A new type of geophone, Eddy‐Seis: Theoretical study of its response characteristics and method of testing

1986 ◽  
Author(s):  
Takashi Kanemori ◽  
Ernest M. Hall
Keyword(s):  
Theoretical Study ◽  
Response Characteristics ◽  
New Type

The structural and functional development of the retina in larval Xenopus

Development ◽  
1975 ◽  
Vol 33 (4) ◽  
pp. 915-940
Author(s):  
S. H. Chung ◽  
R. Victoria Stirling ◽  
R. M. Gaze
Keyword(s):  
Ganglion Cells ◽  
Single Layer ◽  
Plexiform Layer ◽  
Distinct Pattern ◽  
Inner Plexiform Layer ◽  
Retinal Ganglion ◽  
Response Characteristics ◽  
Functional Development ◽  
New Type ◽  
Plexiform Layers

The structural transformations of the larval Xenopus retina at successive stages of development, and concomitant changes in response characteristics of retinal ganglion cells, were studied using histological and electrophysiological techniques. The first sign of visually evoked electrical responses appears at about the time when the ganglion cells spread out into a single layer and shortly after the inner and outer plexiform layers become discernible. Initially giving simple ‘on’ responses, the cells progressively change their response characteristics and become ‘event’ units. Subsequently, ‘dimming’ units can be identified. Throughout larval life, response properties of these two types become more distinct from one another and approximate to those found in the adult. So do the arborization patterns of the dendritic trees of the ganglion cells. Two types of branching patterns are identifiable in Golgi preparations. Around metamorphic climax, a new type of ganglion cell appears, coinciding with the emergence of ‘sustained’ units electrophysiologically. After metamorphosis, the retina still grows both in thickness (mainly in the inner plexiform layer) and diameter. The three unit types change such that they come to show pronounced inhibitory effects from the peripheral visual field on the receptive field and each unit type acquires a distinct pattern of endogenous discharge.

A new type of heteroborospherene as a versatile carrier for drug delivery: A theoretical study

2020 ◽  
Vol 117 ◽  
pp. 113852 ◽  
Author(s):  
Luyi Li ◽  
Xin Jiang ◽  
Hongzhu Wang ◽  
Hao Wu ◽  
Jieqiang Lv ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Theoretical Study ◽  
New Type

Response Characteristics of a Trailer Type Multi-Connected Barge System in Waves

2008 ◽  
Author(s):  
Kunihiro Ikegami ◽  
Makoto Ohta ◽  
Masami Matsuura ◽  
Kazuki Toshimitsu ◽  
Satoshi Nagaosa ◽  
...  
Keyword(s):  
Transportation System ◽  
Response Characteristics ◽  
Relative Pitch ◽  
Non Linear ◽  
New Type ◽  
Ocean Transportation

A trailer type multi-connected barge system is a new type of ocean transportation system composed of several barges connected to each other with a mechanical connecting device and a tug ship. To design the trailer type multi-connected barge system, it is necessary to grasp the exact response characteristics of the trailer type multi-connected barge system in waves. A model basin test was conducted for the trailer type multi-connected barge system in waves. In the model basin test, the tug ship and three barges were connected to each other by the mechanical connecting device, and the tug ship towed three barges in waves. As a result, the response characteristics of the trailer type multi-connected barge system in waves were obtained. A non-linear phenomenon of a longitudinal connecting force caused by relative pitch motions of barges was observed. A way to avoid the non-linear phenomenon and reduce the longitudinal connecting force could be found, and the realization of the trailer type multi-connected barge system was experimentally confirmed.

Wave Response of a Semisubmersible Floating Structure Model With Mechanical Connectors

2008 ◽  
Author(s):  
Yoshiyasu Watanabe ◽  
Koichiro Yoshida
Keyword(s):  
Numerical Analysis ◽  
Response Analysis ◽  
Structure Model ◽  
Analysis Program ◽  
Floating Structure ◽  
Response Characteristics ◽  
Wave Response ◽  
New Type ◽  
Hydroelastic Response ◽  
Two Bodies

It is desired instead of welding to develop a mechanical connector, which may work well to connect two units at the site in spite of circumstances of some extent of relative motions between two units caused by waves. One of the authors proposed a new type of mechanical connector, which is based on an idea of three bodies problem instead of usual mechanical connectors (two bodies problem). In this paper, wave exciting tests of a semisubmersible floating structure model with the proposed mechanical connectors of 1/100 scale and the numerical analysis using hydroelastic response analysis program VODAC are carried out and wave response characteristics of the semisubmersible floating structure model with the mechanical connectors and its feasibility are reported.

scholarly journals Simulation research on dynamic performance of the new type high-pressure solenoid valve

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Qihui YU ◽  
Qiancheng WANG ◽  
Kaifei ZHANG ◽  
Weiwei ZHENG
Keyword(s):  
High Pressure ◽  
Pulse Width Modulation ◽  
Aerodynamic Force ◽  
Dynamic Performance ◽  
Solenoid Valve ◽  
Force Model ◽  
Simulation Research ◽  
Response Characteristics ◽  
Electromagnetic Model ◽  
New Type

To improve energy density, the transportation, storage, and operations of hydrogen, methane, and compressed air vehicles currently require high-pressure compression. High-pressure solenoid valve becomes the vital element to above system. In order to reduce leakage and aerodynamic force influence, a new type high-pressure solenoid valve was proposed. The simulation model which included electromagnetic model, aerodynamic force model was established by means of the nonlinear mathematic models. Using the software MATLAB/Simulink for simulation, the dynamic response characteristics of high-pressure pneumatic solenoid valve were obtained under different pulse width modulation (PWM) input control signals. Results show that, first of all, the new type of high-pressure solenoid valve can meet the switch requirement. Secondly, the opening movement and closing movement of the spool lags the PWM rising signal, and the coil current fluctuates significantly during the movement of the spool. Lastly, on/off status of high-pressure valve cannot be represented by the duty cycle. This research can be referred in the design of the high-pressure solenoid valve..

scholarly journals New Superconductivity and Theoretical Study on a New Phenomenon of Energy Source with Assistance of Initial Experiments

2018 ◽  
Author(s):  
Shinichi Ishiguri
Keyword(s):  
Magnetic Field ◽  
Energy Source ◽  
Electrostatic Field ◽  
Theoretical Study ◽  
Depletion Layer ◽  
Field Energy ◽  
Magnetic Field Energy ◽  
New Type ◽  
The Magnetic Field ◽  
A Current

We previously reported new superconductivity produced by an electrostatic field and a diffusion current in a semiconductor without refrigeration. In particular, the superconductivity was investigated theoretically and confirmed experimentally. Here, we determine that the derived superconducting quantum state can be reproduced in a capacitor. When circuits are formed with this new-type capacitor and diodes, a magnetic field is applied to the diodes’ depletion layer. The depletion layer is biased because of the conversion from the magnetic-field energy to electric-field energy, resulting in the diodes’ spontaneously emitting a current. Thus, the new-type capacitor is charged using no other energy source. This new phenomenon is described theoretically with assistance of initial experiments.

scholarly journals SHIP PASSING THROUGH STRAITS

Transport ◽  
2010 ◽  
Vol 25 (4) ◽  
pp. 345-351 ◽  
Author(s):  
Vytautas Paulauskas
Keyword(s):  
Theoretical Study ◽  
High Accuracy ◽  
Port Development ◽  
Ship Steering ◽  
New Type ◽  
Channel Bottom ◽  
Navigational Systems ◽  
Very High ◽  
Water Bottom

All ports and a number of waterways have straits to optimize investments in developing such systems reaching the maximum results with minimum expenditures. New high accuracy port navigational systems have a possibility of high precision ship positioning and any time should guarantee shipping safety in port waters which makes a good basis for the optimization of port development. A new type of ships with good steering equipment and ship steering knowledge and methods in combination with very high accuracy port navigational systems such as E‐Sea Fix and horizontal/vertical port channel bottom scanning possibilities guaranteeing real port water bottom conditions could stimulate dramatically increasing ship sizes at the port entrance in case of guaranteed shipping safety. With reference to straits, a theoretical study and experimental results received by simulators and real ships under much the same conditions have delivered a new knowledge of the limit of big ship sailing in straits and the possibilities of increasing ship size under similar sailing conditions. The Klaipeda strait is taken as the case study for practical testing. The paper presents the results, conclusions and recommendations of a theoretical and practical study for the ships of an increased size at strait ports.

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