scholarly journals Review of the shadow-test approach to adaptive testing

2021 ◽  
Author(s):  
Wim J. van der Linden
Keyword(s):  
Real Time ◽  
Time Management ◽  
Adaptive Testing ◽  
Basic Operation ◽  
Item Calibration ◽  
Security Monitoring ◽  
Calibration Time ◽  
Sequential Assembly

AbstractConstrained adaptive testing is reviewed as an instance of discrete maximization with the shadow-test approach delivering its solution. The approach may look counterintuitive in that it assumes sequential assembly of full test forms as its basic operation. But it always produces real-time solutions that are optimal and satisfy the set of specifications in effect for the test. Equally importantly, it can be used to run testing programs with different degrees of adaptation for the same set of specifications and/or as a tool to manage programs with simultaneous processes as adaptive item calibration, time management, and/or item-security monitoring.

Reconsidering the Resilience of Pastoralism from the Perspective of Reliability: The Case of Conflicts between the Samburu and the Pokot of Kenya, 2004-2009

2021 ◽  
Vol 25 (2) ◽  
pp. 253-277
Author(s):  
Shinya Konaka
Keyword(s):  
Mobile Phone ◽  
Real Time ◽  
Time Management ◽  
Ethnographic Case Study ◽  
High Input ◽  
Theoretical Frameworks ◽  
Mobile Phone Network ◽  
Process Variance ◽  
Output Variance

This article explores an overlooked aspect of the 'resilience of pastoralism' in crises through an ethnographic case study of a series of conflicts between the Samburu and the Pokot in Kenya that erupted in 2004. Emery Roe's concepts of reliability professionals and real-time management of pastoralists are utilised as theoretical frameworks for this study. It was observed that the 'logic of high input variance matched by high process variance to ensure low and stable output variance' occurred through the formation of clustered settlements and an inter-ethnic mobile phone network. This case illustrates how pastoralists endured the conflict as reliability professionals.

The South Carolina Digital Watershed: End-to-End Support for Real-Time Management of Water Resources

2010 ◽  
Vol 6 (1) ◽  
pp. 970868 ◽  
Author(s):  
G. W. Eidson ◽  
S. T. Esswein ◽  
J. B. Gemmill ◽  
J. O. Hallstrom ◽  
T. R. Howard ◽  
...  
Keyword(s):  
South Carolina ◽  
Water Resources ◽  
Real Time ◽  
Time Management ◽  
State Level ◽  
Data Streaming ◽  
The South ◽  
Core System ◽  
End To End

Water resources are under unprecedented strain. The combined effects of population growth, climate change, and rural industrialization have led to greater demand for an increasingly scarce resource. Ensuring that communities have adequate access to water—an essential requirement for community health and prosperity—requires finegrained management policies based on real-time in situ data, both environmental and hydrological. To address this requirement at the state level, we have developed the South Carolina Digital Watershed, an end-to-end system for monitoring water resources. In this paper, we describe the design and implementation of the core system components: (i) in situ sensing hardware, (ii) collection and uplink facilities, (iii) data streaming middleware, and (iv) back-end repository and presentation services. We conclude by discussing key organizational and technical challenges encountered during the development process.

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