Preparation of briquettes on the basis of desintegrated phyto-materials and the admixture of fine-grained coal and coke

The contribution deals with the preparation of small-diameter briquettes on the basis of desintegrated phyto-materials and the admixture of coal and coke. The phyto-materials are classified as a dry biomass that can be, on the one hand, the wastes from wood-working industry,(sawdust, chips, bark, etc.) or dried mass from the plant production and, on the other hand, the mass of quick-growing plants cultivated on special plantations. In present time this renewable energy resource attracts attention by its heating value ranging from 10 to 16 MJ.kg-1 (EkoWATT, 2001), a low ash content of 0.5 6.5 % and by a low sulphur content in a water free sample of 0.05 0.12 %.As a phyto-material the spruce sawdusts having a grain size of 2 mm were used. The admixture of brown coal, hard coal and coke with a grain size of 0.040 mm was added to the sawdust and in such way prepared mixtures were subjected to briquetting with the aim to obtain small-diameter briquettes. The influence of admixtures amount on the density, and the suitable briquetting press have been studied. A saleability of briquettes on the basis of phyto-materials is conditioned by their density that must be higher than 1,000 kg.m-3. Thus, an adding of denser material with a relatively high calorific value would enable to attain the required density as well as to retain and/or to improve the main utility properties, i.e. calorific value and ash content.The adding evinces itself in an enhancement of briquetting press, but also density of obtained briquettes is often much higher that required by the market. It was showed that in the case of clear spruce sawdust the density of 1,059 kg.m-3 under the briquetting press of 250 MPa can be attained. According to other results, an admixture of brown coal is not very favourable because briquetting press exceeds the value of 300 MPa. As to hard coal adding, the presses under 250 MPa were achieved at the content of 25 30 %. The density of these briquettes ranges from 1,050 1,085 kg.m-3. The best results have been obtained by adding coke. The briquetting press lower than 250 MPa has already been attained at the coke content of 15 %. The further increase of the coke content up to 30 % resulted in the briquetting press of 185 MPa. The density of briquettes with the admixture of coke was from 1,037 to 1,063 kg.m-3

Conceptualizing Asexual Identities

In current literature, there is little congruence on an inclusive definition of human asexuality. This study explored individuals’ self-identification with asexuality as well as their conceptualization of that identity via thematic analysis. Using a Qualtrics XM survey, 374 individuals (18+ years old) answer questions regarding their experience as a person identifying themselves as asexual. Identity label authenticity, perceived impact of compulsory heterosexuality and heteronormativity on participants\u27 current identity within the asexual spectrum, and prescribed heteronormative ideals were correlated. Thematic analysis revealed themes such as confusion about identity membership, feeling abnormal, the burden of living in a heteronormative society, and identity confidence. Participants described diverse experiences with asexuality, underscoring the necessity of establishing inclusive understandings of asexuality and its sub-identities such as demisexuality and grey/graysexuality

Proposal for a new car service station

Cílem této práce je vytvořit návrh nového autoservisu v nové lokalitě na základě stávajících zkušeností firmy. První část této práce tvoří rozbor stávající situace firmy, analýza stávajícího provozu, ekonomický průzkum v nové lokalitě a stanovení strategie pro vybudování nového servisu. Další, technická část, je zaměřena přímo na návrh nového provozu na základě výsledků analýz z první části. Následuje ekonomické zhodnocení navržené varianty.The aim of the diploma thesis is to create a proposal of a new car service station in a new lokality with regard to acquired experiences of the company. The first part of this work analyzes the current state in the company and current condition of a workshop. Together with that, it contains an economic research and put forward a strategy for the service station construction. The next, technical part, consists of the service station proposal with regard to outcomesin preceeding parts. Last part suggests an ekonomice valuation of the project.

Dyskusja nad sportem antycznym w czasopismach gimnastycznych w latach 1881–1914

The analysis of the gymnastic journalism shows a modest picture of knowledge about Greek agonistics. It can also be seen that Polish authors use antiquity rather casually in order to justify theses concerning their contemporary aims. As a result, the articles of some authors were not free from erroneous messages, which could have been avoided by using one of the popular books in Polish. Longer texts, presenting in-depth knowledge of Greek and Roman sport, were usually translations of texts by foreign researchers. At the same time, the gymnastic magazines do not contain any texts by scholars who taught ancient history at universities for Polish students.Analiza publicystki gimnastycznej wskazuje na skromny obraz wiedzy o agonistyce greckiej. Dostrzec także można, że rodzimi autorzy raczej zdawkowo posiłkowali się antykiem, aby uzasadnić tezy, które dotyczyły współczesnych im tendencji. W efekcie artykuły niektórych autorów nie były wolne od błędnych wiadomości, które można było skorygować, sięgając po jedno z popularnych opracowań wydanych w języku polskim. Teksty dłuższe, prezentujące pogłębioną znajomość sportu greckiego i rzymskiego, były tłumaczeniami tekstów badaczy zagranicznych. Równocześnie brakuje na łamach czasopism gimnastycznych jakichkolwiek tekstów osób, które wykładały historię starożytną na – wprawdzie nielicznych – uczelniach

Car lifts

Cílem této práce je vytvořit popis současného trhu v oblasti zdviží automobilů a porovnání vyráběných zdviží v závislosti na různých parametrech. Hlavní části této práce tvoří popis konstrukčních řešení zdviží automobilů, porovnání jednotlivých řešení podle vybraných hledisek a také popis konkrétně vyráběných zdviží dostupných na trhu.The aim of this work is to create a description of the current market for cars lifts and comparisons of currently produced car lifts depending on different parameters. The main part of this work is a description of the car lifts designs, comparing various aspects of the individual designs and desription of produced car lifts on the market.

Brytyjskie spektakle historyczne (pageants) 1905–1939. Stan i perspektywy badań

British historical pageants were extremely popular during the period 1905–1939. Despite the involvement of millions of British people as performers and audiences, it was not until the 1990s that they became the subject of research. The idea, organization and public perception attracted the attention of researchers. The subject of the article are selected research problems: Was the pageant an invention of Louis N. Parker? What role did these performances play in the life of the local community? Did these undertakings finally hold society together, or perhaps they caused social animosities? The database (The Redress of the Past: Historical Pageants in Britain) containing several hundred pageants and research perspectives resulting from its use is also discussed.Brytyjskie spektakle historyczne (pageants) były niezwykle popularne w okresie 1905–1939. Pomimo zaangażowania w nich milionów Brytyjczyków, zarówno jako wykonawców, jak i jako publiczności, dopiero od lat 90. XX wieku stały się tematem badań. Idea, organizacja i odbiór społeczny przyciągały uwagę badaczy. Tematem artykułu są wybrane problemy badawcze: czy pageant był wynalazkiem Louisa N. Parkera, jaką rolę odgrywały te spektakle w życiu lokalnej społeczności, a wreszcie czy te przedsięwzięcia spajały społeczeństwo czy może wywoływały animozje społeczne. Omówiono też bazę danych (The Redress of the Past: Historical Pageants in Britain) zawierającą kilkaset pageantów oraz perspektywy badawcze wynikające z jej wykorzystania

Median pro různé statistické metody

Median pro různé statistické metody Abstrakt: V této práci se zaměřujeme na využití robustních vlastností mediánu. Pro algoritmy, které jsou v práci navržené, zkoumáme jejich breakdown point, ale i další vlastnosti jako konsistenci (silnou nebo slabou), ekvivarianci a výpočetní složitost. Z praktických důvodů hledáme především metody, které se snaží najít rovnováhu mezi výpočetní složitostí a dobrými robustními vlastnostmi, protože tyto vlastnosti obvykle stojí proti sobě. Disertace je rozdělena do dvou částí. V první části navrhujeme robustní metody na bázi exponenciálního vyrovnávání. Nejprve zobecňujeme dřívější výsledky pro exponenciální vyrovnávání v absolutní normě s využitím. regresních kvantyů. Dále navrhu- jeme metodu založenou na znaménkovém testu, která se snaží vypořádat nejen s odlehlými pozorováními, ale i detekovat čas změny modelu. V druhé části navrhujeme nové odhady parametru polohy. Konstruujeme je tak, ze nejprve najdeme množinu robustních bodů okolo geometrického mediánu, tuto množiinu dále rozšiřujeme a z bodů této množiny počítáme iterativně vážený průměrr. Díky tomu získáme robustní odhad ve smyslu breakdown pointu, který využívá více informace z pozorovaných...Median in some statistical methods Abstract: This work is focused on utilization of robust properties of median. We propose variety of algorithms with respect to their breakdown point. In addition, other properties are studied such as consistency (strong or weak), equivariance and computational complexity. From practical point of view we are looking for methods balancing good robust properties and computational complexity, be- cause these two properties do not usually correspond to each other. The disser- tation is divided to two parts. In the first part, robust methods similar to the exponential smoothing are suggested. Firstly, the previous results for the exponential smoothing with ab- solute norm are generalized using the regression quantiles. Further, the method based on the classical sign test is introduced, which deals not only with outliers but also detects change points. In the second part we propose new estimators of location. These estimators select a robust set around the geometric median, enlarge it and compute the (iterative) weighted mean from it. In this way we obtain a robust estimator in the sense of the breakdown point which exploits more information from observations than standard estimators. We apply our approach on the concepts of boxplot and bagplot. We work in a general normed vector...Katedra pravděpodobnosti a matematické statistikyDepartment of Probability and Mathematical StatisticsFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Using Mentimeter in Online Book Clubs to Engage and Educate Extension Audiences

During the COVID-19 pandemic, Cooperative Extension professionals, like many others, were tasked with quickly adapting to accommodate limited face-to-face interactions. The pandemic necessitated that Extension educators leverage online resources to deliver tailored programming in informative and innovative ways while providing engaging, hands-on learning experiences. This article highlights two studies using Mentimeter as a tool to educate and engage Extension audiences through subsequent installments of an online book club. The presented case studies examine the processes and outcomes of a unique educational approach to Family and Consumer Sciences (FCS) in a non-traditional setting. The studies represent two distinct FCS disciplines: Family Finance & Resource Management and Food & Nutrition and demonstrate how audience response systems (ARS) like Mentimeter can be used to promote learner engagement

Interannual Variation in Diet and Condition in Juvenile Bluefish during Estuarine Residency

We examined the diets and weight-length relationships of juvenile bluefish Pomatomus saltatrix from Sandy Hook Bay, New Jersey, during 1981, 1983, and 1984. Diets consisted of a variety of polychaete, crustacean, and fish prey. Opossum shrimp Neomysis americana. sand shrimp Crangon septemspinosa, grass shrimp Palaemonetes vulgar is, bay anchovy Anchoa mitchilli, striped killifish Fundulus majalis. and Atlantic silverside Menidia menidia dominated the diet in terms of biomass and frequency of occurrence. Consumption of invertebrate and fish prey varied between years. Bluefish condition factor was highest in 1981, when fish were the predominant prey, and lower in 1983 and 1984, when the diets consisted mostly of invertebrate prey. The diets of juvenile bluefish in Sandy Hook Bay contained more invertebrate prey than has been described previously.Keywords: annual variations, diet, Pomatomus saltatrixKeywords: annual variations, diet, Pomatomus saltatri