Preliminary study of a new type of gas microstrip chamber on a sapphire substrate

Author(s):  
Yu.L. Grishkin ◽  
A.N. Martemyanov ◽  
A. Akindinov ◽  
M.M. Chumakov ◽  
O.I. Pogorelko ◽  
...  
2013 ◽  
Vol 750-752 ◽  
pp. 2191-2195
Author(s):  
Fu Gao ◽  
Ran Liu ◽  
Xing Juan Wang

MgAlON is a new type of refractory material. This article summarized the advantages and disadvantages of the preparative technique through different methods including aluminothermic reduction, carbothermal reduction-nitridation, reaction sintering, spark plasma sintering and so on. The future development was also discussed.


Author(s):  
Ren Yang ◽  
Steven Soper ◽  
Wanjun Wang

We report a new type of negative-tone photoresist in this paper. The resist is based on the composite of EPON resins 154 165 (both from Hexion Specialty Chemicals, Inc., Columbus, OH 43215). These two epoxy resins were mixed in an optimal ratio and dissolved into the gamma-butyrolactone (GBL) solvent. The mixture was then photosensitized by adding a given amount of triaryl sulfonium salt to obtain the new negative tone photoresist that can be used in for ultra high aspect ratio microstructures with UV lithography. The preliminary study has found that microstructures with height of more than 1000 μm and feature sizes of 10 μm (aspect-ratios of more than 100) can be obtained using the new resist film with ultraviolet lithography. The microstructures have excellent sidewall quality. In this paper, both the material properties and lithography properties of this new type of UV resist will be presented. The potential applications of the new resist in microfabrication and MEMS systems are also discussed.


2003 ◽  
Vol 6 (1) ◽  
pp. 14-19 ◽  
Author(s):  
T. Ozeki ◽  
T. Chinzei ◽  
Y. Abe ◽  
I. Saito ◽  
T. Isoyama ◽  
...  

1976 ◽  
Vol 98 (1) ◽  
pp. 15-22
Author(s):  
K. Yamanaka ◽  
K. Nagato

Recent papers describe that an airblast fuel atomizer is very effective for reducing emissions from a gas turbine and this type of fuel injector is being applied to practical engines. This paper deals with the new type of airblast fuel atomizer AFIT which comes from “Airblast Fuel Injection Tube” that makes fuel to break up into droplets by atomizing air at several small holes on the tube wall and fuel is well mixed with atomizing air instantly at the exits of holes. Regarding this AFIT, the fuel spray characteristics, combustion stability which is usually narrow for the combustor with an airblast fuel atomizer at lower engine speeds and exhaust emission levels are experimented and its effectiveness is discussed.


2017 ◽  
Vol 6 (6) ◽  
pp. 593
Author(s):  
Ersin Çelikbaş ◽  
Mevlüt Eliüşük

<p><strong>Abstract</strong></p><p>There is not so many scientific research on grave typology and tradition of burial in Paphlagonia region. In addition to this, there is not sufficient data on the history and culture of the region, which can be explained with the limited number of archaeological excavation in Paphlagonia region. Preliminary preparation for further far-reaching studies has been intended with this research on a piece of grave monument located in a yard at the south of Paphlagonia region, at the present time in Günesli village of Karabuk province. Even if this research is assesed as a preliminary study, the artefact we treat is of a high value in terms of grave typology of the region. The fact that there is Sora and Hadrianapolis in immediate environment of Gunesli village in which grave monument has been located suggests that it can be a small residential area subject to these ancient cities. However, there are no facts and figures to prove it. And yet, good craftsmanship in the artefact points out that the owner of the grave may be an important person.  The artefact is cubical as it stands. Man and wife and two Eros figures holding torch in both sides are portayed in a niche frontally encircled by columns. There is lion sculpture on the upper part of the artefact while Gorgon (medusa) is engraved on the other sides. Given the existent features of the artefact, it can be said that the artefact is unique to the region. A great number of rectangular and round graveyard columns have been found in the course of scientific works in the region. The existence of the clamp hole beneath the artefact shows that this artefact has been placed on such a pedestal. Stylistic features of the figures on the artefact have been examined and it has been dated to the 3<sup>rd</sup> century A.C.  At the end of this research a new type of grave has been added to the grave typology of Paphlagonia region and it has been proven how rich the grave typology of the region is.</p><p><strong>Öz</strong></p><p>Paphlagonia Bölgesi’nde mezar tipolojisi ve bu mezarlara yapılan gömü gelenekleri ile ilgili çok fazla bilimsel çalışma yapılmamıştır. Buna ek olarak bölgenin tarihi ve kültürü ile ilgili çok fazla veri de bulunmamaktadır ki bu durumu, bölgede arkeolojik kazıların sınırlı kalmasıyla açıklamak mümkündür. Paphlagonia Bölgesinin güneyinde günümüzde Karabük ili sınırları içerisinde kalan Güneşli Köyü’de bir bahçe içinde tespit edilen mezar anıtı parçası üzerine yaptığımız bu çalışmada ileride yapılacak geniş kapsamlı çalışmalara ön hazırlık yapılmaya çalışılmıştır. Bu çalışma bir ön hazırlık olarak değerlendirilse de ele aldığımız eser bölgenin mezar tipolojisi bakımından oldukça önemlidir. Mezar anıtının tespit edildiği Güneşli köyünün yakın çevresinde Sora ve Hadrianapolis antik kentlerinin varlığı olasılıkla köyün bu antik kentlere bağlı küçük bir yerleşim olabileceğini akla getirmektedir. Ancak bu durumu kesin kanıtlayacak kesin veriler bulunmamaktadır. Ancak eserde oldukça iyi işçilik mezar sahibinin önemli bir kişi olabileceğini de akla getirmektedir. Eser mevcut haliyle kübik bir şekil arz eder. Cephede sütunlarla çevrelenmiş bir niş içerisinde karıkoca ve onların her iki tarafında elinde meşale tutan iki eros betimlenmiştir. Diğer yüzlerde gorgo (medusa) işlenirken, eserin üst bölümünde kırık bir aslan heykeli vardır. Eserin mevcut özellikleri göz önüne alındığında eserin bölge için ünik olduğunu söylemek mümkündür. Bölgede yapılan bilimsel çalışmalarda çok sayıda dikdörtgen ve daire formlu mezar sütunları ele geçmiştir. Eserin altındaki zıvanın varlığı da bu eserin böyle bir kaide üzerine yerleştirildiğini göstermiştir. Eserde figürlerin stil özellikleri değerlendirilmiş ve M.S. 3 yüzyıla tarihlenmiştir. Bu çalışma sonucunda Paphlagonia Bölgesinin mezar tipolojisine yeni bir mezar türü daha eklenmiş ve bölgenin mezar tipolojisinin ne denli zengin olduğu ortaya koyulmuştur.</p>


1972 ◽  
Vol 50 (22) ◽  
pp. 2753-2755 ◽  
Author(s):  
P. A. Bélanger ◽  
R. Tremblay ◽  
J. Boivin ◽  
G. Otis

The characteristics of a TEA laser with a new type of electrode have been investigated in a preliminary study. The method used consisted of replacing the discrete discharge elements by smooth semiconducting plastic electrodes which allow good control of the discharge, greater injection of CO2, and greater excitation cross section than the discrete discharge elements, and produce a plasma with good optical properties.


2012 ◽  
Vol 60 (4) ◽  
pp. 501-509
Author(s):  
Eszter Patakiné Várkonyi ◽  
Gabriella Horváth ◽  
Nikoletta Sztán ◽  
Éva VÁradi ◽  
Judit Barna

Although cryopreservation of avian semen is only applicable for singlegene traits, cryopreservation of avian blastodermal cells could facilitate preservation of the entire genome of endangered or rare-breed poultry. Slow freezing methods result in acceptable survival rates; however, there are apparently no reports regarding the use of vitrification. The aim of the study was to establish methods for chicken embryonic cell vitrification, including development of a container which supported cryopreservation of large numbers of cells (to increase the probability of chimera production). Based on a preliminary study, vitrification seemed to be practical for avian blastodermal cell preservation. Pieces of mosquito net as carrier increased live cell rates compared to pellet form in media containing two macromolecules. Furthermore, we concluded that fetal calf serum in the vitrification medium could be replaced by polyvinylpyrrolidone, a chemically defined substance free of unwanted growth factors and potential pathogens.


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