Survey on economics of information security

Economics of information security has recently become a rapidly growing field of research that is vitally important for managing the decisions and behaviors in cyberspace security. This field provides valuable insights not only for security experts, but also for policy makers, business managers, economists and psychologists.In this paper, we are going to discuss the emergence and evolution of economics of information security; where it came from, where it is today and its future directions. Research conducted for this survey explores the literature on economic issues in information security and review the advantages, drawbacks, and future research directions to set the scene that the assessment and analysis of the economics of information security publications followed it. Furthermore, we provide a structured discussion and overview of selected sets of works and highlight the models and theories in this field by organizing the presented works into six main categories namely information security investment, trust and privacy, network security, malicious program and malware economics, penetration testing and digital forensics and software security. Additionally, this survey aims to familiarize readers with major areas of this field already in hand to indicate the gaps and overlooked issues in the economics of security

総合失調症患者における転倒とバランスの関連 : 予備的前向きコホート研究

内容の要旨, 審査の要旨広島大学(Hiroshima University)博士(保健学)Doctor of Philosophy in Health Sciencedoctora

An investigation of the secure data communication in medical mobile applications

Nowadays, medical applications (apps) have become a rapidly growing and basic tool in medical education, patient care and clinical research that are vitally important to aware people with a health signal. Similar to other sorts of telecommunication and Internet applications, the medical apps are vulnerable against attackers or unauthorized interceptions. An encryption is a common way to provide the privacy of medical application users. In this paper, we examine ten popular medical applications and analyze the intercepted communication to determine the encryption of captured packets and text communications based on obtained results

Automated determination of cardiac rest period on whole-heart coronary magnetic resonance angiography by extracting high-speed motion of coronary arteries

13301乙第2094号博士（保健学）金沢大学博士論文本文Full 以下に掲載：Clinical Imaging 52 Nov-Dec pp.183-188 2018. Elsevier. 共著者：Hiroya Asou, Naoyuki Imada, Yuichi Nishiyama, Tomoyasu Sato, Katsuhiro Ichikaw

Targeting PI3Kδ and PI3Kγ signalling disrupts human AML survival and bone marrow stromal cell mediated protection

Phosphoinositide-3-kinase (PI3K) is an enzyme group, known to regulate key survival pathways in acute myeloid leukaemia (AML). It generates phosphatidylinositol-3,4,5-triphosphate, which provides a membrane docking site for protein kinaseB activation. PI3K catalytic p110 subunits are divided into 4 isoforms; α,β,δ and γ. The PI3Kδ isoform is always expressed in AML cells, whereas the frequency of PI3Kγ expression is highly variable. The functions of these individual catalytic enzymes have not been fully resolved in AML, therefore using the PI3K p110δ and p110γ-targeted inhibitor IPI-145 (duvelisib) and specific p110δ and p110γ shRNA, we analysed the role of these two p110 subunits in human AML blast survival. The results show that PI3Kδ and PI3Kγ inhibition with IPI-145 has anti-proliferative activity in primary AML cells by inhibiting the activity of AKT and MAPK. Pre-treatment of AML cells with IPI-145 inhibits both adhesion and migration of AML blasts to bone marrow stromal cells. Using shRNA targeted to the individual isoforms we demonstrated that p110δ-knockdown had a more significant anti-proliferative effect on AML cells, whereas targeting p110γ-knockdown significantly inhibited AML migration. The results demonstrate that targeting both PI3Kδ and PI3Kγ to inhibit AML-BMSC interactions provides a biologic rationale for the pre-clinical evaluation of IPI-145 in AML

Pivotal role of Sirt6 in the crosstalk among ageing, metabolic syndrome and osteoarthritis

AbstractOsteoarthritis (OA) is a chronic degenerative joint disorder commonly associated with metabolic syndrome. As ageing and obesity has a great impact on the initiation/severity of OA, herein we sought to investigate the involvement of Sirt6 in the crosstalk between ageing and metabolic syndrome/OA. Sirt6 haploinsufficiency in mice promoted the expression of inflammatory cytokines in the IPFP. Enhanced inflammation of the IPFP in the aged Sirt6 ± HFD group was paralleled with accelerated OA change, including osteophyte growth and chondrocyte hypertrophy. Conversely, mesenchyme-specific Sirt6-deficient mice revealed both attenuated chondrocyte hypertrophy and proteoglycan synthesis, although chondrocyte senescence was enhanced as shown in the aged WT mice. Thus Sirt6 has key roles in the relationship among ageing, metabolic syndrome, and OA

Consideration about Masagorou Sunaga and Hatsu Sunaga’s Certificates of Graduation

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Platelet Serotonin (5-HT)2A Receptor Binding Sites in Affective Disorders: A Quantitative Receptor Autoradiographic Study with [ 125I ] Lysergic Acid Diethylamide

We used the quantitative receptor autoradiographic method with a radioligand of [ 125I ]lysergic acid diethylamide ([125I]LSD) to quantitate platelet serotonin (5-HT)2A receptors in affective disorders. Specific binding of [125I]LSD to human platelet pellet sections was saturable, and of high affinity and single. Both ketanserin and spiperone, 5-HT2A selective ligands, inhibited [125I]LSD binding to human platelet pellets with high potency (IC50 values of 0.15 and 0.19 nM, respectively), whereas 5-HT and paroxetine, selective 5- HT re-uptake inhibitors, inhibited binding with a very low potency. These data confirmed that binding sites of human platelet pellets specifically labelled by [125I] LSD were 5-HT2A receptors. The number of 5-HT2A receptors (Bmax of [ 125I] LSD binding) of human platelets obtained from drug-free depressed patients was significantly higher than those of healthy volunteers. There were no statistical differences in the number of 5-HT2A receptors between depressed patients with and without suicidal behaviors. The increased number in platelet 5-HT2A receptotrs may indicate a hyperfunction of the central 5-HT2A receptors. The method with human platelets pellet sections we used is simple and sensitive for investigating platelet 5-HT2A receptors, a diagnostic and therapeutic marker in depressive disorders, in the clinical research

Haploinsufficiency of SAMD9L, an Endosome Fusion Facilitator, Causes Myeloid Malignancies in Mice Mimicking Human Diseases with Monosomy 7

SummaryMonosomy 7 and interstitial deletion of 7q (−7/7q−) are well-recognized nonrandom chromosomal abnormalities frequently found among patients with myelodysplastic syndromes (MDSs) and myeloid leukemias. We previously identified candidate myeloid tumor suppressor genes (SAMD9, SAMD9-like = SAMD9L, and Miki) in the 7q21.3 subband. We established SAMD9L-deficient mice and found that SAMD9L+/− mice as well as SAMD9L−/− mice develop myeloid diseases resembling human diseases associated with −7/7q−. SAMD9L-deficient hematopoietic stem cells showed enhanced colony formation potential and in vivo reconstitution ability. SAMD9L localizes in early endosomes. SAMD9L-deficient cells showed delays in homotypic endosome fusion, resulting in persistence of ligand-bound cytokine receptors. These findings suggest that haploinsufficiency of SAMD9L and/or SAMD9 gene(s) contributes to myeloid transformation