Increase Productivity of Machinig Center at Machine-shop by Using Multiple Machine at Small Seriality

Import 23/07/2015Diplomová práce se zaměřuje na problém, kterým je zvýšení produktivity na středisku obrobna s využitím více strojových obsluh při malé sériovosti. Hlavní cíl zvyšování produktivity spočívá v tom, zda je možné zavést dvou strojovou obsluhu na CNC strojích typu SP 30 CNC č. 1, č. 2. V rámci druhotného cíle zvyšování produktivity na středisku obrobna a zájmu firmy byly z projektového hlediska navrhnuty a umístěny nové CNC stroje, sklad přípravků a materiálu, skříňky a kovové bedny k jednotlivým strojům, skříňky na osobní věci a navrhnout jídelní kout.This master thesis focuses on the problem of increasing machine shop productivity by using multimachine operation in small series production. More specifically, the primary thesis aim is to analyze options and feasibility of implementing multimachine operation of two CNC lathes SP 30 CNC to increase productivity. The secondary aim of machine shop productivity increasing in the interest of the company includes design of new CNC machines and their layout, a material and jigs warehouse, cabinets and metal crates for each of workplaces, personal lockers and a dining area.345 - Katedra mechanické technologievelmi dobř

Osteoarchaeological Studies of Human Systemic Stress of Early Urbanization in Late Shang at Anyang, China

<div><p>Through the analysis of human skeletal remains and mortuary practice in Yinxu, this study investigates the impact of early urbanization on the commoners during the Late Shang dynasty (ca. 1250–1046 B.C.). A total of 347 individuals examined in this study represent non-elites who were recovered from two different burial contexts (formally buried in lineage cemeteries and randomly scattered in refuse pits). Frequencies of enamel hypoplasia (childhood stress), <i>cribra orbitalia</i> (childhood stress and frailty) and osteoperiostitis (adult stress) were examined to assess systemic stress exposure. Our results reveal that there was no significant difference in the frequency of enamel hypoplasia between two burial groups and between sexes, suggesting these urban commoners experienced similar stresses during childhood, but significantly elevated levels of <i>cribra orbitalia</i> and osteoperiostitis were observed in the refuse pit female cohort. Theoretically, urbanization would have resulted in increased population density in the urban centre, declining sanitary conditions, and increased risk of resource shortage. Biologically, children would be more vulnerable to such physiological disturbance; as a result, high percentages of enamel hypoplasia (80.9% overall) and <i>cribra orbitalia</i> (30.3% overall) are observed in Yin commoners. Adults continued to suffer from stress, resulting in high frequencies of osteoperiostitis (40.0% total adults); in particular, in the refuse pit females who may also reflect a compound impact of gender inequality. Our data show that the non-elite urban population in the capital city of Late Shang Dynasty had experienced extensive stress exposure due to early urbanization with further social stratification only worsening the situation, and eventually contributing to collapse of the Shang Dynasty.</p></div

Frequency of osteoarthritis in major appendicular joints and osseous changes in the spine at Xin’anzhuang and Xiaomintun.

<p>Blue squares highlight differences with <i>P</i> values less than 0.05. Chart is based on the age-pooled crude prevalence; <i>P</i> value is from OR analysis.</p

Osteoperiostitis on medial surface of right tibial shaft of 2007AXAM101.

<p>Scale bar = 2cm.</p

Age-at-death distribution of skeletons by sex and burial type.^*

<p>Age-at-death distribution of skeletons by sex and burial type.^{<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0151854#t004fn001" target="_blank">*</a>}</p

<i>Cribra orbitalia</i> on the right orbit of 2007AXAM30.

<p>Scale bar = 1cm.</p

Frequency of osteoarthritis in males by site.

<p>Red squares highlight differences with <i>P</i> values less than 0.05. Chart is based on the age-pooled crude prevalence; <i>P</i> value is from OR analysis.</p

Age groups defined in this study.

<p>Age groups defined in this study.</p

Eburnation (arrows) on the left inferior cervical apophyseal facet (2007AXAM140).

<p>Scale bar = 1cm.</p

Age-at-death and sex distribution of the total sample.

<p>* * P = Perinatal.</p