background and purpose: many workers are exposed to workplace hazards. many occupational diseases are preventable by personal protective devices (ppds). though many workers do not use ppds or their protection by ppds is not sufficient. this study was designed to assess the quality of ppds usage among industrial workers. materials and methods: in a cross-sectional study, 648 workers from four ma...

Air-film damping, which dominates over other losses, plays a significant role in the dynamic response of many micro-fabricated devices with a movable mass suspended by various bearing mechanisms. Modeling the damping characteristics accurately will be greatly helpful to the bearing design, control, and test in various micromotor devices. This paper presents the simulated and experimental squeez...

This article considers a hypothetical imaging device with a spinning slat collimator that measures parallel-planar-integral data from an object. This device rotates around the object 180 degrees and stops at N positions uniformly distributed over this 180 degrees. At each stop, the device spins on its own axis 180 degrees and acquires measurements at M positions uniformly distributed over this ...

A Microfactory is a new concept for an extremely miniaturized manufacturing facility that enables dramatic space and energy conservation. As a material transfer and assembly component of a prototype Microfactory, a micro transfer arm that provides 4 DOF and a maximum length of approximately 100mm has been developed. To achieve a compact-lightweight structure, large workspace and positioning acc...

Silicon, the main constituent of microprocessor chips, is emerging as a promising material for the realization of future quantum processors. Leveraging its well-established complementary metal-oxide-semiconductor (CMOS) technology would be a clear asset to the development of scalable quantum computing architectures and to their co-integration with classical control hardware. Here we report a si...

The article describes a device based on the holographic method for measuring parameters of dispersed aerosols. In proposed device, measured particle is irradiated with two beams perpendicular to main radiation axis, while resulting image in each projections gives an increased amount information (in contrast existing solutions) about particles. obtained processed layer by using digital holograph...

In this paper, we propose the portable automatic conjecturing and announcing system for real-time accident detection. There are six sensors with 3-axis accelerometers and the ZigBee transmission standard mounted on the patients' specific region. After being transmitted to the mobile device through the ZigBee devices, the data are analyzed immediately. When the accident occurs, the mobile device...

This paper demonstrates a method for activity recognition partially resilient on mobile device orientation, by using data from a mobile phone embedded accelerometer. This method is partially resilient on mobile device orientation, in such a way that a mobile device can be rotated around only one axis for an arbitrary angle. The classifier for activity recognition is built using data from one de...

In this paper, we propose a mobile physiological sensor that works with an indoor positioning system based on a wireless sensor network. The physiological sensor is a small, mobile, multi-sensor device which includes electrocardiograph, 3-axis accelerometer, barometer, thermometer, and hygrometer. In addition, the device is a network node of a wireless sensor network and receives beacon signals...

The main goal of this article is to present the design, technical development, and preliminary validation of an innovative mechatronic device for force/torque measurements taken from the human foot using pilot data. The device, formed by a mobile platform equipped with two six-axis force/torque sensors, was used to perform accurate quantitative measurements during isometric exercises, aimed at ...