Yeşil, Sertan

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Profile URL
https://hdl.handle.net/20.500.14411/6811
Name Variants
Yeşil,S.
Sertan Yeşil
Yesil, Sertan
S.,Yeşil
Sertan, Yeşil
Yesil,S.
S., Yesil
Yeil S.
Sertan, Yesil
Yesil,Sertan
S.,Yesil
S., Yeşil
Yeşil, Sertan
Y.,Sertan
Y., Sertan
Job Title
Doktor Öğretim Üyesi
Email Address
sertan.yesil@atilim.edu.tr
Main Affiliation
Chemical Engineering
Status
Website
ORCID ID
0000-0003-2284-1559
Scopus Author ID
12781090400
Turkish CoHE Profile ID
Google Scholar ID
VDU7keUAAAAJ
WoS Researcher ID
H-8544-2013

Sustainable Development Goals

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Scholarly Output

3

Articles

1

Citation Count

17

Supervised Theses

0

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2005 - 200922020 - 20241
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Now showing 1 - 3 of 3
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 5
    Gezgin & Gezgin-2: Adaptive Real-time İmage Processing Subsystems For Earth Observing Small Satellites
    (2006) Ismailoǧlu,N.; Benderli,O.; Yeşil,S.; Sever,R.; Okcan,B.; Şengül,O.; Öktem,R.; Chemical Engineering
    GEZGİN and GEZGİN-2 are real-time multi-spectral image processing subsystems developed for BİLSAT-1 and RASAT satellites respectively, the first two earth observing small satellites of Turkey, Main functionality of these subsystems is to compress in real-time multi-spectral images received concurrently from imagers, using JPEG2000 Image Compression algorithm. The compression features are controlled through user-supplied parameters uploaded in-orbit, so that the compression rate could be adapted to bandwidth, image quality and other mission requirements. GEZGİN employs both reconfigurable hardware and a DSP processor for image processing, where as the more advanced GEZGİN-2 contains full integration of the JPEG2000 processing path plus other image pre-processing features on reconfigurable hardware, hence offering increased performance and full re-configurability in orbit. Both systems demonstrate space-tailored architectures for implementing image processing functions where adaptability becomes the crucial issue determining robustness, flexibility and survivability of the system. © 2006 IEEE.
  • Thumbnail Image
    Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Flame Retarded Plasticized Poly(lactic Acid) Using Phosphorus-Based Additives
    (Sage Publications Ltd, 2024) Yesil, Sertan; Aytac, Ayse; Selim, Fatma; Chemical Engineering
    In this study, the synergistic effect of the flame-retardant additives on the properties of poly(lactic acid) (PLA) was investigated and at the same time, it was tried to increase the toughness of PLA by adding small amounts of phosphate-based additives to plasticized PLA as binary and ternary mixtures. Poly(ethylene glycol) (PEG) was used as a plasticizer. As flame retardant additives, ammonium polyphosphate (APP), tri-phenyl phosphate (TPP), and boron phosphate (BP) were used. Characterization of the composites was carried out by tensile test, impact test, differential scanning calorimetry (DSC), thermal gravimetric analyses (TGA), scanning electron microscopy (SEM), limiting oxygen index (LOI), and UL-94 horizontal burning tests. In addition, TGA-FTIR analyses were carried out to understand the thermal degradation mechanism of composites during combustion. According to the SEM micrographs of the burnt surfaces of the samples, a smooth and flat structure is observed in PLA/PEG/5TPP-5BP sample, while a porous structure and branching formations are observed in other composite samples. Among the composite samples, the best flame retardancy features were observed in the composite containing PLA/PEG/5APP-2.5TPP-2.5BP sample, and the highest impact strength and elongation at break values were obtained in the composite containing PLA/PEG/5APP-5TPP sample.
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 11
    Gezgi̇n-2: an Advanced Image Processing Subsystem for Earth-Observing Small Satellites
    (2005) Ismailoǧlu,N.; Benderli,O.; Yeşil,S.; Sever,R.; Okcan,B.; Öktem,R.; Chemical Engineering
    GEZGİN-2 is a real-time image processing subsystem, currently being developed for RASAT, the second small satellite to be launched by TÜBİTAK-BİLTEN, in 2007. It is an advanced version of the GEZCİN payload, implementing JPEG 2000 image compression algorithm and currently flying on the BİLSAT-1 satellite. The main enhancements in GEZGİN-2 are the integration of the full processing path of JPEG 2000 algorithm in a single Field Programmable Gate Array (FPGA) for increased processing performance and high speed data links complying with the ESA Spacewire standard, for data transfer at a rate of 100 Mbps. In addition to JPEG2000, GEZGIN-2 facilitates image pre-processing for cloud/sea detection and image/data encryption implemented on a daughter-board called GÖLGE. As in GEZGİN, GEZGİN-2 allows for adjustment of compression ratio for different mission times by means of run-time supplied parameters and full reconfigurability in orbit. © 2005 IEEE.