar architecture was also found in Brachypodium. Our analyses revealed two predominant patterns of myosin gene expression, namely pollen/stamen-specific and ubiquitous expression throughout the plant. We also found that several myosins XI can be rhythmically expressed. Phylogenetic reconstructions indicate that the last common ancestor of the angiosperms possessed two myosins VIII and five myosins XI, many of which underwent additional lineage-specific duplications.
Prevention of clinical and histological signs of proteolipid protein (PLP)-induced experimental allergic encephalomyelitis (EAE) in mice by the water-soluble carbon monoxide-releasing molecule (CORM)-A1
Authors: Fagone P , Mangano K , Quattrocchi C , Motterlini R , Di Marco R , Magro G , Penacho N , Romao C C , Nicoletti F 
Published: January 2011

Summary
We have evaluated the effects of the carbon monoxide-releasing molecule CORM-A1 [Na2(BH3CO2); ALF421] on the development of relapsing–remitting experimental allergic encephalomyelitis (EAE) in SJL mice, an established model of multiple sclerosis (MS). The data show that the prolonged prophylactic administration of CORM-A1 improves the clinical and histopathological signs of EAE, as shown by a reduced cumulative score, shorter duration and a lower cumulative incidence of the disease as well as milder inflammatory infiltrations of the spinal cords. This study suggests that the use of CORM-A1 might represent a novel therapeutic strategy for the treatment of multiple sclerosis.
Engagement of the B cell receptor for antigen differentially affects B cell responses to Toll-like receptor-7 agonists and antagonists in BXSB mice
Authors: Layer T , Steele A , Goeken J A , Fleenor S , Lenert P 
Published: January 2011

SummaryNucleic acid sensors of the Toll-like receptor (TLR) family play a well-established role in the pathogenesis of lupus. This is particularly true for a single-stranded RNA-sensing TLR-7 receptor, as lupus mice lacking TLR-7 show ameliorated disease. Cytosine–guanosine dinucleotide (CpG)-DNA-sensing TLR-9, conversely, has a complex regulatory role in systemic lupus erythematosus (SLE). Much less is known about whether signals through the B cell receptor for antigen (BCR) may affect the ability of B cells to respond to suboptimal TLR-7 agonists and antagonists. We studied this question in prediseased BXSB male and female B cells. We found that male B cells responded more vigorously to numerous TLR-7 ligands and this responsiveness was enhanced further upon co-engagement of the BCR. This synergy was seen primarily with the interleukin (IL)-6 secretion. A number of 32-mer inhibitory oligonucleotides (INH-ODNs) with a nuclease-resistant phosphorothioate backbone were capable of blocking TLR-7, but not BCR-induced B cell activation, with an inhibitory concentration (IC)50 of approximately 100 nm. Surprisingly, while the presence of a single TGC motif at the 5′ end of an ODN did not increase its inhibitory capacity, INH-ODNs containing multiple TGC motifs had greater inhibitory potency. When BCR and TLR-7 were co-engaged, INH-ODNs showed a differential effect on B cell activation. Whereas apoptosis protection and G1-M entry completely escaped suppression, IL-6 secretion remained sensitive to inhibition, although with a 10-fold lower potency. Our results suggest that while TLR-7 antagonists may be considered as lupus therapeutics, simultaneous co-engagement of the TLR-7 and BCR might favour autoreactive B cell survival. This hypothesis needs further experimental validation.
Functional and genomic analyses of blocked protein O‐mannosylation in baker's yeast
Authors: Arroyo Javier , Hutzler Johannes , Bermejo Clara , Ragni Enrico , García‐Cantalejo Jesús , Botías Pedro , Piberger Heidi , Schott Andrea , Sanz Ana Belén , Strahl Sabine 
Published: January 2011

SummaryO‐mannosylation is a crucial protein modification in eukaryotes that is initiated by the essential family of protein O‐mannosyltransferases (PMTs). Here we demonstrate that in the model yeast Saccharomyces cerevisiae rhodanine‐3‐acetic acid derivatives affect members of all PMT subfamilies. Specifically, we used OGT2468 to analyse genome‐wide transcriptional changes in response to general inhibition of O‐mannosylation in baker's yeast. PMT inhibition results in the activation of the cell wall integrity (CWI) pathway. Coinciding, the mitogen‐activated kinase Slt2p is activated in vivo and CWI pathway mutants are hypersensitive towards OGT2468. Further, induction of many target genes of the unfolded protein response (UPR) and ER‐associated protein degradation (ERAD) is observed. The interdependence of O‐mannosylation and UPR/ERAD is confirmed by genetic interactions between HAC1 and PMTs, and increased degradation of the ERAD substrate Pdr5p* in pmtΔ mutants. Transcriptome analyses further suggested that mating and filamentous growth are repressed upon PMT inhibition. Accordingly, in vivo mating efficiency and invasive growth are considerably decreased upon OGT2468 treatment. Quantitative PCR and ChIP analyses suggest that downregulation of mating genes is dependent on the transcription factor Ste12p. Finally, inhibitor studies identified a role of the Ste12p‐dependent vegetative signalling cascade in the adaptive response to inhibition of O‐mannosylation.