Differences in the parasitic effects of a bopyrid isopod and rhizocephalan barnacle on the portunid crab, Charybdis bimaculata

2021 ◽  
Vol 81 ◽  
pp. 102283
Author(s):  
Jonel M. Corral ◽  
Yumi Henmi ◽  
Gyo Itani
Keyword(s):  
Portunid Crab ◽  
Parasitic Effects

ОСОБЕННОСТИ ПРОЕКТИРОВАНИЯ СВЧ-КЛЮЧЕЙ В РАЗНЫХ КОНСТРУКТИВНО-ТЕХНОЛОГИЧЕСКИХ БАЗИСАХ

2020 ◽  
Vol 96 (3s) ◽  
pp. 627-630
Author(s):  
А.Д. Калёнов ◽  
И.И. Мухин ◽  
В.В. Репин
Keyword(s):  
High Frequencies ◽  
Basic Parameters ◽  
Parasitic Effects ◽  
Soi Cmos

Представляется сравнение СВЧ-ключей, проектируемых в разных конструктивно-технологических базисах: КНИ, КМОП, биполярные и GaAs. Определенные трудности существуют при разработке ключей на сверхвысоких частотах, в разных технологиях необходимо учитывать различные эффекты. Наличие паразитных эффектов сильно осложняет разработку. В статье приводится оценка влияния паразитных эффектов на основные параметры СВЧ-ключей в разных конструктивно-технологических базисах. The paper offers a comparison of microwave keys designed in different structural and technological bases: SOI, CMOS, bipolar and GaAs. There are some difficulties in developing the keys to the ultra-high frequencies, in different technologies it is necessary to consider various effects. The presence of parasitic effects greatly complicates the development. The article provides an assessment of the influence of parasitic effects on the basic parameters of microwave keys in different structural and technological bases.

scholarly journals The Effectiveness of Candidate Probiotic Bacteria to Control Vibriosis Disease

2017 ◽  
Vol 5 (2) ◽  
pp. 1
Author(s):  
Mulyati Mulyati ◽  
Suryati Suryati ◽  
Irfani Baga
Keyword(s):  
Survival Rate ◽  
Sea Water ◽  
Challenge Test ◽  
Probiotic Bacteria ◽  
Pathogenicity Test ◽  
Inhibitory Ability ◽  
Significant Difference ◽  
Portunid Crab

The study aims to isolate, characterize, and examine probiotic bacteria's inhibitory ability against Vibrio harveyi bacteria, both in-vitro and in vivo. Methods used in the study consist of 1) An Isolation of Candidate Probiotic Bacteria, 2) An Antagonistic Test of Candidate Probiotic Bacteria in vitro, 3) An Identification of Bacteria, 4) A Pathogenicity Test of Candidate Probiotic Bacteria, 5) An Antagonistic Test of Candidate Probiotic Bacteria against V. harveyi in vivo. According to the isolation of candidate probiotic bacteria, there are 18 isolated candidate probiotic. After being tested for its inhibitory ability in vitro, there are 8 isolates with zone of inhibition as follows: isolate MM 7 from intestine (22 mm), isolate MM 6 from intestine (12 mm), isolate MM 10 from sea water (10 mm), isolate MM 5 from intestine (9 mm), isolate MM 4 from intestine (8 mm), isolate MM 3 from intestine (7 mm), isolate MM 2.2 from intestine (7 mm), isolate MM 2.1 from intestine (7 mm). Eight genera of the candidate probiotic bacteria is derived from Portunid crab, they are Staphylococcus, Streptococcus, bacillus, vibrio, Alcaligenes, Lactobacillus, micrococcus. Before proceeding the V. harveyi bacterial challenge test in vivo, three potential isolates consisting of MM6, MM7 and MM10 as the probiotic bacteria are pathogenicity-tested against V. harveyi. The survival rate of Portunid crab on pathogenicity test using MM6, MM7 and MM10 generates 91.11-100%, while the control generates 100% survival rate. Variance analysis result through post-hoc Tukey's Honest Significant Difference (HSD) test at 95% confidence interval indicates that isolate MM7 and MM10 are significantly able to increase hatchling Portunid crab's survival rate.

scholarly journals Memristors as Candidates for Replacing Digital Potentiometers in Electric Circuits

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 181
Author(s):  
Ivo Marković ◽  
Milka Potrebić ◽  
Dejan Tošić
Keyword(s):  
Phase Shifter ◽  
Voltage Divider ◽  
Frequency Characteristics ◽  
Phase Shifters ◽  
Pass Filter ◽  
Electric Circuits ◽  
Digital Potentiometer ◽  
Memristive Circuits ◽  
Parasitic Effects ◽  
Additional Level

Digital potentiometers are substantial components for the design of many mixed-signal electronic circuits and systems. Their capability to program resistance value almost instantly provides hardware designers an additional level of freedom. Unfortunately, this feature is limited to DC and lower frequencies, due to parasitic effects. Nowadays, memristors as continuously tunable resistors are becoming candidates for potentiometer successors. Memristors are two-terminal non-volatile devices which have less significant parasitic effects and a wide resistance range. The memristance value can be changed on the fly. Using nanotechnology, memristor implementation has a nanoscale footprint with nanosecond transition between resistive states. In this paper, we present a comparison between the frequency characteristics of digital potentiometers and the only commercially available memristors. Memristor parasitic effects dominate at higher frequencies which extends the bandwidth. In order to present the advantages of memristive circuits, we have analyzed and implemented tunable circuits such as a voltage divider, an inverting amplifier, a high-pass filter, and a phase shifter. A commercially available memristor by KnowM Inc. is used for this purpose. Experimental results obtained by the measurements verify that a memristor has equal or better characteristics than a digital potentiometer. Memristive realizations of voltage dividers and inverting amplifiers have a wider bandwidth, while filters and phase shifters with a memristor have almost identical frequency characteristics as the corresponding realizations with a digital potentiometer.

Movement within and between different habitats by the portunid crab Scylla serrata

1984 ◽  
Vol 80 (1) ◽  
pp. 57-61 ◽  
Author(s):  
S. J. Hyland ◽  
B. J. Hill ◽  
C. P. Lee
Keyword(s):  
Scylla Serrata ◽  
Portunid Crab

Cycloachelous levigatus sp. nov., a new swimming crab (Crustacea: Decapoda: Portunidae) from the South China Sea

Zootaxa ◽  
2021 ◽  
Vol 4970 (2) ◽  
pp. 325-339
Author(s):  
MILAN KOCH
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Molecular Data ◽  
Western Pacific ◽  
Swimming Crab ◽  
Single Male ◽  
Portunid Crab ◽  
A New Species ◽  
Pacific Area

A new species of portunid crab from the genus Cycloachelous Ward, 1942 is described from Vietnamese waters. Cycloachelous levigatus sp. nov. is morphologically most similar to C. orbitosinus (Rathbun, 1911), which was originally described from the syntype series collected from Western Pacific area (Cargados Carajos Islands, Amirante Islands, Seychelles) and C. octodentatus (Gordon, 1938) described from one single male from Singapore. There are differences in the sternal segments, third maxilliped, chela, abdomen and male gonopode shapes. The specific status of C. levigatus sp. nov. is also clearly supported by molecular data. Aside from a comparison of this new species with other known congeners, new photographs of syntypes of C. orbitosinus and the holotype of C. octodentatus are also provided. 

Main Parasitic Effects in Contactless Wafer Testing

2019 ◽  
pp. 69-76
Author(s):  
Alessandro Finocchiaro ◽  
Giovanni Girlando ◽  
Alessandro Motta ◽  
Alberto Pagani ◽  
Giuseppe Palmisano
Keyword(s):  
Parasitic Effects

scholarly journals Experimental investigation of the Multipoint Ultrasonic Flowmeter

2018 ◽  
Vol 180 ◽  
pp. 02026
Author(s):  
Filipský Jakub
Keyword(s):  
Experimental Investigation ◽  
Vector Field ◽  
Velocity Field ◽  
Computer Simulations ◽  
Correlation Method ◽  
Ultrasonic Flowmeter ◽  
Ultrasonic Measurements ◽  
Parasitic Effects ◽  
Achievable Accuracy ◽  
Three Components

The Multipoint Ultrasonic Flowmeter is a vector tomographic device capable of reconstructing all three components of velocity field based solely on boundary ultrasonic measurements. Computer simulations have shown the feasibility of such a device and have been published previously. This paper describes an experimental investigation of achievable accuracy of such a method. Doubled acoustic tripoles used to obtain information of the solenoidal part of vector field show extremely short differences between the Time Of Flights (TOFs) of individual sensors and are therefore sensitive to parasitic effects of TOF measurements. Sampling at 40MHz and correlation method is used to measure the TOF.

Analysis of latchup and parasitic effects in merged BiCMOS structures

1993 ◽  
Vol 28 (12) ◽  
pp. 1389-1394 ◽  
Author(s):  
S.S. Rofail ◽  
M.I. Elmasry
Keyword(s):  
Parasitic Effects
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