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In this letter, we report the development of a viscometer by utilizing a vision-based sensing method. The experimental arrangement includes a cylindrical transparent container with a capillary tube at its bottom and a white cardboard with a vertical black line positioned behind the container. As the liquid sample flows through the capillary tube, the original black line reappears above the meniscu...Show More
The surge in demand for latency-sensitive services has propelled network distance measurement to the forefront of networking research. Utilizing the low-rank structure of full network data, the tensor completion method can efficiently estimate network distance from partially sampled distance data measured from a small set of node pairs. However, its performance is affected by sampling algorithm li...Show More
This paper presents an extended BLUE filter with Pitot tube and windspeed measurements. Though widely used in aviation, Pitot tube is ignored by scholars because it only measures the speed of an aircraft relative to the air. Investigation shows the linear combination of Pitot tube and windspeed measurements can yield aircraft velocity estimation to improve performance. After a thorough analysis of...Show More
The behavior of two limestones in CO2 looping cycles and the morphology of calcines after different cycles are presented here. The CO2 cycles were performed in tube furnaces and the resulting samples were observed by a scanning electron microscopy. The sorbents surface area, porosity and pore size distribution were tested by nitrogen adsorption/desorption. It was found that the pore distribution s...Show More
X-ray grating interferometry, as a powerful nondestructive imaging tool in fields like biology and medical tests, works well with conventional X-ray tubes, and provides three kinds of information, the attenuation image, the phase-contrast image and the dark field image, with higher contrast. However, the limited field of view of the sample due to the limited size of gratings and detector hinders t...Show More
A covariance alignment and collaborative representation-based classification with Tikhonov regularization based method (CACRT) is proposed to utilize historical training samples to classify new hyperspectral images. Specifically, the new hyperspectral image and the historical hyperspectral image are preprocessed by spectral matching and covariance alignment. Then the corresponding categories are s...Show More
This paper presents a state-of-the-art planar microwave sensor designed for highly precise alcohol characterization in aqueous solutions, with a primary focus on its application in COVID-19 disinfectants. Modified from the Jerusalem patch, the sensor operates at 5.58 GHz, achieving a unique balance between heightened sensitivity and cost-effectiveness. A tailor-made 3D-printed case minimizes error...Show More
We introduce a method for task-oriented design of concentric tube robots, which are tentacle-like robots with the potential to enable new minimally invasive surgical procedures. Our objective is to create a robot design on a patient-specific and surgery-specific basis to enable the robot to reach multiple clinically relevant sites while avoiding anatomical obstacles. Our method uses a mechanically...Show More

Damage Induced by Hydroxyl Radicals Generated in the Hydration Layer of γ-Irradiated Frozen Aqueous Solution of DNA

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Journal of Radiation Research
Year: 1996 | Volume: 37, Issue: 3 | Journal Article |
Aqueous DNA solutions with or without the spin trap α-phenyl-N-tert-butylnitrone (PBN) were exposed to γ-rays at 77 K. After thawing the solutions, three experiments were carried out to confirm the generation of OH radicals in the hydration layer of DNA and to examine whether they act as an inducer of DNA strand breaks and base alterations. Observation with the ESR-spin trapping method showed ESR ...Show More

Damage Induced by Hydroxyl Radicals Generated in the Hydration Layer of γ-Irradiated Frozen Aqueous Solution of DNA

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Year: 1996 | Volume: 37, Issue: 3 | Journal Article |
Concentric Tube Robots (CTR) have been gaining ground in minimally-invasive robotic surgeries due to their small footprint, compliance, and high dexterity. CTRs can assure safe interaction with soft tissue, provided that precise and effective motion control is achieved. Controlling the motion of CTRs is still challenging. Commonly used model-based control approaches often employ simplified geometr...Show More
This paper presents several small research vessel-based deep-towed seafloor sampling systems developed by the Institute of Undersea Technology (IUT) at National Sun Yat-sen University. First of all, the paper presents the Video-guided Multi-Corer (V-Corer) and the TV-Grabber (TVG). The V-Corer and the TVG can be used for video-guided seafloor sampling through a small research vessel, such as RV Oc...Show More
To meet the needs of positive and negative identification of biological reagents, a set of color recognition App based on Android platform is developed, which mainly uses OPENCV and machine learning technology to realize the main functions of tube positioning, color extraction and classification. The development of the system lays a foundation for the establishment of real-time reagent identificat...Show More
In this paper, we report an investigation on estimation of chemical concentration by using computer vision-based image processing techniques. Eleven liquid samples have been prepared by mixing copper (II) sulphate salt with distilled water with their concentrations varying from 0.0 - 1.0M (molar concentration). Images of the colored chemical solutions, kept in transparent test tubes, are acquired ...Show More
The conceptual design of a novel, outward-flowing, cylindrical laminar flame multifuel combustor, expected to produce ultrahigh temperature uniformity and low pollutant emissions, is presented. A stretched laminar tubular flame was established by injecting a lean gaseous fuel air mixture uniformly in the radial direction from a central porous tube into an annular combustion space formed by an oute...Show More
Sediment cores are gathered to collect data on seabed chemical and mineral composition. This paper reviews the process of designing and testing a purely mechanical sediment sampler for use at hadal depths. These samples are important in determining the health of the surrounding environment and give us insight into what organisms currently live or have lived on or under the seabed. Sediment samples...Show More
Lung cancer is one of the deadliest types of cancer, and early diagnosis is crucial for successful treatment. Definitively diagnosing lung cancer typically requires biopsy, but current approaches either carry a high procedural risk for the patient or are incapable of reaching many sites of clinical interest in the lung. We present a new sampling-based planning method for a steerable needle lung ro...Show More
This article presents a novel method to measure the exposure time of digital cameras. The measurement relies on a sequence of images taken by the camera in video mode, using the effect of equivalent sampling. The hardware requirements of the proposed method are low: a signal generator drives an LED source and the blinking LED is recorded by the camera under test. The exposure time is determined fr...Show More
This article deals how to design a complete e-bike controller system by STM32 chip microcomputer. The circuit is mainly used for controlling the brushless DC motor, when we design the power inverted circuit, we usually check resistors voltage to detect the current and then send the data to CPU to complete the current closed loop system. However, when the controller is used in high power levers, th...Show More
To ensure the accuracy of measuring the refractive indices of liquids, the quality of which is determined, all refractometric instruments undergo a calibration procedure to reduce the calibration error, which is up to $70 \%$ of the basic error. In some cases, it is necessary to carry out the calibration procedure under ideal conditions, avoiding sudden temperature changes, since the refractive in...Show More
Various model-based control methods are currently used in control of piezoelectric tubes, others such as internal model control and model predictive control are anticipated to be employed soon. All these control systems are designed based on black box models. However, systematic black box modeling of piezoelectric tubes has been overlooked in the literature to a large extent or has been presented ...Show More
This paper presents a compensation method of light source dynamic to improve a measurement stability of sample's light transmittance using our fiber optic-based sensor. In principle, dynamic input and transmitted lights are measured for insertion loss calculation of an empty tube. The loss is compensated in the actual light transmittance calculation of a solution sample. Comparison experiments wer...Show More
Image segmentation is an essential prerequisite task for the defect detection approach. To improve the performance of defect detection in copper tube welding areas, a contour-based instance segmentation method is presented in this study. The proposed method is a coarse-to-fine process and it can be divided in two stages. Firstly, the coarse contour of welding areas is generated by learnable initia...Show More
The personal information encoded in genomic DNA should not be made available to the public. With the increasing discoveries of new genes, it has become necessary to establish a security system for personal genome information. Although many security systems that are applied for electrical information in computers have been developed and established, there is no security system for information at DN...Show More
Concentric tube continuum robots utilize nested tubes, which are subject to a set of inequalities. Current approaches to account for inequalities rely on branching methods such as if-else statements. It can introduce discontinuities, may result in a complicated decision tree, has a high wall-clock time, and cannot be vectorized. This affects the behavior and result of downstream methods in control...Show More
In recent years, small and medium size generators are used as engine generators. The authors aim to develop enamelled wire that exceeds conventional resin insulation lifetime. Among nanocomposite materials, boehmite-based materials are reported to have a longer lifetime than silica-based materials, and they are expected as new insulating materials for enamel wire insulation layer. In this paper, w...Show More