scholarly journals Modeling seasonal emergence of Poa annua in urban greenspace

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dallas R. Taylor ◽  
Michael Prorock ◽  
Brandon J. Horvath ◽  
James T. Brosnan
Keyword(s):  
Ecosystem Services ◽  
Linear Models ◽  
Seedling Emergence ◽  
Field Research ◽  
Poa Annua ◽  
Future Research ◽  
Ex Post ◽  
Emergence Patterns ◽  
Urban Greenspaces ◽  
Herbicide Mixtures

AbstractTurfgrasses are perennial components of urban greenspaces found in parks, recreational areas, golf courses, sports fields, and lawns that confer many ecosystem services. A copious seed producer, Poa annua is the most troublesome weed of turfgrass and continually threatens the ecosystem services provided by urban greenspaces. Field research was conducted in Knoxville, TN to better understand environmental conditions triggering P. annua seedling emergence patterns to assist managers with optimally timing interventions—both chemical and non-chemical—for control. Fluctuations in cooling degree day (CDD21C) accumulation accounted for 82% of the variance in yearly cumulative P. annua emergence data collected in a single irrigated sward of hybrid bermudagrass [C. dactylon (L.) Pers. x. C. transvaalensis Burtt-Davy]. However, non-linear models using CDD21C data developed ex post were not able to accurately predict P. annua emergence patterns ex ante. In both years, P. annua emergence changed most rapidly between the 40th and 43rd week of the year when seven-day mean soil temperature and rainfall were 18.9 °C and 12.7 mm, respectively. Future research should explore the efficacy of herbicide mixtures applied when P. annua emergence is most rapidly changing in lieu of developing models to predict when specific emergence thresholds occur.

The balanced scorecard’s missing link to compensation

2014 ◽  
Vol 10 (4) ◽  
pp. 431-465 ◽  
Author(s):  
Oana Alexandra Albertsen ◽  
Rainer Lueg
Keyword(s):  
Organizational Performance ◽  
Research Design ◽  
Balanced Scorecard ◽  
Small And Medium Enterprises ◽  
Empirical Studies ◽  
Field Research ◽  
Future Research ◽  
Content Type ◽  
Future Research Agenda ◽  
Ex Post

Purpose – This paper aims to review the literature on the balanced scorecard (BSC) system. The BSC may well be one of the most popular performance measurement systems, but this is not synonymous with successful. The inventors of the BSC, Kaplan and Norton, actually emphasize that a BSC can only really impact the organizational performance if it is linked to the actors’ intrinsic and extrinsic incentives. As BSC has existed for more than 20 years, the authors find it relevant to survey the extant literature which elaborates on the BSC-incentives link within organizations. Design/methodology/approach – This paper identifies 117 empirical studies from leading academic journals published between 1992 and 2012 and then assesses 30 of these studies, which present the BSC-compensation link within the BSC literature. The authors analyze both research design (authors’ perspective) and the actual findings in the field (organizations’ perspective). Findings – First, it was found that only 30 of 117 empirical studies have a research design that is comprehensive enough to capture a full BSC as suggested by Kaplan and Norton, and only six of these studies elaborate on the link between the BSC and compensation. Second, extant research lacks valid constructs for the BSC and focuses too much on planning (ex-ante) with the BSC and not sufficiently on evaluation and control (ex-post). Third, the authors demonstrate that empirical BSC literature relies very strongly on field research in small and medium enterprises compared to similar research. Overall, the authors claim that the “relevance” of the BSC remains unproven. Originality/value – The authors synthesize the empirical BSC literature and derive a future research agenda.

Seasonal Poa annua L. Seedling Emergence Patterns in Maryland

Crop Science ◽  
2007 ◽  
Vol 47 (2) ◽  
pp. 775-779 ◽  
Author(s):  
John E. Kaminski ◽  
Peter H. Dernoeden
Keyword(s):  
Seedling Emergence ◽  
Poa Annua ◽  
Emergence Patterns

scholarly journals An Overview of Ecosystem Service Studies in a Tropical Biodiversity Hotspot, Sri Lanka: Key Perspectives for Future Research

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 540
Author(s):  
Chaya Sarathchandra ◽  
Yirga Alemu Abebe ◽  
Iresha Lakmali Wijerathne ◽  
Sasith Tharanga Aluthwattha ◽  
Sriyani Wickramasinghe ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Sri Lanka ◽  
Ecosystem Service ◽  
Future Research ◽  
Species Introduction ◽  
Related Research ◽  
Management Actions ◽  
Service Category ◽  
Tropical Biodiversity ◽  
Published Evidence

Tropical island countries are often highly populated and deliver immense ecosystem service benefits. As human wellbeing depends on these ecosystems, proper management is crucial in the resource-rich tropical lands where there is less related research. Though ecosystem service and biodiversity studies are a promising path to inform the ecosystem management for these mostly developing countries, published evidence of using ecosystem service studies in decision making is lacking. The purpose of this study is to provide an overview of ecosystem services and related research in Sri Lanka, examining trends and gaps in how these studies are conceptualized. Out of the considered 220 peer-reviewed articles, the majority of articles (48.2%) were terrestrial and forest related while coastal ecosystems were considered in 33.2% of studies. In most studies, the ecosystem service category studied was provisioning (31.5%) followed by regulatory service (28.7%). Studies investigating and quantifying ecosystem services, pressures on ecosystems, and their management were fewer compared to studies related to biodiversity or species introduction. Moreover, studies investigating the value of ecosystem services and biodiversity to the communities or involvement of stakeholders in the development of management actions regarding the ecosystem services were rare in Sri Lanka, and an intense focus from future studies in these aspects is timely and necessary.

Gender budgeting in public financial management: a literature review and research agenda

2021 ◽  
pp. 002085232110317
Author(s):  
Tobias Polzer ◽  
Isabella M Nolte ◽  
Johann Seiwald
Keyword(s):  
Literature Review ◽  
Financial Management ◽  
Secondary Data ◽  
Analytical Framework ◽  
Political Agenda ◽  
Future Research ◽  
Ex Post ◽  
Ex Ante ◽  
Need To Evaluate ◽  
Gender Budgeting

Gender budgeting calls for including a gender perspective at all levels of governmental budgetary processes. While the literature on gender budgeting is interdisciplinary and covers a wide geographical range, it remains fragmented. This study uses a literature review to examine the current discourse on gender budgeting and to elicit avenues for future research. Our review shows that studies focus either on emerging economies, such as India or South Africa, or on countries in Europe. Drawing on an analytical framework, we find that most studies scrutinize the ex ante stages of gender budgeting, whereas less is known about the concurrent and ex post stages. Moreover, because little is known about the outcome and impact of gender budgeting, governments do not know what instruments function best in different settings. Given their ex ante focus, most studies on gender budgeting often either remain descriptive or analyse secondary data. Despite scholars from different disciplines contributing to the field of gender budgeting, several ‘blank spots’ remain, particularly in public sector accounting. Points for practitioners While current gender budgeting projects tend to focus on the ex ante stage of gender budgeting, future practitioner attention needs to focus on the equally important concurrent and ex post stages, which have received less attention thus far. An increasing number of governments worldwide are implementing gender budgeting projects. Governments need to evaluate the outcome and impact of these projects in a timely fashion, aiming at reducing structural inequalities related to gender. Gender budgeting is willingly adopted in times of prosperity and stability or when the scope of projects appears manageable. To avoid negative impacts on their achievements, policy makers need to put gender budgeting on the political agenda and institutionalize it in times of instability and crisis.

scholarly journals Infrastructural nature

2021 ◽  
pp. 030913252199391
Author(s):  
Sara H Nelson ◽  
Patrick Bigger
Keyword(s):  
Political Economy ◽  
Ecosystem Services ◽  
Strategic Management ◽  
Ecosystem Management ◽  
Human Life ◽  
Ecosystem Functions ◽  
Future Research ◽  
The Political ◽  
Conservation Science ◽  
Conservation Investment

The assertion that ‘ecosystems are infrastructure’ is now common in conservation science and ecosystem management. This article interrogates this infrastructural ontology, which we argue underpins diverse practices of conservation investment and ecosystem management focused on the strategic management of ecosystem functions to sustain and secure human life. We trace the genealogies and geographies of infrastructural nature as an ontology and paradigm of investment that coexists (sometimes in tension) with extractivist commodity regimes. We draw links between literatures on the political economy of ecosystem services and infrastructure and highlight three themes that hold promise for future research: labor, territory, and finance.

Henbit (Lamium amplexicaule), Common Chickweed (Stellaria media), Shepherd's-Purse (Capsella bursa-pastoris), and Field Pennycress (Thlaspi arvense): Fecundity, Seed Dispersal, Dormancy, and Emergence

Weed Science ◽  
2014 ◽  
Vol 62 (1) ◽  
pp. 97-106 ◽  
Author(s):  
Erin C. Hill ◽  
Karen A. Renner ◽  
Christy L. Sprague
Keyword(s):  
Seed Production ◽  
Seedling Emergence ◽  
Crop Productivity ◽  
Seed Fate ◽  
Stellaria Media ◽  
Thlaspi Arvense ◽  
Emergence Patterns ◽  
Field Pennycress ◽  
Winter Annuals ◽  
Winter Annual

Winter annual weeds protect the soil from erosion and retain nutrients during the winter; however, they can also act as a host for crop pests and pathogens and impede planting. Increased knowledge of the reproductive biology and the seed fate of winter annuals would be useful to improve management and crop productivity. The objectives of this research were to determine the recruitment biology of shepherd's-purse, henbit, common chickweed, and field pennycress, including seed production, dispersal, dormancy, and seedling emergence, based on growing degree days (GDD). Henbit was the least prolific of the four weeds studied, producing 800 to 40,000 seeds m−2at naturally occurring densities; shepherd's-purse was the most prolific, producing 11,000 to 400,000 seeds m−2with 40 to 230 plants m−2. Fifty percent seed rain occurred for henbit, common chickweed, shepherd's-purse, and field pennycress at 620, 790, 880, and 1300 GDDBase,0C, respectively. Overall, seeds were dormant for all species at the time of dispersal. In 2 of 3 yr, dormancy of later-dispersed common chickweed decreased after 6 mo of storage at natural, fluctuating temperatures in the absence of water. The emergence patterns of the four species followed the Gompertz equation and were indicative of facultative winter annuals. The emergence patterns by rate were similar between henbit and common chickweed and between shepherd's-purse and field pennycress. Seed production, dispersal, dormancy, and seedling emergence were influenced by moisture; therefore, including a precipitation or soil moisture component into a GDD model (such as the use of hydrothermal time) would improve the accuracy of predicting winter annual reproduction, seed fate, and emergence.

scholarly journals Innovation and cross-functional teams

2018 ◽  
Vol 24 (1/2) ◽  
pp. 84-105 ◽  
Author(s):  
Daniel Marasquini Stipp ◽  
Márcio Lopes Pimenta ◽  
Daniel Jugend
Keyword(s):  
Single Case ◽  
Field Research ◽  
Incremental Innovation ◽  
Future Research ◽  
Content Type ◽  
The Public ◽  
Tax Management ◽  
Functional Teams ◽  
Practical Implications

Purpose The aim of this paper is to characterize how innovation may happen through cross-functional teams (CFT) in an organization of the public sector. Design/methodology/approach A case study helped to characterize several behavior patterns, team structures and respective links with generating innovation in internal processes and public answering contexts. Findings The results highlight that formal-temporary teams present a higher capacity to generate incremental innovation in products, whereas permanent-informal teams have a higher capacity to generate innovation in the internal processes and public answering contexts. Research limitations/implications The limitations of this research relate to the fact that this is a single case study, and although it is an important case to examine innovation and CFTs, by its very nature, it is not possible to extend and generalize the obtained data to other organizations. The evaluation of its propositions was merely qualitative, and future research is needed to validate its characteristics. Practical implications Several settings of CFTs are presented, as well as their ability to generate different types of innovation, such as the computerization of documents, petitions and papers, which decreases the time to answer the taxpayer. Moreover, CFTs can help to create products, such as computer programs that can be used not only locally but also in several public organizations related to tax management. Originality/value The field research provides the perceptions of the respondents regarding CFT characteristics that can lead to specific types of innovation, as well as the types of products or services that can be generated by these processes.

scholarly journals Factors affecting Cyperus difformis seed germination and seedling emergence

2013 ◽  
Vol 31 (4) ◽  
pp. 823-832 ◽  
Author(s):  
A. Derakhshan ◽  
J. Gherekhloo
Keyword(s):  
Seed Germination ◽  
Integrated Management ◽  
Germination Rate ◽  
Seedling Emergence ◽  
Management Strategies ◽  
Soil Surface ◽  
Weed Species ◽  
Factors Affecting ◽  
Cyperus Difformis ◽  
Emergence Patterns

Specific knowledge about the dormancy, germination, and emergence patterns of weed species aids the development of integrated management strategies. Laboratory studies were conducted to determine the effect of several environmental factors on seed germination and seedling emergence of Cyperus difformis. Germination of freshly harvested seeds was inhibited by darkness; however, when seeds were subsequently transferred to complete light they germinated readily. Our results showed that 2 wk of cold stratification overcome the light requirement for germination. Seeds of C. difformis were able to germinate over a broad range of temperatures (25/15, 30/20, 35/25, and 40/30 ºC day/night). The response of germination rate to temperature was described as a non-linear function. Based on model outputs, the base, the optimum and the ceiling temperatures were estimated as 14.81, 37.72 and 45 ºC, respectively. A temperature of 120 ºC for a 5 min was required to inhibit 50% of maximum germination. The osmotic potential and salinity required for 50% inhibition of maximum germination were -0.47 MPa and 135.57 mM, respectively. High percentage of seed germination (89%) was observed at pH=6 and decreased to 12% at alkaline medium (pH 9) pH. Seeds sown on the soil surface gave the greatest percentage of seedling emergence, and no seedlings emerged from seeds buried in soil at depths of 1 cm.

Ambiguity in public sector performance measurement: a systematic literature review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chiara Oppi ◽  
Cristina Campanale ◽  
Lino Cinquini
Keyword(s):  
Public Sector ◽  
Literature Review ◽  
Performance Measurement ◽  
Systematic Literature Review ◽  
Field Research ◽  
Future Research ◽  
Academic Journal ◽  
Content Type ◽  
The Public ◽  
Study Results

PurposeThis paper presents a systematic literature review aiming at analysing how research has addressed performance measurement systems’ (PMSs) ambiguities in the public sector. This paper embraces the ambiguity perspective that PMSs in public sector coexist with and cope with existing ambiguities.Design/methodology/approachThe authors conducted a literature review in Scopus and ScienceDirect, considering articles published since 1985, and the authors selected articles published in the journals included in the Association of Business Schools' Academic Journal Guide (Chartered ABS, 2018). Of the 1,278 abstracts that matched the study’s search criteria, the authors selected 131 articles for full reading and 37 articles for the final discussion.FindingsThe study's key findings concern the elements of ambiguity in PMSs discussed in the literature. The study’s results suggest that ambiguity is still a relevant problem in performance measurement, as a problem that is impossible to be solved and therefore needs to be better understood by researchers and public managers. The analysis allows us to summarize the antecedents and consequences of ambiguity in the public sector.Research limitations/implicationsThe key findings of the study concern the main sources of ambiguity in PMSs discussed in the literature, their antecedents and their consequences. The study results suggest that ambiguity exists in performance measurement and that is an issue to be handled with various strategies that can be implemented by managers and employees.Practical implicationsManagers and researchers may benefit from this research as it may represent a guideline to understand ambiguities in their organizations or in field research. Researchers may also benefit from a summary list of the key issues that have been analysed in the empirical cases provided by this research. Social implicationsThis research may provide insights to limit ambiguity and thus contribute to improve performance measurement in the public sector.Originality/valueThis research presents a comprehensive review on the topic. It provides insight that suggests what future research should attend to in helping to interpret ambiguity, considering also what should be done to influence ambiguity.

Control of flexible manipulators: A survey

Robotica ◽  
2004 ◽  
Vol 22 (5) ◽  
pp. 533-545 ◽  
Author(s):  
M. Benosman ◽  
G. Le Vey
Keyword(s):  
Linear Models ◽  
Control Strategies ◽  
Research Area ◽  
Future Research ◽  
Complex Nature ◽  
Open Problems ◽  
Complex Models ◽  
The Many ◽  
The One ◽  
Flexible Arms

A survey of the field of control for flexible multi-link robots is presented. This research area has drawn great attention during the last two decades, and seems to be somewhat less “attractive” now, due to the many satisfactory results already obtained, but also because of the complex nature of the remaining open problems. Thus it seems that the time has come to try to deliver a sort of “state of the art” on this subject, although an exhaustive one is out of scope here, because of the great amount of publications. Instead, we survey the most salient progresses – in our opinion – approximately during the last decade, that are representative of the essential different ideas in the field. We proceed along with the exposition of material coming from about 119 included references. We do not pretend to deeply present each of the methods quoted hereafter; however, our goal is to briefly introduce most of the existing methods and to refer the interested reader to more detailed presentations for each scheme. To begin with, a now well-established classification of the flexible arms control goals is given. It is followed by a presentation of different control strategies, indicating in each case whether the approach deals with the one-link case, which can be successfully treated via linear models, or with the multi-link case which necessitates nonlinear, more complex, models. Some possible issues for future research are given in conclusion.

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