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An Interaction Model Based on An Interpretation of the First-Quantized Relativistic Schrodinger Equation

Khalid Md. Nor, Ithnin Abdul Jalil, Hassan Abu Kasim

Sains Malaysiana, 1996;25.

The relativistic Schrodinger equation is reinterpreted as describing a classical particle that mutually-interacts with other objects via electromagnetic-like gravity waves. The accompanying derivation equates the usual quantum mechanical energy and momentum operators to the effects of negative or attractive energy. Lorentz-like transformation equations are obtained that yield the uncertainty principle such that quantum uncertainty is ascribed to the disregard of a magnetic-like component of a gravity wave. Finally, quantum-level Maxwell-like equations that involve the above gravity waves are derived.
Persamaan Schrodinger kerelatifan ditafsirkan sebagai memperihalkan suatu zarah klasik yang berinteraksi dengan jasad-jasad lain melalui gelombang graviti yang berciri keelektromagnetan. Terbitan sampingan menyamakan pengoperasi-pengeoperasi tenaga dan momentum mekanik kuantum dengan kesan-kesan tenaga negatif atau tarikan. Persamaan-persamaan bermirip transformasi Lorentz diperolehi yang menerbitkan prinsip ketakpastian dan memberi ketakpastian kuantum sebagai kesan pengabaian bahagian gelombang graviti yang bermirip kemagnetan. Akhir sekali, persamaan-persamaan diparas kuntum yang bermirip persamaan-persamaan Maxwell diterbitkan dan melibatkan gelombang graviti yang tersebut di atas.
Fulltext Concerns, perceived impact, and preparedness of oral healthcare workers in their working environment during COVID-19 pandemic

Chaudhary FA, Ahmad B, Ahmad P, Khalid MD, Butt DQ, Khan SQ

J Occup Health, 2020 Jan;62(1):e12168.
PMID: 32951286 DOI: 10.1002/1348-9585.12168

OBJECTIVE: The aim of the study was to evaluate the oral healthcare workers' concerns, perceived impact, and preparedness in COVID-19 pandemic.
METHODS: This cross-sectional study was carried out at 10 different dental hospitals in Pakistan from March to June 2020. A 35 items valid and reliable questionnaire was used to assess the concerns, perceived impact, and preparedness of oral healthcare workers (OHCW) in COVID-19 pandemic. Chi-squared test and logistic regression were used for analysis.
RESULTS: A total of 583 OHCW participated in this study. The odds of having the awareness about the risk of exposure and fear of getting infected, were greater in the clinical than non-clinical OHCW (OR: 52.6; OR: 15.9). For social network concerns, the clinical OHCW were more likely to be concerned about their colleagues (OR: 6.0). The clinical OHCW have greater odds of worrying about telling the family/friends about the risk exposed to (OR: 2.55), being avoided because of the job (OR: 3.20) and more likely to be feeling stressed (OR: 4.31). Less than 50% of the participants felt that their institutions are well prepared and only 12.6% had attended an infection control training session. Most participants practiced self-preparation such as buying masks and disinfection (94.3%, 98.3%).
CONCLUSION: The majority of OHCW felt concerned about their risk of exposure to infection and falling ill from exposure and infecting friends/family. There is a need for training of infection control and PPE and minimizing fear and psychological impact on OHCW should be the priority in any preparedness and planning for combating COVID-19.
Factors influencing COVID-19 vaccine hesitancy and acceptance among the Pakistani population

Chaudhary FA, Ahmad B, Khalid MD, Fazal A, Javaid MM, Butt DQ

Hum Vaccin Immunother, 2021 Oct 03;17(10):3365-3370.
PMID: 34236952 DOI: 10.1080/21645515.2021.1944743

This study examined the factors associated with acceptance of the COVID-19 vaccine compared to hesitance in the Pakistani population and specifically focusing on the perceived beliefs, knowledge, concerns, risk, and safety perception relating to the COVID-19 vaccine. A total of 423 subjects were recruited from the Pakistan Institute of Medical Sciences, Islamabad, Pakistan. A 27-item valid and reliable questionnaire was used to assess socio-demographic characteristics, acceptance, and hesitance toward COVID-19 vaccine, perceived beliefs, knowledge, perceived concerns, risk, and safety of COVID-19 vaccines and its source of information. Chi-square tests and logistic regression were used for analysis. About 53% of the participants were planning to get vaccinated and a significantly greater proportion of better educated, higher income, and healthier participants in the vaccine acceptance group (p
Psychometric properties of the Urdu version of the Geriatric Oral Health Assessment Index (GOHAI) and oral health-related quality of life in the elder Pakistani population

Chaudhary FA, Siddiqui YD, Yaqoob MA, Khalid MD, Butt DQ, Hameed S

Gerodontology, 2021 Dec;38(4):366-372.
PMID: 33403694 DOI: 10.1111/ger.12531

OBJECTIVE: The study aimed to translate the English version of the Geriatric Oral Health Assessment Index, assess its reliability and validity, and demonstrate its psychometric properties with regard to OHRQoL in the elder Pakistani population.
MATERIAL AND METHODS: In this cross-sectional study, 408 elder people were randomly recruited from three day-care centres. In the translation process, the translated Urdu version was reviewed by a committee of experts, followed by back-translation into English and re-reviewed by the same committee of experts. The questionnaire sought information about socio-demographic characteristics information and self-perception of oral, general health and treatment needs. OHRQoL was examined using GOHAI-U, and intraoral examination recorded the decayed, missing, and filled teeth. Reliability, internal consistency, convergent and discriminant validity of GOHAI-U were examined.
RESULTS: The mean GOHAI-U score was 40.2 (SD = 5.7, range = 20-55). The Cronbach's alpha for GOHAI score was 0.71, item-scale correlation coefficients ranged from 0.63 to 0.76, and test-retest correlation ranged from 0.59 to 0.74. Three factors supported the theoretical construction in the component factor analysis of the index. For convergent validity, there was a significant relationship between the GOHAI score and self-perceived oral, general health and treatment needs (P