Recently we investigated in [SIAM J. Optim., 19 (2008), pp. 572–591] hierarchies of semidefinite approximations for the chromatic number χ(G) of a graph G. In particular, we introduced two hierarchies of lower bounds: the “ψ”-hierarchy converging to the fractional chromatic number and the “Ψ”-hierarchy converging to the chromatic number of a graph. In both hierarchies the first order bounds are...

Agarwal, R., Sambamurthy, V., and Stair, R. M. 2010. “Research Commentary—The Digital Transformation of Healthcare: Current Status and the Road Ahead,” Information Systems Research (21:4), pp. 796-809. Ajjawi, R., and Bearman, M. 2012. “Sociomateriality Matters to Family Practitioners as Supervisors,” Medical Education (46:12), pp. 1145-1147. Almklov, P. G., Østerlie, T., and Haavik, T. K. 2012...

AMA Filipiak K, Kot J, Ostrogórska-Gonszewska P, Leja-Szpak A, Matuszyk D. Vaccination of Polish pregnant women in the perinatal period against COVID -19. Nursing Problems / Problemy Pielęgniarstwa. 2023;31(1):12-20. doi:10.5114/ppiel.2023.129134. APA Filipiak, K., Kot, J., Ostrogórska-Gonszewska, P., Leja-Szpak, A., & Matuszyk, (2023). Pielęgniarstwa, 31(1), 12-20. https://doi.org/10.5114/ppie...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Recen D, Başer A, Yıldırım B. Dental students’ perceptions of distance learning in terms various variables during a transition due to COVID-19. Journal Stomatology. 2021;74(2):116-123. doi:10.5114/jos.2021.106498. APA Recen, D., Başer, A., & Yıldırım, (2021). Stomatology, 74(2), 116-123. https://doi.org/10.5114/jo...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Hamed SA, Waked NM, Helmy AM. Effect of virtual reality games on motor performance level in children with spastic cerebral palsy. Physiotherapy Quarterly. 2022;30(2):15-19. doi:10.5114/pq.2021.108681. APA Hamed, S. A., Waked, N. M., & Helmy, A. M. (2022). Quarterly, 30(2), 15-19. https://doi.org/10.5114/pq.2021.10...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Singh Dhillon H, Sasidharan S. COVID-19 PANDEMIC AND WOMEN. Health Problems of Civilization. 2021;15(3):161-163. doi:10.5114/hpc.2021.107176. APA Dhillon, H., & Sasidharan, (2021). Civilization, 15(3), 161-163. https://doi.org/10.5114/hpc.2021.107176 Chicago Harpreet, and Shibu Sasidharan. 2021. "COVID-19 WOMEN". ...

The gas-liquid membrane contactor (GLMC) is a promising alternative gas absorption/desorption configuration for effective carbon dioxide (CO2 ) capture. The physicochemical properties of membranes may synergistically affect GLMC performances, especially during the long-term operations. In this work, commercial polypropylene (PP) and polyvinylidene fluoride (PVDF) hollow fiber (HF) membranes wer...

AMA Wołek M, Matusiak K, Machoczek P, Partyka Ł, Zasada W. Corrected QT interval in electrocardiogram recordings patients treated with calcium channel blockers. Advances Interventional Cardiology/Postępy w Kardiologii Interwencyjnej. 2023;19(2):171-177. doi:10.5114/aic.2023.129216. APA Wołek, M., Matusiak, K., Machoczek, P., Partyka, Ł., & Zasada, (2023). Interwencyjnej, 19(2), 171-177. https:/...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Pisarek E, Lesińska-Sawicka M, Ciesielska A. Assessment of the knowledge nurses from surgical wards and primary health care about importance proper nutrition in a patient with chronic wound – preliminary study. Leczenie Ran. 2022;19(3):77-83. doi:10.5114/lr.2022.120198. APA Pisarek, E., Lesińska-Sawicka, M., & Cie...