Posts Tagged ‘water bottle safety’

Sinistral og dextral

August 13th, 2017

Sinistral og dextral er videnskabelige termer, som beskriver chiralitet (“håndethed”) eller relativ retning indenfor flere forskellige fagområder. Betegnelserne er afledt af de latinske ord for “venstre” (sinister) og “højre” (dexter). Andre fagområder anvender andre udtryk (så som dextro- og levorotation, inden for kemi, eller med og mod uret i fysik) eller bare venstre og højre (som indenfor anatomi)

Indenfor geologi anvendes termerne sinistral og dextral til at beskrive vandret bevægelse af blokke på hver side af en forkastningszone. Ordene anvendes således til at beskrive den relative retning for blokkenes bevægelse i forhold til hinanden, set oppefra small sports bottle. Bevægelsen betegnes som sinistral (venstredrejning), hvis blokken på modstående side flytter sig til venstre. Bevægelse i dextral retning (højredrejning), betyder at blokken på modstående side flytter sig mod højre.

Snegles skaller, sneglehuse, er asymmetrisk opviklet og beskrives ved fagtermen chiralitet, -“håndethed” af an asymmetrisk struktur.

Hovedparten af (over 90 %) af sneglearterne har et dextral (højredrejet) opviklet sneglehus, kun en mindre del af arterne har altid et sinistral (venstredrejet) goalkeeper gloves india, mens meget få arter består af begge typer (som f.eks. Amphidromus perversus)

Fladfisks er udover at de er flade også karakteriseret ved at de er assymetriske, da begge øjne er placeret på samme side af hovedet på den fuldvoksne fisk. I nogle grene af fladfiskearten water bottle safety, er øjnene altid på højre side af kroppen (dextral eller højre-øjet fladfisk) small fanny pack for running, og i andre grene er øjnene altid på venstre side (sinistral eller venstre-øjet fladfisk). De primitive spiny turboter omfatter et lige stort antal højre- og venstre- sidede individder, og er generelt mindre asymmetriske end de øvrige fladfisk-familier.

Brodek u Přerova

July 16th, 2017

Brodek u Přerova, bis 1948 Brodek (deutsch Brodek) ist eine Minderstadt in Tschechien. Sie liegt acht Kilometer nordwestlich von Přerov und gehört zum Okres Přerov.

Brodek u Přerova befindet sich im Hornomoravský úval (Obermährische Senke). Das Städtchen wird im Norden und Westen vom Bach Olešnice umflossen, der bei Citov in den Marcharm Morávka einmündet. Östlich erhebt sich der Stráž (215 m). Brodek liegt an der Staatsstraße II/150 zwischen Přerov und Prostějov sowie der Bahnstrecke Přerov – Olomouc.

Nachbarorte sind Majetín und Krčmaň im Norden, Hráza, Mladý Kaláb, Nelešovice und Kokory im Nordosten, Žeravice und Lapač im Osten, Předmostí und Luková im Südosten, Císařov und Citov im Süden, Věrovany, Rakodavy und Nenakonice im Südwesten, Dub nad Moravou im Westen sowie Bolelouc, Čertoryje und Charváty im Nordwesten.

Die älteste schriftliche Erwähnung von Brod erfolgte in der Mährischen Landtafel und ist datiert auf den 20. Mai 1301. Zwischen 1301 und 1305 gelangte das Dorf in den Besitz des Dominikanerinnenklosters Olmütz dry pak waterproof bags. In alten Überlieferungen wird Brod als ein Dorf an einer Furt durch die Jezda am Weg von Dub nach Přerov beschrieben. Daraus ist zu entnehmen, dass die Olešnice früher Jezda genannt wurde und ihr früherer Lauf offenbar entlang des heutigen Grabens durch den Ort führte. Seit 1536 wurde der Ort als Brodek, später in lateinischen Schriften als Brodeca und Brodeka (1771) bezeichnet. Das älteste Ortssiegel stammt von 1626; es zeigt die Patronin des Klosters, die hl. Katharina mit einem Palmwedel und Richtrad sowie darunter einen nach links springenden Hirsch. Die Matriken wurden ab 1629 in Přerov, ab 1700 in Kokory, ab 1784 in Citov und seit 1914 in Brodek geführt. Bis zur Aufhebung des Klosters der Dominikanerinnen an der Olmützer Katharinenkirche im Jahre 1782 gehörte Brodek stets zu den Besitzungen des Klosters. Entlang der Olešnice befand sich zwischen Brodek, Majetín und Kokory bis zum Ende des 18. Jahrhunderts ein System von Fischteichen.

Nach der Aufhebung der Patrimonialherrschaften bildete Brodek eine Gemeinde in der Bezirkshauptmannschaft Kremsier. Im Jahre 1855 wurde die Gemeinde dem Bezirk Prerau und 1868 wieder dem Bezirk Kremsier zugeordnet. Seit 1877 gehört das Dorf zum Okres Přerov. 1881 wurde die Schule eingeweiht. Am 29. April 1909 wurde Brodek durch Kaiser Franz Joseph zum Markt erhoben. Im 20. Jahrhundert wurde von der Olešnice ein Graben durch Brodek zur Zuckerfabrik geführt. 1926 entstand ein zweites Schulhaus. Den amtlichen Namenszusatz u Přerova führt die Gemeinde seit 1949. Seit 1951 besteht in Brodek die Glockengießerei der Familie Dytrych. Im Jahre 1976 wurden die Gemeinden Císařov und Luková dem Örtlichen Nationalausschuss (MNV) Brodek u Přerova anschlossen und 1983 gänzlich eingemeindet. Císařov löste sich 1990 wieder los. Anlässlich des 700. Ortsjubiläums wurde der Gemeinde im Jahre 2001 das Recht zur Führung eines Wappen und Banner bewilligt. Das Wappen ist dem historischen Gemeindesiegel von 1626 nachgestaltet. Seit dem 23. Januar 2009 besitzt Brodek u Přerova wieder den Status eines Městys. In Brodek u Přerova befindet sich eine Grundschule; in den Gebäuden der alten und neuen Schule werden die Kinder aus Brodek, Luková, Majetín, Citov und Císařov sowie zum Teil auch aus Rokytnice, Kokory und Krčmaň unterrichtet. Zu den bedeutendsten Unternehmen gehören die Glockengießerei Dytrych, die Malzfabrik Moravamalt, a.s., der Mineralwasserabfüller Hanácké závody, a.s. sowie eine Brückendirektion (Mostní obvod) der Staatsbahn. Zu Beginn des Jahres 2011 bestand der Ortsteil Brodek u Přerova aus 569 Häusern und hatte 1829 Einwohner.

Der Městys Brodek u Přerova besteht aus den Ortsteilen Brodek u Přerova (Brodek) und Luková (Lukowa).

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George Born

January 18th, 2017

George Henry Born (November 10, 1939 – January 21, 2016) was an American aerospace engineer, Distinguished Professor, founder and Director Emeritus of the Colorado Center for Astrodynamics Research (CCAR) at the University of Colorado Boulder. He is known for his work in satellite navigation and precise orbit determination. He worked on various missions while at the Jet Propulsion Laboratory as well as navigation support for the Apollo program in the late 1960s while at Johnson Space Center.

George Born was born on November 10, 1939 in a farm house in Westhoff, Texas. Son of Henry Born and Lydia Olga, he was the eighth of nine children. After age four, he was raised on various farms in Jackson County, Texas. In 1957, Born graduated as valedictorian of his class from Industrial High School in Vanderbilt, Texas. His freshman year of college, he attended Texas Lutheran College in Seguin. He then transferred to the University of Texas at Austin, where he completed his bachelor’s degree in Aerospace Engineering in 1962. After working for Ling-Temco-Vought Corporation in Dallas, he returned to University of Texas where he completed his doctorate in aerospace engineering in 1968 under the guidance of professor Byron Tapley, with whom he would later write a book on satellite navigation and orbit determination.

After completing his doctorate, Born spent two years as an aerospace technologist at the Manned Spacecraft Center at Johnson Space Center in Houston working on the Apollo program designing lunar orbits and providing navigation support. In 1970, he left JSC to work at the Jet Propulsion Laboratory in Pasadena, California. At JPL he worked on the Mariner 9 project as part of the Celestial Mechanics Team and contributed to the gravity field estimation of Mars and overall navigation efforts of the first spacecraft to ever orbit another planet. He was also part of the Viking program which landed two spacecraft on the surface of Mars and presented interesting navigational challenges.

While working on both Mariner 9 and Viking, Born was part of the optical navigation teams led by Tom Duxbury at JPL. He was the Technical Group Supervisor of the orbit determination group for the Viking Mars orbiters where the team used images of Phobos and Deimos for approach navigation in an operational setting. This was a first in interplanetary navigation. During these missions, the Viking 1 orbiter flew within 80 km of the surface of Phobos and the team was able to determine its mass and density, while the Viking 2 orbiter flew by Deimos within 26 km on October 17, 1977. The results of the Phobos Experiment Team, led by Robert Tolson of the Langley Research Center, were published in Science, 6 January 1978, vol 199.

Born also worked on orbit determination for Seasat where he served as Geophysical Evaluation Manager for the project. He was in charge of the efforts to demonstrate that the instrument package containing a radar altimeter, windfield scatterometer, synthetic aperture radar, scanning multichannel microwave radiometer, and a visual and infrared radiometer, met all specification for measuring geophysical parameters over the ocean. These included sea surface topography, sea surface temperature, atmospheric water vapor, and ocean surface imaging. This spacecraft flew the first suite of ocean-observing microwave sensors and required orbit determination solution uncertainties below 1 meter in satellite position. The spacecraft failed three months after launch but had returned a huge amount of data on global ocean winds, waves, currents and surface temperature. During this time, he also served as supervisor of the Precision Orbit Determination Group which was responsible for navigating Earth and interplanetary missions.

Born was instrumental in the design and implementation of the TOPEX/Poseidon oceanographic mission. This joint project between NASA and the French space agency CNES required the most precise orbit determination solutions to date and provided centimeter-level uncertainty in sea level measurements. TOPEX/Poseidon changed our understanding of the oceans and graphically depicted El Niño and La Niña as well as giving us data which allowed mapping of the global currents and circulation patterns for the first time. Walter Munk, one of the world’s foremost oceanographers, would call this mission “the most successful ocean experiment of all time.” Born would also be involved in the development of the Jason-1 and Jason-2 spacecraft, the successors to TOPEX/Poseidon.

During this time water bottle safety, Born was bestowed with several NASA awards and medals for his technical and managerial contributions. He left JPL in 1983 to focus on academic research.

In 1983, Born returned to the University of Texas at Austin as a senior research scientist at the Center for Space Research where he was engaged in teaching and research. In 1985, he accepted a position as professor of Aerospace Engineering Sciences at the University of Colorado Boulder. While at University of Colorado, he founded the Colorado Center for Astrodynamics Research (CCAR), the first research center established in the College of Engineering and Applied Sciences. Its research program emphasizes astrodynamics, space mission design and satellite navigation, GPS technology development and applications, meteorology, oceanography, geodesy, and terrestrial vegetation studies with in situ and remote sensing data. CCAR became internationally known for its contributions to spacecraft guidance, control, navigation, as well as remote sensing of the oceans and atmosphere with radar and lidar. He served as director of the research center for 28 years.

He taught graduate courses in statistical orbit determination, orbital mechanics, and interplanetary mission design. During his academic career he would form close and lasting relationships with many of his graduate students. Throughout these years of academic service, he served as Ph.D. advisor to over 40 students. Born had continued working on the TOPEX/Poseidon mission, which launched in August 1992 and continued monitoring the Earth’s oceans for thirteen years. Many of his graduate students’ dissertations were based on analysis of data from this mission.

Born continued working within the aerospace industry as a consultant for institutions and companies, including JPL, Naval Research Laboratory, General Electric, Kaman Sciences Corporation, Langley Research Center, The University of Texas at Austin, Stanford University and Ball Aerospace.

In 2015 thermos water bottle replacement parts, Born was named Distinguished Professor at the University of Colorado. He continued working until a few days before his death.

Born authored well over a hundred peer-reviewed papers as well as a textbook on statistical orbit determination. He served as guest editor for numerous special journal issues devoted to scientific and engineering results from the many missions he worked on, including TOPEX/Poseidon, Seasat and Jason-1. Additionally, Born was associate editor of the Journal of Marine Geodesy and astrodynamics editor of the Journal of the Astronautical Sciences.

Some of Born’s work include:

In July 1963, Born married Joy Evelyn Judd. They had one son and divorced in 1991. On March 21, 1992, he married Carol Ann Leslie. He was always grateful to Carol for her support and encouragement for all of his graduate students. Born was an avid skier, one of his favorite things about living in Colorado. He was also a big fan of the CU Buffs and had season tickets for the CU football team since 1985.

In 2008, Born was diagnosed with bronchiolitis obliterans, a rare and non-reversible lung disease . He died in Boulder, Colorado on January 21, 2016 from decaying lung conditions and congestive heart failure. He was 76.

Named in his honor, the George H. Born Honorary Scholarship Fund was started “to support students and research at the Colorado Center for Astrodynamics Research and the Department of Aerospace Engineering Sciences in the College of Engineering and Applied Sciences at CU Boulder.”

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