712 research outputs found
Impact of gas suspension shielding layer on the force effect of shock waves on a rigid wall
No full textП.Е. Беляев, Н.Л. Клиначева,
Южно-Уральский государственный университет, г. Челябинск, Российская Федерация
E-mail: [email protected]. P.E. Belyaev, N.L. Klinacheva
South Ural State University, Chelyabinsk, Russian Federation
E-mail: [email protected]Приводится анализ влияния параметров экранирующего слоя на величину импульса избыточного давления, передаваемого на жёсткую неподвижную стенку ударной волной. Показано, что уменьшение диаметра частиц в экранирующем слое приводит к замедлению оттока газа от преграды,
что, в свою очередь, приводит к увеличению импульса избыточного давления. На основе численного эксперимента выработаны предложения по повышению эффективности экранирования с учётом описанного эффекта. The article deals with the analysis of influence of shielding layer parameters on the amount of excessive
pressure impulse translated on the fixed rigid wall by the shock wave. It is demonstrated that the
decrease in the diameter of particles in shielding layer leads to gas drainage from the barrier, which in
turn leads to the increase of excessive pressure impulse. The suggestions on increasing the shielding
efficiency are made based on the numerical experiment and taking into account the described effect
Municipal resources for enhancing communication and Information services
No full textThis paper examines the norms and standards for using municipal resources. Managing resources forms part of internal procedures. the paper specifically analysis the strategies implemented for upholding municipal employees when using land line telephones the element of communication and information devices and services resources. Many of the local government related matters often address the blatant criminal acts such as theft, bribes, fraud in various forms and manipulation of tendering processes. This study found that misuse of communication and information devices and services resources may seem to be more subtle in nature. Yet, a municipal council remains vulnerable to resource misuse which often leads to significant direct loss to councils and gains to individuals and corporate bodies. Such conduct is unacceptable as it deprives the community whilst paying too much for the quantum and quality of services it is receiving. In this paper the author set out to do three things: the economic impact of resources misuse; the assess the policies; procedures and information and compliance mechanism instigated in regard to resource misuse; and seeks to recommend the methods that can be applied to curtail the dilemmas often encountered by municipal councils. The outcomes of this paper is realised by means of a qualitative analysis and is supported by interviews and a visit to the City of Johannesburg Metropolitan Municipality.http://www.google.co.za/url?url=http://ul.netd.ac.za/bitstream/handle/10386/1168/3rd%2520SAAPAM%2520LIMPOPO%2520CHAPTER%2520CONFERENCE%2520PROCEEDINGS.pdf%3Fsequence%3D1%26isAllowed%3Dy&rct=j&frm=1&q=&esrc=s&sa=U&ved=0ahUKEwi-_sH2-b3MAhVJfhoKHepPDKcQFggZMAE&usg=AFQjCNFCsZHR3VUZxXHSVXqMzv52CwqcH
Dethiobacteria class nov.
No full textDe.thi’o.bac.ter.i.a. N.L. masc. n. Dethiobacter, type genus of the type order of the class Dethiobacterales; N.L. neut. pl. n. suff. -ia, ending to denote a class; N.L. neut. pl. n. Dethiobacteria, class of the order Dethiobacterales.The class Dethiobacteria forms a deep-branching phylogenetic lineage in the phylum “Firmicutes D” (according to the GDTB classification) and includesobligately anaerobic haloalkaliphilic bacteria with respiratory metabolism from soda lakes. It consists of a single order Dethiobacterales, family Dethiobacteraceae,and genus Dethiobacter.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Environmental Biotechnolog
A story about the discovery of the largest glacier and the highest peak in heart of the Pamirs
No full textThe paper tells a story how the “blank spot” at the Pamirs center was puzzled out. In 1878, a small party of explorers headed by V.D. Oshanin had found here a big glacier about 30–40 km long and named it for Fedchenko. In 1884–85, known investigator G.E. Grumm-Grzhimailo made his important proposal about orographic structure of the Pamirs central part. In 1890, expedition headed by topographer N.I. Kosinenko investigated the lower part of the Fedchenko Glacier and, for the first time, saw a separate high peak. In 1916, astronomer Ya.I. Belyaev had put on a map a great pyramidal summit but he had mistaken it for the Garmo Peak well known to local Tadzhiks (Fig. 2).In 1927, N.L. Korzhenevsky published a chart of arrangement of ridges near sources of the river Muksu (Fig. 3) that became a basis for work of the Tadzhik-Pamir expedition of 1928–1932. In 1928, Ya.I. Belyaev determined a true length of the Fechenko Glacier that was 70 km, and geodesist I.G. Dorofeevmapped the whole basin of this glacier (Fig. 4) including also a high irregular truncated pyramid of 7495 m in height (as he believed). But earlier this summit was identified as known the Garmo Peak. And only in 1932, it was established that definitions made by Dorofeev in 1928 were related to this highest peak of the Pamirs and also of the whole Soviet Union. The chart of real Central Pamir orography constructed by I.G. Dorofeev is presented in the paper together with his letter addressed to the author (Fig. 5).Thus, the “Garmo peaks” which were observed by the above mentioned explorers were actually three different summits. One of them does tower on the north of the “knot being puzzled out” and reaches 7495 m, and namely this “one-tooth” peak was repeatedly seen by N.V. Krylenko from valleys Gando and Garmo. It was named then the Stalin peak, and later – the peak of Communism. Another one is located in 18 km southward, and this peak is actually the true Garmo Peak 6595 m high known to local Tadzhik people. And the third summit is located between the two others, it is the Belyaev Peak 6852 m high that once Ya.I. Belyaev, and next N.L. Korzhenevsky confused as the Garmo Peak.So, at the beginning of 1930s, orography of the Central Pamirs had been finally ascertained. A group of distinguished well-known scientists and travelers of the first third of 20th century (Fig. 7) participated in this outstanding investigation that was followed by a number of geographical discoveries. And, the highest peak of the Pamirs does now bear the name Ismoil Somoni (Fig. 8)
Natrarchaeobaculum
No full textNatr. ar. chae. o. ba' cu. lum. N.L. neut. n. natron, soda, sodium carbonate (arbitrarily derived from Arabic n. natrun or natron) ; N.L. pref. natro- pertaining to soda; Gr. masc. adj. archaîos ancient; L. neut. n. baculum, small stick, rod; N.L. neut. n. Natrarchaeobaculum soda-loving archaeal rod.The genus Natrarchaeobaculum is classified as a member of the family Natrialbaceae, order Natrialbales, class Halobacteria according to phylogenomic analyses. It includes extremely halophilic heterotrophic natronoarchaea, some of which can grow anaerobically by sulfur respiration utilizing organic acids, H2 and formate as the electron donors. The genus currently includes two species: the facultatively anaerobic type species Natrarchaeobaculum sulfurireducens and the aerobic species Natrarchaeobaculum aegyptiacus. Inhabits hypersaline soda lakes. The DNA G + C content is 62.8-64.1 % (genome sequence). Three letter abbreviation is Nab. Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Environmental Biotechnolog
Natronoflexus
No full textNa.tro.no.fle’xus; N.L. neut. n. natron (arbitrarily derived from the Arabic n. natrun or natron) soda, sodium carbonate; N.L. pref. natrono-, pertaining to soda; L. masc. n. flexus, a bending, N.L. masc. n. Natronoflexus, bending/flexible cells living in soda. The genus Natronoflexus is a member of the family Marinilabiliaceae, order Bacteroidales, class Bacteroidia, and phylum Bacteroidota. It is an obligately anaerobic fermentative saccharolytic bacterium with the ability to utilize polygalacturonates and xylan as carbon and energy sources. The only species of the genus, N. pectinivorans, is a moderately salt-tolerant, chloride-independent obligate alkaliphile found in soda lakes in Central Asia. The DNA G+C content is 39.6mol% (genome). DNA G +C content (%): 39.6 (genome). Type species: Natronoflexus pectinivorans Sorokin et al. 2011, VL144.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Environmental Biotechnolog
Het idee van de Hollandse stad: Stedebouw in Nederland 1900-1930 met de internationale voorgeschiedenis
No full textArchitectureArchitectur
Dethiobacteraceae fam. nov.
No full textDe.thi’o.bac.ter.a.ce.a.e. N.L. masc. n. Dethiobacter, the type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Dethiobacteraceae, the family of the genus Dethiobacter. The family Dethiobacteraceae includes obligately anaerobic, moderately salt-tolerant, and obligately alkaliphilic bacteria able to grow chemolithoautotrophically by elemental sulfur disproportionation and fixingCO2 by the Wood–Ljungdahl pathway. The two strains currently known in pure culture are both isolated from saline soda lakes. H2 can serve as an additionalelectron donor for sulfur and thiosulfate reduction. The family consists of a single genus Dethiobacter with the type species Dethiobacter alkaliphilus. DNA G +C content (%): 48.3–48.5 (genomes of two isolates). Type genus: Dethiobacter Sorokin et al. 2008, VL123.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work publicBT/Environmental Biotechnolog
Natronospira
No full textNa.tro.no.spi’ra. N.L. neut. n. natron (arbitrarily derived from the Arabic n. natrun or natron), soda; L. fem. n. spira, coil; N.L. fem. n. Natronospira, a soda-loving coil-shaped bacterium.The genus Natronospira was originally classified as a member of the family Ectothiorhodospiraceae, order Chromatiales, and class Gammaproteobacteria, according to the 16S rRNA-based gene sequence comparison, while according to the phylogenomic analysis it forms a separate order-level branch within the Gammaproteobacteria unrelated to the Chromatiales members. It is an aerobic heterotroph that preferably utilizes proteins and peptides for growth. Natronospira is an extremely salt-tolerant, chloride-independent obligate alkaliphile. It inhabits oxic brines of hypersaline soda lakes, particularly in southwestern Siberia. The genus currently includes a single (type) species:N. proteinivora. DNA G +C content (%): 59.8 (genome). Type species: Natronospira proteinivora Sorokin et al. 2017VP.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work publicBT/Environmental Biotechnolog
Submission to the Commission of Inquiry into Newfoundland Transportation from the Corner Brook Chamber of Commerce and the Corner Brook Development Corporation Limited of the City of Corner Brook
No full textThe Corner Brook Chamber of Commerce, The City of Corner BrookIntroduction. The origin of the brief -- Transportation and economic development -- Economic change and social change -- The provincial context: the two port proposal. The rationale of the proposal -- The implications of the proposal -- The sea mode. Port infrastructure -- Corner Brook - Montreal: direct water link -- Corner Brook and the coastal boat service -- A direct link to mainland markets -- The surface mode. The railway -- The trucking industry -- Road cruiser service -- Gulf passenger ferry service -- The air mode. Regional and national air carrier services -- Third level air carrier services -- Summary and conclusionHandwritten notes in margins; Title from cove
- …
