Hand-operated Device Research Articles

Sound-based remote real-time multi-device operational monitoring system using a Convolutional Neural Network (CNN)

Smart factory is the main keyword in the field of manufacturing processes about the fourth industrial revolution. To realize the smart factory, making all pieces of device into smart devices that are connected to the centralized system to enable a real-time exchange of information is essential. Sound can be efficient means to make devices as smart devices because sound can contain the status information of various devices simultaneously, and it can be recorded easily outside of a device using only a microphone. In this study, multi-device operation monitoring system by analyzing sound is developed. Mic arrays for acquiring the sound were installed at the outside the devices and recorded the sounds from several devices simultaneously. By analyzing the recorded sound with log-mel spectrogram and Convolutional Neuron Network (CNN), the system could detect the operational status of three devices with an accuracy of 71–92 %. To improve the performance, virtual data set was created by composition of individual device operating sounds of different intensities. With this virtual data set, accuracy can be enhanced to 87 % ∼ 99 % accuracy and, required sound data amount could be reduced. Developed system was applied successfully in monitoring experiments in two different environments: a workshop in which hand-operated device was used and a factory with a computer numerical control machine and verifying the performance.

CASE REPORT: The impact of Plasma Exeresis after fillers complication on the lips

The purpose of this article is to inform the medical audience about the treatment of difficult cases by implementing the Plasma Exeresis method. With the particular device of Plasma Exeresis the fourth state of matters, Plasma, is produced. In brief, Plasma Exeresis is a certified cordless micro-surgical hand-operated device. According to the histology results, Plasma Exeresis sublimates the epidermis without passing the membrane basal, shrinking the elastic fibers of the dermis, and produces collagen type III without the unwanted skin lesion. In particular, by using Plasma Exeresis with the above mechanism we are able to rectify the fibrosis and granules (and other medical lesions e.g. xanthelasmas, hemangioma, non-invasive blepharoplasty, papilloma, fibroma, benign tumors, etc.). Furthermore, it accelerates the damage repair, the wrinkles softening and the skin fibers regeneration. The case study discussed below can be characterized for its hard and challenging nature, bearing in mind that the damage was extensive. The patient was a woman, 55 years old, who had undergone an unsuccessful treatment in the past. The case takes place in Greece. The culprit was the application of lip fillers consisted of an unknown material. The adverse effects (granules) (See pictures below) were combined with depressive disorder which lasted for approximately 15 years. The granules were considered by many doctors (even plastic surgeons) insurmountable, however, the Plasma Exeresis method was eventually highly effective. Consequently, the Plasma Exeresis can be considered as an innovative method which can heal and restore problematic cases. Keywords: Plasma Exeresis: Fillers; Complication; Lips; Side Effects; Granules Hypothesis 1: Plasma Exeresis can cure difficult cases

Two-point discrimination values vary depending on test site, sex and test modality in the orofacial region: a preliminary study

The two-point discrimination (TPD) test is one of the most commonly used neurosensory tests to assess mechanoperception in the clinical settings. While there have been numerous studies of functional sensibility of the hand using TPD test, there have been relatively not enough reports on TPD in the orofacial region. Objective The aims of the present study were to determine the normal values of TPD in the six trigeminal sites (the forehead, cheek, mentum, upper lip, lower lip, and the tongue tip) and to investigate the effect of the site, sex, and test modality on the TPD perception.Material and Methods Forty healthy volunteers consisting of age-matched men (20) and women (20) with a mean age of 27.1 years were recruited. One examiner performed the TPD test using a simple hand-operated device, i.e., by drawing compass with a blunt or sharp-pointed tip. The static TPD with a blunt-pointed tip (STPDB), moving TPD with a blunt-pointed tip (MTPDB), and static TPD with a sharp-pointed tip (STPDS) were measured. The predictors were the site, sex, and test modality, and the outcome variable was the TPD value. Three-way ANOVA was used for statistics.Results The analysis showed a significant effect of the site, sex and test modality on the TPD values. Significant differences between the test sites were observed with the descending order from the forehead and cheek>mentum>upper lip and lower lip>tongue tip and index finger. Women showed lower TPD values than those of men. The STPDS measurements were consistently lower than those of the STPDB and MTPDB.Conclusions The normal values of TPD in this study suggest that the cheek and forehead were less sensitive than other regions evaluated and women were more sensitive than men. The STPDS was the most sensitive test modality.

PD-06.10: LOTUS® vs. Harmonic Scalpel: A Controlled Pilot Study of Efficacy Ergonomics and Pathological Outcome in the Porcine Model

The Laparoscopic Operation by Torsional UltraSound (LOTUS®) version 3 device is a new hand-operated device for dissection and vessel sealing during laparoscopic surgery. Advantages over traditional devices including the Ethicon Harmonic Shears (ACE®) may include: improved speed of clinical application and hand unit ergonomics. We investigated these properties in the porcine model.

A device for simultaneous determination of the impact resistance and hardness of insulating coatings of pipelines

We propose a hand-operated device for simultaneous determination of the impact resistance and hardness of anticorrosive insulating coatings, which completely models the work of a U-1 standard vertical impact testing machine. The proposed device is a prototype of the Poldi impact hardness gauge, however, unlike the latter, our device is used with a hammer of mass 1 kg, which equates it to the U-1 impact testing machine and enables one to determine simultaneously the hardness and impact resistance of protective coatings. When the hammer strikes, the indenter contacts simultaneously with the coating and indicator metal (a square bar), which has been calibrated on the U-1 impact testing machine and a stationary hardness gauge. This calibration results in a relation between the diameter of indentation and the energy of impact with a one-kilogram weight. Striking upon our device with a one-kilogram weight, measuring the diameter of indentation on the bar, and using the relation mentioned above, we can find the impact resistance, and the ratio between the diameters of indentations on the bar and coating enables us to determine its hardness according to GOST 18661-73.

한국인의 손 치수 및 특성에 관한 연구

A variety of research has been conducted on anthropometric dimensions and their applications to various products and space architecture, Also robust research has been conducted on various parts of human body and the possibility of applications. However, research on the specific dimensions regarding fingers and characteristics of hands have rarely been conducted in Korea. In addition, except for the NASA Anthropometric Source Book that suggests measures for specific purposes such as gloves and hand-operated device, almost no literature can be found on this topic, The primary objective of this study was thus to provide anthropometric dimensions of Korean hands and fingers and recommend appropriate product design solutions for human hands. Six hundred Korean male and female subjects aging from 11 to 93 were selected, Thirteen different hands and fingers were measured along with demographic data(e.g., age, stature, weight} to determine the relationships among these obtained data, The results of this study should be considered in ergonomic design for every hand-used products and hand-operated control devices.

An inexpensive hand-operated device for cutting core liners

A simple hand-operated device for cutting longitudinal sections of core liners has been developed at a very low cost. The liner is placed on a stand and secured properly by circular plates and tightening levers. Two high-speed steel blades situated in diametrically opposite direction are pressed tightly on the liner. By rotating a handle these blades move to cut both sides of the liner simultaneously. For cross-sectioning the core liner another simple hand-operated instrument has been illustrated. The liner is fixed in a stationary ring by tightening screws. An adjustable lever with a high-speed steel blade is fixed on a tool holder and welded to an outer ring which is rotated 180° by a handle to cut the liner. The cut portions are smooth, perfect and straight and the operation is very simple and safe.

A New Apparatus for Collecting Simultaneous Water Samples in the Surf Zone

ABSTRACT A new water sampler for determining short period suspended sediment fluctuations in the surf zone has been designed in which simultaneous serial samples are collected in a vertical line above the bed. The hand-operated device consists of a mounting pole, bottle support brackets and Van Dorn-type bottles closed by hinged doors. Closely spaced samples can be collected at precise distances above the bed, as low as 10 cm. Relatively rapid flushing time of the bottles and fast response time of the apparatus allows detection of short period changes in suspended sediment concentration. The apparatus has been used successfully in breaking waves up to 150 cm high, under all conditions typical to the South Carolina coast.