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Efficient password authentication schemes based on a geometric approach for a multi-server environment

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第12期11卷 989-997页

作者： Horng-Twu LIAW chih-ta yen Meng-Yu CHIU Li-Lin HSIAO Department of Information Management Shih Hsin University Taiwan 116 Taipei Department of Information Management National Taiwan University of Science and Technology Taiwan 106 Taipei

Password authentication schemes based on a geometric approach are proposed. Based on geometrics such as a plane or space, the proposed schemes can be used to fulfill the various requirements for security and achieve more efficient results. They allow a user to register with many servers once without remembering different passwords for each, and also allow a user to change the password freely and update it offline. In addition, the proposed schemes do not need to maintain a verification table and are also computationally efficient. Moreover, we propose a specific access right (AR) to verify the legitimate user who has different authorization levels on a server in a multi-server environment.

关键词： Authentication Access right Security Geometry

A Deep Learning-Based Continuous Blood Pressure Measurement by Dual Photoplethysmography Signals

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Computers, Materials & Continua 2022年第2期70卷 2937-2952页

作者： chih-ta yen Sheng-Nan Chang Liao Jia-Xian Yi-Kai Huang Department of Electrical Engineering Taiwan Ocean UniversityKeelung202301Taiwan Department of Internal Medicine National Taiwan UniversityYun-Lin BranchDou-Liu640Taiwan Department of Electrical Engineering National Formosa UniversityYunlin632Taiwan

This study proposed a measurement platform for continuous blood pressure estimation based on dual photoplethysmography(PPG)sensors and a deep learning(DL)that can be used for continuous and rapid measurement of blood pressure and analysis of cardiovascular-related *** proposed platform measured the signal changes in PPG and converted them into physiological indicators,such as pulse transit time(PTT),pulse wave velocity(PWV),perfusion index(PI)and heart rate(HR);these indicators were then fed into the DL to calculate blood *** hardware of the experiment comprised 2 PPG components(i.e.,Raspberry Pi 3 Model B and analog-todigital converter[MCP3008]),which were connected using a serial peripheral *** DL algorithm converted the stable dual PPG signals acquired from the strictly standardized experimental process into various physiological indicators as input parameters and finally obtained the systolic blood pressure(SBP),diastolic blood pressure(DBP)and mean arterial pressure(MAP).To increase the robustness of the DL model,this study input data of 100 Asian participants into the training database,including those with and without cardiovascular disease,each with a proportion of approximately 50%.The experimental results revealed that the mean absolute error and standard deviation of SBP was 0.17±0.46 *** mean absolute error and standard deviation of DBP was 0.27±0.52 *** mean absolute error and standard deviation of MAP was 0.16±0.40 mmHg.

关键词： Deep learning(DL) blood pressure continuous non-invasive blood pressure measurement photoplethysmography(PGG)

Feature Fusion-Based Deep Learning Network to Recognize table Tennis Actions

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Computers, Materials & Continua 2023年第1期74卷 83-99页

作者： chih-ta yen Tz-Yun Chen Un-Hung Chen Guo-Chang WangZong-Xian Chen Department of Electrical Engineering Taiwan Ocean UniversityKeelung City202301Taiwanchina Office of Physical Education National Formosa UniversityYunlin County632Taiwan Department of Electrical Engineering National Formosa UniversityYunlin County 632Taiwan

A system for classifying four basic table tennis strokes using wearable devices and deep learning networks is proposed in this *** wearable device consisted of a six-axis sensor,Raspberry Pi 3,and a power *** kernel sizes were used in convolutional neural network(CNN)to evaluate their performance for extracting ***,a multiscale CNN with two kernel sizes was used to perform feature fusion at different scales in a concatenated *** CNN achieved recognition of the four table tennis *** data were obtained from20 research participants who wore sensors on the back of their hands while performing the four table tennis strokes in a laboratory *** data were collected to verify the performance of the proposed models for wearable ***,the sensor and multi-scale CNN designed in this study achieved accuracy and F1 scores of 99.58%and 99.16%,respectively,for the four *** accuracy for five-fold cross validation was 99.87%.This result also shows that the multi-scale convolutional neural network has better robustness after fivefold cross validation.

关键词： Wearable devices deep learning six-axis sensor feature fusion multi-scale convolutional neural networks action recognit

A Petrographic and Mineralogical Study of Volcanic Rocks from the Mayaxueshan Area, North Qilian Fold Belt, NW China

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Acta Geologica Sinica(English Edition) 2002年第1期76卷 15-30页

作者： HSU ta-Wei(徐达伟) SHAU yen-Hong(萧炎宏) Department of Marine Resources National Sun Yat-Sen University Kaohsiung 80424 China Department of Marine Resources National Sun Yat-Sen University Kaohsiung 80424 China

The Ordovician volcanic rocks in the Mayaxueshan area have been pervasivelyaltered or metamorphosed and contain abundant secondary minerals such as albite, chlorite, epidote,prehnite, pumpellyite, actinolite, titanite, quartz, and/or calcite. They were denoted as spilitesor spilitic rocks in terms of their petrographic features and mineral assemblages. The metamorphicgrades of the volcanic rocks are equivalent to that of the intercalated metaclastic rocks. Thisindicates that both the spilitic volcanic rocks and metaclastic rocks in the Mayaxueshan area haveformed as a result of Caledonian regional metamorphism. We suggest that the previously denotedspilitic rocks or altered volcanic rocks should be re-denoted as metabasalts or metabasaltic *** metamorphic grade of the volcanic rocks increases with their age: prehnite-pumpellyite faciesfor the upper part of the Middle Ordovician volcanic rocks, prehnite-pumpellyite to lowergreenschist facies for the lower part of the Middle Ordovician volcanic rocks, and lower greenschistfacies for the Lower Ordovician volcanic rocks. The P-T conditions are estimated as T = 240 - 290deg C and P = 1.5-4.5 kbar for the lower part of the Middle Ordovician rocks, and T = approx 300 degC for the Lower Ordovician rocks. The variations of mineral assemblages occurring at differentdomains of the volcanic rocks were controlled by the variations of the effective bulk composition inthose domains during metamorphism. The geochemical characteristics of Mg-Al chromite in theMayaxueshan volcanic rocks are consistent with an origin of island arc environment.

关键词： Qilian Fold Belt alteration regional metamorphism volcanic rock spilite basalt

Spoken dialog summarization system with HAPPINESS/SUFFERING factor recognition

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Frontiers of Computer Science 2017年第3期11卷 429-443页

作者： Yang-yen OU ta-Wen KUAN Anand PAUL Jhing-Fa WANG An-Chao TSAI Department of Electronic Engineering Cheng Kung University Talnan 701 China Department of Computer Science and Engineering Kyungpook National Univeristy Daegu 702-701 Korea Department of Digital Multimedia Design Tajen University Pingtung 741 China

This work presents a spoken dialog summariza- tion system with HAPPINESS/SUFFERING factor recognition. The semantic content is compressed and classified by factor categories from spoken dialog. The transcription of au- tomatic speech recognition is then processed through Chinese Knowledge and Information Processing segmentation system. The proposed system also adopts the part-of-speech tags to effectively select and rank the keywords. Finally, the HAPPINESS/SUFFERING factor recognition is done by the proposed point-wise mutual information. Compared with the original method, the performance is improved by applying the significant scores of keywords. The experimental results show that the average precision rate for factor recognition in outside test can reach 73.5% which demonstrates the possi- bility and potential of the proposed system.

关键词： spoken dialog summarization keyword extraction natural language processing (NLP) sentiment analysis

Classification of topological trivial matter with non-trivial defects

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Science Bulletin 2019年第9期64卷 575-579页

作者： Lokman Tsui Zi-Xiang Li yen-ta Huang Steven G. Louie Dung-Hai Lee Department of Physics University of California Materials Sciences Division Lawrence Berkeley National Laboratory

In this paper, we apply the K-theory to classify topological trivial fermionic phases which, nonetheless,host symmetry-protected non-trivial defects. An important implication of our work is that the existence of Majorana zero mode in the vortex core is neither a necessary nor a sufficient condition for the superconductor in question being topologically non-trivial.

关键词： Majorana zero mode Symmetry protected topological phase Topological superconductor Topological defect K-theory

Is repeat wide excision plus radiotherapy of localized rectal melanoma another choice before abdominoperineal resection?A case report

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World Journal of Clinical Cases 2022年第15期10卷 5057-5063页

作者： Hao-Tse Chiu ta-Wei Pu Hao yen Tung Liu Chia-Cheng Wen Department of Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Division of Colon and Rectal Surgery Department of SurgerySongshan BranchTri-Service General HospitalNational Defense Medical CenterTaipei 10581Taiwan Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Division of Colon and Rectal Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND Rectal melanoma is an uncommon neoplasm that accounts for approximately 1 percent of rectal cancer *** resection was regarded as the radical procedure for disease ***,it led to more postoperative complications than sphincter-sparing wide local excision(WLE)and reduced the patient’s quality of life(QOL)owing to creation of ***,in this study,WLE,radiotherapy(RT),and a second WLE were conducted on a patient who had been diagnosed with localized rectal *** SUMMARY The patient was a 79-year-old woman who had been experiencing anal pain and bloody stool for 1 ***,magnetic resonance imaging,positron emission tomography–computed tomography,and histological analysis of tissue biopsy using the histological markers Melan-A(+),S-100(+),and Ki-67(+,50%)lead to the diagnosis of localized rectal *** patient had initially undergone WLE to resolve problem of anal bleeding,followed by RT to treat the residual lesion with partial ***,the residual lesion was removed with margin-free resection by the second *** patient’s postoperative course was smooth and *** the 2-year follow-up,no local recurrence was ***,a good functional outcome and improved QOL were *** Combining WLE,RT,and repeat WLE is proposed as a viable alternative for treating rectal melanoma accompanied by bleeding symptoms that cannot be completely resected at the beginning.

关键词： Sphincter-sparing local wide excision Radiotherapy Rectal melanoma Case report

Successful management of adult lymphoma-associated intussusception by laparoscopic reduction and appendectomy

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World Journal of Gastroenterology 2016年第19期22卷 4781-4785页

作者： ta-Wei Yang yen-Yue Lin Yi-Wei Tsuei yen-Lin Chen Cheng-Yi Huang Sheng-Der Hsu Department of Emergency Medicine Taoyuan Armed Forces General Hospital Department of Radiology Taoyuan Armed Forces General Hospital Department of Pathology National Defense Medical Center Tri-Service General Hospital Department of Traumatic and General Surgery National Defense Medical Center Tri-Service General Hospital

Although primary gastrointestinal lymphoma is a rare malignancy, it can cause an intussusception in adults and can be a clinically challenging condition to manage. Intussusception could progress to lifethreatening complications if left untreated or could delay chemotherapy if inappropriate surgical management is used. We report a 31-year-old man diagnosed with human immunodeficiency virus who was being treated with antiretroviral therapy. He presented with nausea, vomiting, poor appetite, and intermittent, cramping abdominal pain for over 1 wk. Abdominal computed tomography revealed a well-defined homogeneous mass in the mesenteric root region, together with a long segmental wall thickening in the ileum with ileocolic-type intussusception, which was suspected to be caused by a lymphoma. The intussusception was successfully laparoscopically reduced, and the tumor involvement of the appendix was confirmedby appendectomy with intraoperative frozen section. Systemic chemotherapy was immediately initiated after surgery without the need for bowel resection.

关键词： Intussusception Adult Intestinal lymphoma Appendectomy

Repair of a giant inguinoscrotal hernia with herniation of the ileum and sigmoid colon:A case report

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World Journal of Clinical Cases 2023年第2期11卷 401-407页

作者： Shih-Hung Liu Ching-Hen yen Hsu-Ping Tseng Je-Ming Hu Ching-Han Chang ta-Wei Pu Department of Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Division of Urological Surgery Department of SurgerySongshan BranchTri-Service General HospitalNational Defense Medical CenterTaipei 10581Taiwan Division of Colon and Rectal Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Department of Surgery Kaohsiung Armed Forces General HospitalKaohsiung 802Taiwan Division of Colon and Rectal Surgery Department of SurgerySongshan BranchTri-Service General HospitalNational Defense Medical CenterTaipei 10581Taiwan

BACKGROUND Giant inguinoscrotal hernias are huge inguinal hernias that extend below the midpoint of the inner thigh in the standing *** inguinoscrotal hernias are rare in developed countries because of their better medical resources and early ***,they can develop in patients who refuse surgery or ignore their *** is inevitable because strangulation and organ perforation can occur,leading to peritonitis and *** surgical approaches include open abdominal and inguinal approaches or a combination of *** SUMMARY We present the case of a 73-year-old man who visited our emergency department with a huge mass in his left scrotum and septic *** computed tomography revealed a large left inguinoscrotal hernia that contained small bowel loops and the *** surgical intervention was performed immediately because intestinal strangulation was highly *** operative repair was performed using a combination of mini-exploratory laparotomy and the inguinal *** incarcerated organs,which included the ileum and sigmoid colon,had relatively good intestinal perfusion without perforation or ischemic *** were successfully reduced into the abdomen,and bowel resection was not necessary.A tension-free prosthetic mesh was used for the hernia *** weeks after the initial surgery,and with adequate antimicrobial therapy,the patient recovered and was discharged from our *** evidence of hernia relapse was noted during the outpatient follow-up examination 3 mo after *** Emergency surgery involving combined mini-exploratory laparotomy and the inguinal approach should be performed for serious incarcerated giant inguinoscrotal hernias.

关键词： Inguinal hernia Ileum Sigmoid colon Sepsis Hernia repair Case report