Emotion and Concentration Integrated System: Applied to the Detection and Analysis of Consumer Preference

With the expansion of consumer market, the appearance becomes an important issue when consumers make decisions under the situation of similar qualities and contents. Accordingly, to attract consumers, companies cost and take much attention on product appearance. Compared to using questionnaires individually, obtaining humans’ thoughts directly from their brains can accurately grasp the actual preference of consumers, which can provide effective and precious decisions for companies. \ In this study, consumers’ brainwaves which are related to concentration and emotion are extracted by wearing a portable and wireless Electroencephalography (EEG) device. The extracted EEG data are then trained by using perceptron learning algorithm (PLA) to make the judgments of concentration and emotion work well with each subject. They are then applied to the detection and analysis of consumer preference. Finally, the questionnaires are also performed and used as the reference on training process. They are integrated with brainwaves data to create one prediction model which can improve the accuracy significantly. The Partial Least Squares is used to compare the correlation between different factors in the model, to ensure the test can accurately meet consumers’ thoughts

Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb−1 of pp collisions at √s=13 TeV with the ATLAS detector

A search for heavy neutral Higgs bosons and Z′ bosons is performed using a data sample corresponding to an integrated luminosity of 36.1 fb−1 from proton-proton collisions at √s=13 TeV recorded by the ATLAS detector at the LHC during 2015 and 2016. The heavy resonance is assumed to decay to τ+τ− with at least one tau lepton decaying to final states with hadrons and a neutrino. The search is performed in the mass range of 0.2-2.25 TeV for Higgs bosons and 0.2-4.0 TeV for Z′ bosons. The data are in good agreement with the background predicted by the Standard Model. The results are interpreted in benchmark scenarios. In the context of the hMSSM scenario, the data exclude tan β > 1.0 for mA= 0.25 TeV and tan β > 42 for mA=1.5 TeV at the 95% confidence level. For the Sequential Standard Model, ZSSM′ with mZ′< 2.42 TeV is excluded at 95% confidence level, while Z NU′ with mZ ′ < 2.25 TeV is excluded for the non-universal G(221) model that exhibits enhanced couplings to third-generation fermions

Using Blockchain for Digital Evidence Preservation in Log Data

近來駭客入侵企業網路的新聞時有所聞及個資法的上路，使得企業開始重視數位鑑識領域，為了達到個資法中無過失免責的原則以及能在事後有效舉證，數位證據保全更顯得重要。而日誌資料在資安事件發生時，在法律上可作為追蹤事件的管道與證明行為之軌跡，但日誌資料能輕易被修改，不易確定資料完整性及原始來源，因此要讓法官相信日誌資料的證據力及證據能力時更顯得困難。故本研究針對企業欲保存數位證據保全之需求，開發日誌資料之數位證據保全，利用區塊鏈的不可竄改性將日誌資料儲存在區塊鏈分散式帳本中，利用區塊鏈中聯盟鏈的概念，設計了一條包含伺服器節點及各企業節點之區塊鏈，由伺服器控管節點權限，企業可將日誌資料儲存至區塊鏈上，產生區塊後各節點皆會收到此區塊，以此達 到資料的不可竄改性及一致性。在訴訟上可利用此技術承認日誌資料之證據能力，也加強了日誌資料之證據力，使企業達到個資法上無過失免責及舉證之目的。Recently, the news of hackers hack into company's network has been heard and the personal data protection law has been issued, which have made company pay attention to the field of digital forensics. In order to achieve the principle of absolute liability in personal data protection law and be able to prove effectively after the event, the preservation of digital evidence is even more important. Also, the log data can be used as a track for tracking incidents, and it can prove behavior when a security incident happens. However, the log data can be easily modified, and it is hard to determine the integrity and original source of data. Therefore, it is more difficult for the judge to believe the admissibility of evidence and the probative value of evidence. In this study, we will aim at the need for company to preserve the digital evidence to develop a digital evidence preservation in log data. We use blockchain's unmodifiable feature to store log data in blockchain distributed ledger, and use the consortium blockchain to design a blockchain, which contains one server peer and some company peers. The server peer controls peer's permissions, and the company peers can store log data on the blockchain. When block is generated by mining peer, each peer will receive this block, thereby achieving the unmodifiable and consistency of log data. In the litigation, it can not only be used to prove the probative value of evidence, but also make the log data more powerful in admissibility of evidence. So that company can achieve the purpose of absolute liability and prove effectively after the event.Chapter 1 緒論 1 1.1 前言 1 1.2 動機與目的 4 1.3 論文架構 6 Chapter 2 文獻探討 7 2.1. 日誌資料(Log File) 7 2.1.1. 日誌檔輸出 8 2.1.2. 日誌資料管理 10 2.2. 區塊鏈(Blockchain) 12 2.2.1. 區塊結構 13 2.2.2. 區塊鏈技術 14 2.2.2.1. 雜湊函式(Hash Function) 14 2.2.2.2. 默克爾樹(Merkle Tree) 15 2.2.2.3. 公開金鑰基礎建設(Public Key Infrastructure, PKI) 16 2.2.2.4. 對等式網路(Peer-to-Peer, P2P) 19 2.2.3. 區塊鏈運作流程 20 2.2.4. 共識機制 20 2.2.4.1. 工作量證明(Proof of Work, POW) 21 2.2.4.2. 權益證明(Proof of Stake, POS) 23 2.2.4.3. 授權股權證明機制(Delegate Proof of Stake, DPOS) 24 2.2.5. 區塊鏈類型 24 2.2.6. 應用 25 2.2.6.1. 比特幣(Bitcoin) 25 2.2.6.2. 以太坊(Ethereum) 25 2.2.6.3. 超級帳本(Hyperledger) 26 Chapter 3 系統設計 29 3.1. 系統分析與目的 29 3.2. 系統概述 29 3.2.1. 分散式系統架構 30 3.2.2. 系統流程 30 3.2.3. 系統設計 31 3.2.3.1. 寫入日誌資料 32 3.2.3.2. 區塊產生 35 3.2.3.3. 資料同步傳輸 36 3.2.3.4. 驗證日誌資料 37 3.2.3.5. 共識機制 39 Chapter 4 系統實作 40 4.1. 系統環境 40 4.2. 實作成果 41 4.2.1. 寫入日誌資料 41 4.2.2. 區塊產生 44 4.2.3. 資料同步傳輸 46 4.2.4. 驗證日誌資料 48 4.2.5. 網頁呈現 50 4.3. 系統評估 52 Chapter 5 結論與未來研究 53 Reference 5

Jianghan plain, the locale of China’s Great Flood four thousand years ago

Abstract The Yellow River Plain (YRP), being regarded as the cradle of Chinese civilization, is traditionally thought to be the locale of the Great Flood, a hazardous flood (or floods) tamed by Yu who started China’s first “dynasty”, Xia, in ~ 2000 BC. However, by integrating published archaeological data, we propose that the Great Flood in fact impacted the Jianghan Plain (JHP) along the middle course of the Yangtze River. The arguments include: (1) around the era of the Great Flood, the most civilized and populated society in East Asia, named the Jianghan society, was located around the JHP (at that time, the habitation on the YRP remained limited); (2) the Jianghan society lived on river resources (shipping and rice growing) and was thus subject to flood risks (but not for the people inhabiting the YRP); (3) the people in the Jianghan society were experienced in dredging moats/ditches for shipping and irrigation; (4) unlike the floods on the YRP that were characterized by dynamic sedimentation and channel avulsion, those on the JHP typically occurred with slow-moving water manageable to ancient people; (5) the JHP has been associated with lake/wetland systems serving as detention basins during floods. Here, the recorded method for controlling the Great Flood, dredging channels to divert flood water to a “sea”, was feasible. Known speleothem paleo-rainfall data from multiple sites show that the climate of the JHP had been wet since the middle Holocene (earlier than the era of the Great Flood) and significantly turned dry after ~ 1850 BC (~ 150 years later than the Great Flood). Thus, the uniqueness of the Great Flood was likely to reflect an increase in land use on the JHP with the expansion of the Jianghan society, and the success in taming this flood was mainly due to the efforts of the society, not by luck

Numerical investigation on the temperature uniformity of micro-pin-fin heat sinks with variable density arrangement

Temperature non-uniformity on chips has drawn the attention of researchers due to unwanted thermal stress development on chips resulting in a reduction in their life cycle and performance. In the present investigation, the heat transfer and flow characteristics of the coolant in the micro-pin-fin heat sink with variable density arrangement have been conducted numerically. The dimensions of the micro-pin-fin heat sink are 18.0 mm × 19.0 mm × 4.0 mm, and the height of the micro-pin-fin is 2 mm. Circular micro-pin-fin with diameters of 400, 500, and 600 μm, respectively have been considered. The power supply is 50 W with a heat source area of 10.0 mm × 10.0 mm. Water was the working fluid used while aluminum was used for the solid part of the heat sink. The operating pressure drop between the inlet and the outlet of the heat sink is fixed at 1500 Pa, 3000 Pa, and 5000 Pa. Ansys-Fluent was employed for the analysis. The results indicate that the temperature uniformity on the heat source for heat sink with variable density arrangement is better than that with staggered arrangement for about the same number of micro-pin-fins. The best effective thermal resistance is noted as 0.258 K/W among the heat sinks with all the configurations. In addition, the temperature difference per unit length on the heat source for heat sink with convergent arrangement at the pressure difference of 5000Pa and micro-pin-fin diameter of 600 μm was 1.34 K/mm, which is lower than the previously reported literature

Effects of unilateral posterior missing-teeth on the temporomandibular joint and the alignment of cervical atlas.

Cervical atlas alignment changes are associated with craniofacial development. Disturbance of craniofacial development may be associated with temporal mandibular joint function. Therefore, we examined the possibility of a correlation between unilateral missing teeth and morphologic changes of the spine and posture. We collected eighty-nine patients (38 men and 51 women) with unilateral posterior missing teeth and twenty patients without previous orthodontic treatment or missing posterior teeth by tracing and analyzing their panoramic and cephalometric film. We measured the angulations of articular eminence, cranio-cervical angle, and the percentage of the occlusal plane passing through the first and second cervical vertebrae with other morphologic geometric data. The angle of articular eminence inclination was higher in the non-missing teeth group than the missing teeth group (46.66° and 42.28°, respectively). The cranio-cervical angle was smaller in the missing posterior teeth group than the non-missing posterior teeth group (99.81° and 103.27°, respectively). The missing teeth group also showed fewer occlusal planes passing through the intersection of the first and second cervical vertebrae compared to the non-missing teeth group (28.9% and 65%, respectively). Individuals with unilateral missing teeth had lower articular eminence inclination, smaller cranio-cervical angle, and a lower percentage of the occlusal plane passing through the intersection of the first and second cervical vertebrae

Ball Impact Reliability of Zn-Sn High-Temperature Solder Joints Bonded with Different Substrates

In this study, the high-speed deformation behavior of solder joints formed withPb-free Zn-Sn and commercial Pb-Sn alloys bonded on different substrateswas investigated by the ball impact test method. Overall, Zn-Sn jointsexhibited greater impact strength but inferior impact toughness than Pb-Snjoints. This can be ascribed to the high hardness of Zn-Sn solders resulting inpartial or overall interfacial fracture. In contrast, the joints with soft Pb-Snsolders all showed a ductile fracture feature. It is suggested that, for the jointsrevealing brittle fracture, the impact toughness (impact energy) increasedwith the plastic ability of interfacial intermetallic compounds, while for thoseshowing a ductile fracture mode, the impact energy deteriorated with ahardened solder matrix resulting from substrate dissolution

Amplification of the Signal Intensity of Fluorescence-Based Fiber-Optic Biosensors Using a Fabry-Perot Resonator Structure

Fluorescent biosensors have been widely used in biomedical applications. To amplify the intensity of fluorescence signals, this study developed a novel structure for an evanescent wave fiber-optic biosensor by using a Fabry-Perot resonator structure. An excitation light was coupled into the optical fiber through a laser-drilled hole on the proximal end of the resonator. After entering the resonator, the excitation light was reflected back and forth inside the resonator, thereby amplifying the intensity of the light in the fiber. Subsequently, the light was used to excite the fluorescent molecules in the reactive region of the sensor. The experimental results showed that the biosensor signal was amplified eight-fold when the resonator reflector was formed using a 92% reflective coating. Furthermore, in a simulation, the biosensor signal could be amplified 20-fold by using a 99% reflector

Implementation of Obstacle-Avoidance Control for an Autonomous Omni-Directional Mobile Robot Based on Extension Theory

The paper demonstrates a following robot with omni-directional wheels, which is able to take action to avoid obstacles. The robot design is based on both fuzzy and extension theory. Fuzzy theory was applied to tune the PMW signal of the motor revolution, and correct path deviation issues encountered when the robot is moving. Extension theory was used to build a robot obstacle-avoidance model. Various mobile models were developed to handle different types of obstacles. The ultrasonic distance sensors mounted on the robot were used to estimate the distance to obstacles. If an obstacle is encountered, the correlation function is evaluated and the robot avoids the obstacle autonomously using the most appropriate mode. The effectiveness of the proposed approach was verified through several tracking experiments, which demonstrates the feasibility of a fuzzy path tracker as well as the extensible collision avoidance system