Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Sefer Avdiaj"'
Autor:
Isuf Tredhaku, Sefer Avdiaj
Publikováno v:
Emerging Materials Research. 11:313-318
Determination of the diffusion constant for specific cases can be achieved in different ways. One of them is by outgassing some gas in high vacuum from a solid body. In this paper, the diffusion constant of helium from ultralow expansion (ULE) glass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2083a1ff2dd1d536d890bfe75eff29ed
https://doi.org/10.1680/jemmr.22.00022
https://doi.org/10.1680/jemmr.22.00022
Autor:
Admir Omaj, Sefer Avdiaj, Veprim Thaçi, Rilinda Plakaj, Drinisa Gashi, Arianit A. Reka, Avni Berisha, Ardhmeri Alija
Publikováno v:
Open Chemistry, Vol 18, Iss 1, Pp 936-942 (2020)
This study is focused on the adsorption of hexavalent chromium ions Cr(vi) using graphene oxide (GO). The GO was prepared by chemical oxidation (Hummers method) of graphite particles. The synthesized GO adsorbent was characterized by Fourier transfor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7de6cf9ab766740f7e6449e5d5762279
https://doi.org/10.1515/chem-2020-0148
https://doi.org/10.1515/chem-2020-0148
Publikováno v:
Metrologia
Optical refractometry techniques enable realization of both pressure and temperature directly from properties of the gas. The NIST refractometer, a fixed length optical cavity (FLOC) has previously been evaluated for operation as pressure standard, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ec1f249e6e5ca0555ad8e84579ae184
https://europepmc.org/articles/PMC8384112/
https://europepmc.org/articles/PMC8384112/
Autor:
Sefer Avdiaj, Yllka Delija
Publikováno v:
ACTA IMEKO. 11:1
Generally, there are three primary methods in vacuum metrology: mercury manometer, static expansion method, and continuous expansion method. For the pressure below 10 Pa, the idea of the primary standard is that the gas is measured precisely at a pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b54ab470ad3d60b2a854545f2ebaab1
https://doi.org/10.21014/acta_imeko.v11i2.1153
https://doi.org/10.21014/acta_imeko.v11i2.1153
Publikováno v:
ACTA IMEKO. 11:1
In the new optical pressure standard Ultra-Low Expansion glass cavities were proposed to measure helium refractivity for a new realisation of the unit of pressure, pascal. However, it was noticed that the use of this type of material causes some diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3ff4aab170ce01c3773b997e3b3cf63
https://doi.org/10.21014/acta_imeko.v11i2.1155
https://doi.org/10.21014/acta_imeko.v11i2.1155
Autor:
Sefer Avdiaj, Julia Scherschligt, Perry Henderson, Daniel S. Barker, Ben Bowers, Stephen Eckel, James A. Fedchak, Scott O’Connell
We have measured the water and hydrogen outgassing rates of seven vacuum chambers of identical geometry but constructed of different materials and heat treatments. Chambers of five different materials were tested: 304L, 316L, and 316LN stainless stee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::185030de1a558c05b444b87bda7d8526
Autor:
Sefer Avdiaj, Janez Šetina
Publikováno v:
Measurement. 111:384-388
Gas flow was measured by using constant volume-variable pressure method. The gas flow is measured by pressure rise method using spinning rotor gauge (SRG). The design is relatively simple and has no precisely movable parts compared to the constant pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99efb0a18fde00e5dbb85b081abb4b9f
https://doi.org/10.1016/j.measurement.2017.08.004
https://doi.org/10.1016/j.measurement.2017.08.004
Publikováno v:
The Journal of chemical physics. 148(11)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cb7876b8c157d797c9683560712576f
https://pubmed.ncbi.nlm.nih.gov/29566506
https://pubmed.ncbi.nlm.nih.gov/29566506
Publikováno v:
MAPAN. 30:175-178
This paper presents a practical procedure for the determination and precision calibration of the volume ratio and absolute value of the volume of vacuum chamber by using static expansion method. Such systems for calculations of volume ratio consist f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::093c262887e9619a496ff408dc644ac1
https://doi.org/10.1007/s12647-015-0137-1
https://doi.org/10.1007/s12647-015-0137-1
Publikováno v:
Vacuum. 98:8-11
A variable leak valve (VLV) is used to a great extend to regulate throughput of process gases into the vacuum system. A gas flow through the VLV can be in different flow regimes: viscous, transition or molecular, depending on the upstream gas pressur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3aaec229116b36cdb9d1f86b8bb6ef19
https://doi.org/10.1016/j.vacuum.2012.09.018
https://doi.org/10.1016/j.vacuum.2012.09.018