1,554,700 research outputs found
Personality and Cognitive Ability as Predictors of Job Search and Separation Among Employed Managers
Traditional models and research on employee job search and separation focus on situationally-specific variables, those that change with time or between particular employment situations. More enduring individual characteristics, such as personality and cognitive ability, may create predispositions that affect search and separation in consistent ways across different situations. The research reported here extends traditional turnover models by incorporating two enduring individual characteristics – personality and cognitive ability – into the search and separation process. This extended model is then tested on a sample of executives. Cognitive ability as well as the personality dimensions of agreeableness, neuroticism and openness to experience related positively to job search. The effects of cognitive ability and the personality dimensions of agreeableness and openness to experience on job search were partially mediated by the array of situational factors, while the effect of neuroticism on job search was fully mediated. The relationship between extraversion and job search became significant in the presence of situational factors, suggesting a suppressor effect. With regard to separation, a similar suppressor effect was found for extraversion. Implications for future research and practice are discussed
Karakterrisasi membran selulosa Asetat untuk pemisahan gas.
Proses peraisahan gas banyak dijumpai dalam proses pembuatan zat kimia seperti: pemurnian gas CO2 dari unsur-ungur pembentuknya, penyediaan N2 dan 02 dari udara. sering dipakai sistem destilasi. Dikarenakan biaya pada proses destilasi mahal, mica dicoba digunakan membran sebagai alternatif 1Cinerja membran yang dignnakan untuk pemisahan gas tergantung dad jenis membran, komposisi dan proses pembuatannya
Penelitian ini bertujuan untuk mengetahui pengaruh komposisi dan perlakuan pada proses pembuatan membran selulosa asetat terhadap koefisien permeabilitas dan koefisien selektifitas pada pemisahan campuran gas CO2, N2 dan 02.
Penelitian dilakukan dengan mengukur besarnya finks gas CO2, 02 dan N2 pada tekanan 0,1; 0,5; 1; 1,5; 2; 2,5 dan 3 atm. Dari harga fluks dapat ditentukan koefisien permeabilitas yang digunakan untuk menentukan koefisien selektifitas yang menunjukkan kemarnpuan pemisahan campuran gas. Dari penehtian jai didapatkan seleklifitas ideal campuran CO2 dengan 02 dengan kemanipuan pemisahan terendah yaitu 1,0198 pada membran dengan komposisi selulosa asetat aseton : air yaitu 11% : 79% : 10%, pada tekanan 1,5 atm, sedangkan tertinggi yaitu 0,000 pada komposisi 10% : 80% : 10%, pada tekanan 1 attn. Selektivitas ideal campuran CO2 dengan N2 dengan kemampuart pemisahan terendah yaitu 0,955 pada membran dengan komposisi selulosa asetat : aseton : air yaitu 11% : 76% : 13%, pada tekanan 3 atm, sedangksn tertinggi yaitu 0,000 pada komposisi 10% : 80% : 10%, pada tekanan 1 atm. Selektivitas ideal campuran 02 dengan N2 dengan ketnampuan pemisahan terendah yaitu 1,00 pada membran dengan komposisi selulosa asetat aseton : air yaitu 9% : 89% : 100/o, pada tekanan 0,5 atm, sedangkan tertinggi yaitu 0,00 pada komposisi 11% : 78%: 11%, pada tekanan 1 atm.
Hasil dari penelitian yang telah dilakukan menunjukkan bahwa membran selulosa asetat dapat dipergunakan untuk pemisahan gas. Kernampuan dan finigsi dari membran tergantung clan- komposisi bahan selulosa asetat, aseton dan air serta perlakuan dalam pembuatan membran selulosa asetat tersebut. Pemisahan campuran dua gas dapat diketahui Bari perbandingan koefisien permeabilitas maxi ng-masing gas. Pengaturan tekanan dapat mengoptimalkan basil pemisahan_
Separation process of gas is found in a lot of synthesis of chemical substance, like in purification of CO2 from reactans, separation N2 and 02 from air usually is carried out by distillation system, but its an expensive process. Therefore as an alternative process it is used membranes. Membrane performance tbat is used for gas separation depends on membrane type, composition and the process of membranes production.
The objective of this research is to find out the influence of cellulose acetate membrane composition to its performance in separation behaviour of mixture of CO2 with 02, CO2 with N2 and 02 with N2
Each of CO2, 02 and N2 flux was measured at 0,1; 0,5; 1; 1,5; 2; 2,5 and 3 atm respectively. The permeability coefficient was calculated from the flux, which then could be used to determine selectivity coefficient which show the ability of membranes to separate gas mixture. It was found that the ideal selectivity was 1.0198 for mixture of CO2 with 02 for membrane with composition of cellulose acetate : acetone : water 11% : 79% : 100/0 at 1.5 atm. It was the lowest separation ability. While the highest separation ability was 0.000 for membrane with composition of cellulose acetate : acetone : water 10% : 80% : 10% at 1 atm. The ideal selectivity is 0.955 for mixture of CO2 with N2 for membrane with composition of cellulose acetate : acetone : water 11% 76% : 13% at 3 atm. It was the lowest separation ability. While the highest separation ability was 0.000 for membrane with composition of cellulose acetate : acetone : water 10% 80%: 10% at 1 atm. The ideal selectivity was 1.00 for mixture of 02 with N2 for membrane with composition of cellulose acetate : acetone : water 9% : 89% : 10% at 0.5 atm. It was the lowest separation ability. While the highest separation ability was 0.000 was gave by membrane with composition of cellulose acetate : acetone : water 10% : 80% : 10% at 1 atm..
The result of this research show that cellulose acetate membrane could use for gas separation. Capability and function of membrane depend on membrane composition, cellulose acetate, acetone and water, beside these, treatment in membrane synthesing could affect the membrane performance Separation the mixture of two gases could see from comparation of permeability coefficient both of them. Pressure regulation can optimizing the separation resul
Phase separation and large deviations of lattice active matter
Off-lattice active Brownian particles form clusters and undergo phase
separation even in the absence of attractions or velocity-alignment mechanisms.
Arguments that explain this phenomenon appeal only to the ability of particles
to move persistently in a direction that fluctuates, but existing lattice
models of hard particles that account for this behavior do not exhibit phase
separation. Here we present a lattice model of active matter that exhibits
motility-induced phase separation in the absence of velocity alignment. Using
direct and rare-event sampling of dynamical trajectories we show that
clustering and phase separation are accompanied by pronounced fluctuations of
static and dynamic order parameters. This model provides a complement to
off-lattice models for the study of motility-induced phase separation.Comment: Submitted along with arXiv:1709.03951 as a joint work to PRE and PR
The momentum for network separation: a guide for regulators
NGAs (Next Generation Access Networks) are a challenge to regulators and operators insofar as they require large investments, there is significant uncertainty about the ability to recover costs, and the choice of the appropriate regulatory regime is far from consensual. Regulatory authorities might want to seize the moment and reconsider the mandatory vertical separation of telecommunication firms, without jeopardizing incentives to innovation, investment and welfare. We provide a provocative but simple test for the adequacy of network separation as a regulatory remedy. We propose a decision tree procedure with four steps in order to assess whether network separation is an adequate regulatory response: [1] “Is there significant market power in the market for the provision of access services under NGAs?”; [2] “Are there few vertical complementarities between services along the supply chain?”; [3] “Is functional separation a better regulatory tool than any other alternative?”; and [4] “Is structural separation superior to functional separation?”. A positive answer to the first three questions implies that the regulator should consider functional network separation, whilst the fourth is needed for the structural alternative.Telecommunications networks, Functional separation, Structural separation
Exogenous vs. endogenous separation
This paper assesses how various approaches to modeling the separation margin affect the ability of the Mortensen-Pissarides job matching model to explain key facts about the aggregate labor market. Allowing for realistic time variation in the separation rate, whether exogenous or endogenous, greatly increases the unemployment variability generated by the model. Specifications with exogenous separation rates, whether constant or time-varying, fail to produce realistic volatility and productivity responsiveness of the separation rate and worker flows. Specifications with endogenous separation rates, on the other hand, succeed along these dimensions. In addition, the endogenous separation model with on-the-job search yields a realistic Beveridge curve correlation and performs well in accounting for the productivity responsiveness of market tightness. While adopting the Hagedorn-Manovskii calibration approach improves the behavior of the job finding rate, the volume of job-to-job transitions in the on-the-job search specification becomes essentially zero.Job hunting ; Unemployment
Quantum vs Classical Proofs and Subset Verification
We study the ability of efficient quantum verifiers to decide properties of
exponentially large subsets given either a classical or quantum witness. We
develop a general framework that can be used to prove that QCMA machines, with
only classical witnesses, cannot verify certain properties of subsets given
implicitly via an oracle. We use this framework to prove an oracle separation
between QCMA and QMA using an "in-place" permutation oracle, making the first
progress on this question since Aaronson and Kuperberg in 2007. We also use the
framework to prove a particularly simple standard oracle separation between
QCMA and AM.Comment: 23 pages, presentation and notation clarified, small errors fixe
Heat-sterilizable, remotely activated battery development program, phase 1 Quarterly report, 1 Jul. - 30 Sep. 1968
Testing of absorbent plate separation materials and propellant formulations to characterize battery components ability to withstand dry heat sterilizatio
A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice.
A major advantage of microfluidic devices is the ability to manipulate small sample volumes, thus reducing reagent waste and preserving precious sample. However, to achieve robust sample manipulation it is necessary to address device integration with the macroscale environment. To realize repeatable, sensitive particle separation with microfluidic devices, this protocol presents a complete automated and integrated microfluidic platform that enables precise processing of 0.15-1.5 ml samples using microfluidic devices. Important aspects of this system include modular device layout and robust fixtures resulting in reliable and flexible world to chip connections, and fully-automated fluid handling which accomplishes closed-loop sample collection, system cleaning and priming steps to ensure repeatable operation. Different microfluidic devices can be used interchangeably with this architecture. Here we incorporate an acoustofluidic device, detail its characterization, performance optimization, and demonstrate its use for size-separation of biological samples. By using real-time feedback during separation experiments, sample collection is optimized to conserve and concentrate sample. Although requiring the integration of multiple pieces of equipment, advantages of this architecture include the ability to process unknown samples with no additional system optimization, ease of device replacement, and precise, robust sample processing
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