Wi-Fi decreases melatonin protective effect and increases hippocampal neuronal damage in pentylenetetrazole induced model seizures in rats

AimEpilepsy is a common brain disorder in which the seizures could cause a neuronal loss in the hippocampus. Oxidative stress has an important role in the pathology of epilepsy. Some studies indicate that Wi-Fi increases oxidative stress and suppresses antioxidant systems. The aim of this study is to investigate the effect of Wi-Fi on melatonin anticonvulsive effect and oxidative damage in pentylenetetrazole-induced epileptic seizures in rats.MethodsIn our study, we used 30 male Wistar Albino rats, 230?250 grams of the body weight. The animals were divided into five groups as control, saline (1 ml/kg/day olive oil for 30 days), Wi-Fi (12 h/day for 30 days), melatonin (10 mg/kg/day for 30 days) and melatonin + Wi-Fi (10 mg/kg/day +12 h/day for 30 days). In the thirtieth day, thirty minutes after the last drugs administration at the indicated doses, PTZ in 45 mg/kg was administered to induce epileptic seizure. The animals were observed for 30 min during the seizure stages (according to the Racine Scale) and first myoclonic jerk times (FMJ). Twenty-four hours after PTZ injection, brain tissues were removed for biochemical and histopathological evaluation. The hippocampal Cornu Ammonis (CA) 1, CA3 and DG (dentate gyrus) regions were histopathologically evaluated in terms of a neuronal damage in addition that oxidative stress markers (total antioxidant status (TAS), total oxidant status (TOS) and oxidative stress index (OSI)) were measured in brain tissues.ResultsWi-Fi was not found to affect behavioral changes associated with epilepsy (p > 0.05). However, Wi-Fi reduced anticonvulsive and antioxidant effect of melatonin (p < 0.05). Moreover, Wi-Fi increased neuronal damage in hippocampus (p < 0.05).ConclusionWi-Fi did not directly affect epileptic seizures. Nevertheless, it inhibits the positive effects of melatonin on epilepsy and it also has negative effects on hippocampal neuronal damage. These effects of Wi-Fi may occur via oxidative pathways.     

移动设备管理系统在医院中的应用

目的：解决医院移动医疗中使用的移动推车、掌上电脑（PDA）及平板电脑等移动终端设备的管理问题,将移动设备管理纳入智能化管理模式。方法：根据医院自身特点,选择适合医院使用的移动设备管理系统。结果：该系统能够管理所有主流操作系统和终端设备,实现了医院移动终端设备的软件、硬件及资产管理。结论：移动设备管理系统提高了设备管理水平,减轻了维护人员的工作量,降低了运维成本。     

浅谈无线网络在医院的部署应用

医疗行业受到时代的冲击。无线技术在医疗行业中的应用被赋予了新的内涵。就目前在国内医疗领域热点的无线网络（移动医疗）平台的部署、搭建、应用等方面进行初探,充分说明了无线网络在医疗行业的可行性。     

Does prolonged radiofrequency radiation emitted from Wi-Fi devices induce DNA damage in various tissues of rats?

Wireless internet (Wi-Fi) providers have become essential in our daily lives, as wireless technology is evolving at a dizzying pace. Although there are different frequency generators, one of the most commonly used Wi-Fi devices are 2.4 GHz frequency generators. These devices are heavily used in all areas of life but the effect of radiofrequency (RF) radiation emission on users is generally ignored. Yet, an increasing share of the public expresses concern on this issue. Therefore, this study intends to respond to the growing public concern. The purpose of this study is to reveal whether long term exposure of 2.4 GHz frequency RF radiation will cause DNA damage of different tissues such as brain, kidney, liver, and skin tissue and testicular tissues of rats. The study was conducted on 16 adult male Wistar–Albino rats. The rats in the experimental group (n = 8) were exposed to 2.4 GHz frequency radiation for over a year. The rats in the sham control group (n = 8) were subjected to the same experimental conditions except the Wi-Fi generator was turned off. After the exposure period was complete the possible DNA damage on the rat’s brain, liver, kidney, skin, and testicular tissues was detected through the single cell gel electrophoresis assay (comet) method. The amount of DNA damage was measured as percentage tail DNA value. Based on the DNA damage results determined by the single cell gel electrophoresis (Comet) method, it was found that the% tail DNA values of the brain, kidney, liver, and skin tissues of the rats in the experimental group increased more than those in the control group. The increase of the DNA damage in all tissues was not significant (p > 0.05). However the increase of the DNA damage in rat testes tissue was significant (p < 0.01).In conclusion, long-term exposure to 2.4 GHz RF radiation (Wi-Fi) does not cause DNA damage of the organs investigated in this study except testes. The results of this study indicated that testes are more sensitive organ to RF radiation.     

基于低功耗ARM的物联网Wi—Fi接人方案设计与实现

目的：设计一种低功耗物联网Wi—Fi接入方案,便于传感器网络接入互联网。方法：采用低功耗ARM作为主控芯片．驱动Marvell88W8686网卡芯片,并移植LWIP（轻量型2TCP／IP）协议,共同实现wi—Fi网络的加网、建立TCP连接、发送数据等一系列工作。结果：经测试,本系统可快速连接wi—Fi网络,最大发送电流在170mA以内,灵敏度为一85dBm。结论：该系统具有功耗低、速度快、支持多协议等优点,非常适合应用于物联网网关以及传感器节点的设计方案中．具有广阔的发展空间。     

A Dual-Band Conformal Antenna Based on Highly Conductive Graphene-Assembled Films for 5G WLAN Applications

Flexible electronic devices are widely used in the Internet of Things, smart home and wearable devices, especially in carriers with irregular curved surfaces. Light weight, flexible and corrosion-resistant carbon-based materials have been extensively investigated in RF electronics. However, the insufficient electrical conductivity limits their further application. In this work, a flexible and low-profile dual-band Vivaldi antenna based on highly conductive graphene-assembled films (GAF) is proposed for 5G Wi-Fi applications. The proposed GAF antenna with the profile of 0.548 mm comprises a split ring resonator and open circuit half wavelength resonator to implement the dual band-notched characteristic. The operating frequency of the flexible GAF antenna covers the Wi-Fi 6e band, 2.4–2.45 GHz and 5.15–7.1 GHz. Different conformal applications are simulated by attaching the antenna to the surface of cylinders with different radii. The measured results show that the working frequency bands and the radiation patterns of the GAF antenna are relatively stable, with a bending angle of 180°. For demonstration of practical application, the GAF antennas are conformed to a commercial router. The spectral power of the GAF antenna router is greater than the copper antenna router, which means a higher signal-to-noise ratio and a longer transmission range can be achieved. All results indicate that the proposed GAF antenna has broad application prospects in next generation Wi-Fi.     

无线网络通讯技术在健康管理中的应用

本文阐述了蓝牙、802.11（Wi-Fi）、IrDA、UWB（Ultra Wideband）、ZigBee等5种常见无线通讯技术的特点及其在医疗行业中的应用,在此基础上结合个性化健康管理的规模化、信息化特点对无线通讯技术在健康管理的三个阶段中（健康检测、健康跟踪、健康干预）的应用做了展望。     

Radiofrequency radiation emitted from Wi-Fi (2.4 GHz) causes impaired insulin secretion and increased oxidative stress in rat pancreatic islets

Purpose: There is a great concern regarding the possible adverse effects of electromagnetic radiation (EMR). This study investigated the effects of EMR induced by Wi-Fi (2.45 GHz) on insulin secretion and antioxidant redox systems in the rat pancreas.

Materials and methods: Adult male Sprague–Dawley rats in the weight range of 230–260?g were divided into control, sham, Wi-Fi exposed groups. After long-term exposure (4?h/day for 45 days) to Wi-Fi EMR, plasma levels of glucose and insulin during intraperitoneal glucose tolerance test were measured. Islet insulin secretion and content, lipid peroxidation, and antioxidant status in pancreas of rats were determined.

Results: Our data showed that the weight gain in the WI-FI exposed group was significantly lower than the control group (p?Wi-Fi (2.45?GHz)-exposed group showed hyperglycemia. Plasma insulin level and glucose-stimulated insulin secretion from pancreatic islet were significantly reduced in the Wi-Fi-exposed group. EMR emitted from Wi-Fi caused a significant increase in lipid peroxidation and a significant decrease in GSH level, SOD, and GPx activities of the pancreas.

Conclusions: These data showed that EMR of Wi-Fi leads to hyperglycemia, increased oxidative stress, and impaired insulin secretion in the rat pancreatic islets.     

The Enhanced Workflow and Efficiency of the Wireless Local Area Network (WLAN)-Based Direct Digital Radiography (DDR) Portable Radiography

With the implementation of the PACS in the hospital, there is an increasing demand from the clinicians for immediate access and display of radiological images. Recently, our hospital has installed the first wireless local area network (WLAN)-based direct digital radiography (DDR) portable radiography system. The DDR portable radiography system allows wireless retrieval of modality worklist and wireless transmission of portable X-ray image on the console to the Picture Archiving and Communication System (PACS), via WLAN connection of wireless fidelity (Wi-Fi). The aim of this study was to analyze the workflow and performance between the WLAN-based DDR portable radiography system and the old practice using conventional portable X-ray machine with computed radiography (CR) system. A total of 190 portable chest X-ray examinations were evaluated and timed, using the conventional portable X-ray machine with CR from March to April of 2012 and using the new DDR portable radiography system on December of 2012 (n = 97 for old system and n = 93 for DDR portable system). The time interval of image becoming available to the PACS using the WLAN-based DDR portable radiography system was significantly shorter than that of the old practice using the conventional portable X-ray machine with CR (6.8 ± 2.6 min for DDR portable system; 23 ± 10.2 min for old system; p < 0.0001), with the efficiency improved by 70 %. The implementation of the WLAN-based DDR portable radiography system can enhance the workflow of portable radiography by reduction of procedural steps.     

移动DR设备Wi-Fi遥控延时曝光装置的设计与应用

目的本研究针对移动DR设备提出一种Wi-Fi遥控延时曝光装置,以避免医护人员受X射线的照射、提高移动DR的工作效率。方法用市场上较为普及的智能手机发送曝光指令,用Wi-Fi传输遥控信号,用单片机控制延时时间,实现一键Wi-Fi遥控延时曝光。结果当在手机APP上发出曝光指令,蜂鸣器立即报警,提示患者做好闭气等准备工作;2 s后移动DR设备的预备档吸合,3.5 s后曝光档吸合,4.5 s后完成X射线摄片,同时蜂鸣器停止报警。遥控信号稳定,延时控制精确。结论该装置相较于传统的移动DR设备曝光装置,具有工作效率高、性能稳定和更加安全等优点,有较好的推广应用价值。