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A survey on communication protocols and performance evaluations for Internet of Things

Digital Communications and Networks 2022年第6期8卷 1094-1104页

作者： Cüneyt Bayılmış MAli Ebleme ÜnalÇavuşoğlu Kerem Küçük abdullah sevin Department of Computer Engineering Sakarya UniversitySerdivanSakaryaTurkey Institute of Natural Science Sakarya UniversitySakaryaTurkey Department of Software Engineering Sakarya UniversitySerdivanSakaryaTurkey Department of Software Engineering Kocaeli UniversityKocaeliTurkey

The Internet of Things (IoT) is a large-scale network of devices capable of sensing, data processing, and communicating with each other through different communication protocols. In today's technology ecosystem, IoT interacts with many application areas such as smart city, smart building, security, traffic, remote monitoring, health, energy, disaster, agriculture, industry. The IoT network in these scenarios comprises tiny devices, gateways, and cloud platforms. An IoT network is able to keep these fundamental components in transmission under many conditions with lightweight communication protocols taking into account the limited hardware features (memory, processor, energy, etc.) of tiny devices. These lightweight communication protocols affect the network traffic, reliability, bandwidth, and energy consumption of the IoT application. Therefore, determining the most proper communication protocol for application developers emerges as an important engineering problem. This paper presents a straightforward overview of the lightweight communication protocols, technological advancements in application layer for the IoT ecosystem. The survey then analyzes various recent lightweight communication protocols and reviews their strengths and limitations. In addition, the paper explains the experimental comparison of Constrained Applications Protocol (CoAP), Message Queuing Telemetry (MQTT), and WebSocket protocols, more convenient for tiny IoT devices. Finally, we discuss future research directions of communication protocols for IoT.

关键词： Internet of Things IoT application layer protocols IoT communicati on pr otocols Performance evaluation

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Surgical treatment of a rare brachial artery aneurysm postarteriovenous fistula closure after kidney transplant:A case report

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World Journal of Clinical Cases 2024年第21期12卷 4755-4761页

作者： Nahit Arda Demirkan Yasemin Keskin Hakan sevinç Ömer ArdaÇetinkaya Department of General Surgery Ankara University School of MedicineAnkara 06100Türkiye Department of General Surgery Dr.Abdurrahman Yurtaslan Ankara Oncology Training and Research HospitalAnkara 06100Türkiye

BACKGROUND Brachial artery aneurysms are defined as dilations greater than 50%of the normal diameter,which are rare among all peripheral arterial *** they are often present as pseudoaneurysms,true brachial artery aneurysms are also detected *** this case report,the surgical repair method of true brachial artery aneurysms,which is a rare condition,is *** SUMMARY Herein,we present a 61-year-old male patient with complaints of swelling and pain in the right arm antecubital region that had been progressing over 6 *** the diagnosis of a true brachial artery aneurysm associated with arteriovenous fistula,the aneurysm was surgically repaired with an autologous saphenous vein *** patient was discharged without any neurovascular complications *** True brachial artery aneurysms are rare and there are not any recommendations for their management in the current *** though the treatment of true aneurysms in this artery is primarily based on a surgical treatment,endovascular repair also might be an option.

关键词： Brachial artery aneurysm Arteriovenous fistula Kidney transplantation Surgical repair Autologous vein interposition Case report

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Empowering the community through participation and action in historic neighbourhood conservation planning

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Frontiers of Architectural Research 2022年第3期11卷 492-508页

作者： Anil Ataov Z.Ezgi Haliloglu Kahraman sevin Osmay City and Regional Planning Middle East Technical UniversityAnkaraTurkey City and Regional Planning £ankaya UniversityAnkaraTurkey

This paper presents an attempt to initiate community empowerment within the participatory neighbourhood upgrading context of the Sengul Hammam Neighbourhood(istiklal).We adopted the Participatory Action Research methodology,which aims to generate knowledge meaningful for the community towards upgrading and revitalizing the ***,a series of workshops,focus groups,and community activities were implemented in parallel processes with different neighbourhood *** order to change the situation in the neighbourhood,the inquiry began by mobilizing neighbourhood stakeholders and planning the future with primary school ***,this gained the active support of parents,women,the municipality,local leaders,and civil associations,and led them to take collective action over garbage collection,cleaning up the neighbourhood and building a *** mayor at the time of the research showed interest in istiklal but did not or could not give any financial or political support to upgrade the physical setting as a *** lack of support from the municipality in that regard and the neighbourhood being left to its own destiny caused a gradual dilapidation and loss of historic and cultural values.

关键词： Participation Empowerment Neighbourhood revitalization Conversation planning Participatory action research

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Crustal Architecture,Geochemistry and Geochronology of the Ophiolites and Ophiolitic Mélanges in Southeastern Anatolia

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 236-237页

作者： Ender SARIFAKIOGLU Yildirim DILEK Remzi AKSU Mustafa sevin General Directorate of Mineral Research&Exploration Geology Department Miami University Dept.of Geology and Env.Earth Science Turkish Petroleum Corporation

The Neotethyan ophiolites exposed in SE Anatolia–Syria occur along two,ENE-WSW-trending,sub-parallel belts(Fig.1).The ophiolites and ophiolitic mélanges in the southern belt include the Cretaceous K?z?lda?(Hatay),

关键词： ppm rock Crustal Architecture,Geochemistry and Geochronologyofthe Ophiolitesand Ophiolitic M langesin Southeastern Anatolia

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轻松学德语

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丛书名：轻松学外语系列

2013年

作者： (美)Dieter sevin (美)Ingrid sevin梁亮译

本书是针对德语初学者编写的，既可以用于德语专业一、二年级，也可用于其他德语学习者。本书是美国二外德语的教材，语言地道，形式多样，配有大量图片。本书为第八版，可见其受欢迎的程度。

ISBN: (纸本)9787301154502

关键词：德语

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Structural and Spectral (IR, NMR and UV/Visible) Properties of Newly Designed Boronic Acid Derivatives Containing DO3A Sensitive to Uranyl Ion: A DFT and TD-DFT Study

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Computational Chemistry 2017年第4期5卷 145-158页

作者： Kübra Sarikavak Fatma sevin Chemistry Department Faculty of Science Hacettepe University Ankara Turkey

In this study, the structural, electronic and optical properties of DO3A-based boronic acid derivates with and without UO22+ ion are studied by density functional calculations with M062X/6 - 31 g + (d) method, in aqueous media. The quantum chemical properties such as EHOMO, ELUMO, the energy gap (ΔE), chemical potential (μ), hardness (η) are also performed. The theoretical essential UV-Vis. bands of DO3A-UO2(VI)-APB-o are at 392 and 687 nm. DO3A-UO2 (VI)-ABB-o structure has two main bands at 393 and 650 nm. In general, the bathochromic shift occurs and the HOMO-LUMO energy gap decreases to about 2 eV, by binding UO22+ ion in three different media. The notable shifts in NMR spectrums have been found on α-carbon of carbonyl group, ring carbons and amide protons. In IR-spectrums, the prominent peaks belong to BO-H and N-H of amide stretching vibrations of calculated structures.

关键词： Uranium DO3A Benzimidazole DFT

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Evolution of Can-Etili(Canakkale-NW Turkey) lignite basin:Sedimentology,petrology,palynology and lignite characterization

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International Journal of Sediment Research 2015年第3期30卷 190-207页

作者： Mustafa Bozcu Funda Akgün Gülbin Gürdal Ayse Bozcu sevin Kapan Yesilyurt znur Karaca M.Serkan Akkiraz Canakkale Onsekiz Mart University Engineering FacultyDepartment of Geological Engineering Dokuz Eylül University Engineering Faculty.Department of Geological Engineering Dumlupmar University Engineering FacultyDepartment of Geological Engineering

This study examines the development and sedimentology of Can-Etili lignite basin in Biga Peninsula(NW Turkey) along with the palynologic and petrographic properties of the coals in this *** CanEtili lignite basin discordantly overlies Oligocene-aged Can *** basin consists of caldera type sedimentation developed by the combined effects of volcanism and *** volcanic rocks forming the basement of the basin consist of andesitic,dacitic and basaltic lava flows as well as agglomerates,tuff and silicified tuffs,and kaolin which is their alteration *** basement volcanic rocks cooled from high potassium and calc-alkaline *** trace element geochemistry of different rocks within the volcanics reveals that they are from a volcanic *** Can Formation contains lignites and consists of6 lithofacies representing alluvial,fluvial,marsh and lacustrine *** lithofacies are the lower volcanogenic conglomerate,the claystone,the lignite,the laminated organic claystone,the tuff intercalated sandstone-siltstone and the upper volcanogenic *** lignite in the basin is limnic and is formed in a non-fluvial marsh and marsh-lake *** abundant percentage of vegetation(Engelhardia,Sapotaceae,Cyrillaceae) is compatible with temperate and subtropical climatic conditions in the basin during sedimentation of *** coals of Can-Etili basin are humic with high sulfur content(6-6.5%average) mostly containing huminite compounds belonging to the class of lignitelow bituminous(C-A) *** coalification rank is between 0.38%and 0.56%*** coals are formed in limnic-limnotelmatic marsh zones based on their microlithotype *** inorganic components of the coal mostly consist of pyrite and *** trace elements,As,Th,U and V,are higher than international coal *** coal quality is adversely affected by high sulfur content and sulfur driven trace element *** lignite reserve(possible-proved)

关键词： Can-Etili basin(NW Turkey) Lignite Can formation Sedimentology Palinology

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Evaluation of early results of quick-chop phacoemulsification in the patients with high myopic cataract

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International Journal of Ophthalmology(English edition) 2014年第5期7卷 828-831页

作者： Ali Akal Tugba Goncu sevin Soker Cakmak Isa Yuvaci Mustafa Atas Süleyman Demircan Omer Faruk Yilmaz Department of Ophthalmology School of MedicineHarran University Department of Ophthalmology Kayseri Training and Research Hospital

AIM:To assess the early surgical outcomes of quickchop phacoemulsification technique in patients with high ***:The data of patients with high myopia who underwent quick-chop phacoemulsification were reviewed retrospectively. There were 42 eyes of 31 patients. The axial length was more than 26 mm in all eyes. All eyes underwent quick-chop phacoemulsification surgery with the placement of an intraocular lens(IOL) in the capsular bag. Postoperative visits were performed at 1, 3d; 2wk,1mo. Early postoperative best corrected visual acuity(BCVA), preoperative and postoperative corneal endothelial cell density(ECD), central corneal thickness(CCT) and postoperative complications were *** sample t-test or Wilcoxon tests were used to compare data between preoperative and postoperative data.· RESULTS:There was no statistically significant difference between preoperative and postoperative ECD and CCT. Retinal detachment was developed in one eye at postoperative first day. There was an iris prolapsus from side port insicion.· CONCLUSION:Quick-chop phacoemulsification technique is a safe surgical technique. However we can encounter some complications in high myopic eyes due to histopathological differences. Both side port and clear corneal tunnel insicion size is crucial for preventing postoperative complications. If any persistent leakage is noticed, suture should be placed.

关键词： high myopia cataract quick-chop phacoemulsification intraocular lens

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Theoretical Investigation of the Newly Designed Benzimidazole Based Metal Mediated DNA Base Couples with DFT Method

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Computational Chemistry 2017年第2期5卷 74-90页

作者： Fatma sevin Mostafa Asghari Dilmani Kubra Sarikavak Samira Farshbaf Jeddi Chemistry Department Faculty of ScienceHacettepe UniversityAnkaraTurkey

DNA has the genetic information storage and transmission capacity according to the sequential order of the monomer and creates a central role in the chemical evolution by copying itself with the proliferation feature. Watson-Crick base pairs define two base pairs with hydrogen bonds. If metal coordination bonds replace hydrogen bonds more stable alternative metallo-DNA sequence can be established. If the replication feature can be obtained for the metallo-DNA, this will greatly benefit the creation of DNA computer keys. In this study, a new type of benzimidazole based metallo-DNA sensors consisting of a connector unit that unsaturated azinil bridge linked to Watson-Crick base pairs with Ni2+, Hg2+, Zn2+, Ag+, Pt2+, Pd2+ metal cations and a benzimidazole has been designed. Absorption and emission spectrum of the newly designed aqua medium based fluorophore and their metallo-DNA sensors with selected cations have been theoretically investigated by using DFT method. The logic gates of selected possible sensors which response in the visible region have also been examined in detail in acidic and water phase. As a result of calculated absorption-emission spectrum data show that T-Hg-A-Bnz, A-Ni-T-Bnz, C-Pt-G-Bnz, C-Ni-C-Bnz complexes produce OR gate. T-Zn-T-Bnz and G-Pt-C-Bnz results demonstrated XOR and AND logic gate, respectively.

关键词： Flourescence Metallo-DNA Sensor Benzimidazole Logic Gates DFT

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The Role of C-Reactive Protein, Granulocyte Colony Stimulating Factor and Total Antioxidant Capacity in Diagnosis of Acute Appendicitis

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Surgical Science 2016年第3期7卷 177-180页

作者： Barış sevinç Ahmet Okuş Serden Ay Nergis Aksoy Recep Demirgül Department of General Surgery Sarιkaya State Hospital Yozgat Turkey Department of General Surgery Mevlana University Medical School Konya Turkey Department of General Surgery Malazgirt State Hospital Mus Turkey Department of General Surgery Konya Training and Research Hospital Konya Turkey

Background and Aim: Despite the fact that acute appendicitis is the most common surgical emergency all around the world, its diagnosis is still based on clinical evaluation and accuracy of the diagnosis depending on experience. The aim of this study is to evaluate the role of inflammatory markers in diagnosis of acute appendicitis. Material and Method: The study includes 77 cases with histopathologically proven acute appendicitis and 17 control cases. Blood samples were obtained from all cases and C-reactive protein (CRP), Granulocyte Colony Stimulating Factor (G-CSF) and Total Antioxidant Capacity (TAC) were measured. Findings: In cases with acute appendicitis, CRP and G-CSF levels were found to be related to acute appendicitis;however, TAC was not affected by the disease process. Moreover, CRP and G-CSF levels were correlated with the disease severity. Conclusion: Both CRP and G-CSF can be used in diagnosis of acute appendicitis. Furthermore, increased CRP level can be a marker to show advanced cases. However, G-CSF is not an effective marker to show disease severity.

关键词： Acute Appendicitis C-Reactive Protein Granulocyte Colony Stimulating Factor Total Anti-Oxidant Capacity

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