Results 41 to 50 of about 4,222,853 (324)

Theoretical Challenges for Distance Education in the 21st Century: A shift from structural to transactional issues

International Review of Research in Open and Distributed Learning, 2000
The premise of this article is that theoretical frameworks and models are essential to the long-term credibility and viability of a field of practice. In order to assess the theoretical challenges facing the field of distance education, the significant ...
Randy Garrison
doaj   +3 more sources

Anche la teoria della disoccupazione è storicamente condizionata. (The theory of unemployment, too, is historically conditioned)

Moneta e Credito, 2013
La realtà sociale che i modelli cercano di interpretare i cambiamenti nel tempo . Tutti i modelli sono storicamente condizionati , ma alcuni sono più di altri .
P. SYLOS LABINI
doaj   +1 more source

Threshold Models for Trended Time Series [PDF]

, 2004
This paper presents the theoretical development of new threshold autoregressive models based on trended time series. The theoretical arguments underlying the models are outlined and a nonlinear economic model is used to derive the specification of the ...
Kapetanios, George
core   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Modeling and Experimental Analysis of Bias Voltage Effects on Hardness and Thickness of TiN Coatings Produced by PVD Process

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi
This study examines the impact of bias voltage on the mechanical properties and film thickness of TiN coatings deposited on cold work tool steel via the PVD process.
Ahmet Uğur Kaya
doaj   +1 more source

Analysis of the factors that prevent adherence to treatment in patients with diabetes mellitus and the strategies that contribute to the improvement in adherence

Сахарный диабет, 2018
This review examined the current problem of low adherence to treatment in patients with chronic diseases, particularly type 2 diabetes mellitus. According to the definition of the World Health Organization, ‘adherence to treatment’ is the ...
Natalia V. Likhodey, Marina F. Kalashnikova, Elena M. Likhodey, Valentin V. Fadeyev   +3 more
doaj   +1 more source

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

Low carbon manufacturing: Characterization, theoretical models and implementation [PDF]

, 2008
Today, the rising of carbon dioxide (CO2) emissions is becoming the crucial factor for global warming especially in industrial sectors. Therefore, the research to reduce carbon intensity and enhance resources utilization in manufacturing industry is ...
Cheng, K, Tridech, S
core   +1 more source

Design of 3D Magnetic Tactile Sensors with High Sensing Accuracy Guided by the Theoretical Model [PDF]

, 2023
Xiaocheng Hu, Heng Zhu, Ruiwen Chen, Sideng Hu, Zheng Jia, Honghui Yu, Shaoxing Qu   +6 more
openalex   +1 more source

Understanding with Theoretical Models [PDF]

Journal of Economic Methodology, 2014
This paper discusses the epistemic import of highly abstract and simplified theoretical models using Thomas Schelling’s checkerboard model as an example. We argue that the epistemic contribution of theoretical models can be better understood in the context of a cluster of models relevant to the explanatory task at hand.
Aydinonat, N. Emrah, Ylikoski, Petri
openaire   +4 more sources