44 research outputs found
Design of miniature thermal chamber
No full textThis thesis is about designing and bulding temperature chamber. Main use for this chamber is to test devices which are designed in Mechlab laboratory. While I was developing this chamber I used Simuling for simulation of thermodynamic events. For LC filter simulation I used LTspice IV. Peltiers device is used as cooling/heating element. For calculation and control is used 3.5“ touch screen programmed in 4D Workshop. Final device is capable to automatically maintain set temperature in range of -13°C to 80°C. Temperature can be set as stationary or cyclic between two predefined temperatures. User can also choose temperature that will be used by regulator
Long-Term Changes of Source Apportioned Particle Number Concentrations in a Metropolitan Area of the Northeastern United States
No full textThe northeastern United States has experienced significant emissions reductions in the last two decades leading to a decrease in PM2.5, major gaseous pollutants (SO2, CO, NOx) and ultrafine particles (UFPs) concentrations. Emissions controls were implemented for coal-fired power plants, and new heavy-duty diesel trucks were equipped with particle traps and NOx control systems, and ultralow sulfur content is mandatory for both road and non-road diesel as well as residual oil for space heating. At the same time, economic changes also influenced the trends in air pollutants. Investigating the influence of these changes on ultrafine particle sources is fundamental to determine the success of the mitigation strategies and to plan future actions. Particle size distributions have been measured in Rochester, NY since January 2002. The particle sources were investigated with positive matrix factorization (PMF) of the size distributions (11–470 nm) and measured criteria pollutants during five periods (2002–2003, 2004–2007, 2008–2010, 2011–2013, and 2014–2016) and three seasons (winter, summer, and transition). Monthly, weekly, and hourly source contributions patterns were evaluated
Long-term trends in submicron particle concentrations in a metropolitan area of the northeastern United States
No full textSignificant changes in emission sources have occurred in the northeastern United States over the past decade, due in part to the implementation of emissions standards, the introduction and addition of abatement technologies for road transport, changes in fuel sulfur content for road and non-road transport, as well as economic impacts of a major recession and differential fuel prices. These changes in emission scenarios likely affected the concentrations of airborne submicron particles. This study investigated the characteristics of 11–500 nm particle number concentrations and their size spectra in Rochester, NY during the past 15 years (2002 to 2016). The modal structure, diurnal, weekly and monthly patterns of particle number concentrations are analyzed. Long-term trends are quantified using seasonal-trend decomposition procedures based on “Loess”, Mann-Kendall regression with Theil-Sen slope and piecewise regression. Particle concentrations underwent significant (p < 0.05) downward trends. An annual decrease of −323 particles/cm3/y (−4.6%/y) was estimated for the total particle number concentration using Theil-Sen analysis. The trends were driven mainly by the decrease in particles in the 11–50 nm range (−181 particles/cm3/y; −4.7%/y). Slope changes were investigated annually and seasonally. Piecewise regression found different slopes for different portions of the overall period with the strongest declines between 2005 and 2011/2013, followed by small upward trends between 2013 and 2016 for most size bins, possibly representing increased vehicular traffic after the recovery from the 2008 recession
Estimating Hourly Concentrations of PM2.5 across a Metropolitan Area Using Low-Cost Particle Monitors
No full textThere is concern regarding the heterogeneity of exposure to airborne particulate matter (PM) across urban areas leading to negatively biased health effects models. New, low-cost sensors now permit continuous and simultaneous measurements to be made in multiple locations. Measurements of ambient PM were made from October to April 2015–2016 and 2016–2017 to assess the spatial and temporal variability in PM and the relative importance of traffic and wood smoke to outdoor PM concentrations in Rochester, NY, USA. In general, there was moderate spatial inhomogeneity, as indicated by multiple pairwise measures including coefficient of divergence and signed rank tests of the value distributions. Pearson correlation coefficients were often moderate (~50% of units showed correlations >0.5 during the first season), indicating that there was some coherent variation across the area, likely driven by a combination of meteorological conditions (wind speed, direction, and mixed layer heights) and the concentration of PM2.5 being transported into the region. Although the accuracy of these PM sensors is limited, they are sufficiently precise relative to one another and to research grade instruments that they can be useful is assessing the spatial and temporal variations across an area and provide concentration estimates based on higher-quality central site monitoring data
Ukrainian psychologists denied use of their language
No full textThe author as a participant in the US-USSR National Academy of Sciences Exchange Program in 1974 adds a personal example to I. Z. Holowinsky\u27s article on Russification of Ukrainian psychologists. The author was told by a Ukrainian scientist that although Ukrainian was the official language, researchers who used their native Ukrainian instead of Russian sacrificed any opportunity for advancement in their scientific careers. (PsycINFO Database Record (c) 2006 APA, all rights reserved)
Company's Entry into Foreign Markets as a Concurrency Advantage
No full textCílem bakalářské práce je vypracovat návrh vstupu na nový zahraniční trh a analyzovat výhodu vstupu společnosti JAWA MOTO spol. s r. o., která se zabývá výzkumem, vývojem a výrobou motocyklů. Práce je rozdělena na teoretickou a praktickou část. V první části je popsán zahraniční obchod, analýzy marketingového prostředí, rizika spojená se vstupem na mezinárodní trh a jednotlivé formy vstupu. V praktické části je provedena PEST analýza a Porterova analýza pěti konkurenčních sil, na základě jejich výsledků je zpracována SWOT analýza, ze které vychází doporučená strategie pro společnost. V poslední části je PEST analýza vybraného trhu a na základě analýzy je zvolena vhodná forma vstupu na zahraniční trh a její konkurenční výhoda.Company's Entry into Foreign Markets as a Concurrency AdvantageGoal of the bachelor's thesis is devising an entry into a foreign market and analyzeadvantages the entry of company JAWA MOTO spol. s r. o., which deals with a research, developing and creation of motorcycles. Thesis is divided into theoretical and practical parts. First part describes international trade, analytics of the marketing environment, risks linked to the entry into the international trade and individual forms of entry. Practical part includes PEST analysis and Porter's analysis of five competitive forces, which stand as a basis for SWOT analysis leading to recommended strategy for the company. In the end according to a PEST analysis of a selected market is chosen an appropriate form of entry into a foreignmarket and its competitive advantage
Pedagogical methodologies in teaching critical thinking skills to basic police recruits at Madison Area Technical College
No full textPlan BPolice officers working in the year 2000 have a much different job than those working a few short years ago. In the 1960s, despite the threat of faster response times and more officers on the street, crime rates continued to rise. To address this, police agencies developed community relations units to improve their image (Gaines, 1991). The focus of the police, as "crook catchers" and responding when called, was gradually transferred into preventing crime. This was the beginning of Community Policing. Community Policing requires officers to be pro-active in their function, rather than the time honored re-active. To be successful, officers must be able to solve problems using higher level thinking than was traditionally required. This higher level of problem solving necessitates that officers possess critical thinking ability. The research hypotheses of this study was that a majority of the instructional methodology used during the Madison Area Technical College Law Enforcement Basic Recruit Academy does not encourage critical thinking and problem solving skills in its graduates. The subjects for this study were adults accepted into the 69th Basic Police Recruit Academy of the Madison Area Technical College (MATC). The instrument chosen to test the level of critical thinking skills for this study was the California Critical Thinking Skills Test (CCTST). The instrument, as a pre-test, was presented to the subjects during their first week of training. A consent form along with a short demographic questionnaire accompanied the instrument. A post-test was presented to the subjects during their last week of training. Accompanying the post-test was a short questionnaire asking the respondents to identify the methods of instruction used during the training period and to estimate the percentage of time each of the methods were used. A similar survey was sent to instructors who presented material during the training, asking that they identify topics covered, time allowed for each topic, and methodologies used. The lecture method of teaching was by far the most often used methodology during the 69th Class of MATC’s Basic Recruit Academy. To learn critical thinking skills, trainees are best taught using interactive methodologies. Pre and post-test data collected indicated that the graduates of the 69th Class of MATC’s Basic Recruit Academy did not gain in the area of critical thinking skills
Enantioselective Synthesis of Cephalimysins B and C
No full textThe
first synthesis of cephalimysins B and C is reported. The route
features a Ni(II)–diamine-catalyzed enantioselective conjugate
addition of a densely substituted 3(2H)-furanone
and an efficient dihydroxylation–lactonization sequence as
key steps in the assembly of the spirocyclic core. The fully synthetic
strategy is amenable to analog preparation
The transformative nature of transparency in research funding
No full textThis is a manuscript submitted to PLOS Biology on November 4, 2014 as a commentary on an accepted manuscript by David Gurwitz, Elena Milanesi and Thomas Koenig, entitled "Grant Application Review: The Case of Transparency".
It was accepted on November 10, 2014.The manuscript was drafted in LaTeX and following the guidelines at http://www.plosbiology.org/static/latexGuidelines (archived at http://www.webcitation.org/6TrgzvX3e ), using plos2009.bst and plos_template.tex that are available from there and copied here for archival purposes
