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1
Loebach, Christopher A., and Roger C. Anderson. "Measuring short distance dispersal of Alliaria petiolata and determining potential long distance dispersal mechanisms." PeerJ 6 (March 15, 2018): e4477. http://dx.doi.org/10.7717/peerj.4477.
Повний текст джерелаАнотація:
Introduction Alliaria petiolata, an herbaceous plant, has invaded woodlands in North America. Its ecology has been thoroughly studied, but an overlooked aspect of its biology is seed dispersal distances and mechanisms. We measured seed dispersal distances in the field and tested if epizoochory is a potential mechanism for long-distance seed dispersal. Methods Dispersal distances were measured by placing seed traps in a sector design around three seed point sources, which consisted of 15 second-year plants transplanted within a 0.25 m radius circle. Traps were placed at intervals ranging from 0.25–3.25 m from the point source. Traps remained in the field until a majority of seeds were dispersed. Eight probability density functions were fitted to seed trap counts via maximum likelihood. Epizoochory was tested as a potential seed dispersal mechanism for A. petiolata through a combination of field and laboratory experiments. To test if small mammals transport A. petiolata seeds in their fur, experimental blocks were placed around dense A. petiolata patches. Each block contained a mammal inclusion treatment (MIT) and control. The MIT consisted of a wood-frame (31 × 61× 31 cm) covered in wire mesh, except for the two 31 × 31 cm ends, placed over a germination tray filled with potting soil. A pan filled with bait was placed in the center of the tray. The control frame (11 × 31 × 61 cm) was placed over a germination tray and completely covered in wire mesh to exclude animal activity. Treatments were in the field for peak seed dispersal. In March, trays were moved to a greenhouse and A. petiolata seedlings were counted and then compared between treatments. To determine if A. petiolata seeds attach to raccoon (Procyon lotor) and white-tailed deer (Odocoileus virginianus) fur, wet and dry seeds were dropped onto wet and dry fur. Furs were rotated 180 degrees and the seeds that remained attached were counted. To measure seed retention, seeds were dropped on furs and rotated as before, then the furs were agitated for one hour. The seeds retained in the fur were counted. Results For the seed dispersal experiment, the 2Dt function provided the best fit and was the most biologically meaningful. It predicted that seed density rapidly declined with distance from the point source. Mean dispersal distance was 0.52 m and 95% of seeds dispersed within 1.14 m. The epizoochory field experiment showed increased mammal activity and A. petiolata seedlings in germination trays of the MIT compared to control. Laboratory studies showed 3–26% of seeds were attached and retained by raccoon and deer fur. Retention significantly increased if either seed or fur were wet (57–98%). Discussion Without animal seed vectors, most seeds fall within a short distance of the seed source; however, long distance dispersal may be accomplished by epizoochory. Our data are consistent with A. petiolata’s widespread distribution and development of dense clusters of the species in invaded areas.
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Zehnder, G. W., and J. T. Trumble. "Insect Control on Celery, Fall, 1983." Insecticide and Acaricide Tests 10, no. 1 (January 1, 1985): 89–90. http://dx.doi.org/10.1093/iat/10.1.89.
Повний текст джерелаАнотація:
Abstract Celery was transplanted on 10 Aug at the Univ. of Calif. South Coast Field Station in Santa Ana, CA. The crop was sprinkle irrigated for 3 wk and drip irrigated thereafter. Experimental plots were 3 beds wide (40-inch centers) by 50 ft long with 1 untreated buffer row between plots. Each bed contained 2 rows of plants 6-8 inches apart. Treatments were replicated 4 times in a randomized complete block design. Insecticides were applied weekly with a tractor-mounted boom sprayer from 25 Aug through 10 Nov, except on 29 Sept when rain precluded treatment. As plant height and foliage density increased, nozzles varied from 1-3 per row and carrier (H2O) increased from 50-100 gal/acre. Hollow cone nozzles incorporated D3 orifice disks, #25 cores, and 50-mesh screens. All treatments except Avermectin included 0.04% spreader-sticker (Leaf Act 40). Evaluation of beet armyworm and black cutworm damage was based on the number of damaged plants found in 10 randomly selected plants/replicate (80/ treatment) from the center 2 rows of each replicate at harvest. When plants reached a suitable height, 4 inches X 8 inches pupal trays were inserted between rows and the no. of leafminer larvae, puparia, and pupae and leafminer parasites collected in trays were counted on 11, 18, 26 Oct and 1 and 8 Nov. Four trays were counted in each replicate.
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Wang, Xiaoshuai, Jiangong Li, Jiegang Wu, Qianying Yi, Xinlei Wang, and Kaiying Wang. "Numerical Simulation of the Placement of Exhaust Fans in a Tunnel-Ventilated Layer House During the Fall." Transactions of the ASABE 64, no. 6 (2021): 1955–66. http://dx.doi.org/10.13031/trans.14657.
Повний текст джерелаАнотація:
HighlightsThe placement and operation of exhaust fans was assessed using CFD simulation.The effective temperature was used to evaluate the indoor thermal environment.The placement and operation of the exhaust fans mainly affected the airflow patterns in the part of the layer house closest to the fans.Abstract. The thermal environment inside a layer house significantly affects the growth, production, and health of the hens. Tunnel ventilation systems have been widely applied to control the indoor climate and air quality for large-scale poultry facilities around the world. Generally, only a few of the exhaust fans operate during mild seasons (spring and fall) in a tunnel-ventilated layer house depending on the outside air temperature. The decision about which exhaust fans to turn on affects the indoor airflow pattern and temperature distribution. However, little research has been reported that investigated the effects of the locations of exhaust fans on ventilation performance. In this study, a computational fluid dynamics (CFD) model was built and validated using field-measured data. The CFD model was then used to evaluate different ventilation strategies (combinations of exhaust fans) in a typical tunnel-ventilated layer house during the fall. The effective temperature was used to assess the performance of different ventilation strategies. Results showed that the locations of the exhaust fans significantly affected the indoor thermal environment, especially in the part of the house closest to the fans, because different locations of operating fans can generate different airflow patterns and affect the airflow through the animal-occupied zone. Based on the simulations, we conclude that the placement and operation of the exhaust fans can be optimized. Turning on the fans that are lower to the ground or near the sidewalls will result in more air bypassing the animal-occupied zones. Our results can help select the best ventilation strategy during the spring and fall in layer houses with tunnel ventilation systems. Keywords: Airflow distribution, Effective temperature distribution, Indoor thermal environments, Ventilation strategy.
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Simpkins, Robert J. "The Cadences of Rails." Transfers 10, no. 2-3 (December 1, 2020): 212–29. http://dx.doi.org/10.3167/trans.2020.1002315.
Повний текст джерелаАнотація:
Abstract This article explores how urban space produced by the Japanese railway system is appropriated by people for common use in Tōkyō. Drawing from ethnographic research among musicians at a central train station, I explore how individuals enmeshed within the schedules of the commuter network negotiate mobilities that fall outside the purview of railway urbanism. Station tsūro are passageways monitored by rail staff and local authorities, protected by traffic and railway commerce laws, and influenced by competing pressures from the overburdened network and local neighborhoods. Musicians sensitive to these shifting relationships identify leeway within, performing in ways that open tsūro up, producing temporary, finely balanced spaces of encounter and connection. Through these processes, the commuter system creates rail-specific forms of human relationships.
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White, Douglas W., and Edmund W. Stiles. "Bird dispersal of fruits of species introduced into eastern North America." Canadian Journal of Botany 70, no. 8 (August 1, 1992): 1689–96. http://dx.doi.org/10.1139/b92-208.
Повний текст джерелаАнотація:
We compared bird use of fruits of introduced and native plant species to explore the roles of coevolution, ecological fitting, and chance in shaping seed dispersal interactions. Of 45 bird-dispersed species recorded at three sites in central New Jersey, 15 (33%) were nonnative. In fall samples from seed traps and fecal droppings, introduced species accounted for 0.4–14% of fruit biomass overall and 3 – 30% of the biomass of low-quality fruits. Although absolute fruit use declined from fall to winter, relative use of introduced species increased seasonally to as high as half of winter fruit biomass. Heavy use of non-native fruits appears recent; introductions accounted for only 2% of plant species occurrences in fall and winter records of stomach contents for nine passerine species in New England and mid-Atlantic states between 1881 and 1950. Introduced fruits with fall maturation, low-quality pulp, and high durability now rival native species in fruit diets of birds in late fall and winter. The success of introductions demonstrates coadaptation through ecological fitting of preadapted partners; nevertheless, the predominant use of introduced fruits after peak bird migration suggests that introduced fruits may be less well matched to local dispersal opportunities than native ones. Key words: birds, coevolution, fruits, introductions.
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Chodor, Tom. "The rise and fall and rise of the trans-pacific partnership: 21st century trade politics through a new constitutionalist lens." Review of International Political Economy 26, no. 2 (January 16, 2019): 232–55. http://dx.doi.org/10.1080/09692290.2018.1543720.
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Bhattarai, K. P., and T. N. Mandal. "Comparative study on litter production and nutrient return to soil in Tarai and Hill Sal (Shorea robusta Gaertn.) forests of eastern Nepal." Banko Janakari 28, no. 1 (October 26, 2018): 11–19. http://dx.doi.org/10.3126/banko.v28i1.21450.
Повний текст джерелаАнотація:
Litter production and nutrient return to soil through litter fall is important pathway for the regulation of nutrient cycling and primary production of the forest. Litter fall dynamics is generally influenced by phenology of tree species, seasons and altitude of the forest stand. As most of the information on litter production are from temperate and dry tropical region. A comparative study on litter production and nutrient return were conducted in Terai Sal forest (TSF) and Hill Sal forest (HSF) located in moist tropical region of eastern Nepal. Litter samples were collected from the litter traps (1m × 1m size) placed randomly in the forest. Collection was done at two months interval for one year. Annual litterfall in TSF (8.82 Mg ha-1y-1) was significantly (p < 0.001) higher than in HSF (7.18 Mg ha-1y-1).There was distinct seasonality in litter production. In TSF and HSF, litterfall was maximum in the summer (6.57 Mg ha-1 and 5.05 Mg ha-1, respectively) and minimum in winter season (0.86 Mg ha-1 and 0.72 Mg ha-1, respectively). Amount of nutrient return to forest soil through litter fall (kg ha-1 y-1) was higher in TSF (72.44 N, 6.80 P and 33.23 K) than HSF (54.31 N, 4.84 P and 22.23 K). The difference in litter production between these two forests was influenced by the phenology of dominant tree species, variation in altitude and seasons. Nutrient return through litter fall is a great input of nutrients in soil which is required for production process. Thus, litter constitutes a significant role in forest management.Banko JanakariA Journal of Forestry Information for NepalVol. 28, No. 1, 2018, page: 11-19
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Úrbez-Torres, J. R., M. Battany, L. J. Bettiga, C. Gispert, G. McGourty, J. Roncoroni, R. J. Smith, P. Verdegaal, and W. D. Gubler. "Botryosphaeriaceae Species Spore-Trapping Studies in California Vineyards." Plant Disease 94, no. 6 (June 2010): 717–24. http://dx.doi.org/10.1094/pdis-94-6-0717.
Повний текст джерелаАнотація:
The seasonal abundance of Botryosphaeriaceae spp. spores was studied in California vineyards by using glass microscope slides covered with petroleum jelly placed on grapevine cordons and Burkard volumetric spore traps at seven and two different locations, respectively. Correlation analysis was used to determine which meteorological variables (precipitation, relative humidity, temperature, and wind speed) influenced Botryosphaeriaceae spp. spore release. Among all variables, regression analysis resulted in a strong relationship between spore release and precipitation. Additionally, a positive relationship between irrigation and spore release was also observed in the Riverside County vineyard. During the study period, spore discharge of Botryosphaeriaceae spp. occurred from the first fall rain through the last spring rains, coinciding with September to April. However, based on the results obtained from the spore traps, most spores (over 60%) were trapped following rain events during the winter months of December, January, and February, which coincides with the grapevine pruning season. Botryosphaeriaceae spp. spore release was much lower in fall and early spring (22%) and very few or no spores were trapped in late spring and summer (3%). This work suggests that a delay of pruning time in California may be warranted to reduce grapevine infection because the current timing coincides with the greatest period of spore discharge.
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Arbour, Marie-Eve. "Volkswagen: Bugs and Outlooks in Car Industry Regulation, Governance and Liability." European Journal of Risk Regulation 7, no. 1 (March 2016): 4–10. http://dx.doi.org/10.1017/s1867299x00005316.
Повний текст джерелаАнотація:
The scandal involving the Volkswagen group broke out last Fall, at the dawn of the very delicate UN Conference on Climate Change (COP21) held in Paris, and the posting of an unofficial version of the Comprehensive Economic and Trade Agreement (CETA). This so, just when a leaked version Transatlantic Trade and Investment Partnership (TTIP) ran through the veins of the Internet and the Trans-Pacific Partnership (TPP) was just about to be signed in New Zealand, fostering market integration by pushing further national treatment and mutual recognition, against the backdrop -albeit one small step at a time- of an increasing demand for environmental protection through the setting, among other regulation tools, of emission thresholds.
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James, Trevor K., Michael R. Trolove, and Claire A. Dowsett. "Roadside mowing spreads yellow bristle grass (Setaria pumila) seeds further than by natural dispersal." New Zealand Plant Protection 72 (July 22, 2019): 153–57. http://dx.doi.org/10.30843/nzpp.2019.72.246.
Повний текст джерелаАнотація:
Yellow bristle grass is a highly invasive annual C4 pasture weed that has spread rapidly through many New Zealand dairying regions via seed dispersal. Seven trials were conducted on roadsides infested with yellow bristle grass to evaluate natural and mower-assisted dispersal. To trap seeds, yellow sticky traps were laid out at various intervals both perpendicular to and parallel to the road. Traps were in place for 24 h in the four natural dispersal trials but only for the event in the mowing trials. Seeds on the retrieved traps were counted and the seeds caught in the mower estimated. For natural dispersal, 90% of seeds fell within 0.5 m. When mown, 90% of the seeds fell within 2 metres in the direction of mowing and 80% within 20 cm in the perpendicular direction. More importantly, a small percentage of dispersed seeds were caught in the mower and presumably could subsequently fall off anywhere. Mowing mature yellow bristle grass on the roadside will result in accelerating seed dispersal along the roadside for many metres and potentially many kilometres.
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Rocha, Carlos Frederico Duarte, Helena Godoy Bergallo, Carla Fabiane Vera y Conde, Emerson Brum Bittencourt, and Hilda de Carvalho Santos. "Richness, abundance, and mass in snake assemblages from two Atlantic Rainforest sites (Ilha do Cardoso, São Paulo) with differences in environmental productivity." Biota Neotropica 8, no. 3 (September 2008): 117–22. http://dx.doi.org/10.1590/s1676-06032008000300011.
Повний текст джерелаАнотація:
We analyzed richness, composition and mass of snakes in two sites in the Atlantic forest of Ilha do Cardoso (25º 03' S and 47º 53' W), an island (22,500 ha), Cananéia municipality, São Paulo State, Brazil. A monthly index of arthropod availability (in mm³) was estimated in each site through capture rates in pit-fall traps. Fallen fruits were collected along trails in the study sites (mass of fruit gave an index of fruit availability) and small mammals were sampled in grids with 120 traps which covered the lowland (5.2 ha) and in the slope forests (3.6ha). The abundance and mass of small mammals were standardized for the size of each sampled area (in g.ha-1). To sample snakes we established 20 pit-fall traps in each area and performed monthly transects in four consecutive days (totaling 1000 m long) along trails in the study sites. Snakes found were measured, weighted marked and released. Abundance and total mass of snakes were standardized by the size of each area. The areas differed consistently in in the productivity of arthropods, fruits and small mammals, and also in richness, composition and total mass of snakes. We found 36 individuals (total mass = 9884 g) of 12 snake species belonging to three Families (Colubridae, Elapidae and Viperidae) in the lowland forest, whereas in the slope forest we sampled only 9 individuals of 2 species (total mass = 1820 g). Our results suggest that the area of lowland forest, showing higher productivity of arthropods, fruits and small mammals, maintains a snake community with a higher richness, diversity and biomass than its slope forest counterpart.
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Watson, Jonathan Adam, and Ying Zhang. "A Retrospective Pre-Post Survey to Analyze Course Revisions, Perceived Learning, and Learning Outcomes in an Agricultural Structures Course." Transactions of the ASABE 64, no. 5 (2021): 1415–23. http://dx.doi.org/10.13031/trans.14578.
Повний текст джерелаАнотація:
HighlightsThe RASE pedagogical model for integrating technology into an upper-division structures course proved effective.A retrospective pre-test/post-test was used to measure changes in students’ perceived competencies.Students indicated increases in perceived knowledge, skills, and attitudes following several course modifications.Students felt technology, experiential learning, and formative and summative assessment improved their learning.Abstract. In early 2019, instructors in the Agricultural Operations Management (AOM) program in the Department of Agricultural and Biological Engineering at the University of Florida developed a retrospective pre-test/post-test survey instrument to measure changes in perceived knowledge, skills, and attitudes (KSA) for students enrolled in AOM4642: Environmental Systems for Agricultural Structures during the fall 2019 semester. The course trains students to understand the components of the environment, the impact of those components on building usage, and how to control the environmental variables of buildings used to house agricultural products (e.g., livestock and horticultural) for more efficient production, processing, and storage. The course stresses a hands-on approach through experiential learning opportunities, and it challenges students to solve problems using critical thinking and application of conceptual principles. The course recently underwent significant revisions following the RASE pedagogical model to create student-centered curricular experiences and link learning objectives with assessments, outcomes, and evaluation. Thirty-one AOM students enrolled in the 16-week course completed the survey. After the course, the students retroactively (i.e., “before and after” instruction) rated their perceived learning. Changes in pre- and post-instruction responses were compared using measures of central tendency and correlations, and statistical significance (p-values) was reported. Constructs measuring KSA items were created using collapsed variables and tested for internal consistency and scale reliability against a threshold reliability coefficient of 0.70. The goal of this study was to assess the effectiveness of the RASE pedagogical model on student-perceived learning with respect to changes in knowledge, skills, and attitudes in an agricultural structures course. The specific objectives of this study were to: (1) measure changes in students’ perceived knowledge, skills, and attitudes, (2) evaluate student sentiment toward the course materials and activities, and (3) solicit feedback from the students on ways to improve the course. Results of the survey indicated significant increases in students’ perceived learning with respect to KSA. In addition, students commented on the effectiveness of several instructional activities (e.g., labs, field trips), indicating that those activities enhanced their experiences, but they also noted that shorter, more frequent homework would help with retention. Keywords: Assessment and evaluation, Construct reliability analysis, Instructional improvement, Perceived learning, RASE pedagogical model, Retrospective pre-test and post-test design, Student perceptions.
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Cortus, Erin L., Brian P. Hetchler, Mindy J. Spiehs, and Warren C. Rusche. "Environmental Conditions and Gas Concentrations in Deep-Pit Finishing Cattle Facilities: A Descriptive Study." Transactions of the ASABE 64, no. 1 (2021): 31–48. http://dx.doi.org/10.13031/trans.14040.
Повний текст джерелаАнотація:
HighlightsTemperature and air movement in the naturally ventilated barns correlated to ambient conditions.Manure N-P-K values related to solids distribution in the manure storage.Ammonia and combined sulfur concentrations increased with closer proximity to the manure surface.Influences of manure properties, airflow conditions, barn design, and management were evident for gas concentrations.Abstract. There is a lack of data to describe the range of environmental and air quality conditions in beef cattle confinement buildings with deep-pit manure storage. The objective of this article is to describe the environmental conditions, manure nutrient concentrations, and aerial gas concentrations for three deep-pit manure storage finishing beef cattle facilities and varying weather conditions. Measurements were collected from three barns finishing beef cattle with deep pits in Minnesota on three sampling days per barn in summer, fall, and spring weather conditions. The air temperatures throughout the barns closely mirrored the ambient temperature conditions, although significantly lower temperatures were sometimes evident at the manure surface or in the inlet opening. However, the manure and floor surfaces had 2°C and 5°C temperature increases over ambient temperatures. Air speeds through the barn openings were generally 40% of the ambient wind speed; at animal level, the average air speed was 1 to 3 m s-1. Manure nutrient distributions were not consistent between the surface and agitated (whole pit) samples, and this was likely due in part to solids distribution in the storage. Total nitrogen levels ranged from 4.5 to 6.7 g L-1, and ammonium-N was 50% to 65% of total N in agitated whole-pit samples. Phosphate and potassium oxide levels ranged from 2.8 to 4.2 g L-1 and from 3.7 to 4.5 g L-1, respectively. Aerial ammonia and combined sulfur concentrations varied by location within a barn, pen, and season. Ammonia and combined sulfur increased with proximity to the manure surface. Higher ammonia and combined sulfur concentrations at manure level and floor level for one of the three barns may have related to water quality and/or feed composition and resulting manure nutrients, in addition to warmer temperatures. At floor level, the greatest average ammonia concentration was 8.5 ppm, and 3.9 ppm at nose level. Maximum combined sulfur levels were a maximum of 270 ppb at floor level in summer conditions in one of the barns, while 52 ppb was the maximum average during spring conditions. Carbon dioxide levels also varied by location within a barn, pen, and season and were related in part to the presence of cattle in the pen. This project is the first to quantify air quality in slatted-floor cattle barns and contributes to a body of knowledge that can be used to develop process-based models for estimating air emissions from cattle facilities. Keywords: Airflow, Ammonia, Beef cattle, Confinement, Hydrogenslfide, Manure characteristics, Temperature.
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Zeitoun, Mark, and Jeroen Warner. "Hydro-hegemony – a framework for analysis of trans-boundary water conflicts." Water Policy 8, no. 5 (October 1, 2006): 435–60. http://dx.doi.org/10.2166/wp.2006.054.
Повний текст джерелаАнотація:
The increasing structural and physical scarcity of water across the globe calls for a deeper understanding of trans-boundary water conflicts. Conventional analysis tends to downplay the role that power asymmetry plays in creating and maintaining situations of water conflict that fall short of the violent form of war and to treat as unproblematic situations of cooperation occurring in an asymmetrical context. The conceptual Framework of Hydro-Hegemony presented herein attempts to give these two features – power and varying intensities of conflict – their respective place in the perennial and deeply political question: who gets how much water, how and why? Hydro-hegemony is hegemony at the river basin level, achieved through water resource control strategies such as resource capture, integration and containment. The strategies are executed through an array of tactics (e.g. coercion-pressure, treaties, knowledge construction, etc.) that are enabled by the exploitation of existing power asymmetries within a weak international institutional context. Political processes outside the water sector configure basin-wide hydro-political relations in a form ranging from the benefits derived from cooperation under hegemonic leadership to the inequitable aspects of domination. The outcome of the competition in terms of control over the resource is determined through the form of hydro-hegemony established, typically in favour of the most powerful actor. The Framework of Hydro-hegemony is applied to the Nile, Jordan and Tigris and Euphrates river basins, where it is found that current hydro-hegemonic configurations tend towards the dominative form.. There is evidence in each case of power asymmetries influencing an inequitable outcome – at the expense of lingering, low-intensity conflicts. It is proposed that the framework provides an analytical paradigm useful for examining the options of such powerful or hegemonized riparians and how they might move away from domination towards cooperation.
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Febtriko, Anip, and Wita Yulianti. "Application Of The Concept And Monitoring Of Robot Line Follwer As a Prototype Of Pekanbaru Trans Metro Bus Towards The Revolution Industry 4.0 (Penerapan Konsep Dan Monitoring Robot Line Follwer Sebagai Prototipe Bus Trans Metro Pekanbaru Menuju Era Revo." Jurnal KomtekInfo 6, no. 2 (November 19, 2019): 117–26. http://dx.doi.org/10.35134/komtekinfo.v6i2.50.
Повний текст джерелаАнотація:
Public transportation is a major part of developing an advanced and modern city. Progress in public transportation is needed to be planned and realized to deal with the development of the city together with population and economic growth. The use of the Trans Metro Pekanbaru bus transportation is not in line with the development and progress of the City of Pekanbaru, which wants to be a smart city, where the role of the Internet of Things (IoT) needs to be realized in building smart cities and currently the use of the Trans Metro Pekanbaru bus in Pekanbaru is still becoming a problem. it needs to be resolved like the Trans Metro Pekanbaru bus lane which still uses a shared lane which causes congestion and lack of good trafic regulations. Trans Metro Pekanbaru bus transportation is still weak in terms of arrival and departure times. Trans metro Pekanbaru has not yet been integrated in a system that can be monitored centrally through the application of an application system based on the Global Positioning System (GPS). To overcome this problem, it is necessary to have the Trans Metro Pekanbaru bus transportation in the form of a prototype line follower robot which is a solution to overcome this problem. The purpose of this research is to make the line follower robot as a trans-metro silmulation bus for Pekanbaru become a smart city that is able to serve and facilitate the public's need for public transportation towards the industrial revolution 4.0. Line follower robot is a robot that works by following a line in the form of a road such as a traf ic lane, where the robot works using photodiode sensors and ultrasonic sensors as proximity sensors so that it stops automatically at every stop or place where passengers rise and fall. Line follower robots are automatically controlled so programming code and fuzzy algorithms are needed. Line follower robots are also equipped with Closed Circuit Television (CCTV) to determine passenger conditions.
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Mwanawina, Ilyayambwa. "Regional Integration and Pacta Sunt Servanda: Reflections on South African Trans-Border Higher Education Policies." Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad 19 (December 12, 2016): 1. http://dx.doi.org/10.17159/1727-3781/2016/v19i0a1662.
Повний текст джерелаАнотація:
The underpinning essence of being part of a regional organisation such as the Southern African Development Community (SADC) is to achieve development through integration. Regional integration thus becomes the bedrock from which the treaties governing SADC and its member states are to be interpreted. The SADC Treaty and its various protocols articulate that members should eliminate obstacles to the free movement of people, goods and services. This should include the progressive reduction of immigration formalities in order to facilitate the freer movement of students and staff for the specific purposes of study, teaching, research and any other pursuits relating to education and training. Relying on international law principles such as pacta sunt servanda, this article establishes that though South Africa has made much progress in meeting most of the SADC obligations relating to migration and education, there are still grey policy areas that fall short of SADC standards and regional commitments. It also appraises the role of the SADC Council of Ministers, the Parliamentary Forum, the Tribunal and the National Committees in addressing these areas.
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Deguara, Angele. "Secularisation and intimate relationships in a Catholic community: Is Malta a resistant niche?" Social Compass 67, no. 3 (June 11, 2020): 372–88. http://dx.doi.org/10.1177/0037768620920173.
Повний текст джерелаАнотація:
This study explores secularisation in a traditionally Catholic community through the analysis of intimate relationships which fall outside Catholic morality. It gives an indication of how individuals in contemporary society perceive Church teachings on sexuality in terms of the relationship choices they make. The research draws upon 2 years of fieldwork carried out with Drachma LGBTI, a space where lesbian, gay, bisexual, trans, and intersex (LGBTI) people of faith may explore and deepen their spirituality. I also conducted 35 in-depth interviews with LGBT and non-LGBT individuals whose lifestyle runs counter to official Church teachings on sexuality, despite their Catholic faith that is, who are in a same-sex relationship or else divorced, cohabiting or in a civil marriage. The study revealed that while informants may disregard Church teachings on matters of sexuality, their reconstructed sexual morality is still embedded within a Catholic framework.
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Llamas, Veronica G. "Between transgression and tokenism: The simultaneous inclusion and exclusion of trans and gender non-conforming bodies in fashion." Fashion, Style & Popular Culture 00, no. 00 (April 12, 2022): 1–22. http://dx.doi.org/10.1386/fspc_00128_1.
Повний текст джерелаАнотація:
The fashion industry materially and symbolically contributes to our understandings of the gender binary. Its configuration of what constitutes crossing gender boundaries has also shifted through the years, including proposals of androgyny, unisex and gender-neutral collections. More recently, some of these concepts have been repackaged under the language of gender identity, as brands realize that younger customers are more likely than ever to fall under the gender non-conforming umbrella. Conflating an aesthetic preference for ‘gender fluidity’ with the language of gender identity can seem like a form of commodification when examining the barriers encountered by trans and non-binary individuals who work in the fashion industry. While the discourse of diversity is on the rise, some of the LGBTIQ inclusion in the industry stops at a tokenistic image level that does not destabilize the problematic structures beneath. Nevertheless, some designers do centre LGBTIQ inclusion and gender fluidity in their practice; but without a careful examination of privilege and access to resources, they can still reproduce exclusive and exploitative practices ingrained in the industry. This article will explore the above issues through a discursive analytical approach of online articles of the magazines Dazed and i-D, published between 2015 and 2020.
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Nemtinov, Kirill, Alexsey Eruslanov, and Yulia Nemtinova. "Engineering design of a grain silo and a bucket elevator for a combined unit for hopper preparation and seeding of grain crops." E3S Web of Conferences 126 (2019): 00003. http://dx.doi.org/10.1051/e3sconf/201912600003.
Повний текст джерелаАнотація:
In this paper, we present the results of engineering design of components of a grain hopper and a bucket elevator for a combined unit for soil preparation and sowing of grain crops. The grain hopper has compartments for seeds and fertilizers. A coil-type metering device is also separated for seeds and fertilizers. The drive of the metering device for seeds and fertilizers is done by the rear wheels of the rolling device through a variator, which also serves to adjust seeds supply. On the same shaft with the metering device there is a sprocket, which transmits rotation moment to the bucket elevator through a chain of PR type. Due to special design characteristics of the grain hopper shape, seeds enter the coil type metering device by gravity. A similar operation is done for fertilizers. Portions of fertilizers and seeds fall into a small tank, joint for grain and fertilizers, from where the elevator's buckets deliver them to the distribution device. Seeds and fertilizer fall on the distributing device along the tray and then on rotating cone with blades, which uniformly distribute grain and fertilizers to all drill tubes. The developed units were organically included in the design of the entire combined unit. The obtained results allowed us to distinguish the following advantages of the developed designs of the hopper and the bucket elevator: a single metering unit for all sowing machines; easy access to the main units and mechanisms and their maintainability; ease of off-season maintenance; use of a large number of typical domestically produced units and mechanisms.
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Ebraheim, Nabil A., Hossein Elgafy, Fady F. Sabry, Mouhanad Freih, and Iman S. Abou-Chakra. "Sinus Tarsi Approach with Trans-articular Fixation for Displaced Intra-articular Fractures of the Calcaneus." Foot & Ankle International 21, no. 2 (February 2000): 105–13. http://dx.doi.org/10.1177/107110070002100203.
Повний текст джерелаАнотація:
The charts and radiographs of 99 patients with 106 intraarticular fractures of the calcaneus were retrospectively reviewed. There were 75 men and 24 women. The average age was forty-two (range, 17 to 81). Fifty-seven of the fractures were left and 49 were right. The mechanism of injury was a fall from a height in 69 patients and motor vehicle accident in 30 patients. According to Sanders classification, seventy-one cases (67%) had type II fractures, 25 cases (23.6%) had type III, and ten cases (9.4%) had type IV. All the patients had operative management through a limited sinus tarsi approach with minimal fixation of the fracture with one or several pins. One of the pins was usually applied from the talus to the calcaneus through the fracture after reduction of the posterior facet. Nine cases (8.5%) developed postoperative infection, four cases (3.8%) had superficial wound infection, four cases (3.8%) had pin tract infection and one case (0.9%) had osteomylitis. Our follow-up at an average of 29 months (range, 12 to 84 months) showed that the American Orthopedic Foot and Ankle Society, Ankle-Hindfoot Score for the all group was 77.6 (range, 31–91). Forty-one fractures (38.8%) were graded excellent, 39 fractures (36.7%) good, 14 fractures (13.2%) fair, and 12 fractures (11.3%) were failures. Although radiological degenerative changes in the subtalar joint were seen in 41 cases (38.7%), only six cases (5.6%) required subsequent subtalar fusion. The authors conclude that the operative method used in the current study which followed the principle of minimal soft tissue damage and minimal internal fixation may be a good option for management of calcaneus fractures.
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CARSKY, R. J., and M. A. TOUKOUROU. "CASSAVA LEAF LITTER ESTIMATION IN ON-FARM TRIALS." Experimental Agriculture 40, no. 3 (June 24, 2004): 315–26. http://dx.doi.org/10.1017/s0014479703001625.
Повний текст джерелаАнотація:
Cassava (Manihot esculenta) returns organic matter and nutrients to the soil through leaf litter and these amounts need to be quantified to help understand and design sustainable cropping systems. Our objectives were to estimate dry matter and nutrient contents in cassava leaf litter and to derive relationships between litter fall and easily measurable cassava yield components. Litter traps (1 m2) were placed in farmers' fields for monthly monitoring during a three year period. Maximum monthly leaf litter production ranged from 0.5 to 1.0 t ha−1, and occurred at the end of the first rainy season and at the onset of the next rainy season. In the first year, the mean dry matter of leaves collected during 12 months of growth was 3.4 t ha−1 for the unamended treatment, and 4.1 t ha−1 when N-P-K fertilizer was applied. The totals were 2.4 and 3.0 t ha−1 in 2000–2001 and 1.6 and 2.5 t ha−1 in 2001–2002, respectively. Annual differences were apparently related to rainfall. The relationship with fresh root yield was best described using one slope and yearly intercepts giving an r2 of 0.63. This relationship can be exploited for estimating litter dry matter in agronomic experiments when rough estimates are sufficient, keeping in mind that the relationship may not be the same for cultivars of differing architecture. Otherwise, the use of litter traps gives the best estimate of annual litter production.
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Storey, J. Benton. "The Use of Interactive Television in Expanding the Teaching Mission of the Land-grant University." HortScience 32, no. 3 (June 1997): 527D—527. http://dx.doi.org/10.21273/hortsci.32.3.527d.
Повний текст джерелаАнотація:
The Trans Texas Video Conference Network (TTVN) has been linked to all Texas A&M Univ. campuses and most of the Regional Research and Extension Centers. The College of Agriculture and Life Sciences has funded an aggressive project of establishing TTVN class rooms in many departments across the College Station campus, including The Horticultural Science Dept. in 1997. The first two Hort courses taught were HORT 422 Citrus and Subtropical Fruits in Fall 1996 and HORT 418 Nut Culture in Spring 1997. This extended the class room 400 miles south to Weslaco, 300 miles north to Texarkana and Dallas, and 700 miles west to El Paso. Students at each site had video and audio interaction with the professor and with each other. Advantages included the availability of college credit courses to areas where this subject matter did not previously exist, which helps fulfill the Land-grant University Mission. Quality was maintained through lecture and lab outlines on Aggie Horticulture, the department's Web home page, term papers written to ASHS serial publicationspecifications, and rigorous examinations monitored by site facilitators. Lecture presentations were presented via Power Point, which took about twice as long to prepare than traditional overhead transparencies. Administrative problems remain, but will be solved when the requested Distance Education Registration Category is initiated so that subvention credit can be shared. The lecture portion of the graduate course, HORT 601 Nutrition of Horticultural Plants, will be taught in the fall semester 1997 at eight sites throughout the state.
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Marco, Frank, and Septia Winduwati. "Aktivitas Komunikasi Sanggar Seroja dalam Mengedukasi Transpuan di Jakarta." Koneksi 6, no. 1 (March 2, 2022): 205. http://dx.doi.org/10.24912/kn.v6i1.15673.
Повний текст джерелаАнотація:
Humans are social beings who need the help of other humans and every human being has the right to determine his own way of life. However, this is what thedoes not feel, lesbian gay bisexual transgender (LGBT) community especially the transwoman community, such as in the right to health, work and many more so that they have to live a different life because their choices are different from most people. Many of them drop out of school, do not work and fall into the world of crime, this can be an example of the lack of attention of the trans women community and is one of the main reasons for the establishment of Sanggar Seroja to educate and empower trans women in Jakarta. Sanggar Seroja tries to educate transgender women through art activities and activities of Micro, Small and Medium Enterprises (MSMEs). With the establishment of Sanggar Seroja, they hope that trans women will get the same attention and rights as other people, and they want to instill an attitude of independent trans women who are proud of themselves.Manusia adalah makluk sosial yang memerlukan bantuan manusia lain dan setiap manusia memiliki hak untuk menentukan jalan hidupnya sendiri. Namun inilah yang tidak dirasakan oleh komunitas lesbian gay bisexsual transgender (LGBT) terutama komunitas transpuan seperti dalam hak kesehatan, pekerjaan dan masih banyak lagi sehingga mereka harus menjalani hidup yang berbeda karena pilihannya yang berbeda dari kebanyakan orang. Banyak dari mereka yang putus sekolah, tidak bekerja dan terjerumus ke dalam dunia kriminalitas, hal ini dapat menjadi salah satu contoh kurangnya perhatian komunitas transpuan serta merupakan salah satu alasan utama didirikannya Sanggar Seroja untuk mengedukasi serta memberdayakan transpuan di Jakarta. Sanggar Seroja berusaha mengedukasi transpuan melalui kegiatan-kegiatan kesenian dan kegiatan Usaha Mikro Kecil Menengah (UMKM). Dengan didirikannya Sanggar Seroja, mereka berharap agar transpuan mendapatkan perhatian dan hak yang sama dengan orang lain, serta ingin menanamkan sikap transpuan yang independen dan bangga dengan dirinya sendiri. Pada penelitian ini, peneliti menggunakan metode penelitian kualitiatif deskriptif dengan menggunakan pendekatan studi kasus. Hasil pada penelitian ini adalah aktivitas komunikasi yang dibentuk oleh Sanggar Seroja komunikasi yang edukatif, saling terhubung dan juga Sanggar Seroja mengadakan kegiatan-kegiatan yang berguna untuk mengembangkan potensi dalam diri transpuan.
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Zhiltsov, S. S., and E. M. Savicheva. "Regional Security in the South Caucasus: The Energy Factor." Post-Soviet Issues 8, no. 3 (November 30, 2021): 331–40. http://dx.doi.org/10.24975/2313-8920-2021-8-3-331-340.
Повний текст джерелаАнотація:
A key factor that influenced regional security in the South Caucasus was the hostilities between Azerbaijan and Armenia in the fall of 2020. Those events have changed the balance of power in the region. The efforts of Azerbaijan, which relied on political and military support from Turkey, led to Baku’s control over part of the territory of Nagorno-Karabakh. The hostilities of the fall of 2020 aggravated the internal political situation in Armenia. Turkey strengthened its position in the region. In addition to solving geopolitical problems and promoting its economic interests in the countries of the South Caucasus, Ankara’s policy was aimed at expanding its presence in the energy sector, including through increased influence on Azerbaijan. The implementation of the “Southern Gas Corridor” project has made Turkey a key “player” in the South Caucasus in the energy sphere. Ankara has gained an opportunity to influence gas supplies to Europe. It also has access to Azerbaijan’s gas streams. In the long run, Turkey hopes to reach hydrocarbon resources on the eastern coast of the Caspian Sea, particularly Turkmen gas. With information and political support from the United States, Turkey has promoted the idea of the Trans-Caspian Gas Pipeline. Thus, Turkey’s policy promoted the development of the East-West Energy Corridor. The Turkish-Azerbaijani-Georgian trilateral format contributed to this. It allowed Ankara to greatly expand its presence in the South Caucasus and to impact the political and economic development of Azerbaijan and Georgia. Overall, however, Ankara’s policy has had a negative impact on regional security and has intensified the competition for influence in the South Caucasus among extra-regional actors.
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Vollono, Giulia. "Exploring Approaches to Italian Early Medieval Archaeology in Post-communist Europe." Ex Novo: Journal of Archaeology 1 (December 31, 2016): 85–96. http://dx.doi.org/10.32028/exnovo.v1i0.400.
Повний текст джерелаАнотація:
The fall of the Berlin Wall and, subsequently, of communism in Europe had profound consequences for the social and political environment of many European countries, including Italy. In this paper I discuss the impact that these, now historical, events and the new socio-political arena that emerged in their aftermath had upon Italian Early Medieval Archaeology from two interconnected perspectives. On the one hand I consider the history of a discipline that, although strongly characterised by a Marxist approach at its birth, appears not to have been subject to significant changes in its theoretical outlook as a consequence. On the other, through a consideration of the changing character of major exhibitions on the Lombard period, I explore the role that archaeology has played in the construction of a trans-national European narrative in a post-communist Europe while maintaining a central role in the negotiation of local identities. The ultimate aim of this paper is to re-evaluate the latest developments in Italian archaeology from a fresh perspective, considering the impact that major contemporary events can have on our perception, interpretation and narration of the past.
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Souter, E., M. Pypaert, and G. Warren. "The Golgi stack reassembles during telophase before arrival of proteins transported from the endoplasmic reticulum." Journal of Cell Biology 122, no. 3 (August 1, 1993): 533–40. http://dx.doi.org/10.1083/jcb.122.3.533.
Повний текст джерелаАнотація:
HeLa cells arrested in prometaphase were pulse-labeled with [35S]methionine and chased in the absence of nocodazole to allow passage through mitosis and into G1. Transport of histocompatibility antigen (HLA) molecules to the medial- and trans-Golgi cisternae was measured by monitoring the resistance to endoglycosidase H and the acquisition of sialic acid residues, respectively. Transport to the plasma membrane was measured using neuraminidase to remove sialic acid residues on surface HLA molecules. The half-time for transport to each of these compartments was about 65-min longer in cells progressing out of mitosis than in G1 cells. This delay was only 5-min longer than the half-time for the fall in histone H1 kinase activity suggesting that inactivation of the mitotic kinase triggers the resumption of protein transport. The half-time for reassembly of the Golgi stack, measured using stereological procedures, was also 65 min, suggesting that both transport and reassembly are triggered at the same time. However, since reassembly was complete within 5 min, whereas HLA took 25 min to reach the medial-cisterna, we can conclude that the Golgi stack has reassembled by the time HLA reaches it.
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Dufour-Pelletier, Samuel, Junior A. Tremblay, Christian Hébert, Thibault Lachat, and Jacques Ibarzabal. "Testing the Effect of Snag and Cavity Supply on Deadwood-Associated Species in a Managed Boreal Forest." Forests 11, no. 4 (April 9, 2020): 424. http://dx.doi.org/10.3390/f11040424.
Повний текст джерелаАнотація:
Standing deadwood is an important attribute of old-growth boreal forests and it provides essential microhabitats for deadwood-associated species. In managed boreal forests, short rotations tend to limit the amount and diversity of standing deadwood. This study evaluates if the anthropogenic supply of deadwood attributes through tree girdling or by providing nest boxes may favor deadwood-associated species. We studied the short-term response of saproxylic beetles, foraging woodpeckers, and secondary cavity users to snag and cavity supply in 50 to 70-year-old black spruce stands. In spring 2015, we girdled 8000 black spruce according to two spatial distributions (uniform and clustered), and we also installed 450 nest boxes of six different sizes at three distances from the forest edge. Using trunk window traps, we captured significantly more beetles in sites with girdled trees than in control sites in both 2015 and 2016. We also recorded a trend of a greater abundance of beetles in clusters of girdled trees than within uniformly distributed girdled trees. Trypodendron lineatum (Oliver) dominated beetle assemblages, representing 88.5% of all species in 2015 and 74.6% in 2016. The number of beetles captured was 7× higher in 2015 than in 2016. In contrast, we observed greater amounts of woodpecker foraging marks in fall 2016 than in either fall 2015 or spring 2016. Woodpeckers foraged significantly more in clusters of girdled trees than within uniformly distributed girdled trees. Woodpeckers’ foraging mark presence was positively associated with the proportion of recent cuts at 1 km around the study sites. Five Boreal Chickadee (Poecile hudsonicus Forster) pairs used nest boxes and occupied smaller box sizes that were located away from the forest edge. Our study showed that structural enrichment can be effective in rapidly attracting deadwood-associated species within managed forest stands.
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Mausel, David L., Robert I. Gara, Dolly Lanfranco, Cecilia Ruiz, Sandra Ide, and Rodrigo Azat. "The introduced bark beetles Hylurgus ligniperda and Hylastes ater (Coleoptera: Scolytidae) in Chile: seasonal flight and effect of Pinus radiata log placement on colonization." Canadian Journal of Forest Research 37, no. 1 (January 1, 2007): 156–69. http://dx.doi.org/10.1139/x06-215.
Повний текст джерелаАнотація:
The seasonal flight of Hylurgus ligniperda (Fabr.) and Hylastes ater (Paykull) and the effect of log placement in Pinus radiata D. Don plantations on colonization by these species in Chile are described. Seasonal flight activity was monitored with α-pinene and ethanol-baited traps at three sites and colonization synchrony with trap logs. In two experiments with individual logs and log decks, data were recorded on adults found under the logs, attacks on the bark surface, and adults beneath the bark of logs in three storage treatments: individual logs and log decks (1) touching the soil; (2) elevated above the soil; and (3) touching other logs (individual logs) or logs separated with spacers (log decks). Each treatment was replicated in a plantation and a clearcut. At San José (region IX) and Peña Blanca (region VIII), H. ligniperda flew primarily in spring and H. ater flew in spring and fall. At Brasil (region VIII), H. ligniperda and H. ater flew primarily in summer through fall. The flight of H. ligniperda was more synchronized with colonization of logs than was that of H. ater. The mean number of attacks was significantly higher on individual logs and log decks stored on the soil than on those elevated above the soil, and significantly higher in the clearcut than in the plantation. Mean numbers of adults beneath the bark did not vary significantly among individual-log treatments, but were significantly lower in the log decks separated by spacers. Logging during nondispersal periods (June–August in regions VIII–X) and storing log decks above the soil could reduce beetle colonization of newly cut logs. With this information, management of recently cut logs (harvesting, transport, and storage operations) could be scheduled and executed so as to reduce the risk of these species being introduced into log-importing countries.
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Engblom, Samuel, and Åsa Odin Ekman. "Expanding the Movement of Natural Persons Through Free Trade Agreements? A Review of CETA, TPP and ChAFTA." International Journal of Comparative Labour Law and Industrial Relations 35, Issue 2 (June 1, 2019): 163–200. http://dx.doi.org/10.54648/ijcl2019009.
Повний текст джерелаАнотація:
Researchers and international institutions have tried to solve a fundamental paradox in the politics of migration. While introducing stricter migration policy stands high on the agenda of many countries, demographic facts suggest that they will need to introduce more extensive labour immigration to avoid labour shortages. Meanwhile, attempts to introduce a legally binding international regime on labour mobility, most ambitiously through Mode 4 of the General Agreement on Trade in Services (GATS) and as requested by developing countries, have had limited success. This article explores one of the political options for resolving this: regulating the movement of natural persons through free trade agreements. It examines three recently concluded free trade agreements (FTAs), the EU–Canada Comprehensive Economic and Trade Agreement (CETA), the China–Australia Free Trade Agreement (ChAFTA) and the Trans-Pacific Partnership (TPP), in an attempt to answer two questions. First, do the signatories commit to more expansive possibilities for labour mobility than through the GATS? Second, what has the political reception of such measures been? While most of the signatories are willing to schedule more far-reaching commitments through FTAs than through the GATS, these commitments typically fall within the realm of existing work permit systems in domestic law. In addition, we find examples of political backlash in countries that have included somewhat more ambitious mobility provisions in FTAs, particularly in Australia. These FTAs may still play a role by improving mutual recognition of skills, and limiting the impact of national reforms to restrict labour migration. However, we conclude that FTAs appear to be neither a manifestly successful instrument for significantly liberalizing labour mobility, nor an evidently desirable one. We call for a more holistic approach that refrains from temporary labour mobility programmes to meet permanent demand for labour, with respect for migrant workers’ rights at its core.
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Johnson, Gaylynn E., Karen M. Buzby, Kenneth J. Semmens, and Nicole L. Waterland. "Year-Round Lettuce (Lactuca sativa L.) Production in a Flow-Through Aquaponic System." Journal of Agricultural Science 9, no. 1 (December 7, 2016): 75. http://dx.doi.org/10.5539/jas.v9n1p75.
Повний текст джерелаАнотація:
<em><em></em></em><p>Aquaponics is the combination of hydroponics and aquaculture that sustainably produces both animal and plant food products. Soluble nutrients are released into water by the fish providing nutrition for plant growth. Lettuce (<em>Lactuca sativa</em> L.) is one of the most popular vegetables grown in aquaponic systems. In this experiment, the feasibility of year-round lettuce production utilizing a cold water flow-through aquaponic system (FTS) growing trout (<em>Oncorhynchus mykiss</em>) in a high tunnel was evaluated. A high tunnel is a greenhouse-like facility constructed with polyethylene covering a metal frame which extends the growing season and protects the crop from cold temperatures. The average night air temperature inside the high tunnel during winter in Wardensville, WV was 2.9±3.4 °C and it helped extend the growing period into the fall and winter. Results from this pilot scale experiment showed the potential for year-round lettuce production in an FTS. Average yield (fresh harvest weight per tray) in the spring season was the highest, while productivity (average yield per week) during the summer season was higher than that in spring. During the extended growing seasons (fall and winter), more than a quarter (30.6%) of the total lettuce production was obtained. The yield per unit area (7.4 kg m<sup>-2</sup>) from our pilot study was significantly higher than that from the reported average field production (3.1 kg m<sup>-2</sup>) in the U.S. except California and Arizona where year-round production of lettuce occurs. To compensate for lower lettuce yields during cold seasons, high value crops requiring less nutrients and tolerant to the colder environment may be considered.</p>
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O’Dowd, James A., David Lehoang, Rebecca K. Butler, David De Witt, and Raffy Mirzayan. "Trans-osseous versus Anchor Repair of Acute Patellar Tendon Ruptures." Orthopaedic Journal of Sports Medicine 6, no. 7_suppl4 (July 1, 2018): 2325967118S0013. http://dx.doi.org/10.1177/2325967118s00133.
Повний текст джерелаАнотація:
Objectives: Patellar tendon ruptures are relatively uncommon injuries. They require prompt diagnosis and surgical repair to restore the extensor mechanism of the knee. The gold standard procedure is a suture repair of the tendon, passed through trans-osseous tunnels, and tying of the sutures on the superior pole of the patella. Suture anchors have gained popularity with a recent cadaveric study demonstrating significantly less gap formation during cyclic loading and significantly higher ultimate failure loads. We present the largest series of patellar tendon repairs and compare the clinical outcomes and complications of trans-osseous (TO) and anchor (A) repair types. Methods: All patients who underwent a primary repair of a traumatic patellar tendon rupture within 45 days of injury, between 2007 and 2016, were retrospectively reviewed. Surgeries were performed at a multi-surgeon (114 surgeons), multi-center (13 centers) community-based integrated health care system. Patients with prior knee surgery, use of graft, patellar debridement for tendonitis, inferior pole avulsion fracture, concurrent knee surgery with other procedures were excluded. Patient demographic information, repair type, complications, and time from surgery to release from medical care were recorded. Results: 361 patients (374 knees) met our inclusion criteria. 13 had bilateral repairs during our study period and an additional 8 had a contralateral repair prior to our study period, for a bilateral incidence at 5.8%. The average age was 39.8 years (9 to 86 years). There were 341 males (94.5%). The most common mechanism of injury was basketball (47%), fall (19.5%), football (5.0%), and soccer (4.8%). Average time from injury to surgery was 6.3 days (range: 1- 45 days). There were 321 TO and 53 A repairs. There was no significant difference in the mean age (P=0.27), gender (P=0.79), tourniquet time (P=0.93), or BMI (P=0.78) between the two groups. There was a significant difference in re-rupture between (24 of 321) TO (7.5%) and (0 of 53) A (0%) (P=0.034). Using logistic regression, we found that TO had 3.244 times the odds of re-operation as those with A (95% CI: 0.757, 13.895. p-value: 0.1129) but did not reach signficance. The infection rate was 7.5% for A and 1.6% for TO (P= 0.160). There was no difference in time to release from medical care, 18.4 weeks for and 17.1 weeks (P=0.92). Conclusion: Compared to Anchors, primary repair of patellar tendon ruptures with trans-osseous repair had a significantly higher re-rupture rate, but there was no difference in re-operation rate, infection, or release from medical care.
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Johnson, James W., Robert D. Kriegel, and John C. Wise. "Blueberry, Full Season Control of Broad Spectrum Insect Pests, 1994." Arthropod Management Tests 20, no. 1 (January 1, 1995): 48. http://dx.doi.org/10.1093/amt/20.1.48.
Повний текст джерелаАнотація:
Abstract Insecticides were applied to mature blueberry bushes near Douglas, MI at a rate of 50 gpa with a FMC 1029 airblast sprayer. Treatments were arranged in a completely randomized design of single 44 foot-long rows of vines replicated 4 times. Funginex was applied separately to all treatments. Applications of materials were made on 16 Jun (Petal Fall), 22 Jun (PF), 21 Jul (BBM threshold) and 2 Aug (BBM threshold + 14 days). Maggot threshold was defined as the capture of 2 adult R. mendax flies in yellow sticky card traps sprayed with a saturated ammonium acetate solution. The first maggot spray was applied within 7 days of reaching the threshold. Damage from early season fruitworms was evaluated on 13 Jun. Damage was assessed by sampling 50 fruit clusters from each replicate. Each cluster was rated for the presence or absence of fruitworm injury. BBM injury was evaluated on 16 Aug. Maggot injury was assessed by picking 2 onepint subsamples of fruit from each replicate. Subsamples were processed by macerating one pint of berries and 2 cups of water in a blender. The solution was then poured through a series of sieves. Maggots were retained on the finest sieve. Results were expressed as maggots per pint of berries.
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Indarjani, Raden, and Mochamad Miko. "DISTRIBUSI VERTIKAL KOMUNITAS KUMBANG KOTORAN Scarabaeidae DI HABITAT TAMAN NASIONAL GUNUNG SALAK." Konservasi Hayati 16, no. 2 (October 25, 2020): 77–84. http://dx.doi.org/10.33369/hayati.v16i2.12670.
Повний текст джерелаАнотація:
Scarabaeidae dung beettles is a bioindicator through its function as decomposer, Scrabaeidae maintains the balance of environmental conditions that represented by the variation community structures. A study of Scarabaeidae was conducted to observe the variation of community structures related to different heights (900, 1400 dan 2000 masl) in Salak Halimun Mountains National Park (TNGHS), West Java. Pit Fall Dung Trap method was applied in a belt transect paralele with tracking line. In every height , there were 5 traps created with 10 meters distance among each other. In addition, the study also measured main abiotic paramters, such as type of susbtrate, soil acidity, soil temperature that presumed to have strong influence in establishment of the communities. The result showed that there was a variation in community structures related to different heights. In 900 masl, diversity index (H’) was 0.80 which caterogised as low, in 1400 masl, H’= 1,29 (middle) and H’=0,84 (low) was found in the 2000 masl. The community structures of Scarabaeidae in TNGHS were made up by genus of Onthophagus dan Copris that conssits of 4 (four) spesies, they were O. taurus, O. semicupreus, O. babirussoides dan Copris punctulatus. Onthophagus taurus considered as dominant species that filled 60 % or 339 individual of the communities. Meanwhile, Onthopagus babirussoides can be considered as rare species which only 8% been caught during study.
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Cottrell-Callbeck, Saraiah, Maggie MacDonald, and Maya Evenden. "Wing polymorphisms of Pterostichus melanarius (Coleoptera: Carabidae) (Illiger, 1978) in Alberta pulse crops." Alberta Academic Review 2, no. 2 (September 11, 2019): 23–24. http://dx.doi.org/10.29173/aar57.
Повний текст джерелаАнотація:
In a 6 week research project, a wing-dimorphic carabid species was studied to identify the proportions of macropterous (large functional wings) individuals and brachypterous (short, rudimentary wings) individuals from different pulse growing regions of Alberta. Pterostichus melanarius I. (Coleoptera: Carabidae) can be short-winged (SW) due to brachyptery being a dominant gene or long-winged (LW) individuals causing macroptery. Although macroptery is a recessive trait, the LW morph persists through the recolonization of populations due to human disturbance. Their ability to fly facilitates their dispersal across Alberta to uncolonized areas. Samples of P. melanarius were captured as bycatch from pea leaf weevil, Sitona lineatus L. (Coleoptera: Curculionidae) pitfall traps from the East, Capital, and Central regions of Alberta. Traps were positioned on a 175 meter transect pea and faba field margins in spring and again in the fall. Captured P. melanarius were identified and separated by collection site and date and stored in 95% ethanol until measurements. The beetles from the bycatch samples were sexed using tarsal characteristics. Anterior tarsal segments of the front pair of tarsi are dilated in males and normal in females. After being identified and recorded as “M” or “F”, they were mounted on a foam board with insect pins for measurement. The elytra (forewings) length and width was measured followed by measurement of their hindwings. They were classified as “SW” or “LW” depending on the functionality of their wings. Out of 440 individuals from the Capital region, 17.1% of captured P. melanarius were LW and 83.0% were SW. From the Central region 21.6% of 495 beetles were LW and 83.4% of them were SW. In the East region less P. melanarius were captured and from 94 individuals, 46.8% were LW and 53.2% were SW. Macropterous individuals are more common in the East region due to recolonization of populations whereas in the Central and Capital region the proportions of SW are much larger. In regions that have established populations of P. melanarius the proportions of SW are greater than LW.
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Hoover, Kelli, David L. Wood, Joseph W. Fox, and William E. Bros. "QUANTITATIVE AND SEASONAL ASSOCIATION OF THE PITCH CANKER FUNGUS, FUSARIUM SUBGLUTINANS F. SP. PINI WITH CONOPHTHORUS RADIATAE (COLEOPTERA: SCOLYTIDAE) AND ERNOBIUS PUNCTULATUS (COLEOPTERA: ANOBIIDAE) WHICH INFEST PINUS RADIATA." Canadian Entomologist 127, no. 1 (February 1995): 79–91. http://dx.doi.org/10.4039/ent12779-1.
Повний текст джерелаАнотація:
AbstractThe objective of this study was to determine the quantitative and seasonal association between the pitch canker fungus, Fusarium subglutinans f. sp. pini, and two potential beetle vectors, Conophthorus radiatae Hopkins and Ernobius punctulatus Fall. In samples of reared and dissected cones, 21.4 ± 2.5% of C. radiatae and 30.1 ± 8.0% of E. punctulatus adults carried propagules of F. s. pini. Seasonal variation in mean percentage of contaminated C. radiatae and E. punctulatus emerged from cones ranged from 0 to 67% and was highest for both species February through April. In sticky traps 12.5 ± 2.3% and 11.8 ± 3.6% of E. punctulatus and Pityophthorus spp., respectively, were contaminated with propagules of F. s. pini.Conophthorus radiatae and E. punctulatus co-occurred in 26% of the cones. The percentage of cones containing contaminated C. radiatae was greater when E. punctulatus progeny were also contaminated than when E. punctulatus was not. When contamination status of E. punctulatus was not considered, there was no significant difference in C. radiatae contamination between cones with and without E. punctulatus. Because C. radiatae appears to be a vector of the pitch canker fungus, interspecific transmission of inoculum may increase the incidence of this disease.The parasitoid, Cephalonomia utahensis Brues (Hymenoptera: Bethylidae), was frequently observed parasitizing late-instar larvae of E. punctulatus, but was not found on larvae of C. radiatae. Emergence of large numbers of C. utahensis represents another potential source of inoculum for transmission to prey species.
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Rani, S., D. K. Benbi, A. Rajasekaran, and S. K. Chauhan. "Litterfall, decomposition and nutrient release patterns of different tree species in Taran Taran district of Punjab, India." Journal of Applied and Natural Science 8, no. 3 (September 1, 2016): 1260–66. http://dx.doi.org/10.31018/jans.v8i3.951.
Повний текст джерелаАнотація:
The present investigation was attempted to assess the leaf litter production, decomposition rate and amount of major nutrient return in Populus deltoides, Eucalyptus tereticornis, Tectona grandis and Pyrus pyrifolia based agroforestry land use systems in Taran Taran district which falls in the north western agro-climatic zone of thePunjab state, India. The litter production in selected tree species was quantified using litter traps and decomposition pattern of leaf litter was investigated by litter bag technique. Litterfall in the selected tree species varied significantly (5 % level of significance) during different months of the study period. Among the four species, P. deltoides exhibited highest leaf litter production (7.8 tons/ha) followed by T. grandis (1.83 tons/ha) and E. tereticornis (1.77 tons/ha) whereas, lowest leaf litter production was observed in P. pyrifolia (0.34 tons/ha). The present study also showed that temperature as compared to rainfall play a significant (5 % level of significance) role in litter decomposition. In case of P. pyrifolia, P. deltoides and T. grandis decomposition take place 100 per cent, 98 per cent and 99 per cent respectively after 10 months whereas in E. tereticornis 87.7 per cent leaf decomposed after 10 months. The nutrients percentage through litter fall was maximum of nitrogen (2.27 %) followed by potassium (1.90 %) and phosphorous (0.32 %). Maximum and minimum N input through leaf litter was in P. deltoides (2.27 %) and P. pyrifolia (1.15 %). The K input (%) was maximum in leaves of T. grandis (0.32) and minimum in E. tereticornis (0.21). The maximum input of P (%) through leaf litter was in P. deltoides (1.90) whereas, minimum value was observed in E. tereticornis (1.27). Tree based agroforestry land use systems improve soil nutrient status as compared to traditional wheat and paddy based land use systems under this region of Punjab. Therefore tree based land use systems need to be promoted over the traditional field crops for realizing better environmental benefits in this region.
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Gamette, Pius, and Tony Talburt. "Political Transformation and Development in Africa: Lessons from Achebe’s Things Fall Apart." Asemka: A Bi-Lingual Literary Journal of University of Cape Coast, no. 10 (September 1, 2020): 298–313. http://dx.doi.org/10.47963/asemka.vi10.288.
Повний текст джерелаАнотація:
Drawing upon Achebe‟s classic work, Things Fall Apart, where Okonkwo, the principal character, refuses to accept intrusions or changes influenced by Westernisation, this paper challenges one of the central assumptions in this story, that Africa falls apart as soon as it comes in contact with Europe. Notwithstanding the overwhelmingly negative effects of the trans-Atlantic slavery systems and European colonialism on Africa (and its Diaspora), this study argues, that to a large extent, Africa‟s economic transformation and development could be greatly enhanced by adopting some new ideas and systems from within as well as outside the continent. This paper questions aspects of political conservatism exhibited in Okonkwo who is suspicious of fundamental changes to his society. The discussion is based on the jollof-rice principle of political hybridisation of development which proposes the amalgamation of Westernised and non-Western ideas and systems, in order to achieve economic development, rather than totally rejecting Westernisation in its entirety. The jollof-rice principle of political hybridisation is based on the idea of blending systems and ideas in much the same way that rice and tomato are combined in West Africa, to create jollof-rice. This study uses the academic discipline of international political economy in its analysis of themes of political conservatism and development in Africa, as portrayed in the Achebe‟s work. In contrast to Okonkwo‟s political conservatism, this study uses examples of Western-style democracy and state intervention in Africa to demonstrate the significance of embracing some aspects of Westernisation through political hybridisation.
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KHAIR, ADITYA S., and TODD M. SQUIRES. "Ion steric effects on electrophoresis of a colloidal particle." Journal of Fluid Mechanics 640 (November 13, 2009): 343–56. http://dx.doi.org/10.1017/s0022112009991728.
Повний текст джерелаАнотація:
We calculate the electrophoretic mobility Me of a spherical colloidal particle, using modified Poisson–Nernst–Planck (PNP) equations that account for steric repulsion between finite sized ions, through Bikerman's mean-field model (Bikerman, Phil. Mag., vol. 33, 1942, p. 384). Ion steric effects are controlled by the bulk volume fraction of ions ν, and for ν = 0 the standard PNP equations are recovered. An asymptotic analysis in the thin-double-layer limit reveals at small zeta potentials (ζ < kBT/e ≈ 25 mV) Me to increase linearly with ζ for all ν, as expected from the Helmholtz–Smoluchowski (HS) formula. For larger ζ, however, it is well known that surface conduction of ions within the double layer reduces Me below the HS result. Crucially, however, in the PNP equations surface conduction becomes significant precisely because of the aphysically large and unbounded counter-ion densities predicted at large ζ. In contrast, ion steric effects impose a limit on the counter-ion density, thereby mitigating surface conduction. Hence, Me does not fall as far below HS for finite sized ions (ν ≠ 0). Indeed, at sufficiently large ν, ion steric effects are so dramatic that a maximum in Me is not observed for physically reasonable values of ζ(≤ 10 kBT/e), in stark contrast to the PNP-based calculations of O'Brien & White (J. Chem. Soc. Faraday Trans. II, vol. 74, 1978, p. 1607) and O'Brien (J. Colloid Interface Sci., vol. 92, 1983, p. 204). Finally, by calculating a Dukhin–Bikerman number characterizing the relative importance of surface conduction, we collapse Me versus ζ data for different ν onto a single master curve.
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Ungureanu, Paula, Fabiola Bertolotti, and Diego Macri. "Brokers or platforms? A longitudinal study of how hybrid interorganizational partnerships for regional innovation deal with VUCA environments." European Journal of Innovation Management 21, no. 4 (October 8, 2018): 636–71. http://dx.doi.org/10.1108/ejim-01-2018-0015.
Повний текст джерелаАнотація:
Purpose The purpose of this paper is to investigate the role played by turbulent environments in the evolution of hybrid (i.e. multi-party, cross-sector) partnerships for regional innovation. Although extant research suggests that organizations decide to participate in such partnerships to cope with their turbulent environments, little is known about how actual perceptions of turbulent environments influence the setup and evolution of a partnership. Design/methodology/approach The qualitative study adopts a longitudinal design to investigate the evolution of a cross-sector regional innovation partnership between ten very different organizations. With the help of the VUCA (volatility, uncertainty, complexity and ambiguity) model proposed by Bennett and Lemoine (2014a), the authors study the relation between partners’ initial perceptions of environmental turbulence and the models adopted for the partnership throughout its lifecycle (emergent, brokering and platform). Findings The authors show that partners’ intentions to solve perceived environmental turbulence through collaboration can have the unexpected consequence of triggering perceived turbulence inside the collaboration itself. Specifically, the authors show that perceived partnership VUCA at each stage is a result of partners’ attempts to cope with the perceived VUCA in the previous stage. Practical implications The study highlights a set of common traps that both public and private organizations engaged in hybrid partnerships might fall into precisely as they try to lower VUCA threats in their environments. Originality/value The work accounts for the relationship between external and internal perceptions of VUCA in hybrid partnerships for regional innovation, and, in particular, provides a better understanding of what happens when organizations choose to enter hybrid partnerships in order to deal with perceived threats in their environments.
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Ann Amaratunga, Carol. "Building community disaster resilience through a virtual community of practice (VCOP)." International Journal of Disaster Resilience in the Built Environment 5, no. 1 (March 4, 2014): 66–78. http://dx.doi.org/10.1108/ijdrbe-05-2012-0012.
Повний текст джерелаАнотація:
Purpose – This paper aims to discuss a pilot in-progress project to promote community-based research (CBR) as a tool for disaster resilience planning in rural, remote and coastal communities. Using trans-disciplinary approaches, this project demonstrates how emergency and foresight planning in five rural Canadian pilot communities can be enhanced through the co-design of a pilot Web 2.0 “virtual community of practice” (VCOP). Design/methodology/approach – The VCOP initiative was designed with pilot and field site communities to facilitate knowledge generation and exchange and to enhance community resilience. Building a culturally appropriate disaster resilience process is an iterative “process of discovery” and community engagement. Through CBR the project supports practitioners and volunteers to share promising practices and lessons-learned for disaster resilience planning. Findings – The VCOP is being developed in five rural, remote, coastal pilot sites across Canada. Additional field site work is also underway in three urban centres sponsored by a project partner. This paper provides an overview of the initial concept, design and “proof of concept” work currently underway. The pilot project will end in the Fall 2012. Research limitations/implications – Inspired by the work of American adult educator Etienne Wenger, the VCOP entails co-design and co-ownership of a knowledge engagement process; one which enables local “thought leaders” to participate in emergency planning, preparedness, response and recovery. The VCOP provides a communication platform and fosters “foresight” planning and “education for critical awareness”. Through the sharing of theory and practice, i.e. praxis, communities are mobilized and empowered to anticipate future risks and threats and plan for resilient recovery. Practical implications – The VCOP foresight planning paradigm challenges the status quo design and delivery of emergency management protocols from traditional “centres of knowledge and power”, e.g. governments and universities and fosters “bottom-up” community-driven planning to anticipate risks and threats and help enhance local capacity for resilient disaster recovery. Originality/value – The novel application of a VCOP to disaster emergency planning is in keeping with the spirit and principles of UNISDR's Hyogo Framework for Action 2005-2015. VCOP has potential to demonstrate disaster resilience “foresight” planning as evidenced in the adoption of promising ideas and practices developed by communities, for communities. As Louis Pasteur once said “Chance favours the prepared mind”.
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Allen, K. E., S. de la Luna, R. M. Kerkhoven, R. Bernards, and N. B. La Thangue. "Distinct mechanisms of nuclear accumulation regulate the functional consequence of E2F transcription factors." Journal of Cell Science 110, no. 22 (November 15, 1997): 2819–31. http://dx.doi.org/10.1242/jcs.110.22.2819.
Повний текст джерелаАнотація:
Transcription factor E2F plays an important role in coordinating and integrating early cell cycle progression with the transcription apparatus. It is known that physiological E2F arises when a member of two families of proteins, E2F and DP, interact as E2F/DP heterodimers and that transcriptional activity is regulated through the physical association of pocket proteins such as pRb. However, little information is available regarding the mechanisms which control the levels of functional E2F. In this study, we have characterised one such mechanism which regulates the nuclear accumulation and activity of E2F. Specifically, we show that E2F proteins fall into two distinct categories according to their ability to accumulate in nuclei, one being exemplified by E2F-1 and the other by E2F-4 and -5. Thus, E2F-1 possesses an intrinsic nuclear localization signal whereas E2F-4 and -5 are devoid of such a signal. Furthermore, we find for E2F-4 and -5 that two distinct processes govern their nuclear accumulation whereby the nuclear localization signal is supplied in trans from either a DP heterodimer partner or a physically associated pocket protein. It is consistent with the role of pocket proteins in regulating nuclear accumulation that we find E2F-5 to be nuclear during early cell cycle progression with an increased cytoplasmic concentration in cycling cells. Our data show that the mechanism of nuclear accumulation determines the functional consequence of E2F on cell cycle progression: pocket protein-mediated accumulation impedes cell cycle progression, whereas DP-regulated nuclear accumulation promotes cell cycle progression. Moreover, the inactivation of pocket proteins by the adenovirus Ela protein, and subsequent release of E2F, failed to displace nuclear E2F. Our study identifies a new level of regulation in the control of E2F activity exerted at the level of nuclear accumulation where subunit composition and interaction with pocket proteins dictates the functional consequence on cell cycle progression.
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Chambers, Jeanne C. "Seed and vegetation dynamics in an alpine herb field: effects of disturbance type." Canadian Journal of Botany 71, no. 3 (March 1, 1993): 471–85. http://dx.doi.org/10.1139/b93-052.
Повний текст джерелаАнотація:
Relationships among the aboveground vegetation, seed rain, and seed bank were examined on a late seral herb field characterized by pocket gopher disturbance and on an early seral gravel borrow that had been severely disturbed 35 years ago on the Beartooth Plateau, Montana. Aboveground vegetation cover was assessed by species in twelve 5-m2 plots. Seed rain was sampled during the 1988, 1989, and 1990 growing seasons with pitfall traps, and the soil seed bank was sampled in fall 1989, spring 1990, and fall 1990. The seed rain (filled seeds) on the borrow area ranged from 7730 to 14 009 seeds/m2 and was higher than that found on other alpine sites; that on the Geum turf ranged from 3375 to 6179 seeds/m2 and was similar to that for other alpine sites. Although highly variable among dates on the borrow area, the seed banks were similar to those of comparable alpine sites. Seed bank density ranged from 1980 to 6003 seeds/m2 on the borrow area and from 3202 to 4647 seeds/m2 on the Geum turf area. The Geum turf area had higher vegetation cover than the borrow area (87 vs. 25%) and higher numbers of species in the aboveground vegetation, seed rain, and seed bank. Relationships among the aboveground vegetation, seed rain, and seed bank were largely determined by the disturbance characteristics of the different sites and the life-history strategies of the dominant species. Medium-lived species, primarily grasses, with high production of small and compact seeds had colonized the borrow area. Despite establishment of other species, 35 years after disturbance the medium-lived species still dominated the aboveground vegetation, seed rain, and seed bank. Species abundances in the three different components were all highly correlated. In contrast, on the Geum turf area there were no correlations among the aboveground vegetation, seed rain, or seed bank. Long-lived forbs that produced low numbers of relatively large seeds dominated the aboveground vegetation and persisted on the area primarily in the vegetative state. The same medium-lived species that dominated the borrow area had the highest abundance in the seed rain on the Geum turf area and appeared to persist by colonizing small-scale disturbances caused by gopher burrowing. Short-lived species with small, long-lived seeds existed on the site primarily through a highly persistent seed bank. The relationships among the aboveground vegetation, seed rain, and seed bank on the Geum turf and borrow areas are compared with those observed for more temperate systems following disturbance. Key words: alpine, herb field, Geum turf, disturbance, vegetation cover, seed rain, seed bank, colonization, establishment, succession.
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Garibaldi, A., A. Minuto, and M. L. Gullino. "First Report of Powdery Mildew Caused by Leveillula clavata on Poinsettia (Euphorbia pulcherrima) in Italy." Plant Disease 90, no. 6 (June 2006): 827. http://dx.doi.org/10.1094/pd-90-0827c.
Повний текст джерелаАнотація:
Euphorbia pulcherrima (poinsettia) is a winter-flowering plant grown primarily for Christmas sales. During the fall of 2005, severe outbreaks of a previously unknown powdery mildew were observed on cv. Gala in a commercial greenhouse located in Albenga (northern Italy). The abaxial surfaces of green leaves were irregularly covered with white mycelia and conidia, while the adaxial surfaces only showed slight chlorotic round lesions. As the disease progressed, mycelium turned from rose to reddish. Symptoms and signs were never observed on red bracts. Conidia were clavate (55 to 95 × 20 to 40 μm, average 70 × 23 μm) and borne singly on conidiophores that emerged through stomata. On the basis of host, morphological characteristics, and microscopic observations of the intercellular colonization of mesophyll cells, the pathogen was identified as a species of Oidiopsis. Although chasmothecia were not observed, the causal agent based on the literature is believed to be Leveillula clavata Nour (2). Pathogenicity was confirmed by inoculating young leaves of three 4-month-old E. pulcherrima plants, cv. Gala, with a conidial suspension (3 × 105 conidia/ml). Three noninoculated plants sprayed with deionized water served as control. After inoculation, plants were maintained in a growth chamber at 18°C with relative humidity ranging from 56 to 100%. After 20 days, powdery mildew symptoms were observed on leaves of inoculated plants. Noninoculated plants remained healthy. The pathogenicity test was carried out twice. To our knowledge, this is the first report of L. clavata on poinsettia in Italy and probably in Europe. It presently is restricted to a few commercial farms. L. clavata previously has been observed on poinsettia in Kenya (1,2). Voucher specimens are available at the AGROINNOVA Collection, University of Torino. References: (1) M. L. Daughtrey et al. Powdery Mildew Diseases. Pages 39–42 in: Compendium of Flowering Potted Plant Diseases. The American Phytopathological Society, St. Paul, MN, 1995. (2) M. A. Nour. Trans. Brit. Mycol. Soc. 40:477, 1957.
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Gunnar, Prause, and Hoffmann Thomas. "Innovative Management of Common-Pool Resources by Smart Contracts." Marketing and Management of Innovations, no. 1 (2020): 265–73. http://dx.doi.org/10.21272/mmi.2020.1-22.
Повний текст джерелаАнотація:
The access to common-pool resources, i.e. to resources in limited common property, are legally distributed in a far more diverse way than limited private property resources. In transportation, a critical case for common-pool resources appear in Green Transport Corridors (GTC), that has been coined by European Union as being «sustainable logistics solutions for cargo transportation’ with a shared pool of resources aiming for multimodal trans-shipment routes with a concentration of freight traffic between significant hubs». Although there are already existing implementations of GTC concepts, there are still a lot of open questions concerning GTC governance and ownership models hindering easy marketing of the GTC approach. This paper discusses how and to which extent smart contracts in combination with blockchain technology as innovative solutions are able to facilitate GTC governance and how smart contracts can be applied to provide legal certainty by managing and allocating distributed access to common-pool resources. Smart contracts can be considered as computerised transaction protocols for the execution of underlying legal contracts, and they do not only target reducing transaction costs by realising trackable and irreversible transactions through blockchain technology for distributed databases, but also show high potential to strengthen cooperative business structures and to facilitate the entrepreneurial collaboration of cross-organisational business processes. From a legal perspective, it is controversial whether the use of smart contracts to distribute access to resources in terms of both general common-pool resources. GTCs implies an added value automatically for legal certainty and fair balance among different forms and degrees of access granted to different members of the cooperative. In cases of incorrect performance, change of circumstances or unduly induced contracts smart contracts fall considerably short on the protection of weaker parties, which the paper illustrates at the example of GTCs to be a decisive detriment of the cooperative members. The paper analyses these potentials and risks of smart contracts for the case of GTCs and showcases from both business and legal perspective in terms of their potential as viable means of distributing access to common-pool resources comprising infrastructure. Keywords common-pool resources, cooperative governance, blockchain, smart contracts, Green Transport Corridors.
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Kemp, Sharon. "A Conversation on Conversations: A Research Journey with Professor Anne Sigismund Hufe - Technische Universität München (TUM)." Journal of Management & Organization 11, no. 2 (March 2005): 4–12. http://dx.doi.org/10.1017/s1833367200004259.
Повний текст джерелаАнотація:
Anne S. Huff has a reputation that goes before her for helping other academics, particularly in their endeavours to have their work published. I attended one of Anne's sessions on writing for scholarly publication and had my eyes opened to the traps a researcher can fall into; I was also made aware of ways to focus my effort to maximum effect In the workshop sessions that Anne conducts she shares her successes but also acknowledges she too had difficulties in getting her research accepted for publication. I trusted that her advice was sound because she has been there and done that.Some time after the workshop I felt the need to bring the conversations that we had during that workshop to a wider audience. I asked Anne if she would consent to an interview that would take readers along one of her research journeys. To my surprise Anne was more than delighted to do the interview and she found the idea of having the focus of our conversation on the process or research journey she undertook rather than the outcomes that are usually reported in journals quite novel. We agreed to meet at the EURAM 2005 conference which she co-organised.Research is reported in a different way than it was first conceived An interesting (but often undiscussed) aspect of research is the process or journey that is undertaken to reach the reported outcomes. Junior and senior staff alike can learn a great deal from understanding the research journey that eminent scholars have undertaken. In this conversation Professor Huff takes us along the research path she followed in several projects, especially work with Professor Louis Pondy between 1979 and 1986. Anne discusses how the research changed shape over time as well as detailing how and why the research came to an end. She gives us an insight into problems that resulted in deviations from an initial research plan. Through Anne's discussion of the research we discover how issues were handled and with the benefit of hindsight what aspects of the research she would change. Finally, Anne shares some general lessons for undertaking research.
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Lacerda, Norma. "O campo do Planejamento Urbano e Regional: da multidisciplinaridade à transdisciplinaridade." Revista Brasileira de Estudos Urbanos e Regionais 15, no. 1 (May 31, 2013): 77. http://dx.doi.org/10.22296/2317-1529.2013v15n1p77.
Повний текст джерелаАнотація:
É comum em textos e debates acadêmicos sobre o planejamento urbano e regional realçar-se que ele exige abordagens multi ou inter e/ou transdisciplinar, sem que sejam esclarecidos os respectivos significados desses termos. Diante dessa lacuna, o presente ensaio tem a pretensão de mostrar o caráter multidimensional dessa área do conhecimento, sob a perspectiva desses três tipos de análise. Para tanto, (i) explicita-se que esse caráter recomenda adotar-se a noção de campo do conhecimento; (ii) relembra-se a ascensão e o declínio do cientificismo – aqui entendido como a presunção da existência deum paradigma único, na construção da ciência –, percorrendo alguns eventos científicos, que questionaram os seus postulados e evidenciaram a necessidade de novos paradigmas analíticos; e (iii) detalham-se as características de cada um desses três tipos de abordagem, enfatizando a importância de um processo de atualização dos saberes e práticas, inerentes a esse campo do conhecimento, pari passu às mudanças responsáveis por um mundo cada vez socialmente mais complexo. Palavras-chave: multidisciplinaridade; interdisciplinaridade; transdisciplinaridade; planejamento urbano e regional. Abstract: It is common in texts and academic debates on urban and regional planning for it to be emphasized that it requires multi or inter and/or trans-disciplinary approaches without the respective meanings of these terms being made clear. Given this gap, this paper sets out to show the multidimensional nature of this area of knowledge, from the perspective of these three types of analysis. Therefore, (i) it makes explicit that by being of this nature it is recommended that the notion of field of knowledge be adopted, (ii) a reminder is given of the rise and fall of scientism - here understood as the presumption of there being a single paradigm in the construction of science – running through some scientific events which questioned such assumptions and showed evidence of the need for new analytical paradigms; and (iii) details are given of the characteristics of each of these three types of approach, emphasizing the importance of a process of updating knowledge and practices, inherent in this field of knowledge, and one which goes hand-in-hand with changes that have brought about an ever more socially complex world. Keywords: multidisciplinarity; interdisciplinarity; transdisciplinarity; urban and regional planning.
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Kemp, Sharon. "A Conversation on Conversations: A Research Journey with Professor Anne Sigismund Hufe - Technische Universität München (TUM)." Journal of the Australian and New Zealand Academy of Management 11, no. 2 (March 2005): 4–12. http://dx.doi.org/10.5172/jmo.2005.11.2.4.
Повний текст джерелаАнотація:
Anne S. Huff has a reputation that goes before her for helping other academics, particularly in their endeavours to have their work published. I attended one of Anne's sessions on writing for scholarly publication and had my eyes opened to the traps a researcher can fall into; I was also made aware of ways to focus my effort to maximum effect In the workshop sessions that Anne conducts she shares her successes but also acknowledges she too had difficulties in getting her research accepted for publication. I trusted that her advice was sound because she has been there and done that.Some time after the workshop I felt the need to bring the conversations that we had during that workshop to a wider audience. I asked Anne if she would consent to an interview that would take readers along one of her research journeys. To my surprise Anne was more than delighted to do the interview and she found the idea of having the focus of our conversation on the process or research journey she undertook rather than the outcomes that are usually reported in journals quite novel. We agreed to meet at the EURAM 2005 conference which she co-organised.Research is reported in a different way than it was first conceived An interesting (but often undiscussed) aspect of research is the process or journey that is undertaken to reach the reported outcomes. Junior and senior staff alike can learn a great deal from understanding the research journey that eminent scholars have undertaken. In this conversation Professor Huff takes us along the research path she followed in several projects, especially work with Professor Louis Pondy between 1979 and 1986. Anne discusses how the research changed shape over time as well as detailing how and why the research came to an end. She gives us an insight into problems that resulted in deviations from an initial research plan. Through Anne's discussion of the research we discover how issues were handled and with the benefit of hindsight what aspects of the research she would change. Finally, Anne shares some general lessons for undertaking research.
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Chandra, A., A. Yadav, K. Chandan, and R. Mehrotra. "Regulatory Compliance: A Challenge for Unbranded Smokeless Tobacco Products." Journal of Global Oncology 4, Supplement 2 (October 1, 2018): 197s. http://dx.doi.org/10.1200/jgo.18.79402.
Повний текст джерелаАнотація:
Background: Smokeless tobacco (SLT) is available in many forms in India and is widely used by all social groups. SLT market in India is the world largest market. Over the last 2 decades, the SLT industry in India has grown immensely, mostly in cottage industry sector and unorganized sector. Several SLT products are self-made or mixed by users themselves. This presents a great challenge for regulation of such unbranded and loose products. Cancer of the oral cavity and the pharynx are a major public health problem in India. At least 90% of these cancers are caused by SLT products use. Aim: To study the challenges for unbranded SLT products in implementing the mandated regulatory compliances under the Indian Tobacco Control Law that applies to all tobacco products. Methods: The information on unbranded/loose SLT products was collected through literature search, field trips, discussions with SLT product vendors and with community members of different age group. Results: Several types of unbranded SLT products are sold both in urban and rural India. These unbranded products vary from state to state. In some cases they vary from 1 place to another within a state. Most of the unbranded products do not comply with the legal mandates of the Indian tobacco control (COTPA) and food safety (FSSA) laws that regulate sale of tobacco products. The biggest fall-out of unbranded sale is that there is no pictorial health warnings to warn the users about the ill effects of these SLT products as required under section 7 of COTPA. In addition these products also do not mention the minimum requirement of the packaging and labeling under the legal metrology law. In absence of the pictorial health warnings these SLT products become more accessible and affordable to minors. The FSSA prohibits use of tobacco and nicotine as ingredient in any food item, however, most of the unbranded SLT products are sold with added flavorings, condiments and spices which are classified as food. Conclusion: Strict implementation of the mandated regulatory provisions is needed to check the unrestricted sale of unbranded products. Noncompliant unbranded/loose SLT products should be confiscated as per the prescriptions of the existing tobacco control and food safety laws. Findings from this paper calls for development of policies that will prevent sale of unbranded/loose SLT products in India to protect the unsuspecting youth and other vulnerable group of population from these cancer traps.
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Badat, Mohsin, Peng Hua, Sachith Mettananda, Christopher Fisher, Noemi Roy, Siobhan Rice, Anindita Roy, Douglas R. Higgs та James Davies. "Base Editing Repairs the HbE Mutation Restoring the Production of Normal Globin Chains in Severe HbE/β-Thalassemia Patient Hematopoietic Stem Cells and Erythroid Cells". Blood 138, Supplement 1 (5 листопада 2021): 2935. http://dx.doi.org/10.1182/blood-2021-153283.
Повний текст джерелаАнотація:
Abstract HbE/β-thalassemia is the commonest form of severe β-thalassemia, and comprises approximately 50% of all cases worldwide. HbE/β-thalassemia is caused by the HbE codon 26 G>A mutation on one allele and any severe β 0-thalassemia mutation on the other. These mutations lead to a reduction in β-globin production, resulting in a relative excess in α-globin chains that go on to cause ineffective erythropoiesis. Importantly, individuals with a mutation on one, but not two, alleles have β-thalassemia trait, a carrier state with a normal phenotype. Recent gene therapy and gene editing approaches have been developed to treat β-thalassemia but do not directly repair the causative mutation in-situ. Gene replacement approaches rely on lentiviral vector-based sequence insertion or homology directed repair (HDR). HbF induction strategies also rely on non-homologous end joining (NHEJ) targeting of enhancers in-trans. These approaches, whilst variably successful, are associated with potential safety concerns. Adenine base editors (ABEs) potentially circumvent these problems by directly repairing pathogenic variants in-situ through deamination. ABEs catalyse A-T to G-C conversions through targeting with a Cas9-nickase and single-guide RNA (sgRNA). Conversion of the HbE codon to normal through base editing is an attractive strategy to recapitulate the phenotypically normal β-thalassemia trait state without potentially harmful double-strand breaks or random vector insertions (Figure 1A). ABEs are able to convert the HbE codon (AAG, lys) to wild-type (GAG, glu), but also to GGG (gly) or AGG (arg). GGG at codon 26 is found in a naturally occurring hemoglobin, Hb Aubenas. Heterozygotes have normal red cell indices and are phenotypically normal. We electroporated the latest generation of ABE8 editors (ABE8e, ABE8.13 and ABE8 V106W) as mRNA into WT CD34+ hematopoietic stem and progenitor cells (HSPCs) with sgRNAs targeting the middle A of the WT GAG codon. These had similar editing efficiencies although ABE8 V106W had marginally higher on-target efficiency. V106W has been evolved to have a favourable off-target profile. V106W mRNA/sgRNA was electroporated into 3 different severe HbE/β-thalassemia donor HSPCs. The HbE codon was converted to WT with a mean 28.7% efficiency, to Hb Aubenas 48.6% and to an undescribed AGG codon 2.1%. The mean conversion from HbE to a normal or normal variant was 78.7±8.7% (Figure 1B). The indel rate from inadvertent on-target Cas9 cleavage was below 0.5%. Edited cells did not show any perturbations in erythroid differentiation as assessed by Immunophenotyping and cellular morphology. In differentiated erythroid cells, RT-qPCR showed a mean fall in the α/β mRNA ratio to 0.65±0.08 (unedited patient cells normalised to 1, n=5, Figure 1C), indicating a reduction in the relative excess α-globin gene expression. Protein analysis by CE-HPLC showed a 3.6-fold reduction in HbE levels (SD±1.3) and a 13.5-fold increase in HbA/Hb Aubenas (SD±2.4, Figure 1C and D). To prove that base editing using mRNA was possible in long-term HSCs, CD34+ cells from 4 WT cord blood donors were edited using ABEmax. Mice were culled after 16 weeks, and human cells were collected and transplanted into 7 secondary mice, which were also culled after 16 weeks. Each secondary mouse showed the presence of hCD45+ cells, indicating engraftment of LT-HSCs. All secondary replicates showed editing, with a mean editing efficiency of 34.5% (initial editing 46.3%). In both rounds of mice, there was robust lymphoid and myeloid engraftment and expected levels of erythroid engraftment for the NSG model in bone marrow and spleen. Potential off-target effects were assessed in-vitro by CIRCLE-seq in triplicate. These sites were assessed by targeted oligonucleotide capture of DNA from mRNA edited patient cells to detect in-vivo editing. Together these data provide robust evidence for base editing as an effective and safe therapeutic strategy for HbE/β-thalassemia. Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.
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Farrell, A. P., E. J. Eliason, E. Sandblom, and T. D. Clark. "Fish cardiorespiratory physiology in an era of climate changeThe present review is one of a series of occasional review articles that have been invited by the Editors and will feature the broad range of disciplines and expertise represented in our Editorial Advisory Board." Canadian Journal of Zoology 87, no. 10 (October 2009): 835–51. http://dx.doi.org/10.1139/z09-092.
Повний текст джерелаАнотація:
This review examines selected areas of cardiovascular physiology where there have been impressive gains of knowledge and indicates fertile areas for future research. Because arterial blood is usually fully saturated with oxygen, increasing cardiac output is the only means for transferring substantially more oxygen to tissues. Consequently, any behavioural or environmental change that alters oxygen uptake typically involves a change in cardiac output, which in fishes can amount to a threefold change. During exercise, not all fishes necessarily have the same ability as salmonids to increase cardiac output by increasing stroke volume; they rely more on increases in heart rate instead. The benefits associated with increasing cardiac output via stroke volume or heart rate are unclear. Regardless, all fishes examined so far show an exquisite cardiac sensitivity to filling pressure and the cellular basis for this heightened cardiac stretch sensitivity in fish is being unraveled. Even so, a fully integrated picture of cardiovascular functioning in fishes is hampered by a dearth of studies on venous circulatory control. Potent positive cardiac inotropy involves stimulation of sarcolemmal β-adrenoceptors, which increases the peak trans-sarcolemmal current for calcium and the intracellular calcium transient available for binding to troponin C. However, adrenergic sensitivity is temperature-dependent in part through effects on membrane currents and receptor density. The membrane currents contributing to the pacemaker action potential are also being studied but remain a prime area for further study. Why maximum heart rate is limited to a low rate in most fishes compared with similar-sized mammals, even when Q10 effects are considered, remains a mystery. Fish hearts have up to three oxygen supply routes. The degree of coronary capillarization circulation is of primary importance to the compact myocardium, unlike the spongy myocardium, where venous oxygen partial pressure appears to be the critical factor in terms of oxygen delivery. Air-breathing fishes can boost the venous oxygen content and oxygen partial pressure by taking an air breath, thereby providing a third myocardial oxygen supply route that perhaps compensates for the potentially precarious supply to the spongy myocardium during hypoxia and exercise. In addition to venous hypoxemia, acidemia and hyperkalemia can accompany exhaustive exercise and acute warming, perhaps impairing the heart were it not for a cardiac protection mechanism afforded by β-adrenergic stimulation. With warming, however, a mismatch between an animal’s demand for oxygen (a Q10 effect) and the capacity of the circulatory and ventilatory systems to delivery this oxygen develops beyond an optimum temperature. At temperature extremes in salmon, it is proposed that detrimental changes in venous blood composition, coupled with a breakdown of the cardiac protective mechanism, is a potential mechanism to explain the decline in maximum and cardiac arrhythmias that are observed. Furthermore, the fall off in scope for heart rate and cardiac output is used to explain the decrease in aerobic scope above the optimum temperature, which may then explain the field observation that adult sockeye salmon ( Oncorhynchus nerka (Walbaum in Artedi, 1792)) have difficulty migrating to their spawning area at temperatures above their optimum. Such mechanistic linkages to lifetime fitness, whether they are cardiovascular or not, should assist with predictions in this era of global climate change.