As the explosive growth of ISM band usage continues, there are many scenarios where different systems operate in same place at time. One growing concerns is coexistence wireless [18]. For successful deployment mission-critical such as sensor networks, it required to provide a solution for coexistence. In this paper, we propose new scheme using multiple radio channels 802.15.4 LRWPAN and 802.11b WLAN. To evaluate effectiveness proposed scheme, measurement simulation study conducted. The...

As we grow old, our desire for independence does not diminish; yet health increasingly needs to be monitored. Injuries such as falling can a serious problem the elderly. If person falls and is able get assistance within an hour, casualties arising from that fall result in fatalities early 6 months later. It would seem then choice between safety must made. Fortunately, care technology advances, simple devices made detect or even predict elderly, which could easily save lives without too much...

Due to the explosive growth in number of users who rely on their phones and tablets for more daily interactions, protecting user's private information mobile devices is extremely important these days. To address limitations conventional authentication methods such as PIN or password-based security schemes, there has been a growing interest developing based characteristic biometric features fingerprint, iris, face, voice, gait. In particular, much attention devoted use human gait patterns due...

In this paper, we propose energy efficient schemes for data dissemination in sensor networks. Our are based on a hierarchical model. The scheme (HDDS) leverages the fact that nonuniform grid can be constructed to disseminate sink density without any prior information about position of sinks. This approach seems promising as preliminary experimental results show an average savings 10-30% achieved using our schemes. Even with large number sources and sinks, scale well yielding high...

Total knee arthroplasty is a common surgical treatment for end-stage osteoarthritis of the knee. The majority existing studies that have explored relationship between recovery and gait biomechanics been conducted in laboratory settings. However, seamless parameter monitoring real-world conditions may provide better understanding post-surgery. purpose this study was to estimate kinematic kinetic variables using two ankle-worn wearable sensors individuals after unilateral total arthroplasty....

Due do the various requirements of sensor applications, it is desired to design a neighbor discovery protocol that supports both symmetric and asymmetric duty cycles. This letter proposes new block-based for networks by adapting theory balanced incomplete block designs Chinese remainder theorem. Through simulation study, demonstrated proposed outperforms other methods, such as Disco, U-Connect, SearchLight, Hedis, Todis.

In this paper, we present a comparison of four wireless sensor network protocols: MultiHopRouter, TinyAODV(Ad-hoc On-demand Distance-Vector), GF (Greedy Forwarding), and GF-RSSI Forward with Received Signal Strength Indication). Performance measurement was conducted on testbed for medical application research. Based our measurements, performs well in various operating conditions. Especially, it shows high success rate packet delivery moderate energy consumption.

Total knee arthroplasty is a common surgical treatment to improve ambulatory function for individuals with end-stage osteoarthritis of the knee. Functional and self-reported measures are widely used assess functional ability impairment before after treatment. However, clinical assessments have limitations often provide subjective limited information. Seamless gait characteristic monitoring in real-world condition viable alternative address these limitations, but effectiveness using wearable...

Gait-based classification has gained much interest as a possible authentication method because it incorporate an intrinsic personal signature that is difficult to mimic. The study investigates machine learning techniques mitigate the natural variations in gait among different subjects. We incorporated several algorithms into this using data mining package called Waikato Environment for Knowledge Analysis (WEKA). WEKA's convenient interface enabled us apply various sets of understand whether...

care, accurate location information of mobile medical devices and personnel (e.g. patients or physicians) is often a major challenge. In this paper, we present real-time asset tracking system deployed within hospital clinic setting, which tracked set assets using small Wi- Fi tags. The utilized radio signals received from wireless access points to estimate tagged assets. performed with resolution 1.5 meters, an acceptable range in such environment. We developed web-based graphical interface...

The assessment of a person's ability to consistently perform the fundamental activities daily living is essential in monitoring patient's progress and measuring success treatment. Therefore, many researchers have been interested this issue proposed various systems based on accelerometer sensors. However, few focus energy consumption sensor devices. In paper, we introduce an energy-efficient physical activity system using wearable wireless sensor. capable most human body: standing, sitting,...

Falls on a ship cause severe injuries, and an accident falling off board, referred to as “man overboard” (MOB), can lead death. Thus, it is crucial accurately timely detect the risk of falling. Wearable sensors, unlike camera radar are affordable easily accessible regardless weather conditions. This study aimed identify fall level (i.e., high low risk) among individuals board using wearable sensors. We collected walking data from accelerometers during experiment by simulating ship’s rolling...

In this paper, based on coding theory concepts, a new time scheduling algorithm for multihop packet radio networks is described. Each mobile host assigned word from an appropriate constant weight code of length n, distance d and w. The can send message at the j/sup th/ slot provided has 1 in bit. proposed better than previously known algorithms terms minimum system throughput. also preserves other desired properties, such as topology independence, guaranteed throughput, bounded maximum...

To keep pace with today's computer and technology-driven workforce, strategies that spark foster student interest in science during the K-12 years are sorely needed. Thus it is essential teachers at these formative able to provide successful learning experiences computing. We an overview of Strategic Problem-based Approach Rouse Computer Science (SPARCS) project being conducted University Nebraska Omaha. SPARCS aims help middle school incorporate lessons into classes they teach, inspire...

The walkability of a neighborhood impacts public health and leads to economic environmental benefits. condition sidewalks is significant indicator walkable as it supports encourages pedestrian travel physical activity. However, common sidewalk assessment practices are subjective, inefficient, ineffective. Current alternate methods for objective automated surfaces do not consider pedestrians’ physiological responses. We developed novel classification framework the detection irregular walking...

The neighbor discovery protocol (NDP) is one of the critical research subjects in wireless sensor networks (WSNs) for efficient energy management nodes.A block design concept can be applied to find a schedule that guarantees at least common active slot between any pair nodes.However, design-based solutions literature are not flexible enough because cannot support asymmetric asynchronous operations.In this paper, we introduce new approach combines two optimal designs using OR...

Several MAC protocols have been proposed for wireless sensor networks (WSNs). These include T-MAC, D-MAC and the more commonly utilized SMAC. In this paper, we propose a new layer approach to support mobility in WSNs. The technique utilizes an adaptive frame size overcome effect of losses caused by Doppler shifts under mobile scenarios. An extended Kalman filter is used predict each transmission, which also directly enhances energy efficiency system. Our results show that based on predictor...

This paper introduces an on-going research for developing a dynamic path planning system to improve mobile robot navigation in building construction site by integrating set of sensor-equipped robots into real-time indoor positioning system. In the proposed system, communication between robot, ultrawideband (UWB) position and portable computer is implemented over wireless LAN. The location data from UWB sensor network enables accurate visual representation be displayed 3D CAD drawing manner....

During the initial deployment time, wireless sensors continually search their neighbors. The neighbor discovery is not an one-time event because network topology can be changed anytime due to node mobility and failure. protocol helps sensor nodes find neighboring within communication range. This study proposes a novel called prime-number-assisted block-based protocol, which intelligently changes schedules based on greater common divisor of two sensors’ cycle lengths. For example, for whose...

넘어짐은 노인이나 산업현장에서 일하는 사람들에게 심각한 부상을 일으키는 원인이 되기 때문에 센서를 사용하여 넘어짐을 판단하고자 하는 연구가 활발히 진행되고 있다. 최근 들어 스마트폰의 보급이 일반화 되면서 스마트 폰에 내장된 판단하는 방법이 연구되고 가속도 센서에서 추출된 가속도벡터의 변화량을 분석하면 어렵지 않게 판단할 수 있지만, 넘어지는 방향을 판단하기 위해서는 크기의 변화나 방향으로의 변화로 어렵다. 일반적으로 벡터의 방향은 물체의 움직임의 의미하지 않기 때문이다. 한편, 속도 벡터는 물체가 움직이는 방향의 접선방향으로 나타나는 성질을 방법을 제안하였다. Fall-related injuries are the most common cause of accidental death for elderly and frequent work-related in construction sites. Due to growing popularity smartphones, there has...