Analysis of intrusion prevention methods

Thesis (Master)--Izmir Institute of Technology, Computer Engineering, Izmir, 2004Includes bibliographical references (leaves: 105-108)Text in English; Abstract: Turkish and Englishviii, 108 leavesToday, the pace of the technological development and improvements has compelled the development of new and more complex applications. The obligatory of application development in a short time to rapidly changing requirements causes skipping of some stages, mostly the testing stage, in the software development cycle thus, leads to the production of applications with defects. These defects are, later, discovered by intruders to be used to penetrate into computer systems. Current security technologies, such as firewalls, intrusion detection systems, honeypots, network-based antivirus systems, are insufficient to protect systems against those, continuously increasing and rapid-spreading attacks. Intrusion Prevention System (IPS) is a new technology developed to block today.s application-specific, data-driven attacks that spread in the speed of communication. IPS is the evolved and integrated state of the existing technologies; it is not a new approach to network security. In this thesis, IPS products of various computer security appliance developer companies have been analyzed in details. At the end of these analyses, the requirements of network-based IPSs have been identified and an architecture that fits those requirements has been proposed. Also, a sample network-based IPS has been developed by modifying the open source application Snort

Analysis of intrusion prevention methods

Thesis (Master)--Izmir Institute of Technology, Computer Engineering, Izmir, 2004Includes bibliographical references (leaves: 105-108)Text in English; Abstract: Turkish and Englishviii, 108 leavesToday, the pace of the technological development and improvements has compelled the development of new and more complex applications. The obligatory of application development in a short time to rapidly changing requirements causes skipping of some stages, mostly the testing stage, in the software development cycle thus, leads to the production of applications with defects. These defects are, later, discovered by intruders to be used to penetrate into computer systems. Current security technologies, such as firewalls, intrusion detection systems, honeypots, network-based antivirus systems, are insufficient to protect systems against those, continuously increasing and rapid-spreading attacks. Intrusion Prevention System (IPS) is a new technology developed to block today.s application-specific, data-driven attacks that spread in the speed of communication. IPS is the evolved and integrated state of the existing technologies; it is not a new approach to network security. In this thesis, IPS products of various computer security appliance developer companies have been analyzed in details. At the end of these analyses, the requirements of network-based IPSs have been identified and an architecture that fits those requirements has been proposed. Also, a sample network-based IPS has been developed by modifying the open source application Snort

Synthesis and characterization of new Ag(I) coordination networks based on saccharinate and bis(isopropylimidazole) ligands exhibiting very close C-H...Ag interactions

Two Ag(l) coordination networks, formulated as [Ag(sac)(mu-bisopib)](n) (1) and [Ag(sac)(mu-pbisopix)].H2O (2), have been synthesized based on the bis(isopropylimidazole) ligands 1,4-bis(2-isopropyl-1H-imidazol-1-yl)butane (bisopib) and 1,4-bis((2-isopropyl-1H-imidazol-1-yl)methyl)benzene (pbisopix), respectively, along with saccharinate (sac) ligands. All the complexes were characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction studies. The X-ray crystallographic studies of 1 and 2 revealed that the Ag(I) ions are mu-bridged by the bis(isopropylimidazole) derivative ligands to generate 1D zig-zag polymer and dinuclear structures, respectively. As far as we know, complex I shows the closest C-H...Ag interaction distance among similar literature examples. In complex 1 adjacent 1D coordination polymers are further joined by C-H...O hydrogen bonds and pi...pi interactions, generating a 3D supramolecular network. The C-H...O hydrogen bonds and C-H...pi interactions play a crucial role in the architecture of the 3D network of complex 2. Thermal decompositions and photoluminescent properties of the Ag(I) complexes are also discussed herein. (C) 2016 Elsevier Ltd. All rights reserved.WOS:0003940633000362-s2.0-8500818779

Looking at the Young Through the Eyes of Fortune Tellers: A Question on Young People Going to Fortune Cafes Evaluation

This study basically tried to understand how young people approach to fortune-telling behavior. The data obtained from 13 fortune-tellers through in-depth interviews were classified under 4 themes: which profile young people go to fortune-tellers, what young people talk about with fortune-tellers, young people's expectations from fortune-tellers, and fortune-tellers' place in the world of young people. Accordingly, while there is a sociodemograp-hically diverse profile among young people who go to fortune-tellers, it has been determined that young people who are defined as anxious, curious and depressed come to the fore. On the other hand, it has been determined that young people usually conduct interviews with fortune-tellers on love relationships, family problems, future concerns and career. Besides, according to fortune-tellers, young people go to fortune-tellers to satisfy their curiosity, to consult, to be approved, and to talk. In addition, it has been understood that fortune tellers are important and influential people in the lives of young people. The data obtained suggest that fortune-telling behavior can be seen as an expression of young people seeking counseling and psychological support. Therefore, it points out the importance of effective youth work that will meet the needs of young people in this direction

Oxalamide-Functionalized Metal Organic Frameworks for CO2 Adsorption

Metal-organic frameworks (MOFs) have received great attention in recent years as potential adsorbents for CO2 capture due to their unique properties. However, the high cost and their tedious synthesis procedures impede their industrial application. A series of new CO2-philic oxalamide-functionalized MOFs have been solvothermally synthesized: {[Zn-3(mu(8)-OATA)(1.5)(H2O)(2)(DMF)]center dot 5/2H(2)O center dot 5DMF}(n) (Zn-OATA), {[NH2(CH3)(2)][Cd(mu(4)-HOATA)]center dot H2O center dot DMF}(n) (Cd-OATA), and {[Co-2(mu(7)-OATA)(H2O)(DMF)(2)]center dot 2H(2)O center dot 3DMF}(n) (Co-OATA) (H(4)OATA = N,N'-bis(3,5-dicarboxyphenyl)oxalamide). In Zn-OATA, the [Zn-2(CO2)(4)] SBUs are connected by OATA(4-) ligands into a 3D framework with 4-connected NbO topology. In Cd-OATA, two anionic frameworks with a dia topology interpenetrated each other to form a porous structure. In Co-OATA, [Co-2(CO2)(4)] units are linked by four OATA(4-) to form a 3D framework with binodal 4,4-connected 4(2)center dot 8(4) PtS-type topology. Very interestingly, Cu-OATA can be prepared from Zn-OATA by a facile metal ions exchange procedure without damaging the structure while the CO2 adsorption ability can be largely enhanced when Zn(II) metal ions are exchanged to Cu(II). These new MOFs possess channels decorated by the CO2-philic oxalamide groups and accessible open metal sites, suitable for highly selective CO2 adsorption. Cu-OATA exhibits a significant CO2 adsorption capacity of 25.35 wt % (138.85 cm(3)/g) at 273 K and 9.84 wt % (50.08 cm(3)/g) at 298 K under 1 bar with isosteric heat of adsorption (Qst) of about 25 kJ/mol. Cu-OATA presents a very high selectivity of 5.5 for CO2/CH4 and 43.8 for CO2/N-2 separation at 0.1 bar, 298 K. Cd-OATA exhibits a CO2 sorption isotherm with hysteresis that can be originated from structural rearrangements. Cd-OATA adsorbs CO2 up to 11.90 wt % (60.58 cm(3)/g) at 273 K and 2.26 wt % (11.40 cm(3)/g) at 298 K under 1 bar. Moreover, these new MOFs exhibit high stability in various organic solvents, water, and acidic or basic media. The present work opens a new opportunity in the development of improved and cost-effective MOF adsorbents for highly efficient CO2 capture.YScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [215Z252]; Changjiang Scholars and Innovative Research Team in University of the Chinese Ministry of EducationProgram for Changjiang Scholars & Innovative Research Team in University (PCSIRT) [IRT_15R52]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [NSFC-U1663225]; Ministry of Science and Technology [B20002]; Ministry of Education of ChinaMinistry of Education, China; project DepollutAir of the EU program Interreg V France-Wallonie-VlaanderenThis work has been supported by The Scientific and Technological Research Council of Turkey (TUBITAK) (Project No. 215Z252). The authors would like to acknowledge Dr. Tug.ce Gunay Semerci for her helpful discussions and comments. This work is also financially supported by Changjiang Scholars and Innovative Research Team in University (IRT_15R52) of the Chinese Ministry of Education, the National Natural Science Foundation of China (NSFC-U1663225), Program of Introducing Talents of Discipline to Universities-Plan 111 (Grant No. B20002) from the Ministry of Science and Technology and the Ministry of Education of China, and the project DepollutAir of the EU program Interreg V France-Wallonie-Vlaanderen.WOS:000677540900055PubMed: 3425118