4 research outputs found
A Robust and Energy-efficient Object Tracking Algorithm for a Wireless Sensor Network
No full textAbstractThis paper extends the work in [3] by introducing the border finding process to reduce the energy consumption. The objective of this work is to track a moving sensor node by using information from a group of binary sensor nodes measuring whether the moving node is moving toward or away. In [3], every sensor node sends observations to central processing unit. In this work, we use border finding process to limit the amount of communication and energy consumption since from [1], the border nodes where the observations changes from moving toward to moving away, or vice versa, contain useful information in finding the location of moving node. This process based on neighboring information that can be used to confirm whether the asking node is border node between two groups of data or not. After that, support vector machine (SVM) is in charge of classifying group of data and then particle filter is used to track the moving object follow the direction of vector perpendicular to the optimal hyper plane of support vector machine
Characterizations of Elephant Endotheliotropic Herpesvirus Type 1A and 4 Co-Infections in Asian Elephant (Elephas maximus) Calves
No full textThree cases of double infection with elephant endotheliotropic herpesvirus (EEHV) types 1A and 4 in captive Asian elephants are presented. The first calf was a 4-year-old female that showed initial signs of lethargy and depression. The second calf was a 6-year-old female that displayed signs of depression and diarrhea and died within 48 h of the start of supportive treatment. The third was a 2-year-old male that died suddenly while living with the herd. Necropsies were performed in the first and second elephants, while only a tongue sample was collected from the third calf. EEHV infection was confirmed via quantitative PCR (qPCR) and gene sequencing, revealing double subtypes of EEHV1A and -4 infections. This study describes the hematological and pathological characteristics within the host following double EEHV infection
Dexmedetomidine Effectively Sedates Asian Elephants (Elephas maximus)
No full textThis study investigated the sedative effects of dexmedetomidine in Asian elephants. We hypothesized that 2 µg/kg dexmedetomidine would provide sufficient standing sedation. A crossover design study was performed in three Asian elephants. Each elephant was assigned to 1 of 3 treatment groups—1 (D1), 1.5 (D1.5) or 2 (D2) µg/kg dexmedetomidine (intramuscular injection, IM) with a two-week ‘washout period’ between doses. Elephants were monitored for 120 min. At 120 min (Ta), atipamezole was administered IM. Sedation and responsiveness scores were evaluated. Physiological parameters (pulse rate, respiratory rate, and %SpO2) and clinical observations were monitored during the study and for 3 days post drug administration. D2 provided the longest sedation (approximately 70 min), compared to D1 and D1.5. After Ta, each elephant’s sedative stage lessened within 10–15 min without complications. No significant abnormal clinical observations were noted throughout and during the 3-days post study period. These data suggest that a single 2 µg/kg IM dexmedetomidine injection provides sufficient standing sedation for approximately 70 min in Asian elephants
