A ransomware attack that interrupted the operation of Colonial Pipeline(a large U.S.oil pipeline company),showed that security threats by malware have become serious enough to affect industries and social infrastructu...A ransomware attack that interrupted the operation of Colonial Pipeline(a large U.S.oil pipeline company),showed that security threats by malware have become serious enough to affect industries and social infrastructure rather than individuals alone.The agents and characteristics of attacks should be identified,and appropriate strategies should be established accordingly in order to respond to such attacks.For this purpose,the first task that must be performed is malware classification.Malware creators are well aware of this and apply various concealment and avoidance techniques,making it difficult to classify malware.This study focuses on new features and classification techniques to overcome these difficulties.We propose a behavioral performance visualization method using utilization patterns of system resources,such as the central processing unit,memory,and input/output,that are commonly used in performance analysis or tuning of programs.We extracted the usage patterns of the system resources for ransomware to performbehavioral performance visualization.The results of the classification performance evaluation using the visualization results indicate an accuracy of at least 98.94%with a 3.69%loss rate.Furthermore,we designed and implemented a framework to perform the entire process—from data extraction to behavioral performance visualization and classification performance measurement—that is expected to contribute to related studies in the future.展开更多
Okinawa in the subtropical islands enclosed in the ocean has a problem that corrosion of structures progresses quickly because of high temperature, high humidity and adhesion of sea-water mists flying from sea. Author...Okinawa in the subtropical islands enclosed in the ocean has a problem that corrosion of structures progresses quickly because of high temperature, high humidity and adhesion of sea-water mists flying from sea. Author is interested in corrosion of bridge made of weatherability steel. Therefore, it needs to investigate the flow structure around bridge beams and behavior of sea-water mist (droplet). In this paper, flow visualization and PIV are attempted to understand the flow structures around bridge beams and, furthermore, numerical approach of motion of droplets is attempted to understand the collision of sea-water mists on the bridge wall.展开更多
A novel method case-based reasoning was proposed for suspicious behavior recognition. The method is composed of three departs: human behavior decomposition, human behavior case representation and case-based reasoning....A novel method case-based reasoning was proposed for suspicious behavior recognition. The method is composed of three departs: human behavior decomposition, human behavior case representation and case-based reasoning. The new approach was proposed to decompose behavior into sub-behaviors that are easier to recognize using a saliency-based visual attention model. New representation of behavior was introduced, in which the sub-behavior and the associated time characteristic of sub-behavior were used to represent behavior case. In the process of case-based reasoning, apart from considering the similarity of basic sub-behaviors,order factor was proposed to measure the similarity of a time order among the sub-behaviors and span factor was used to measure the similarity of duration time of each sub-behavior, which makes the similarity calculations more rational and comprehensive.Experimental results show the effectiveness of the proposed method in comparison with other related works and can run in real-time for the recognition of suspicious behaviors.展开更多
Online question and answer(Q&A)communities,which allow users to exchange knowledge by asking and answering questions,have become increasingly popular.As a result of user active participation,these communities stor...Online question and answer(Q&A)communities,which allow users to exchange knowledge by asking and answering questions,have become increasingly popular.As a result of user active participation,these communities store overwhelming volumes of information.However,existing related methods are unable to meet community operators’needs for analyzing multi-dimensional Q&A sequences and understanding user behavior.In this paper,collaborating with domain experts in online community,we present a system,VisQAC,which explores the patterns of Q&A sequence and user behavior.In the system,a novel visual design is proposed,which is combined with flexible mapping measures for analyzing critical characteristics of sequence data.Moreover,a timeline visualization method is designed to visualize data with categorical attributes and its correlation can be displayed flexibly by choosing time mode and time granularity.The usefulness and effectiveness of the system are demonstrated with several case studies of VisQAC with community operators based on the Zhihu dataset.Our evaluation shows that VisQAC is beneficial to the understanding of Q&A sequence and associated user behavior.展开更多
The downward moving behavior of pellets in a 8 m2 pellet shaft furnace with an internal vertical air channel and a drying bed was studied by means of a visualized model(1-15) and a top model(1-1).The visualized model ...The downward moving behavior of pellets in a 8 m2 pellet shaft furnace with an internal vertical air channel and a drying bed was studied by means of a visualized model(1-15) and a top model(1-1).The visualized model experiment shows that the downward movement of pellets can be regarded as plug flow approximately inside the furnace except for the lower region of cooling zone due to the influence of the drained hopper.The top model experiment reveals that the pellet sizes increase along the moving direction because of the percolation phenomenon,which results in a decrease of the resistance coefficient and an increase of the gas flow rate from the furnace wall toward the furnace center.展开更多
The study of defense behavior development in pied flycatcher altricial nestlings has shown that preceding visual deprivation decreased the capability to freeze in the young. At the same time, auditory thresholds of de...The study of defense behavior development in pied flycatcher altricial nestlings has shown that preceding visual deprivation decreased the capability to freeze in the young. At the same time, auditory thresholds of deprived nestlings were lower than those of the nestlings developing in unaltered visual environment. Our goal in the present work was to study effects of visual input on the functional development of neural circuitry for flycatcher’s acoustically-guided defensive behavior. We compared the immunohistochemical response of transcription factors ZENK and c-Fos in the nestlings’ auditory telencephalic structures in visually deprived and non-deprived flycatcher nestlings to alarm calls emitted by adult birds. We have demonstrated that the development of flycatcher nestlings under the conditions of limited visual afferentation results in the decrease of induction of the immediate-early genes c-Fos and ZENK in auditory structures of 9-day-old nestlings performing auditory-guided defense behavior. The most marked decrease of induction of both genes is observed in Field L. Our data suggest that visual afferentation affects neuronal activations in higher auditory structures of nestlings’ brain that, in turn, may increase the efficiency of species-typical alarm call. Thus, the work demonstrated for the first time that visual affererntation facilitates the growth of efficiency of alarm call affecting the activity of neurons in auditory integrative structures.展开更多
Mechanisms of predator detection and the influence of the presence of nonlethal predators on antipredator defense behavior and metamorphic traits were studied in the Indian tree frog, Polypedates maculatus. Exposure o...Mechanisms of predator detection and the influence of the presence of nonlethal predators on antipredator defense behavior and metamorphic traits were studied in the Indian tree frog, Polypedates maculatus. Exposure of P. maculatus tadpoles to chemical cues of caged predator（crabs, Barytelphusa spp.） fed with either conspecific or heterogeneric tadpoles, or were starved elicited defense behavior（by avoiding predator zone） in them. Such a behavior was not evident when exposed to predators housed in a glass beaker（visual cues）. Both early（Gosner stage 27–28） and later（Gosner stage 35–36） stage tadpoles when exposed to caged predators（fed with conspecific tadpoles）, prey tadpoles spent less time swimming and remained motionless for longer periods. Yet, the time spent by prey in feeding was unaffected. Further, the predator avoidance behavior exhibited by them was of the same intensity regardless of whether the caged predators were fed or starved implying the influence of predator＇s kairomones. Tadpoles reared with caged predator reached the metamorphic climax stage（MC stage; Gosner stage 42） earlier than those reared without a predator. Size at emergence（Gosner stage 46） was comparable in both the groups. The findings suggest that P. maculatus tadpoles assess predation risk chiefly by sensing kairomones of the predator in eliciting antipredator defense behaviors. Accelerated development and early metamorphosis without any compromise of the size at emergence may be due to their unaltered feeding activity.展开更多
Visual merchandising encourages customers to enter the store by making it appealing to them and influencing their perception of it. It is the art of putting together effective display designs and ideas in order to boo...Visual merchandising encourages customers to enter the store by making it appealing to them and influencing their perception of it. It is the art of putting together effective display designs and ideas in order to boost store traffic and sales. It’s also a way to engage with customers and influence their purchasing decisions. A fashion trend occurs when a particular item, silhouette, color, or other new look rises in popularity. It changes with the seasons, and the store serves as a hub for communicating these changes to potential customers. Because items must be sold within a certain time frame, several display tactics are used to best present the merchandise and communicate the current fashion trends to customers. Visual merchandising becomes a key aspect of difference from merchants in the same category as retail firms, particularly fashion brands, try to compete in an already saturated market. Effective branding is now a vital success component for all types of fashion firms. Fashion brands may use effective branding tactics to build equity, promote consumer brand loyalty, and increase profitability. Visual merchandising is critical for inferring various customers’ perspectives and adding value to businesses. Its major goal is no longer to make items appealing in order to sell them quickly;it is rather to stand out, develop the correct brand image, and give the greatest possible customer experience. Visual merchandising aspects, when employed correctly, can infiltrate the buyer’s brain and prompt them to generate a favorable opinion of the store, allowing it to leverage its brand image. In this context, this research review focuses and aims to study the link between visual merchandising and Apparel Fashion trends, to study the relationship between visual merchandising and fashion branding and to find out the research gaps and scope for future research directions in the area of visual merchandising applied in fashion apparel industry.展开更多
为明确自动化初始信任水平对城市轨道交通驾驶任务接管绩效、工作负载和视觉行为的影响,设计并验证自动化初始信任问卷,使用问卷筛选显著初始信任水平被试进行模拟驾驶试验;通过记录常用制动和紧急制动时间反应接管绩效,使用NASA-TLX(na...为明确自动化初始信任水平对城市轨道交通驾驶任务接管绩效、工作负载和视觉行为的影响,设计并验证自动化初始信任问卷,使用问卷筛选显著初始信任水平被试进行模拟驾驶试验;通过记录常用制动和紧急制动时间反应接管绩效,使用NASA-TLX(national aeronautics and space administration task load index)问卷计算工作负载,并分别采集轨道路面和驾驶界面2个区域的扫视次数、总注视次数、注视时间和平均注视时间以分析视觉行为差异.试验结果表明:不同初始信任水平的参与者接管绩效不存在显著差异;高初始信任水平参与者相比低信任水平参与者整体工作负载低21.39%,身体负荷低34.24%和挫折程度低31.96%;初始信任水平显著影响视觉行为,低信任参与者趋向于活跃的视觉搜索行为,轨道路面的注视次数、轨道路面和驾驶界面的扫视次数分别高出28.14%、41.78%和42.91%;而高信任参与者趋向于固定的视觉凝视行为,轨道路面的平均注视时间高出40.74%.研究可为城市轨道交通驾驶安全干预提供理论参考和实践依据.展开更多
基金This work was supported by the Institute of Information&Communications Technology Planning&Evaluation(IITP)(Project No.2019-0-00426%,10%)the ICT R&D Program of MSIT/IITP(Project No.2021-0-01816,A Research on Core Technology of Autonomous Twins for Metaverse,10%)National Research Foundation of Korea(NRF)grant funded by the Korean government(Project No.NRF-2020R1A2C4002737%,80%).
文摘A ransomware attack that interrupted the operation of Colonial Pipeline(a large U.S.oil pipeline company),showed that security threats by malware have become serious enough to affect industries and social infrastructure rather than individuals alone.The agents and characteristics of attacks should be identified,and appropriate strategies should be established accordingly in order to respond to such attacks.For this purpose,the first task that must be performed is malware classification.Malware creators are well aware of this and apply various concealment and avoidance techniques,making it difficult to classify malware.This study focuses on new features and classification techniques to overcome these difficulties.We propose a behavioral performance visualization method using utilization patterns of system resources,such as the central processing unit,memory,and input/output,that are commonly used in performance analysis or tuning of programs.We extracted the usage patterns of the system resources for ransomware to performbehavioral performance visualization.The results of the classification performance evaluation using the visualization results indicate an accuracy of at least 98.94%with a 3.69%loss rate.Furthermore,we designed and implemented a framework to perform the entire process—from data extraction to behavioral performance visualization and classification performance measurement—that is expected to contribute to related studies in the future.
文摘Okinawa in the subtropical islands enclosed in the ocean has a problem that corrosion of structures progresses quickly because of high temperature, high humidity and adhesion of sea-water mists flying from sea. Author is interested in corrosion of bridge made of weatherability steel. Therefore, it needs to investigate the flow structure around bridge beams and behavior of sea-water mist (droplet). In this paper, flow visualization and PIV are attempted to understand the flow structures around bridge beams and, furthermore, numerical approach of motion of droplets is attempted to understand the collision of sea-water mists on the bridge wall.
基金Project(50808025)supported by the National Natural Science Foundation of ChinaProject(2013GK3012)supported by the Science and Technology Project of Hunan Province,China
文摘A novel method case-based reasoning was proposed for suspicious behavior recognition. The method is composed of three departs: human behavior decomposition, human behavior case representation and case-based reasoning. The new approach was proposed to decompose behavior into sub-behaviors that are easier to recognize using a saliency-based visual attention model. New representation of behavior was introduced, in which the sub-behavior and the associated time characteristic of sub-behavior were used to represent behavior case. In the process of case-based reasoning, apart from considering the similarity of basic sub-behaviors,order factor was proposed to measure the similarity of a time order among the sub-behaviors and span factor was used to measure the similarity of duration time of each sub-behavior, which makes the similarity calculations more rational and comprehensive.Experimental results show the effectiveness of the proposed method in comparison with other related works and can run in real-time for the recognition of suspicious behaviors.
基金Supported by Major Development Program of Sichuan Province(18ZDYF1790)Key Technology R&D Program of Chengdu City(2015-HM01-00484-SF)the National Science and Technology Major Project(2018ZX100201AA-002-004)
文摘Online question and answer(Q&A)communities,which allow users to exchange knowledge by asking and answering questions,have become increasingly popular.As a result of user active participation,these communities store overwhelming volumes of information.However,existing related methods are unable to meet community operators’needs for analyzing multi-dimensional Q&A sequences and understanding user behavior.In this paper,collaborating with domain experts in online community,we present a system,VisQAC,which explores the patterns of Q&A sequence and user behavior.In the system,a novel visual design is proposed,which is combined with flexible mapping measures for analyzing critical characteristics of sequence data.Moreover,a timeline visualization method is designed to visualize data with categorical attributes and its correlation can be displayed flexibly by choosing time mode and time granularity.The usefulness and effectiveness of the system are demonstrated with several case studies of VisQAC with community operators based on the Zhihu dataset.Our evaluation shows that VisQAC is beneficial to the understanding of Q&A sequence and associated user behavior.
基金Projects(59374166,58974155) supported by the National Natural Science Foundation of China
文摘The downward moving behavior of pellets in a 8 m2 pellet shaft furnace with an internal vertical air channel and a drying bed was studied by means of a visualized model(1-15) and a top model(1-1).The visualized model experiment shows that the downward movement of pellets can be regarded as plug flow approximately inside the furnace except for the lower region of cooling zone due to the influence of the drained hopper.The top model experiment reveals that the pellet sizes increase along the moving direction because of the percolation phenomenon,which results in a decrease of the resistance coefficient and an increase of the gas flow rate from the furnace wall toward the furnace center.
文摘The study of defense behavior development in pied flycatcher altricial nestlings has shown that preceding visual deprivation decreased the capability to freeze in the young. At the same time, auditory thresholds of deprived nestlings were lower than those of the nestlings developing in unaltered visual environment. Our goal in the present work was to study effects of visual input on the functional development of neural circuitry for flycatcher’s acoustically-guided defensive behavior. We compared the immunohistochemical response of transcription factors ZENK and c-Fos in the nestlings’ auditory telencephalic structures in visually deprived and non-deprived flycatcher nestlings to alarm calls emitted by adult birds. We have demonstrated that the development of flycatcher nestlings under the conditions of limited visual afferentation results in the decrease of induction of the immediate-early genes c-Fos and ZENK in auditory structures of 9-day-old nestlings performing auditory-guided defense behavior. The most marked decrease of induction of both genes is observed in Field L. Our data suggest that visual afferentation affects neuronal activations in higher auditory structures of nestlings’ brain that, in turn, may increase the efficiency of species-typical alarm call. Thus, the work demonstrated for the first time that visual affererntation facilitates the growth of efficiency of alarm call affecting the activity of neurons in auditory integrative structures.
文摘Mechanisms of predator detection and the influence of the presence of nonlethal predators on antipredator defense behavior and metamorphic traits were studied in the Indian tree frog, Polypedates maculatus. Exposure of P. maculatus tadpoles to chemical cues of caged predator（crabs, Barytelphusa spp.） fed with either conspecific or heterogeneric tadpoles, or were starved elicited defense behavior（by avoiding predator zone） in them. Such a behavior was not evident when exposed to predators housed in a glass beaker（visual cues）. Both early（Gosner stage 27–28） and later（Gosner stage 35–36） stage tadpoles when exposed to caged predators（fed with conspecific tadpoles）, prey tadpoles spent less time swimming and remained motionless for longer periods. Yet, the time spent by prey in feeding was unaffected. Further, the predator avoidance behavior exhibited by them was of the same intensity regardless of whether the caged predators were fed or starved implying the influence of predator＇s kairomones. Tadpoles reared with caged predator reached the metamorphic climax stage（MC stage; Gosner stage 42） earlier than those reared without a predator. Size at emergence（Gosner stage 46） was comparable in both the groups. The findings suggest that P. maculatus tadpoles assess predation risk chiefly by sensing kairomones of the predator in eliciting antipredator defense behaviors. Accelerated development and early metamorphosis without any compromise of the size at emergence may be due to their unaltered feeding activity.
文摘Visual merchandising encourages customers to enter the store by making it appealing to them and influencing their perception of it. It is the art of putting together effective display designs and ideas in order to boost store traffic and sales. It’s also a way to engage with customers and influence their purchasing decisions. A fashion trend occurs when a particular item, silhouette, color, or other new look rises in popularity. It changes with the seasons, and the store serves as a hub for communicating these changes to potential customers. Because items must be sold within a certain time frame, several display tactics are used to best present the merchandise and communicate the current fashion trends to customers. Visual merchandising becomes a key aspect of difference from merchants in the same category as retail firms, particularly fashion brands, try to compete in an already saturated market. Effective branding is now a vital success component for all types of fashion firms. Fashion brands may use effective branding tactics to build equity, promote consumer brand loyalty, and increase profitability. Visual merchandising is critical for inferring various customers’ perspectives and adding value to businesses. Its major goal is no longer to make items appealing in order to sell them quickly;it is rather to stand out, develop the correct brand image, and give the greatest possible customer experience. Visual merchandising aspects, when employed correctly, can infiltrate the buyer’s brain and prompt them to generate a favorable opinion of the store, allowing it to leverage its brand image. In this context, this research review focuses and aims to study the link between visual merchandising and Apparel Fashion trends, to study the relationship between visual merchandising and fashion branding and to find out the research gaps and scope for future research directions in the area of visual merchandising applied in fashion apparel industry.
文摘为明确自动化初始信任水平对城市轨道交通驾驶任务接管绩效、工作负载和视觉行为的影响,设计并验证自动化初始信任问卷,使用问卷筛选显著初始信任水平被试进行模拟驾驶试验;通过记录常用制动和紧急制动时间反应接管绩效,使用NASA-TLX(national aeronautics and space administration task load index)问卷计算工作负载,并分别采集轨道路面和驾驶界面2个区域的扫视次数、总注视次数、注视时间和平均注视时间以分析视觉行为差异.试验结果表明:不同初始信任水平的参与者接管绩效不存在显著差异;高初始信任水平参与者相比低信任水平参与者整体工作负载低21.39%,身体负荷低34.24%和挫折程度低31.96%;初始信任水平显著影响视觉行为,低信任参与者趋向于活跃的视觉搜索行为,轨道路面的注视次数、轨道路面和驾驶界面的扫视次数分别高出28.14%、41.78%和42.91%;而高信任参与者趋向于固定的视觉凝视行为,轨道路面的平均注视时间高出40.74%.研究可为城市轨道交通驾驶安全干预提供理论参考和实践依据.
