Tracer Study : Melacak Jejak Lulusan FKM UI (Hasil Study Kualitatif Tracer Sarjana Kesehatan Masyarakat FKM UI 2006)

One important indicator of the success of higher education is the contribution of its alumni in the community and development. Tracer study provides infor- mation on alumni contribution and involvement in the community including working and employment dynamics. Faculty of Public Health University of Indonesia (FPHUI) has conducted a quantitative tracer study in 2003 which informed selected aspects related to alumni and their existence in employment world. This study is a qualitative tracer study to complement the first tracer study and aimed at digging further information on learning experience in FPHUI, working experience, and alumni and user\u27s satisfaction on education in FPHUI. In-depth interviewed were conducted to 24 informants which divided into 4 groups of institution (government, private sector/industry, non government organization and higher education institutions). Subjects were traced in a multimode way and data was analyzed based on the study main theme. Study exhibits that field-based learning is perceived as the most important learning experience and soft-skill is highly appreciated and most relevant in the real work situation. The study also found that most users and alumni are satisfied with education in FPHUI

Perancangan UI/UX E-Tracer Study UNIROW dengan Menggunakan Metode Doubel Diamond

Currently, at PGRI Ronggolawe Tuban University, tracer studies are still using google forms which aim to collect alumni data. It is still not effective and has many shortcomings in order to solve the problem, a UI/UX e-tracer study design was made using the double diamond method. The double diamond method is used by researchers to conduct usability evaluation tests on old tracer studies using the System Usability Scale (SUS) and the User Experience Questionnaire (UEQ). The SUS results obtained from Google's old tracer study form are 49 (grade F) while the E-Tracer Study results are 82.6 (grade B) and the results from the UEQ show an attractiveness scale from 0.41 to 2.04, pepisicuity scale 0.21 to 2.28, efficiency scale 0.23 to 2.18, dependability scale 0.51 to 1.80, stimulation scale 0.54 to 2.13, and novelty scale -0.09 to 1.88. This proves that UI/UX design in E-Tracer Study resulted in an increase in usabilit

Tracer particle diffusion in a system with hardcore interacting particles

In this study, inspired by the work of K. Nakazato and K. Kitahara [Prog. Theor. Phys. 64, 2261 (1980)], we consider the theoretical problem of tracer particle diffusion in an environment of diffusing hardcore interacting crowder particles. The tracer particle has a different diffusion constant from the crowder particles. Based on a transformation of the generating function, we provide an exact formal expansion for the tracer particle probability density, valid for any lattice in the thermodynamic limit. By applying this formal solution to dynamics on regular Bravais lattices we provide a closed form approximation for the tracer particle diffusion constant which extends the Nakazato and Kitahara results to include also b.c.c. and f.c.c. lattices. Finally, we compare our analytical results to simulations in two and three dimensions.Comment: 28 pages with appendix, 5 figure. To appear in JSTA

Inertial particle acceleration in strained turbulence

The dynamics of inertial particles in turbulence is modelled and investigated by means of direct numerical simulation of an axisymmetrically expanding homogeneous turbulent strained flow. This flow can mimic the dynamics of particles close to stagnation points. The influence of mean straining flow is explored by varying the dimensionless strain rate parameter $Sk_0/\epsilon_0$ from 0.2 to 20. We report results relative to the acceleration variances and probability density functions for both passive and inertial particles. A high mean strain is found to have a significant effect on the acceleration variance both directly, through an increase in wave number magnitude, and indirectly, through the coupling of the fluctuating velocity and the mean flow field. The influence of the strain on normalized particle acceleration pdfs is more subtle. For the case of passive particle we can approximate the acceleration variance with the aid of rapid distortion theory and obtain good agreement with simulation data. For the case of inertial particles we can write a formal expressions for the accelerations. The magnitude changes in the inertial particle acceleration variance and the effect on the probability density function are then discussed in a wider context for comparable flows, where the effects of the mean flow geometry and of the anisotropy at the small scales are present

Some relations between Lagrangian models and synthetic random velocity fields

We propose an alternative interpretation of Markovian transport models based on the well-mixedness condition, in terms of the properties of a random velocity field with second order structure functions scaling linearly in the space time increments. This interpretation allows direct association of the drift and noise terms entering the model, with the geometry of the turbulent fluctuations. In particular, the well known non-uniqueness problem in the well-mixedness approach is solved in terms of the antisymmetric part of the velocity correlations; its relation with the presence of non-zero mean helicity and other geometrical properties of the flow is elucidated. The well-mixedness condition appears to be a special case of the relation between conditional velocity increments of the random field and the one-point Eulerian velocity distribution, allowing generalization of the approach to the transport of non-tracer quantities. Application to solid particle transport leads to a model satisfying, in the homogeneous isotropic turbulence case, all the conditions on the behaviour of the correlation times for the fluid velocity sampled by the particles. In particular, correlation times in the gravity and in the inertia dominated case, respectively, longer and shorter than in the passive tracer case; in the gravity dominated case, correlation times longer for velocity components along gravity, than for the perpendicular ones. The model produces, in channel flow geometry, particle deposition rates in agreement with experiments.Comment: 54 pages, 8 eps figures included; contains additional material on SO(3) and on turbulent channel flows. Few typos correcte

A note on the consistency of Hybrid Eulerian/Lagrangian approach to multiphase flows

The aim of the present paper is to introduce and to discuss inconsistencies errors that may arise when Eulerian and Lagrangian models are coupled for the simulations of turbulent poly-dispersed two-phase flows. In these hydrid models, two turbulence models are in fact implicitely used at the same time and it is essential to check that they are consistent, in spite of their apparent different formulations. This issue appears in particular in the case of very-small particles, or tracer-limit particles, and it is shown that coupling inconsistent turbulence models (Eulerian and Lagrangian) can result in non-physical results, notably for second-order fluid velocity moments. This problem is illustrated by some computations for fluid particles in a turbulent channel flow using several coupling strategies.Comment: 14 pages, 3 figure