scholarly journals Human Adaptation Towards a Force Augmenting Device: Experimental Results

2017 ◽  
Vol 4 (2) ◽  
pp. 205-212
Author(s):  
S. K. Gadi ◽  
A. Osorio -Cordero ◽  
Rogelio Lozano ◽  
R. Garrido
Keyword(s):  
Short Communication ◽  
Mental Workload ◽  
Experimental Results ◽  
Human Operator ◽  
Human Adaptation ◽  
Different Ages ◽  
First Time

This short communication article presents an experiment to test the existence of mental workload (MWL) and adaptability of a human operator (HO) in handling force augmenting devices (FADs). An experiment is conducted where the HOs of three different ages are allowed to handle a FAD with high augmentation factor. Augmentation factor gives the factor by which the HO’s force is amplified. It is observed that the HOs were unable to stabilize the FAD for the first time. With the help of these experiments, it is observed that a human adapts itself to achieve a stable HA-FAD interaction. In another perspective, it can be observed that HO undergoes MWL to handle a FAD with high augmentation factor.

scholarly journals CHANGES IN THE DNA SYNTHESIS PATTERN OF PARAMECIUM WITH INCREASED CLONAL AGE AND INTERFISSION TIME

1974 ◽  
Vol 61 (3) ◽  
pp. 591-598 ◽  
Author(s):  
Joan Smith-Sonneborn ◽  
Michael Klass
Keyword(s):  
Cell Cycle ◽  
Dna Synthesis ◽  
Unicellular Organism ◽  
Time Intervals ◽  
Synchronized Cells ◽  
Different Ages ◽  
Self Fertilization ◽  
Autoradiographic Analysis ◽  
S Period ◽  
First Time

The clonal age in paramecia refers to the total number of vegetative divisions a clone has undergone since its origin at autogamy (self-fertilization). As clonal age increases, the interfission time usually increases. The DNA synthesis pattern of cells of different ages was compared by autoradiographic analysis of the DNA synthesis of synchronized cells at various time intervals during the cell cycle (from one division to the next). The study showed that the G1 period (the lag in DNA synthesis post division) was constant, irrespective of interfission time or clonal age; but the duration of the DNA synthesis period increased with increased interfission time or clonal age. Therefore, we have shown for the first time that the G1 period is fixed, and the S period is increased in a eukaryotic unicellular organism as a function of interfission time and clonal age.

scholarly journals APPLYING OF ACTIVITIES MANAGEMENT BASED ON SELF-LEARNING

2018 ◽  
Vol 1 ◽  
pp. 29-38 ◽  
Author(s):  
Valerii Samsonkin ◽  
Valerii Druz’ ◽  
Albert Feldman
Keyword(s):  
Quality Management ◽  
Technological Process ◽  
Human Activities ◽  
System Approach ◽  
Human Operator ◽  
Statistical Regularity ◽  
Effective Management ◽  
The Individual ◽  
First Time ◽  
Self Learning

The article is devoted to a brief presentation and application in practice of an effective management way of human activities and human-technical communities one. This way was called Method of statistical regularity (Method of self-organizing processes). In fact, this is a system approach. For the first time, the application of this approach is shown on the example of quality management of the technological process. Practical management is shown using an algorithm. The effectiveness of the author's system approach is explained by the consideration of the final result of the activity as a goal and a system-forming factor of activity, taking into account the individual features of the management object, real statistics of activity. The system approach described in the article is a universal devise of management. It can be used and already used to manage individual functions of the enterprise, the process, the human operator, the community

scholarly journals Omnivorous Behaviour of the Agouti (Dasyprocta leporina): A Neotropical Rodent with the Potential for Domestication

Scientifica ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Kegan Romelle Jones ◽  
Kavita Ranjeeta Lall ◽  
Gary Wayne Garcia
Keyword(s):  
Rural Communities ◽  
Trinidad And Tobago ◽  
Short Communication ◽  
Nutrient Requirements ◽  
The West ◽  
Field Station ◽  
Zenaida Macroura ◽  
Neotropical Rodent ◽  
The University ◽  
First Time

The agouti is a Neotropical rodent which is mainly utilized for its meat in rural communities. Recently, captive rearing of these animals by wildlife farmers have increased in the Neotropics. This short communication consists of observation of feeding behaviour of captive reared agoutis at the University of the West Indies Field Station in Trinidad and Tobago. This is the first time in Trinidad and Tobago that meat consumption and the omnivorous behaviour of the agouti have been documented in the literature. The consumption of chicken (Gallus domesticus) eggs, dead chickens, and a brown dove (Zenaida macroura) by captive reared agoutis was noted. This document described the omnivorous behaviour of the agouti which is primarily considered a frugivorous animal. Similar studies in South America have shown that wild and captive reared agoutis consumed animal matter. Further work must be done on the dietary needs and nutrient requirements of the agouti at different physiological states.

Partial and full inelasticity coefficients in 16Op-collisions at 3.25AGeV/c

2017 ◽  
Vol 26 (10) ◽  
pp. 1750066
Author(s):  
Kosim Olimov ◽  
K. G. Gulamov ◽  
Khusniddin K. Olimov ◽  
Sagdulla L. Lutpullaev ◽  
Vladimir V. Lugovoy ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Experimental Results ◽  
Glauber Model ◽  
Incident Proton ◽  
Neutral Pions ◽  
High Energies ◽  
First Time

The partial inelasticity coefficients of baryon fragments of oxygen nuclei and pions were investigated and the full inelasticity coefficient was determined for the first time in [Formula: see text] collisions at [Formula: see text]. The fraction of kinetic energy of incident proton in [Formula: see text] collisions at [Formula: see text] spent on formation of all the baryon fragments and production of charged and neutral pions was found. The experimental results were compared with those obtained in other experiments at high energies. The experimental full inelasticity coefficient in [Formula: see text] collisions at [Formula: see text] was reproduced well by calculations within the framework of Glauber model of multiple scatterings in hadron–nucleus collisions.

Time sensitive blog retrieval using temporal properties of queries

2016 ◽  
Vol 43 (1) ◽  
pp. 103-121 ◽  
Author(s):  
MohammadSadegh Zahedi ◽  
Abolfazl Aleahmad ◽  
Maseud Rahgozar ◽  
Farhad Oroumchian ◽  
Arastoo Bozorgi
Keyword(s):  
Experimental Analysis ◽  
Experimental Results ◽  
Temporal Property ◽  
Time Intervals ◽  
Efficient Approach ◽  
Temporal Properties ◽  
Time Sensitivity ◽  
Retrieval Algorithms ◽  
First Time ◽  
The Web

Blogs are one of the main user-generated contents on the web and are growing in number rapidly. The characteristics of blogs require the development of specialized search methods which are tuned for the blogosphere. In this paper, we focus on blog retrieval, which aims at ranking blogs with respect to their recurrent relevance to a user’s topic. Although different blog retrieval algorithms have already been proposed, few of them have considered temporal properties of the input queries. Therefore, we propose an efficient approach to improving relevant blog retrieval using temporal property of queries. First, time sensitivity of each query is automatically computed for different time intervals based on an initially retrieved set of relevant posts. Then a temporal score is calculated for each blog and finally all blogs are ranked based on their temporal and content relevancy with regard to the input query. Experimental analysis and comparison of the proposed method are carried out using a standard dataset with 45 diverse queries. Our experimental results demonstrate that, using different measurement criteria, our proposed method outperforms other blog retrieval methods.

Effect of Audio-Visual Alerts on Situation Awareness and Workload in a Net-Centric Warfare Scenario

2007 ◽  
Vol 51 (18) ◽  
pp. 1205-1209
Author(s):  
Jennifer M. Ross ◽  
John S. Barnett ◽  
Larry L. Meliza
Keyword(s):  
Situation Awareness ◽  
Mental Workload ◽  
Human Operator ◽  
Moderating Effects ◽  
Critical Events ◽  
Perceived Workload ◽  
The Common ◽  
Information Advantage ◽  
Inherent Nature

The goal of net-centric warfare (NCW) is to give soldiers an information advantage that leads to a war-fighting advantage. However, the inherent nature of NCW systems is often quite complex and dynamic, which leads to impaired situation awareness (SA) and heightened levels of mental workload for the human operator. The following study investigated the moderating effects of automated audio-visual alerts on user SA and perceived workload while using a net-centric warfare system. Twenty-six participants observed battlefield scenarios on a simulation of the common NCW system, Force XXI Battle Command Brigade and Below (FBCB2), and were required to pay attention and remember critical events (e.g., the appearance of an enemy unit). The system was presented with or without an automated alerting aid that provided combined auditory and visual alerts when certain critical events occurred (i.e., System to Help Implement and Empower Leader Decisions; SHIELD). Results revealed that contrary to current assumptions the use of an automated alerting aid did not impact user SA; however, perceived workload was significantly lower with the addition of the alerting aid. This work demonstrates that the automated alerts used in this NCW experiment do not affect SA (either positively or negatively) and decreased perceived workload.

Nonlinear Taylor–Couette flow of helium II

1995 ◽  
Vol 283 ◽  
pp. 329-340 ◽  
Author(s):  
Karen L. Henderson ◽  
Carlo F. Barenghi ◽  
Chris A. Jones
Keyword(s):  
Couette Flow ◽  
Equations Of Motion ◽  
Experimental Results ◽  
Second Sound ◽  
Helium Ii ◽  
Vortex Lines ◽  
Taylor Couette ◽  
First Time ◽  
Two Fluid ◽  
Taylor Couette Flow

We solve the nonlinear two-fluid Hall–Vinen–Bekharevich–Khalatnikov equations of motion of helium II for the first time and investigate the configuration of quantized vortex lines in Taylor–Couette flow. The results are interpreted in terms of quantities which can be observed by measuring the attenuation of second sound. Comparison is made with existing experimental results.

A Validated Rating Scale for Global Mental Workload Measurement Applications

1983 ◽  
Vol 27 (2) ◽  
pp. 129-133 ◽  
Author(s):  
Walter W. Wierwille ◽  
John G. Casali
Keyword(s):  
Decision Tree ◽  
Rating Scale ◽  
Mental Workload ◽  
Human Operator ◽  
Point Scale ◽  
Motor Tasks ◽  
Handling Qualities ◽  
Workload Measurement

The Cooper-Harper (1969) scale has been extensively used for evaluation of aircraft handling qualities and associated mental workload. The scale is a 10-point scale with a decision tree. A modified version of the scale, called the MCH scale, has been devised for the purpose of assessing workload in systems other than those where the human operator performs motor tasks; namely, where perceptual, mediational, and communications activity is present. The MCH scale has been validated in three different experiments. The scale is recommended for applications in which overall mental workload is to be assessed.

Ultrasonic Vibration-Assisted Pelleting of Cellulosic Biomass for Biofuel Manufacturing: A Study on Pellet Cracks

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Yongjun Tang ◽  
Pengfei Zhang ◽  
Defu Liu ◽  
Z. J. Pei ◽  
Weilong Cong
Keyword(s):  
Ultrasonic Vibration ◽  
Crack Formation ◽  
Crack Size ◽  
Experimental Results ◽  
Cellulosic Biomass ◽  
Pellet Quality ◽  
Experimental Conditions ◽  
Transportation Fuels ◽  
Cellulosic Biofuel ◽  
First Time

Biofuels produced from cellulosic biomass are an alternative to petroleum-based liquid transportation fuels. The costs of cellulosic biofuel manufacturing are high partly due to the low density of raw cellulosic materials. Processing cellulosic biomass into pellets can increase density and handling efficiency of cellulosic feedstocks, resulting in reduction of transportation and handling costs. The literature on ultrasonic vibration-assisted (UV-A) pelleting includes studies about effects of pelleting parameters on pellet quality, pelleting temperature, charring, and sugar yield. However, there are no studies on pellet cracks. This paper, for the first time, presents a study on pellet cracks in UV-A pelleting of wheat straw. It first describes experimental conditions and then presents experimental results about effects of pelleting parameters on crack size. Afterward, it proposes a hypothesis on crack formation in UV-A pelleting and discusses some evidences that support this hypothesis. Finally, it provides explanations to experimental results based on the hypothesis.

scholarly journals Short Communication: New insights into the morphology and distribution of the Philippine endemic Etlingera pilosa (Zingiberaceae)

2021 ◽  
Vol 22 (8) ◽  
Author(s):  
Mark Arcebal Naive ◽  
Cesar Demayo ◽  
Grecebio Jonathan Alejandro
Keyword(s):  
Short Communication ◽  
Distribution Map ◽  
Conservation Assessment ◽  
Taxonomic Key ◽  
Iucn Conservation Assessment ◽  
Distributional Range ◽  
First Time

Abstract. Naive MAK, Demayo CG, Alejandro GJD. 2021. Short Communication: New insights into the morphology and distribution of the Philippine endemic Etlingera pilosa (Zingiberaceae). Biodiversitas 22: 3175-3179. Etlingera pilosa Poulsen & Docot, only known in Negros Oriental and Negros Occidental of Visayas islands, Philippines, is recorded in the island of Mindanao for the first time, thus, extending its distributional range. The species is characterized by having sericeous ligule; leaves subsessile, narrowly obovate, coriaceous, glabrous adaxially, densely pubescent abaxially; inflorescence up to 12 cm long; flowers yellow, 3.0–3.2 cm long; subglobose to obovoid, pilose, with wart like blunt spines fruit; and seeds irregularly subglobose to oblate, black, fully embedded in juicy sour-sweet white aril. This species closely resembles E. pubimarginata but differs in having densely pubescent abaxial leaf, sericeous ligule and subglobose to obovoid, pilose, with wart like blunt spines fruit. Here, we provide a detailed description, comparison with its allied species, colored photographs to aid identification, a distribution map, an IUCN conservation assessment and a taxonomic key to the Mindanao Etlingera species.

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