Toward Introduction of Immunity-based Model to Continuous Behavior-based User Authentication on Smart Phone

AbstractSmart phone stores a lot of important private information, so that user authentication is increasingly necessary to prevent attacks by illegal users who are not the owner of the smart phone. Password authentication or biometrics can be generally applied only on login. After the authentication is passed, not only the legal owner but also illegal users freely use the smart phone. Therefore we are trying to develop a behavior-based user authentication system to continuously check the user activities after login. The developing system can extract many operational and behavioral features characteristic of user by multiple sensors; for example, touch screen, accelerometer, microphone, and GPS sensor. And then it can combine the authentication results from the multiple sensors because a single sensor may produce poor authentication accuracy. In this paper, we report the ongoing results of our system, that is, the experimental results from user authentication using touch operational features, and some features extracted from accelerometer. We also discuss the introduction of immunity-based model to our system to integrate the authentication results from the multiple sensors

Attribute Assignment to Point Cloud Data and Its Usage

In recent years, with the development of laser measurement technology, utilization of point cloud data is progressing. However, since point cloud data does not contain attribute information, the usability of the data is low. It is possible to consider that by assigning attributes to the nonattribute point cloud data, this can lead to the usage of point cloud data in each phase of life cycle of construction: design, construction, and maintenance. Therefore, in this paper, the authors have proposed an attribute assignment method for point cloud data. In addition, the authors proposed the way to use attributed point cloud data, the usage as objects, data linkage, and visualization by using the attribute assignment method. Point cloud data of a dam was used as a case study for the proposed method and the usage

Risk factors for cognitive dysfunction after coronary artery bypass graft surgery in patients with type 2 diabetes

ObjectivesThe mechanisms of postoperative cognitive dysfunction in patients with diabetes after coronary artery bypass grafting are not fully understood. We sought to determine which type 2 diabetes–related factors contributed to postoperative cognitive dysfunction at 7 days and 6 months after coronary artery bypass grafting.MethodsOne hundred eighty patients with type 2 diabetes who were scheduled for elective coronary artery bypass grafting were studied. As a control group, 100 patients without diabetes mellitus matched for age, sex, and educational level were examined. Hemodynamic parameters (arterial and jugular venous blood gas values) were measured during cardiopulmonary bypass. All patients underwent a battery of neurologic and neuropsychologic tests the day before surgery, 7 days after surgery, and 6 months after surgery.ResultsAge (odds ratio 1.5, 95% confidence interval 1.3-1.8, P = .03), presence of hypertension (odds ratio 1.8, 95% confidence interval 1.3-2.0, P = .01), jugular venous oxygen saturation less than 50% time (odds ratio 1.5, 95% confidence interval 1.1-2.0, P = .045), presence of ascending aorta atherosclerosis (odds ratio 1.5, 95% confidence interval 1.1-2.6, P = .01), diabetic retinopathy (odds ratio 2.0, 95% confidence interval 1.3-3.0, P = .01), and insulin therapy (odds ratio 2.0, 95% confidence interval 1.3-3.0, P = .05), were associated with cognitive impairment at 7 days. Insulin therapy (odds ratio 2.0, 95% confidence interval 1.3-3.8, P = .01), diabetic retinopathy (odds ratio 1.3, 95% confidence interval 1.2-2.9, P < .01), and hemoglobin A1c (odds ratio 1.9, 95% confidence interval 1.3-3.1, P = .047) were associated with cognitive impairment at 6 postoperative months.ConclusionsInsulin therapy, diabetic retinopathy, and hemoglobin A1c were factors in cognitive impairment at 7 days and 6 months after coronary artery bypass grafting in patients with type 2 diabetes

Development of an Operating Strategy for On-Demand Earth Observation Missions of the Diwata-2 Microsatellite

Diwata-2 is the Philippines’ 2nd microsatellite developed by Tohoku University, Hokkaido University, University of the Philippines, and the Philippine Department of Science and Technology. Its primary purpose is gathering remote sensing data through imaging areas of interest for the Philippines. This paper presents the study of Diwata-2’s initial Earth observation pointing performance, investigation of its Attitude Determination and Control System, the tuning of its Star Tracker sensor parameters, the in-flight target pointing calibration, and the sequential scheduling of its components forming an operation strategy for an effective on-demand earth observation mission. This operation strategy has managed to improve the satellite’s pointing performance from the initial 2.88°±2.06° RMS pointing error to having an accuracy of 0.204°±0.12° RMS for its High Precision Telescope payload. This strategy has been implemented to the university-built microsatellite for over 400 successful Earth observation missions and has covered about 82.8% of the Philippine’s land area with its Spaceborne Multispectral Imager payload

Phylogeny and ontogeny of mental time

Humans have mental time in our mind, apart from physical time that is a part of system that governs the physical world, and memory is our key cognitive ability for recognizing the passage of time. Recent studies have suggested that the memory system of several nonhuman animals may have an incidental nature, which is also a feature of episodic memory. In addition, apes, which are phylogenetically close to humans, have an ability to remember a single past event. In the case of humans, preverbal infants under the age of two are able to retain long-term memory of a single event and apply it to predict a future event. Thus, nonhuman animals and preverbal human infants both have their own specific mental time travel abilities, and there is a phylogenetic and ontogenic basis of full-fledged mental time travel that can be found in human adults

In-orbit Demonstration of Reaction Control System for Orbital Altitude Change of Micro-Satellite ALE-2

This research presents the results of an in-orbit test of the orbital altitude control for a micro-satellite equipped with the first space-demonstrated high-density small cold gas jet thruster. In the field of micro-satellites, the application of thrusters to practical missions has not yet progressed due to their high cost, mechanical and electrical incompatibility with the satellite bus system, and increased operational risks. By contrast, the demand for orbit control functions has been increasing in recent years with the expansion of micro-satellite applications. The76kg satellite ALE-2 , which was jointly developed by Tohoku University and ALE Co., Ltd., has the world\u27s first challenging mission to artificially generate shooting stars by ejecting small substances (meteor source) from the ejection device fixed on the satellite body. To avoid collision of the ejected meteor source with other flying objects, the mission must be performed in a sun-synchronous orbit at an altitude of less than 400 km, which is lower than that of the International Space Station. However, it is required to maintain the mission orbit autonomously because the orbit decay is large due to the effect of atmospheric drag. In addition, to release the meteor source at an arbitrary orbital position, it is essential to manipulate the ground track by raising and lowering the orbital altitude. Therefore, ALE-2 needs to control the orbit altitude actively and with arbitrary amount of change. In this study, the reaction control system (RCS), which satisfies the orbit change capability, mission requirements, and compatibility with the satellite bus system, is installed on ALE-2 to perform space demonstrations of orbit control and to evaluate the operational performance of the thruster. ALE-2 will be the first to be equipped with a cold gas jet thruster developed by Patched conics, LLC. It is estimated that the thruster is capable of changing altitude more than 1 km by continuous drive for one orbital period. Using this RCS, the following three criteria were set as the evaluation criteria: (Minimum) the orbit altitude can be actively changed by the thruster, (Full) the orbit altitude can be controlled by an arbitrary amount of operation and can be increased more than 1 km per orbit, and (Extra) the mission orbit can be transferred according to the meteor source release plan. ALE-2 was launched on December 6, 2019, and the in-orbit test of the RCS started four months later. Although the RCS was not able to achieve its initial orbit change capability due to an anomaly in the power supply system, various kinds of tests were conducted under conditions that allowed continuous thruster operation. It was confirmed that the orbit altitude was increased by 0.4 km per orbit. In addition, the fault detection, isolation and recovery (FDIR)function was effectively performed against any kinds of anomalies of RCS during in-orbit operation. Therefore, a sustained orbital altitude of 400 km was expected to be achievable using the onboard RCS

Conservation Genetics of Three Endangered Species of the Genus Oxera in the South of New Caledonia

Poster Presentation

Ecosystem and Fishery of Manila Clam (Ruditapes philippinarum) in Ise-Bay Related to Eco-Compatible Management of Its River Basin Complex

AbstractIse bay, Japan, is located at the river mouth of 10 class-A rivers, and its environment is closely related to management of their river basin complex (RBC). We developed a model to describe the ecosystem of RBC by developing three tool boxes: TB1 to describe the water/material flux network, TB2 to describe ecosystem mechanism in various categories of landscapes, and TB3 to standardize ecosystem services received at local sites and integrate them throughout RBC. Ecosystem has a function to change the fluxes, which is evaluated by TB2, and such flux change can be fed back to the flux networks in TB1. The outputs of the fluxes from the RBC are inputs for currents of water with various qualities to the bay, which can be computed by bay-dynamics modeling. Then it provides various fluxes from the bay interior to landscapes located along coastal zone, and it supports ecosystem there. Fishery is a kind of ecosystem service there. We focused on bivalve, Manila clam (Ruditapes philippinarum) because it uses various landscapes in a bay through its life cycle and it provides fishery activity as ecosystem service. We have developed TB1 and TB2 also in bay area successfully. Then, we evaluate the transition of quality of environments of RBC including Ise bay from the past to the present by using TB1-TB3 for river basin and bay area. Furthermore, we forecast the future situation and then we discuss how we can improve it through various combinations of measures and policies in the RBC as well as in the bay