Study of pressure losses in tubing and fittings Quarterly progress report, Dec. 1965 - Feb. 1966

Pressure losses in tubing and fittings - flow systems analysis, entrance effects in flexible metal hoses, and methods for analyzing flow over rough surfac

Evaluation of the Competitiveness of a Manufacturing Company

Předmětem této bakalářské práce je hodnocení konkurenceschopnosti výrobního podniku. Cílem této práce je provedení analýz makroprostředí a mikroprostředí podniku. V teoretické části práce jsou vymezeny základní pojmy a definice týkající se podniku a konkurence. Poté jsou popsány metody pro hodnocení konkurenceschopnosti výrobního podniku. V praktické části je nejprve představen vybraný podnik. Vnější okolí podniku je popsáno pomocí PEST analýzy a Porterovy analýzy pěti konkurenčních sil. Vnitřní okolí podniku je analyzováno pomocí analýzy vnitřního okolí podniku a finanční analýzy poměrovými ukazateli. Jako poslední je provedena SWOT analýza, která vychází z poznatků předešlých analýz. V závěru práce se nacházejí návrhy a doporučení jenž směřují k zvýšení konkurenceschopnosti podniku a jeho pozice na trhu.This bachelor thesis is focused on Evaluation of the Competitiveness of a Manufacturing Company. The aim of this thesis is to carry out the analysis of external and internal business environment. The theoretical part of the thesis defines the basic terms and definitions concerning the company and competition. After that are described the methods used for evaluating the competitiveness of the company. In the practical part there is firstly introduced the selected company. The external environment of the company is described using the PEST analysis and Porter five forces analysis. The internal environment of the company is analyzed using the analysis of the internal environment of the company and financial ratios. The last used method is a SWOT analysis, which is based on the of previous analyzes. In conclusion of the thesis are recommendations for increasing business competitiveness and it‘s position on the market.152 - Katedra podnikohospodářskávýborn

ERTS 1 launch and flight activation evaluation report, 23 - 26 July 1972. Launch through Orbit 35 and orbit adjust operation

The results of the analysis conducted on the telemetry data from the prelaunch, launch, and flight activation phases of the ERTS-1 spacecraft are presented. It is presented by sub system sections and provides for inter-relationships as they exist between the several subsystems. A brief statement of subsystem characteristics precedes flight evaluation statements. The appendix contains a total list of components flow on ERTS-1 and a complete listing of commands and telemetry functions for reference

Implementation of SMED with the TPM Elements

Diplomová práce se zabývá zkracováním časů při změnách přípravků na výrobních zařízení ve společnosti Senior Flexonics Czech s.r.o. V práci je základní seznámené se společností a výrobkem, kterého se zlepšení týká. Cílem práce je navržení nových časových postupů pro výměnu přípravků u dvou zařízení. V praktické části je hodnocení počátečního stavu před zlepšením, které bylo sledované v určitém období. Další kapitoly se zabývají analýzou původního stavu, nalezení problémů a navržení nových opatření. V poslední části je celkové shrnutí a přínos pro společnost.The Master Thesis deals shortening with times in Senior Flexonics Czech s.r.o. In the Thesis is basic introduction of the company and the product concreted by the improvement. The goal of this Thesis is to propose new time procedures for Exchange of products in two separate devices. In the practical part is evaluation of the initial state before the improvement,which was monitored in a certain period. The next chapters deal with analyzing the original state,finding problems and proposing new counter-measures. In the last part, there is a summary and contribution to society.345 - Katedra mechanické technologievýborn

Design of a Test Rig and its Testing Methods for Rotation and Expansion Performing Assemblies in Parabolic Trough Collector Power Plants

The present master’s thesis deals with the design of a new test rig for the investigation of durability and failure mechanisms of flexible pipe connections – so called Rotation and Expansion Performing Assemblies (REPAs) –, which are utilized in Parabolic Trough Collector power plants. Said assemblies compensate for the motion of the absorber tubes relative to the fixed piping of the header connection. The work focusses on the test rig’s design in view of a realistic simulation of all loads a REPA is exposed to in commercial applications. To achieve this, all possible requirements of the components, which are supposed to endure a lifetime of up to 30 years in power plants, are depicted. A literature research is carried out in order to investigate and evaluate existing test rigs for REPAs or their single components. By means of the findings, a specification sheet is derived. The test rig is composed of two main assemblies. On the one hand, a Kinematics Unit is used to reproduce the cyclic rotational and translational motions of a Parabolic Trough Collector. On the other hand, an HTF cycle (Heat Transfer Fluid cycle) conduces to set up pressure, temperature and flow rate circulating through the test specimens. The main part of the thesis contributes to the integration of the externally designed Kinematics Unit into the HTF cycle – taking into consideration realistic operation conditions and a complete and precise measurement of all parameters. Special emphasis is put on an accurate acquisition of the mechanical loads the test objects have to cope with. As a result of this work, a test rig is erected enabling realistic endurance tests of two serially connected REPAs in less than three months. The hydraulic properties are adjustable in terms of mass flow (6−60 m3/h), pressure (up to 40 bars) and temperature (up to 450 °C). The investigations can be tailored to customized applications of the REPA concept (Ball Joint Assemblies or Rotary Flex Hose Assemblies) and the collector geometry (e.g. focal length)

LANDSAT-2 launch and flight activation. Launch through orbit 50 and orbit adjust operation

The results of the analysis conducted on the telemetry data from the prelaunch, launch, and flight activation phases of LANDSAT-2 spacecraft are presented according to subsystems and interrelationships that exist between subsystems. Subsystem characteristics are included along with the flight evaluation results. Flight data are compared to baseline data established at the 20 C plateau during thermal vacuum testing of the spacecraft. Evaluation guidelines are derived from the specifications developed from the LANDSAT program objectives: (1) acquisition of multispectral images of the surface of the earth; and (2) use of the LANDSAT-2 receiving, frequency translating, and transmitting equipment as a relay system to gather data from fixed earth-based sensor platforms which are operated by individual investigators. Data are presented on the first 50 orbits of the spacecraft

Investigation of characteristics of feed system instabilities

The relationship between the structural and feed system natural frequencies in structure-propulsion system coupled longitudinal oscillations (pogo) is investigated. The feed system frequencies are usually very dependent upon the compressibility (compliance) of cavitation bubbles that exist to some extent in all operating turbopumps. This document includes: a complete review of cavitation mechanisms; development of a turbopump cavitation compliance model; an accumulation and analysis of all available cavitation compliance test data; and a correlation of empirical-analytical results. The analytical model is based on the analysis of flow relative to a set of cascaded blades, having any described shape, and assumes phase changes occur under conditions of isentropic equilibrium. Analytical cavitation compliance predictions for the J-2 LOX, F-1 LOX, H-1 LOX and LR87 oxidizer turbopump inducers do not compare favorably with test data. The model predicts much less cavitation than is derived from the test data. This implies that mechanisms other than blade cavitation contribute significantly to the total amount of turbopump cavitation

Estimates of Cl atom concentrations and hydrocarbon kinetic reactivity in surface air at Appledore Island, Maine (USA), during International Consortium for Atmospheric Research on Transport and Transformation/Chemistry of Halogens at the Isles of Shoals

Average hydroxyl radical (OH) to chlorine atom (Cl·) ratios ranging from 45 to 119 were determined from variability‐lifetime relationships for selected nonmethane hydrocarbons (NMHC) in surface air from six different transport sectors arriving at Appledore Island, Maine, during July 2004. Multiplying these ratios by an assumed average OH concentration of 2.5 × 106 cm−3 yielded estimates of Cl· concentrations of 2.2 to 5.6 × 104 cm−3. Summed reaction rates of methane and more than 30 abundant NMHCs with OH and Cl· suggest that Cl· reactions increased the kinetic reactivity of hydrocarbons by 16% to 30% over that due to OH alone in air associated with the various transport sectors. Isoprene and other abundant biogenic alkenes were the most important hydrocarbon contributors after methane to overall kinetic reactivity

For Our Information, January & February 1952, Vol. IV, no. 7-8

An official publication of the ILR School, Cornell University, “for the information of all faculty, staff and students.

For Our Information, January & February 1954, Vol. VI, no. 6-7

An official publication of the ILR School, Cornell University, “for the information of all faculty, staff and students.