The energy spectrum of nucleons in high-density nuclear matter is investigated in the framework of relativistic meson-nucleon manybody theory, employing the 1/N expansion method. The coupling of the nucleon with the particle-hole excitations in the medium flattens the spectra in the vicinity of the Fermi surface. The effect grows logarithmically for increasing density and eventually leads to in...

In this article, the second in a series on the basic concepts of research, the authors review aspects of research design including participant considerations, randomization, reliability and validity of measurements, and data collection and management. The authors also discuss considerations for research using questionnaires and tests. The goal of this article is to assist the novice researcher ...

Brooks proved that the chromatic number of a loopless connected graph G is at most the maximum degree of G unless G is an odd cycle or a clique. This note proves an analogue of this theorem for GF (p)-representable matroids when p is prime, thereby verifying a natural generalization of a conjecture of Peter Nelson.

Differences between traditional laboratory research and Internet-based research require a review of basic issues of research methodology. These differences have implications for research ethics (e.g., absence of researcher, potential exposure of confidential data and/or identity to a third party, guaranteed debriefing) and security (e.g., confidentiality and anonymity, security of data transmis...

The present study assessed the construct validity and reliability of a researcher-constructed psycho-motor mechanism scale based on the communicative theory of translation proposed by PACTE (2003). In doing so, the necessary criteria for designing the scale were obtained by a thorough review of related literature on previously constructed scales in error analysis or holistic ones. Moreover, in ...

The present study assessed the construct validity and reliability of a researcher-constructed psycho-motor mechanism scale based on the communicative theory of translation proposed by PACTE (2003). In doing so, the necessary criteria for designing the scale were obtained by a thorough review of related literature on previously constructed scales in error analysis or holistic ones. Moreover, in ...

The present study assessed the construct validity and reliability of a researcher-constructed psycho-motor mechanism scale based on the communicative theory of translation proposed by PACTE (2003). In doing so, the necessary criteria for designing the scale were obtained by a thorough review of related literature on previously constructed scales in error analysis or holistic ones. Moreover, in ...

This study offers a method for empirically testing theories operationalized in the form of multivariate statistical models. An innovation of the method is that it distinguishes testing into three separate forms, “effect testing,” “prediction testing,” and “theory testing,” where statistical significance plays a separate role in each one. In another innovation, the researcher specifies not only ...

Although there is an abundance of literature about how to conduct qualitative research and some consideration of possible threats to researchers' psychological well-being, there is little mention of the personal safety issues that researchers face while in the field. Few researchers have attempted to address the issue of researcher safety as a methodological concern. Consequently, there are min...