Home About us Contact
|
Home About us Contact | ||
|
|
||
Management Practices (management + practice)
Kinds of Management Practices Selected AbstractsHYDROLOGIC MODELING OF A BIOINFILTRATION BEST MANAGEMENT PRACTICE,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 5 2006William Heasom ABSTRACT: The goal of this research was to develop a methodology for modeling a bioinfiltration best management practice (BMP) built in a dormitory area on the campus of Villanova University in Pennsylvania. The objectives were to quantify the behavior of the BMP through the different seasons and rainfall events; better understand the physical processes governing the system's behavior; and develop design criteria. The BMP was constructed in 2001 by excavating within an existing traffic island, backfilling with a sand/soil mixture, and planting with salt tolerant grasses and shrubs native to the Atlantic shore. It receives runoff from the asphalt (0.26 hectare) and turf (0.27 hectare) surfaces of the watershed. Monitoring supported by the hydrologic model shows that the facility infiltrates a significant fraction of the annual precipitation, substantially reducing the delivery of nonpoint source pollution and erosive surges downstream. A hydrologic model was developed using HEC-HMS to represent the site and the BMP using Green-Ampt and kinematic wave methods. Instruments allow comparison of the modeled and measured water budget parameters. The model, incorporating seasonally variable parameters, predicts the volumes infiltrated and bypassed by the BMP, confirming the applicability of the selected methods for the analysis of bioinfiltration BMPs. [source] REEXAMINING BEST MANAGEMENT PRACTICES FOR IMPROVING WATER QUALITY IN URBAN WATERSHEDS,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 5 2003Stephen R. Pennington ABSTRACT: Municipalities will be implementing structural best management practices at increasing rates in their effort to comply with Phase II of the National Pollutant Discharge Elimination System (NPDES). However, there is evidence that structural best management practices (BMPs) by themselves may be insufficient to attain desired water quality standards. This paper reports on an analysis of the median removal efficiencies of structural BMPs and compares them to removal efficiencies estimated as being necessary to attain water quality standards in the Rouge River in Detroit, Michigan. Eight water quality parameters are reviewed using data collected from 1994 to 1999 in the Rouge River. Currently, five of the eight parameters in the Rouge River including bacteria, biochemical oxygen demand, and total suspended solids (TSS) exceed the required water quality standards. The reported analysis of structural BMP efficiencies reveals that structural BMPs appear capable of reducing only some of the pollutants of concern to acceptable levels. [source] Principles for Public Management Practice: From Dichotomies to InterdependenceGOVERNANCE, Issue 3 2001Martha S. Feldman In this essay we explore the relationship between management practices and a basic governance dilemma: how to manage flexibly and accountably. The challenge is both practical and theoretical. Managers must respond flexibly to the changing demands and expectations of the public and the ever-changing nature of public problems, yet they must do so in a manner that provides accountability to the public and political overseers. A dichotomous approach to the study of leadership as management action and the governance structures within which managers operate has inhibited the search for a public management theory that reconciles the dilemma. Emphasis upon managers as leaders typically focuses on the flexible actions managers might take to overcome structural "barriers," while emphasis upon governance structures typically focuses on the essential role of structure in ensuring accountability and restraining or motivating particular management efforts. The practicing manager, however, cannot deal with these aspects of the work separately. Managers must attend to demands for both flexible leadership action and structures that promise accountability. Anecdotal evidence provides illustrations of some of the ways that managers can integrate these demands. We suggest that these efforts point to an alternative theoretical framework that understands action and structure as mutually constitutive, creating a dynamic tension in which attention to one requires attention to the other. [source] Delineating runoff processes and critical runoff source areas in a pasture hillslope of the Ozark HighlandsHYDROLOGICAL PROCESSES, Issue 21 2008M. D. Leh Abstract The identification of runoff contributing areas would provide the ideal focal points for water quality monitoring and Best Management Practice (BMP) implementation. The objective of this study was to use a field-scale approach to delineate critical runoff source areas and to determine the runoff mechanisms in a pasture hillslope of the Ozark Highlands in the USA. Three adjacent hillslope plots located at the Savoy Experimental Watershed, north-west Arkansas, were bermed to isolate runoff. Each plot was equipped with paired subsurface saturation and surface runoff sensors, shallow groundwater wells, H-flumes and rain gauges to quantify runoff mechanisms and rainfall characteristics at continuous 5-minute intervals. The spatial extent of runoff source areas was determined by incorporating sensor data into a geographic information-based system and performing geostatistical computations (inverse distance weighting method). Results indicate that both infiltration excess runoff and saturation excess runoff mechanisms occur to varying extents (0,58% for infiltration excess and 0,26% for saturation excess) across the plots. Rainfall events that occurred 1,5 January 2005 are used to illustrate the spatial and temporal dynamics of the critical runoff source areas. The methodology presented can serve as a framework upon which critical runoff source areas can be identified and managed for water quality protection in other watersheds. Copyright © 2008 John Wiley & Sons, Ltd. [source] New Trends in Crisis Management Practice and Crisis Management Research: Setting the AgendaJOURNAL OF CONTINGENCIES AND CRISIS MANAGEMENT, Issue 4 2001Paul 't Hart [source] Foreign Direct Investment in the UK 1985,1994: The Impact on Domestic Management PracticeJOURNAL OF MANAGEMENT STUDIES, Issue 1 2000John Child Foreign direct investment (FDI) into the UK has grown considerably in recent years. US, French, German and Japanese companies have generally accounted for the largest share of this FDI. In addition to greenfield and expansion investment, a major vehicle for inward FDI has been the acquisition of UKcompanies. This paper examines whether nationally distinct approaches to management were introduced, following acquisition, among a sample of 201 UK subsidiaries of French, German, Japanese,US and UK companies. It provides data on the extent of changes and the post-acquisition influence of the new parent, comparing changes between the four foreign nationalities and a UK control group. The study indicates that the process of being acquired and controlled by a foreign parent company was often followed by significant changes in management practice. Some changes were common to all acquisitions, including those by UK companies. A shift towards performance-related rewards and a stronger quality emphasis in operations are two examples. In addition, there was also evidence of effects which differed between nationalities. These conformed to accepted characterizations of national management practice in the case of Japanese and US acquirers, but less so in the case of French and German acquisitions. The findings suggest that present views of French and German management practice require further investigation. [source] The Conventions of Management Research and their Relevance to Management PracticeBRITISH JOURNAL OF MANAGEMENT, Issue 2 2002M. Kelemen This paper recognizes the failure of management research to communicate with practitioners, and speculates over the reasons why this may be the case. It is possible that the researchers' interests may not always coincide with management practitioners'; however, even when such interests are congruent, it seems that relatively little management research is published in practitioner journals. We suggest that this is because academic research is written in a style that tends to alienate most practitioners. This paper isolates the stylistic conventions associated with research targeted to academics (typically published in academic journals) and research targeted to practitioners (typically published in practitioner-oriented journals). Such stylistic differences are illustrated through a study of organizational change whose findings have been published in both academic and practitioner format, namely in the Administrative Science Quarterly and the Harvard Business Review. We suggest that the gap between these two types of research could be narrowed through processes of translation (i.e. academic jargon could be translated in practitioner language). In addition we might consider greater use of Mode 2 research over Mode 1 research (academic). Mode 2 research presupposes that teams of academics and practitioners assemble to define the research problem and methodology in terms appropriate to a particular context and in a way that accounts for all existing interests so that translation processes are seamless. However, Mode 2 creates its own gap in that the knowledge is more contextual and may not reach a wide audience. [source] Effect of Evidence-Based Acute Pain Management Practices on Inpatient CostsHEALTH SERVICES RESEARCH, Issue 1 2009John M. Brooks Objectives. To estimate hospital cost changes associated with a behavioral intervention designed to increase the use of evidence-based acute pain management practices in an inpatient setting and to estimate the direct effect that changes in evidence-based acute pain management practices have on inpatient cost. Data Sources/Study Setting. Data from a randomized "translating research into practice" (TRIP) behavioral intervention designed to increase the use of evidence-based acute pain management practices for patients hospitalized with hip fractures. Study Design. Experimental design and observational "as-treated" and instrumental variable (IV) methods. Data Collection/Extraction Methods. Abstraction from medical records and Uniform Billing 1992 (UB92) discharge abstracts. Principal Findings. The TRIP intervention cost on average $17,714 to implement within a hospital but led to cost savings per inpatient stay of more than $1,500. The intervention increased the cost of nursing services, special operating rooms, and therapy services per inpatient stay, but these costs were more than offset by cost reductions within other cost categories. "As-treated" estimates of the effect of changes in evidence-based acute pain management practices on inpatient cost appear significantly underestimated, whereas IV estimates are statistically significant and are distinct from, but consistent with, estimates associated with the intervention. Conclusions. A hospital treating more that 12 patients with acute hip fractures can expect to lower overall cost by implementing the TRIP intervention. We also demonstrated the advantages of using IV methods over "as-treated" methods to assess the direct effect of practice changes on cost. [source] Human Resource Management Practices at Subsidiaries of Multinational Corporations and Local Firms in TaiwanINTERNATIONAL JOURNAL OF SELECTION AND ASSESSMENT, Issue 1 2000Tung-Chun Huang Global competition has forced corporations to invest overseas in order to gain or maintain competitive advantage. International investment entails not only the movement of capital, machinery, and products but also the spread of corporate cultures to host countries. This is so because, to maintain managerial consistency among its branches, a multinational corporation (MNC) will attempt to transplant its management system to any country in which it invests.However, it is also recognized that cultural contexts differ markedly among nations, and that multinational firms must adjust their management practices to accommodate specific conditions in host-country environments. [source] Kaiser Permanente Community Partners Project: Improving Geriatric Care Management PracticesJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 5 2003Susan M. Enguidanos MPH This article describes a geriatric care management project that is testing whether geriatric care management plus a brief purchase of service (POS) intervention will lower medical costs, improve satisfaction with care, increase care plan adherence, and improve perceived quality of life. Kaiser Permanente members aged 65 and older who were eligible for geriatric care management and consented to participate in the study were randomized to one of four study groups: information and referral via mail, telephone care management, geriatric care management, or geriatric care management with POS capability. The POS intervention provides up to $2,000 of designated, paid services including in-home supportive services, transportation, respite, or medical equipment within the first 6 months of care management enrollment. Approximately 1,400 senior members were referred to the geriatric care management program, and 451 were randomly assigned to one of the four study groups. Those enrolled in the geriatric care management program were significantly more likely to be ethnic minorities and have lower income than the general Kaiser Permanente senior enrollment. Barriers encountered in implementing the POS intervention included establishing contractual agreements between Kaiser Permanente and private and community agencies, locating adequate and sufficient community agencies to provided needed services, monitoring service contracts, and delaying use of the POS benefit. [source] Weight Management Practices Among Primary Care ProvidersJOURNAL OF THE AMERICAN ACADEMY OF NURSE PRACTITIONERS, Issue 4 2000Gayle M. Timmerman RN ABSTRACT This pilot study examined how primary care providers manage patients with weight problems, an important component of primary care. A convenience sample of 17 nurse practitioners and 15 physicians were surveyed about assessments and interventions used in practice for weight management along with perceived barriers to providing effective weight management. Practice patterns between gender, profession and practice setting of the nurse practitioners were compared. [source] WATER QUALITY MODELING OF ALTERNATIVE AGRICULTURAL SCENARIOS IN THE U.S. CORN BELT,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 3 2002Kellie B. Vaché ABSTRACT: Simulated water quality resulting from three alternative future land-use scenarios for two agricultural watersheds in central Iowa was compared to water quality under current and historic land use/land cover to explore both the potential water quality impact of perpetuating current trends and potential benefits of major changes in agricultural practices in the U.S. Corn Belt. The Soil Water Assessment Tool (SWAT) was applied to evaluate the effect of management practices on surface water discharge and annual loads of sediment and nitrate in these watersheds. The agricultural practices comprising Scenario 1, which assumes perpetuation of current trends (conversion to conservation tillage, increase in farm size and land in production, use of currently-employed Best Management Practices (BMPs)) result in simulated increased export of nitrate and decreased export of sediment relative to the present. However, simulations indicate that the substantial changes in agricultural practices envisioned in Scenarios 2 and 3 (conversion to conservation tillage, strip intercropping, rotational grazing, conservation set-asides and greatly extended use of best management practices (BMPs) such as riparian buffers, engineered wetlands, grassed waterways, filter strips and field borders) could potentially reduce current loadings of sediment by 37 to 67 percent and nutrients by 54 to 75 percent. Results from the study indicate that major improvements in water quality in these agricultural watersheds could be achieved if such environmentally-targeted agricultural practices were employed. Traditional approaches to water quality improvement through application of traditional BMPs will result in little or no change in nutrient export and minor decreases in sediment export from Corn Belt watersheds. [source] ,High-performance' Management Practices, Working Hours and Work,Life BalanceBRITISH JOURNAL OF INDUSTRIAL RELATIONS, Issue 2 2003Michael White The effects of selected high-performance practices and working hours on work,life balance are analysed with data from national surveys of British employees in 1992 and 2000. Alongside long hours, which are a constant source of negative job-to-home spillover, certain ,high-performance' practices have become more strongly related to negative spillover during this period. Surprisingly, dual-earner couples are not especially liable to spillover , if anything, less so than single-earner couples. Additionally, the presence of young children has become less important over time. Overall, the results suggest a conflict between high-performance practices and work-life balance policies. [source] Emotion Work and Emotion Space: Using a Spatial Perspective to Explore the Challenging of Masculine Emotion Management PracticesBRITISH JOURNAL OF MANAGEMENT, Issue 2008Patricia Lewis This paper sets out to investigate the possibility that employees may challenge management through their colonization of work space, facilitated by the transportation of ,private' behaviours and activities into the ,public' world of organization. It does this within the context of a broader project on the management of emotions within a special care baby unit characterized as a high risk, emergency working environment. Focusing on the experience of night nurses and drawing on the concept of differential space the article seeks to demonstrate how the dominant form of emotion work (characterized as masculine) on the unit may be contested. This is done through the creation of the unit at night as a space of empowerment, achieved through the visible enactment of a feminized form of emotion work. In this sense the analysis explores how the performance of feminine emotion work can be understood as acts of spatial resistance to the authority of the masculine emotion regime. In other words night nurses make the special care baby unit into a space which challenges the masculinist emotion management which dominates the unit. It will be suggested that our understanding of the performance of emotion management practices in particular and management practices in general may be limited if space is ignored. [source] Best Management Practices and the Production of Good and Bad OutputsCANADIAN JOURNAL OF AGRICULTURAL ECONOMICS, Issue 3 2010Pascal L. Ghazalian Agricultural activities simultaneously produce good and bad outputs. A translog cost function is used to evaluate the cost associated with reduction of chemical runoff and how it is influenced by the scale of crop and animal production. The results show that reducing runoff entails increasing costs and that these costs decrease with the level of crop production, but are unaffected by the level of animal production. The estimates of the cost elasticities of Best Management Practices (BMPs) were all positive, but many have large standard errors that imply that the true elasticities can be much lower or much higher. Also, the cost elasticities decrease with the scale of crop production for most BMPs whereas the scale of animal production has the opposite effect for crop rotation and herbicide control practices. Our results reaffirm that there are economies of size in production. L'agriculture produit de bons et de mauvais extrants. Une fonction de coût translog est utilisée pour évaluer les coûts associés à l'amélioration de la qualité de l'eau en réduisant les problèmes de ruissellement et de transfert de nutriments. Nous évaluons comment ces coûts changent avec les niveaux des productions animales et de cultures. Nos résultats indiquent que la réduction des transferts de nutriments est coûteux mais que l'élasticité-coût décroit avec la valeur des cultures produites tout en étant indépendant de l'envergure de la production animale. Les élasticités-coût associés aux pratiques environnementales (PE) sont positives et ont de grandes erreur-types, ce qui veut dire que les vraies élasticités peuvent être beaucoup plus grandes ou plus petites. Les élasticités-coût pour la plupart des PE diminuent avec la production de cultures produit tandis que la taille de la production animale a un effet contraire sur les élasticités pour la rotation de cultures et le contrôle des herbicides. Nos résultats confirment qu'il existe d'importantes économies de taille à exploiter en agriculture. [source] States, Social Policies and Globalisations Arguing on the Right Terrain?IDS BULLETIN, Issue 4 2000Mick Moore Summaries The debate about future social policies in OECD countries is framed in the light of rich country concerns, notably of a ,welfare state at risk'. Because globalisation processes can plausibly be presented as a major source of threat, there is a temptation to generalise the analysis globally, and to assume that social policy issues in poor countries are fundamentally the same as in OECD states. The debate about the future of social policy in poor countries should not be framed in terms of OECD concerns. Three more specific points underpin this general argument: (a) Economic globalisation is not necessarily a threat. There are good historical reasons for believing that it may create political pressures to extend as well as to shrink social provision in poor countries; (b) There is a fundamental problem of state incapacity in much of the poor world that makes many OECD-based arguments about the proper role of the state appear redundant. Greater state capacity will itself lead to more effective social policies; and (c) It makes little sense for poor countries to resist, on grounds of potential adverse impacts on social policy, the trends toward the adoption of either New Public Management practices or the broader shift from ,positive' to regulatory states. Whatever changes occur in the architecture of poor states, more effective regulation will remain an urgent need. [source] Iron Deficiency in Stabled Dutch Warmblood FoalsJOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 5 2001H. Brommer Forty-three Dutch Warmblood foals were divided at random into 3 rearing groups immediately after birth: a box-rest group, a box-rest with exercise group, and a pasture group. All stabled foals (box-rest and exercise groups) were fed freshly cut grass harvested from the same pastures on which the pasture group foals were grazing. Blood samples were obtained monthly for CBC and biochemical analyses. At 1,3 months of age, the foals at pasture were active but the foals in the box-rest and exercise groups were listless. Mean hemoglobin concentrations, PCVs, blood iron concentrations, and saturation of total iron binding capacity were significantly lower (P < .05) in the box-rest group (11.3 ± 1.2 g/dL, 33 ± 3%, 123 ± 67 ,g/dL, and 18 ± 9%) and the exercise group (11.6 ± 1.5 g/dL, 34 ± 4%, 101 ± 61 ,g/dL, and 15 ± 10%) compared with the pasture group (14.0 ± 0.8 g/dL, 42 ± 3%, 212 ± 67 ,g/dL, and 32 ± 10%). Oral supplementation of iron to all foals resulted in significant increases in the values of these variables in the box-rest group and exercise group at 4,5 months of age, and the stabled foals were as active as the foals at pasture. In the pasture group, no significant changes occurred. Management practices clearly influence the iron state in young growing foals from 1 to 3 months of age, and although not a frequent cause of anemia in the horse, an absolute deficit of body iron may occur in stabled foals fed freshly cut grass. [source] Soil carbon sequestration in China through agricultural intensification, and restoration of degraded and desertified ecosystems,LAND DEGRADATION AND DEVELOPMENT, Issue 6 2002R. Lal Abstract The industrial emission of carbon (C) in China in 2000 was about 1,Pg,yr,1, which may surpass that of the United States (1,84,Pg,C) by 2020. China's large land area, similar in size to that of the United States, comprises 124,Mha of cropland, 400,Mha of grazing land and 134,Mha of forestland. Terrestrial C pool of China comprises about 35,60,Pg in the forest and 120,186,Pg in soils. Soil degradation is a major issue affecting 145,Mha by different degradative processes, of which 126,Mha are prone to accelerated soil erosion. Total annual loss by erosion is estimated at 5,5,Pg of soil and 15,9,Tg of soil organic carbon (SOC). Erosion-induced emission of C into the atmosphere may be 32,64,Tg,yr,1. The SOC pool progressively declined from the 1930s to 1980s in soils of northern China and slightly increased in those of southern China because of change in land use. Management practices that lead to depletion of the SOC stock are cultivation of upland soils, negative nutrient balance in cropland, residue removal, and soil degradation by accelerated soil erosion and salinization and the like. Agricultural practices that enhance the SOC stock include conversion of upland to rice paddies, integrated nutrient management based on liberal use of biosolids and compost, crop rotations that return large quantities of biomass, and conservation-effective systems. Adoption of recommended management practices can increase SOC concentration in puddled soil, red soil, loess soils, and salt-affected soils. In addition, soil restoration has a potential to sequester SOC. Total potential of soil C sequestration in China is 105,198,Tg,C,yr,1 of SOC and 7,138,Tg,C,yr,1 for soil inorganic carbon (SIC). The accumulative potential of soil C sequestration of 11,Pg at an average rate of 224,Tg,yr,1 may be realized by 2050. Soil C sequestration potential can offset about 20 per cent of the annual industrial emissions in China. Copyright © 2002 John Wiley & Sons, Ltd. [source] Management practices and risk of occupational blood exposure in U.S. paramedics: NeedlesticksAMERICAN JOURNAL OF INDUSTRIAL MEDICINE, Issue 9 2010Jack K. Leiss PhD Abstract Background The purpose of this study was to present risk estimates for needlestick in U.S. paramedics and estimated risk ratios for selected management practices. Methods A mail survey was conducted among a national sample of U.S. paramedics in 2002,2003. Results The adjusted response rate was 55% (n,=,2,664). The overall 12-month risk of needlestick was 6.7% (95% confidence interval, 5.4,7.9). Risk ratios for provision of safety-engineered medical devices and two supervisory behaviors that emphasized safe work practices ranged from 2.5 to 3.2. The protective effect of working in an environment that included both of the supervisory behaviors was greater than the protective effect of always being provided with safety devices. A sensitivity analysis indicated that the risk ratio estimates were unlikely to be inflated by nonresponse bias. Conclusions These results suggest that greater provision of safety devices and interventions aimed at management practices that promote worker safety could substantially reduce the risk of needlestick among U.S. paramedics. Am. J. Ind. Med. 53:866,874, 2010. © 2010 Wiley-Liss, Inc. [source] Density effects of silver carp Hypophthalmichthys molitrix and catla Catla catla on the production system in all-male freshwater prawn,finfish polyculture pondsAQUACULTURE RESEARCH, Issue 10 2010Sheikh Md. Abstract The effects of three different combinations of silver carp Hypophthalmichthys molitrix and catla Catla catla density on the production system in all-male freshwater prawn,finfish polyculture ponds were evaluated in triplicate. The stocking density of silver carp and catla, respectively, were maintained at 2000 and 500 ha,1 in treatment SC2000C500, 1500 and 1000 ha,1 in treatment SC1500C1000 and 1000 and 1500 ha,1 in treatment SC1000C1500. Male freshwater prawn Macrobrachium rosenbergii and small fish mola Amblypharyngodon mola densities were fixed in all treatments at 12 000 and 20 000 ha,1 respectively. Management practices were same for all treatments. Blue-clawed male prawns were harvested twice during the 122-day culture at 15-day intervals before the final harvest. Plankton and macro-benthos abundance and water quality parameters (except transparency and chlorophyll a) did not vary significantly (P>0.05) among treatments. Mean final weights of both silver carp and catla were decreased with the increasing of their own stocking density. The treatment SC1500C1000 resulted in 25,32% increased net production of silver carp plus catla (461 kg ha,1) and 20,21% increased net production of all species combined (874 kg ha,1) as compared with the other treatments, although the differences in production of prawn and mola among treatments were not significant. [source] Activity pattern of the marine shrimp Litopenaeus vannamei (Boone 1931) in laboratory as a function of different feeding frequenciesAQUACULTURE RESEARCH, Issue 1 2009Patrícia Pereira De Lima Abstract Management practices on most Brazilian shrimp farms have resulted in high expenses for producers and damage to the environment. Applied ethology could provide information on the pattern of shrimp activity, enabling more efficient feeding frequencies. Behavioural activities of the shrimp Litopenaeus vannamei were recorded during different feeding frequencies. The shrimp were kept in aquariums on a 12:12 h light/dark cycle. They were fed commercial ration three (at 6:00, 12:00 and 18:00 hours), four (at 6:00, 10:00, 14:00 and 18:00 hours) or seven times per day (at 6:00. 8:00, 10:00, 12:00, 14:00, 16:00 and 18:00 hours). We observed animals at 15 min,1 aquarium,1 time periods, recording feeding, substrate exploration, swimming and inactivity. Feeding and exploration were the highest for shrimp fed three times per day, swimming was greatest when animals received four feedings, whereas inactivity was higher for shrimp fed seven times per day. There was greater food ingestion between 12:00 and 14:00 hours for animals fed three and four times per day, whereas swimming was high mainly at 18:00 hours for shrimp fed three and seven times per day. The results indicate higher forage-related activities (exploration/ingestion) when feed was offered three or four times, suggesting optimization in the pattern of shrimp activities based on these feeding frequencies. [source] Grassland invertebrate assemblages in managed landscapes: Effect of host plant and microhabitat architectureAUSTRAL ECOLOGY, Issue 6 2007ADELE M. REID Abstract Grasslands are often considered as two-dimensional habitats rather than complex, multilayered habitats. However, native grasslands are complex habitats, with multiple layers of annual and perennial grasses, sedges, shrubs and mosses. Vegetation complexity, including plant type, quality and three-dimensional structure is important for providing a variety of food and habitat resources for insects. Grazing by domestic livestock can affect these processes through the loss or fragmentation of habitats, as well as altering the vertical and horizontal vegetation structure. This study aimed to investigate the role of host plants and microhabitat architecture for determining foliage invertebrate assemblages. Different plant species supported distinct invertebrate assemblages and less complex host plants supported fewer invertebrate individuals and species. Manipulations of plant architecture changed the species composition of invertebrates, with most species found in more complex vegetation. This study illustrates the importance of host diversity and pasture complexity for invertebrate communities. Management practices that encourage a heterogeneous environment with diverse and structurally complex pastures should also sustain a more diverse and functional invertebrate assemblage. [source] Windblown dust influenced by conventional and undercutter tillage within the Columbia Plateau, USA,EARTH SURFACE PROCESSES AND LANDFORMS, Issue 10 2009B. S. Sharratt Abstract Exceedance of the US Environmental Protection Agency national ambient air quality standard for PM10 (particulate matter ,10 µm in aerodynamic diameter) within the Columbia Plateau region of the Pacific Northwest US is largely caused by wind erosion of agricultural lands managed in a winter wheat,summer fallow rotation. Land management practices, therefore, are sought that will reduce erosion and PM10 emissions during the summer fallow phase of the rotation. Horizontal soil flux and PM10 concentrations above adjacent field plots (>2 ha), with plots subject to conventional or undercutter tillage during summer fallow, were measured using creep and saltation/suspension collectors and PM10 samplers installed at various heights above the soil surface. After wheat harvest in 2004 and 2005, the plots were either disked (conventional) or undercut with wide sweeps (undercutter) the following spring and then periodically rodweeded prior to sowing wheat in late summer. Soil erosion from the fallow plots was measured during six sampling periods over two years; erosion or PM10 loss was not observed during two periods due to the presence of a crust on the soil surface. For the remaining sampling periods, total surface soil loss from conventional and undercutter tillage ranged from 3 to 40 g m,2 and 1 to 27 g m,2 while PM10 loss from conventional and undercutter tillage ranged from 0·2 to 5·0 g m,2 and 0·1 to 3·3 g m,2, respectively. Undercutter tillage resulted in a 15% to 65% reduction in soil loss and 30% to 70% reduction in PM10 loss as compared with conventional tillage at our field sites. Therefore, based on our results at two sites over two years, undercutter tillage appears to be an effective management practice to reduce dust emissions from agricultural land subject to a winter wheat,summer fallow rotation within the Columbia Plateau. Copyright © 2009 John Wiley & Sons, Ltd. [source] Using framing parameters to improve handling of uncertainties in water management practiceENVIRONMENTAL POLICY AND GOVERNANCE, Issue 2 2010Nicola Isendahl Abstract Management of water resources is afflicted with uncertainties. Nowadays it is facing more and new uncertainties since the pace and dimension of changes (e.g. climatic, demographic) are accelerating and are likely to increase even more in the future. Hence it is crucial to find pragmatic ways to deal with these uncertainties in water management. We argue for an analytical yet pragmatic approach to enable decision-makers to deal with uncertainties in a more explicit and systematic way and allow for better informed decisions. Our approach is based on the concept of framing, referring to the different ways in which people make sense of the world and of the uncertainties. We apply recently developed parameters of the framing of uncertainty in two sub-basins of the Rhine, the Dutch Kromme Rijn and the German Wupper. We present and discuss the results of a series of stakeholder interactions in the two basins aimed at developing strategies for improving dealing with uncertainties. The strategies are amended and synthesized in a check-list based on the uncertainty framing parameters as a hands-on tool for systematically identifying improvement options when dealing with uncertainty in water management practice. We conclude with suggestions for testing the developed check-list as a tool for decision aid in water management practice. Copyright © 2010 John Wiley & Sons, Ltd and ERP Environment. [source] Use of vegetative furrows to mitigate copper loads and soil loss in runoff from polyethylene (plastic) mulch vegetable production systemsENVIRONMENTAL TOXICOLOGY & CHEMISTRY, Issue 3 2004Pamela J. Rice Abstract The transport of runoff with high copper concentrations and sediment loads into adjacent surface waters can have adverse effects on nontarget organisms as a result of increased turbidity and degraded water quality. Runoff from vegetable production utilizing polyethylene mulch can contain up to 35% of applied copper, a widely used fungicide/bactericide that has adverse effects on aquatic organisms. Copper is primarily transported in runoff with suspended particulates; therefore, implementation of management practices that minimize soil erosion will reduce copper loads. Replacing bare-soil furrows with furrows planted in rye (Secale cereale) significantly improved the sustainability of vegetable production with polyethylene mulch and reduced the potential environmental impact of this management practice. Vegetative furrows decreased runoff volume by >40% and soil erosion by >80%. Copper loads with runoff were reduced by 72% in 2001, primarily as a result of reduced soil erosion since more than 88% of the total copper loads were transported in runoff with suspended soil particulates. Tomato yields in both years were similar between the polyethylene mulch plots containing either bare-soil or vegetative furrows. Replacing bare-soil furrows with vegetative furrows greatly reduces the effects of sediments and agrochemicals on sensitive ecosystems while maintaining crop yields. [source] Survival of stocked Atlantic salmon and coarse fish and an evaluation of costsFISHERIES MANAGEMENT & ECOLOGY, Issue 3-4 2004M. W. Aprahamian Abstract The stocking of fish represents a major activity in current fisheries management practice. To maximise benefit to the environment in general and to fisheries in particular, optimal stocking strategies need to be developed. Examples from two studies, one involving Atlantic salmon, Salmo salar L., and the other involving three coarse fish species, are used to illustrate how such strategies might be developed. Atlantic salmon fed fry (age 0+) were stocked into eight streams in the North West of England at densities ranging from 1 to 4 m,2 over a period of up to 3 years to evaluate survival to the end of the first and second growing periods. Survival to the end of the first growing period (mean duration 108 days) varied between 1.2 and 41.3% with a mean of 20.45% and CV of 0.53. Survival from the end of the first growing period to the end of the second growing period (mean duration 384 days) ranged from 19.9 to 34.1% with a mean of 26.3% and a CV of 0.21. Hatchery-reared roach, Rutilus rutilus (L.), chub, Leuciscus cephalus (L.) and dace, Leuciscus leuciscus (L.), were stocked into four rivers to determine the optimal age and season which would maximise survival over a 6-month post-stocking period. Post-stocking persistence within the stocked reaches was generally low; the highest level of persistence was estimated at only 33.8%. However, most of the estimates of persistence were considerably lower and (in practical terms) approached zero in several instances. The analysis indicated that river-specific factors are important in determining the success of stocking exercises. The survival estimates derived from these two studies were compared with other published estimates. [source] Analysis of a Japanese Black Cattle-rearing system utilizing a bahiagrass (Paspalum notatum Flügge) pasture: 3.GRASSLAND SCIENCE, Issue 3 2006Intake from pasture Abstract A Japanese Black Cattle-rearing system utilizing a bahiagrass (Paspalum notatum Flügge) pasture in coastal Miyazaki, southern Japan, was analyzed in terms of intake from pasture. In a field approach, herbage intake by grazing cattle was measured for nine periods (1,5 days) during a grazing season (May,October) along with some other variables (e.g. air temperature, herbage mass, digestibility of grazed herbage), under varying levels of supplementary feeding. The intake from the pasture was most closely related to the intake of supplement, showing a negative linear response at a substitution rate of 0.736,0.750. The intake under no supplementation, i.e. a maximum intake from the pasture, was lower than the voluntary intake predicted with feeding standards. In a modeling approach, a semi-mechanistic model for predicting grazing intake was developed using information from the literature as well as the field data. The performance of the model was acceptable. The model showed similar substitution rates (0.64,0.69), and considerable intake restriction (nearly 30%) that is not attributable to limitations by herbage mass, herbage allowance, diet digestibility or air temperature. The results indicate that a low maximal intake by the animals due to low grazing motivation is a major characteristic of the system where supplementation is a usual management practice. [source] Evaluating human capital: an exploratory study of management practiceHUMAN RESOURCE MANAGEMENT JOURNAL, Issue 4 2004Juanita Elias The article explores the development of systems of human capital evaluation in a number of large UK firms. Human capital is a much used term in business literature, and it is widely recognised that firms need to develop mechanisms to determine the value of their employee base. An extensive human capital literature has developed in which the authors propose elaborate systems for measuring a firm's human assets. This article does not seek to offer yet another human capital model. Rather, the aim is to examine the management practices through which human capital evaluation is undertaken. The article is based on an exploratory study of such practices in 11 major firms in the UK. The findings are highlighted as follows. First, we note the preference for internal over external (static accountancy-based) reporting. Secondly, we highlight the diverse nature of human capital evaluation systems that exist across UK business. Thirdly, we explore the relationship between practices of evaluation and the role and position of the HR function within the firm. Finally, in conclusion, we address the implications of the human capital perspective for practitioners, arguing that there is no single formula that can be applied to its evaluation. We go on to suggest that the importance of the human capital concept and its measurement may lie in its ability to re-frame perceptions of the relationship between the contribution of employees and the competitive performance of the business. [source] Knowledge management practice in Scottish law firmsHUMAN RESOURCE MANAGEMENT JOURNAL, Issue 2 2002Laurie Hunter Law firms, as part of the professional services sector, are increasingly engaged in strategic thinking about business growth and development. The management of partners, staff and their knowledge is critical to this strategic development. This study of a sample of Scottish law firms engaged in commercial and corporate law finds that organisations are at different stages of progress, and that change has focused more on technical solutions than on organisational and HR issues. Based on evidence from partners and management, and on attitude data from salaried staff, the article suggests that, although the traditional professional firm's interest in building and leveraging its human capital is still present, the underlying social and cultural processes involving motivation, sharing of experiences, coaching and mentoring are relatively underdeveloped. The implications for HR strategy and practice, and for the role of the HR manager, are considered. [source] Using GIS and a digital elevation model to assess the effectiveness of variable grade flow diversion terraces in reducing soil erosion in northwestern New Brunswick, CanadaHYDROLOGICAL PROCESSES, Issue 23 2009Qi Yang Abstract Flow diversion terraces (FDT) are commonly used beneficial management practice (BMP) for soil conservation on sloped terrain susceptible to water erosion. A simple GIS-based soil erosion model was designed to assess the effectiveness of the FDT system under different climatic, topographic, and soil conditions at a sub-basin level. The model was used to estimate the soil conservation support practice factor (P -factor), which inherently considered two major outcomes with its implementation, namely (1) reduced slope length, and (2) sediment deposition in terraced channels. A benchmark site, the agriculture-dominated watershed in northwestern New Brunswick (NB), was selected to test the performance of the model and estimated P -factors. The estimated P -factors ranged from 0·38,1·0 for soil conservation planning objectives and ranged from 0·001 to 0·45 in sediment yield calculations for water-quality assessment. The model estimated that the average annual sediment yield was 773 kg ha,1 yr ,1 compared with a measured value of 641 kg ha,1 yr,1. The P -factors estimated in this study were comparable with predicted values obtained with the revised universal soil loss equation (RUSLE2). The P -factors from this study have the potential to be directly used as input in hydrological models, such as the soil and water assessment tool (SWAT), or in soil conservation planning where only conventional digital elevation models (DEMs) are available. Copyright © 2009 John Wiley & Sons, Ltd. [source] | ||||||||||||||||||||||||||||||||||||||||||||||