Journal articles on the topic 'Determinants'
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Delciellos, Ana C., Marcus V. Vieira, Carlos E. V. Grelle, Priscilla Cobra, and Rui Cerqueira. "Habitat quality versus spatial variables as determinants of small mammal assemblages in Atlantic Forest fragments." Journal of Mammalogy 97, no. 1 (October 30, 2015): 253–65. http://dx.doi.org/10.1093/jmammal/gyv175.
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Abstract Fragment size, isolation, and matrix properties have received considerable attention as predictors of species richness, abundance, and composition in habitat patches. However, measurements of habitat attributes or habitat quality are more directly related to the proximate effects of habitat fragmentation and may be more determinant of assemblages than traditional explanatory variables at local scales. We determine how habitat structure in fragments—a measure of habitat quality—compares to fragment size, isolation, and matrix properties as determinants of richness, abundance, and composition of non-volant small mammals in a fragmented landscape of Atlantic Forest. Small mammals were surveyed once in 25 fragments in the Macacu River watershed, Rio de Janeiro, Brazil, from 1999 to 2001 and 2005 to 2009. A total of 83 candidate models were formulated and compared by Akaike Information Criteria. Habitat structure was one of the main determinants of small mammal assemblages in fragments, as important as fragment isolation for species composition and climatic season for species richness. Rodents were more abundant in fragments with increased overstory and understory vegetation density and more fallen logs. The contrary pattern was found for overall species richness and for species of terrestrial habit, which were more abundant in fragments with more open forest: decreased overstory and understory vegetation density and less fallen logs. Habitat quality in fragments may be a more important determinant of assemblages of small mammals and other vertebrates than previously considered in landscape and land use studies. O tamanho e isolamento dos fragmentos e as propriedades da matriz têm recebido considerável atenção como preditores da riqueza, abundância e composição de espécies em manchas de habitat. Entretanto, medidas dos atributos do habitat ou da qualidade do habitat são mais diretamente relacionadas aos efeitos imediatos da fragmentação de habitat, e seriam mais determinantes das comunidades do que as variáveis explicativas tradicionais. Determinamos como a estrutura do habitat nos fragmentos—uma medida da qualidade do habitat—se compara ao tamanho e isolamento dos fragmentos, e às propriedades da matriz como determinantes da riqueza, abundância e composição de espécies de pequenos mamíferos não-voadores em uma paisagem fragmentada de Mata Atlântica. Os pequenos mamíferos foram amostrados uma vez em 25 fragmentos na Bacia do Rio Macacu, Rio de Janeiro, Brasil, de 1999 a 2001 e de 2005 a 2009. Um total de 83 modelos foram formulados e comparados utilizando o Critério de Informação de Akaike. A estrutura do habitat foi um dos principais determinantes das comunidades de pequenos mamíferos nos fragmentos de mata, tão importante quanto o isolamento entre fragmentos para a composição de espécies e os efeitos das estações climáticas sobre a riqueza de espécies. Os roedores foram mais abundantes nos fragmentos com estratificação vertical e sub-bosque mais densos e com maior presença de troncos caídos. O padrão contrário foi encontrado para a riqueza total de espécies e para espécies de hábito terrestre, que foram mais abundantes em fragmentos com estratificação vertical e sub-bosque menos densos e menor presença de troncos caídos. A qualidade do habitat em fragmentos pode ser determinante das comunidades de pequenos mamíferos e outros vertebrados, mais importante do que considerado previamente em estudos de paisagens e uso da terra.
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FRY, M. P. "FERMION DETERMINANTS." International Journal of Modern Physics A 17, no. 06n07 (March 20, 2002): 936–45. http://dx.doi.org/10.1142/s0217751x02010339.
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The current status of bounds on and limits of fermion determinants in two, three and four dimensions in QED and QCD is reviewed. A new lower bound on the two-dimensional QED determinant is derived. An outline of the demonstration of the continuity of this determinant at zero mass when the background magnetic field flux is zero is also given.
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Roberts, M. C., W. O. Chung, and D. E. Roe. "Characterization of tetracycline and erythromycin resistance determinants in Treponema denticola." Antimicrobial Agents and Chemotherapy 40, no. 7 (July 1996): 1690–94. http://dx.doi.org/10.1128/aac.40.7.1690.
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Treponema denticola isolates were evaluated for the presence of known tetracycline and erythromycin resistance determinants by Southern blot hybridization of whole-cell DNA and PCR assays. We examined all isolates available, which included 12 clinical and 4 American Type Culture Collection isolates. Two isolates carried the Tet B determinant, five isolates carried both the Tet B and Erm F determinants, seven isolates carried the Erm F determinant, and two did not carry any of the Tet or Erm determinants tested. Both the Tet B and Erm F determinants appeared to be associated with the chromosome. Neither of the two T. denticola donors tested could transfer the Tet B determinant, but three of four T. denticola tested transferred the Erm F determinant to an Enterococcus faecalis recipient. This extends the host range of both the tetB and ermF genes into the genus Treponema.
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Takaeb, Afrona Elisabeth Lelan. "Explaining Causes Of Inequity In Public Health : A Narrative Review." INDONESIAN JOURNAL OF HEALTH SCIENCES RESEARCH AND DEVELOPMENT (IJHSRD) 4, no. 2 (December 26, 2022): 70–75. http://dx.doi.org/10.36566/ijhsrd/vol4.iss2/133.
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Objectives: This paper attempts to explain the term inequity in public health based on The Rainbow Model introduced by Dahlgreen & Whitehead (1991) and The Social determinant of Health (SDH) framework of the Commision of Social Determinants of Health). Methods: The author applied a narrative review and examined 29 relevant English literatures and found two themes. Results: First, Explanation of The Rainbow Model’ introduced by Dahlgreen & Whitehead (1991) and The SDH framework of the Commision of Social Determinants of Health. Second, the perspective of traditional public health emphasizes the proximal determinants while New Public health emphasis on intermediate determinants and distal determinants. Conclusions: Therefore, as a public health professional need to consider about proximal, intermediate and distal determinant of public health issue.
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Jenkins, R. N., C. J. Aldrich, L. A. Lopez, and R. R. Rich. "Oligosaccharide-dependent and independent Qa-1 determinants." Journal of Immunology 134, no. 5 (May 1, 1985): 3218–25. http://dx.doi.org/10.4049/jimmunol.134.5.3218.
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Abstract A contribution of N-linked oligosaccharides to determinants recognized by alloreactive cytotoxic T lymphocytes has not been demonstrated. Employing cloned CTL and tunicamycin, an inhibitor of protein glycosylation, we found that carbohydrate addition was required for the formation of two of six Qa-1 determinants. The other determinants were detectable on nonglycosylated Qa-1 molecules, similar to observations in most reports that allodeterminants on class I molecules are not dependent on glycosylation for serologic detection. Examination of TM-treated, Con A-activated lymphoblasts revealed a direct correlation between the determinants defined by the reactivity of CTL clones with target cells from four Qa-1 genotypes and their dependence on carbohydrate side chains for expression. Most anti-Qa-1b CTL clones recognized either a glycosylation-dependent determinant found only on Qa-1b cells or glycosylation-independent determinants on both Qa-1b and Qa-1c cells. Similarly, clones that killed only Qa-1a cells recognized a glycosylation-independent determinant. However, clones reactive with both Qa-1a and Qa-1d cells recognized a glycosylation-dependent determinant on Qa-1a molecules and a glycosylation-independent determinant on Qa-1d molecules. This result indicates that such clones recognize cross-reactive conformational determinants, not carbohydrate itself. Thus, N-linked oligosaccharides serve to stabilize the conformation of some Qa-1 determinants, but others remain intact on nonglycosylated molecules. The absence of similar data for H-2K/D/L molecules suggest that a reexamination of other class I antigens with cloned CTL is in order to determine whether Qa-1 molecules are unique.
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Yu, M., J. M. Johnson, and V. K. Tuohy. "A predictable sequential determinant spreading cascade invariably accompanies progression of experimental autoimmune encephalomyelitis: a basis for peptide-specific therapy after onset of clinical disease." Journal of Experimental Medicine 183, no. 4 (April 1, 1996): 1777–88. http://dx.doi.org/10.1084/jem.183.4.1777.
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The development of autoimmune disease is accompanied by the acquired recognition of new self-determinants, a process commonly referred to as determinant spreading. In this study, we addressed the question of whether determinant spreading is pathogenic for progression of chronic-relapsing experimental autoimmune encephalomyelitis (EAE), a disease with many similarities to multiple sclerosis (MS). Our approach involved a systematic epitope mapping of responses to myelin proteolipid protein (PLP) as well as assaying responses to known encephalitogenic determinants of myelin basic protein (MBP 87-89) and myelin oligodendrocyte glycoprotein (MOG 92-106) at various times after induction of EAE in (SWR X SJL)F1 mice immunized with PLP 139-151. We found that the order in which new determinants are recognized during the course of disease follows a predictable sequential pattern. At monthly intervals after immunization with p139-151, responses to PLP 249-273, MBP 87-99, and PLP 137-198 were sequentially accumulated in al mice examined. Three lines of evidence showed that determinant spreading is pathogenic for disease progression: (a) spreading determinants mediate passive transfer of acute EAE in naive (SWR X SJL)F1 recipients; (b) an invariant relationship exists between the development of relapse/progression and the spreading of recognition to new immunodominant encephalitogenic determinants; and (c) after EAE onset, the induction of peptide-specific tolerance to spreading but not to nonspreading encephalitogenic determinants prevents subsequent progression of EAE. Thus, the predictability of acquired self-determinant recognition provides a basis for sequential determinant-specific therapeutic intervention after onset of the autoimmune disease process.
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Borodin, Alexei, and Andrei Okounkov. "A Fredholm determinant formula for Toeplitz determinants." Integral Equations and Operator Theory 37, no. 4 (December 2000): 386–96. http://dx.doi.org/10.1007/bf01192827.
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Chen, Kwang-Wu. "Horadam Sequences and Tridiagonal Determinants." Symmetry 12, no. 12 (November 28, 2020): 1968. http://dx.doi.org/10.3390/sym12121968.
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We consider a family of particular tridiagonal matrix determinants which can represent the general second-order linear recurrence sequences. These determinants can be changed to symmetric or skew-symmetric tridiagonal determinants. To evaluate the complex factorizations of any Horadam sequence, we evaluate the eigenvalues of some special tridiagonal matrices and their corresponding eigenvectors. We also use these determinant representations to obtain some formulas in these sequences.
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Nunes, Paulo Maçãs, Sílvia Mendes, and Zélia Serrasqueiro. "SMES’ INVESTMENT DETERMINANTS: EMPIRICAL EVIDENCE USING QUANTILE APPROACH." Journal of Business Economics and Management 13, no. 5 (October 4, 2012): 866–94. http://dx.doi.org/10.3846/16111699.2011.620172.
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This paper makes an important contribution to the literature on SMEs, namely investigating whether the relationships between determinants and investment are dependent on the level of investment. Based on a sample of Portuguese SMEs, using two-step estimation method, firstly using probit regression and secondly using quantile regressions, we find significant non-linearities in relationships formed between determinants and investment over the distribution of investment. In particular, we find that: 1) sales, age and growth opportunities are restrictive determinants of investment for low levels of investment, but positive determinants of investment for high levels of investment; 2) debt and the interest rate are restrictive determinants of investment but only for low and intermediate levels of investment; 3) cash flow is a positive determinant of investment, but is more important for investment regarding low levels of investment; 4) GNP is a positive determinant of investment, but only for high levels of investment; and 5) investment in the previous period is a positive determinant of investment in the present period, but only for intermediate and high levels of investment. The relevance of the various theories explaining firm investment depends on SMEs’ level of investment.
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Wetta, Ruth E., Roberta D. Severin, and Heidi Gruhler. "An evidence-based strategy to achieve equivalency and interoperability for social-behavioral determinants of health assessment, storage, exchange, and use." Health Informatics Journal 26, no. 2 (October 29, 2019): 1477–88. http://dx.doi.org/10.1177/1460458219882265.
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The interoperable exchange of social-behavioral determinants of health data is challenging due to complex factors including multiple recommendations, multiple tools with varying domains, scoring, and cutpoints, and lack of terminology code sets for storing assessments and findings. This article describes a strategy that permits scoring by social-behavioral determinants of health domain to create interoperability and equivalency across tools, settings, and populations. The three-tier scoring strategy converts social-behavioral determinants of health data to (1) be used immediately at point of care by identifying social needs or social risk factors, (2) be consumed within analytics and algorithms and for secondary analysis, and (3) produce total scores that reflect social determinant burden and behavioral determinant burden across populations and settings within a healthcare system. The strategy supports the six uses recommended by the National Academy of Medicine, provides flexibility in choice of social-behavioral determinants of health tool, and leverages the power of social-behavioral determinants of health data in healthcare delivery.
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Lestari, Arum Seftiani, Siswanto Pabidang, Heru Subaris Kasjono, Atik Ba'diah, Rizki Amartani, and Yolanda Montessori. "Determinan kematian neonatal di Kabupaten Sintang Kalimantan Barat tahun 2022." Jurnal SAGO Gizi dan Kesehatan 4, no. 2 (June 12, 2023): 222. http://dx.doi.org/10.30867/gikes.v4i2.1165.
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Background: neonatal mortality is an indicator to take a look at the degree of public health because health progress is seen from the seriousness of all elements of society in reducing neonatal mortality. 2017 Indonesian Demographic and Health Survey (IDHS) showed that 15/1,000 live births occurred during the neonatal period. This research was conducted to analyze the determinants of neonatal mortality in the Sintang district in 2022.Objective: to analyze what are the determinants that affect neonatal mortality in Sintang District, West Kalimantan 2022.Methods: mix method research with sequential explanatory design. Beginning with a descriptive quantitative research design by looking at medical record data, followed by qualitative research in the form of in-depth interviews. which combines quantitative and qualitative. Quantitative research samples totaled 52 cases and qualitative samples totaled 11 informants. Research time October to November 2022.Results: the quantitative results of the near determinant of neonatal mortality were asphyxia at 44.2% and premature at 19.2%, the intermediate determinant was due to maternal age at 61.5%, and gestational age at 53.8%, the determinant of distance was due to ANC examination 36.5% and the distance house 30.8%. The qualitative results of the determinants of distance are irregular ANC, delivery assistance by non-medical personnel, place of delivery without health facilities, and distance from home to health facilities, intermediate determinants are the age of at-risk mothers, high parity, a distance of at-risk pregnancies and complications of pregnancy and childbirth, determinants of near-death neonatal are asphyxia, premature and pneumonia.Conclusion: causes of neonatal mortality in Sintang District occur from close determinants (asphyxia and premature), intermediate determinants (age of mother and gestation), and distant determinants (ANC examination and distance from home).
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Nakamura, Yatsuka. "Determinant of Some Matrices of Field Elements." Formalized Mathematics 14, no. 1 (January 1, 2006): 1–5. http://dx.doi.org/10.2478/v10037-006-0001-4.
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Determinant of Some Matrices of Field Elements Here, we present determinants of some square matrices of field elements. First, the determinat of 2 * 2 matrix is shown. Secondly, the determinants of zero matrix and unit matrix are shown, which are equal to 0 in the field and 1 in the field respectively. Thirdly, the determinant of diagonal matrix is shown, which is a product of all diagonal elements of the matrix. At the end, we prove that the determinant of a matrix is the same as the determinant of its transpose.
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Maciocco, Gavino. "I determinanti della salute: alla ricerca di un conceptual framework." SALUTE E SOCIETÀ, no. 1 (March 2009): 31–42. http://dx.doi.org/10.3280/ses2009-001004.
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- This paper describes how the "conceptual frameworks" of Health Determinants evolved, up to the most recent one, proposed by the Who Commission on Social Determinants of Health. Of special interest is the importance given to Health Systems as potential determinants of health inequities when they fail to protect against social and economic consequences of disease. Key words: social determinants of health, health equity, health systems, lifestyles, social networks. Parole chiave: determinanti sociali di salute, equitÀ nella salute, sistemi sanitari, stili di vita, reti sociali.
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Stephens, R. S., E. A. Wagar, and G. K. Schoolnik. "High-resolution mapping of serovar-specific and common antigenic determinants of the major outer membrane protein of Chlamydia trachomatis." Journal of Experimental Medicine 167, no. 3 (March 1, 1988): 817–31. http://dx.doi.org/10.1084/jem.167.3.817.
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The principal surface protein antigen of Chlamydia trachomatis is the major outer membrane protein (MOMP). The MOMP is antigenically complex. Among the 15 serovars of C. trachomatis, mAbs define serovar-, subspecies-, and species-specific determinants on MOMP. The molecular basis of the antigenic diversity of these proteins is reflected in amino acid variable sequence domains. We have mapped the dominant topographic antigenic determinants of MOMP that are defined by mAbs. Using recombinant DNA approaches we have identified the linear distribution of two antigenic domains. One domain contains a serovar-specific determinant and the other contains subspecies- and species-specific determinants. These antigenic domains correspond to two amino acid sequence variable domains. Synthetic peptides were immunogenic and these resolved the serovar-specific determinant within a 14-amino acid peptide. The subspecies- and species-specific determinants were overlapping within a 16-amino acid peptide.
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Tam, Patricia E., Melissa L. Weber-Sanders, and Ronald P. Messner. "Multiple Viral Determinants Mediate Myopathogenicity in Coxsackievirus B1-Induced Chronic Inflammatory Myopathy." Journal of Virology 77, no. 21 (November 1, 2003): 11849–54. http://dx.doi.org/10.1128/jvi.77.21.11849-11854.2003.
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ABSTRACT Mice infected with myopathic coxsackievirus B1 Tucson (CVB1T) develop chronic inflammatory myopathy (CIM) consisting of hind limb weakness and inflammation. Amyopathic virus variants are infectious but attenuated for CIM. In this report, viral clones, chimeras, and sequencing were used to identify viral determinants of CIM. Chimeras identified several regions involved in CIM and localized a weakness determinant to nucleotides 2493 to 3200 of VP1. Sequencing of multiple clones and viruses identified five candidate determinants that were strictly conserved in myopathic viruses with one located in the 5′ untranslated region (UTR), three in the VP1 capsid, and one in the 3C protease. Taken together, these studies implicate Tyr-87 and/or Val-136 as candidate determinants of weakness. They also indicate that there are at least two determinants of inflammation and one additional determinant of weakness encoded by myopathic CVB1T.
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Tiwari, Saraswoti. "Money Supply Determinants in Nepal: A Macro Analysis." Economic Literature 13 (February 8, 2018): 55. http://dx.doi.org/10.3126/el.v13i0.19151.
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<p>This paper analyzes the major money supply determinants in Nepal in the past 10 years from FY 2004/05 - FY 20014/15. In this study monetary base is determined by two explanatory variables (i.e. NFA and NDC) and are called the 'proximate' determinants of the base money. Among the explanatory variables, the net foreign asset (NFA) is found as better determinant than net domestic assets (NDA) in Nepalese economy. For the analysis of determinants of money multiplier (MM), the three explanatory variables i.e., reserve to total deposits ratio (r), time deposits to demand deposits ratio (t) and currency to demand deposits ratio (c) have been used. The model applied in this study shows that explanatory variable of time deposits to demand deposits ratio is the best determinant of money multiplier. The reserve money (RM) is analyzed as the best determinant of money supply, net foreign assets (NFA) is the major determinant of reserve money and time deposits to demand deposits ratio is the significant determinant of money multiplier.</p><p> <strong><em>Economic Literature</em></strong><em>, </em>Vol. XIII August 2016, page 55-60</p>
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Myung, Sung. "A Topology on Milnor’s Group of a Topological Field and Continuous Joint Determinants." International Journal of Mathematics and Mathematical Sciences 2017 (2017): 1–5. http://dx.doi.org/10.1155/2017/4349153.
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For the tuple set of commuting invertible matrices with coefficients in a given field, the joint determinants are defined as generalizations of the determinant map for the square matrices. We introduce a natural topology on Milnor’s K-groups of a topological field as the quotient topology induced by the joint determinant map and investigate the existence of a nontrivial continuous joint determinant by utilizing this topology, generalizing the author’s previous results on the continuous joint determinants for the commuting invertible matrices over R and C.
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McCarthy, P. J. "A Generalization of Smith's Determinant." Canadian Mathematical Bulletin 29, no. 1 (March 1, 1986): 109–13. http://dx.doi.org/10.4153/cmb-1986-020-1.
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AbstractWe shall evaluate the determinants of n x n matrices of the form [f(i,j)], where f (w, r) is an even function of m (mod r). Among the examples of determinants of this kind are H. J. S. Smith's determinant det [(i,j)], where (m, r) is the greatest common divisor of m and r, and a generalization of Smith's determinant due to T. M. Apostol.
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Horáček, Jaroslav, Milan Hladík, and Josef Matějka. "Determinants of Interval Matrices." Electronic Journal of Linear Algebra 33 (May 16, 2018): 99–112. http://dx.doi.org/10.13001/1081-3810.3719.
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In this paper we shed more light on determinants of real interval matrices. Computing the exact bounds on a determinant of an interval matrix is an NP-hard problem. Therefore, attention is first paid to approximations. NP-hardness of both relative and absolute approximation is proved. Next, methods computing verified enclosures of interval determinants and their possible combination with preconditioning are discussed. A new method based on Cramer's rule was designed. It returns similar results to the state-of-the-art method, however, it is less consuming regarding computational time. Other methods transferable from real matrices (e.g., the Gerschgorin circles, Hadamard's inequality) are discussed. New results about classes of interval matrices with polynomially computable tasks related to determinant are proved (symmetric positive definite matrices, class of matrices with identity midpoint matrix, tridiagonal H-matrices). The mentioned methods were compared for random general and symmetric matrices.
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Babarinsa, Olayiwola, Azfi Zaidi Mohammad Sofi, Asrul Hery Mohd, Akinola Eluwole, Imoni Sunday, Wakili Adamu, Benson Onojhojobi, et al. "NOTE ON THE HISTORY OF (SQUARE) MATRIX AND DETERMINANT." FUDMA JOURNAL OF SCIENCES 6, no. 3 (July 2, 2022): 177–90. http://dx.doi.org/10.33003/fjs-2022-0603-775.
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This paper reviews the theory of matrices and determinants. Matrix and determinant are nowadays considered inseparable to some extent, but the determinant was discovered over two centuries before the term matrix was coined. Our review associate determinant with the matrix as part of linear systems but not with polynomials. Thus, the paper first gives the background on matrix with vast applications in all fields of study and then reviews the history of determinants which is based on its major contributors in chronological order from the sixteenth century to the twenty-first century
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Ooi, Chye-Khoon, and Ming-Ming Lai. "An empirical investigation on determinants of executive directors’ remuneration in bursa Malaysia." Corporate Ownership and Control 6, no. 3 (2009): 570–83. http://dx.doi.org/10.22495/cocv6i3sip6.
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Executive directors’ remuneration may link to company performance. This paper investigates the determinants of executive directors’ remuneration of all public listed companies in Bursa Malaysia from 2004 to 2006. Multiple regression results indicated that tenure of an executive director has held the director’ position appeared to be the most significant determinant for executive directors’ remuneration. Duality emerged as second significant determinant except for Kuala Lumpur Composite Index (KLCI) component companies. Company performance and size were found as determinants except for KLCI component companies. The results also suggest that age and qualification are the weakest determinants for human capital variables. Overall, net profit was significant positive correlated with company size and particularly is evident for KLCI companies
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Bergen, Tom, Alice Hyun Min Kim, Anja Mizdrak, Louise Signal, Geoff Kira, and Justin Richards. "Determinants of Future Physical Activity Participation in New Zealand Adolescents across Sociodemographic Groups: A Descriptive Study." International Journal of Environmental Research and Public Health 20, no. 11 (May 30, 2023): 6001. http://dx.doi.org/10.3390/ijerph20116001.
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This cross-sectional study aimed to explore various determinants of future physical activity (PA) participation in adolescents across sociodemographic groups. Sociodemographic characteristics (age, gender, ethnicity, deprivation status, physical disability status) were assessed in a national sample (n = 6906) of adolescents (12–17 years old) between 2017 and 2020 in New Zealand. The determinants of future PA participation chosen for analysis included current indicators of PA participation (i.e., total time, number of types, number of settings). We also examined widely recognised modifiable intrapersonal (i.e., physical literacy) and interpersonal (i.e., social support) determinants of current and future PA behaviour, along with indicators of PA availability issues. Older adolescents scored worse across all determinants of future PA than younger adolescents, with a key transition point appearing at 14–15 years of age. Māori and Pacific ethnicities scored best across each determinant category on average, with Asian populations scoring the worst. Gender diverse adolescents scored substantially worse than male and female adolescents across every determinant. Physically disabled adolescents scored worse than non-disabled across all determinants. Adolescents from medium and high deprivation neighbourhoods scored similarly across most determinants of future PA participation and both tended to score worse than people from low deprivation neighbourhoods. A particular focus on the improvement of future PA determinants is warranted within adolescents who are older, Asian, gender diverse, physically disabled, and from medium to high deprivation neighbourhoods. Future investigation should prioritise the longitudinal tracking of PA behaviours over time and develop interventions that affect multiple future PA determinants across a range of sociodemographic backgrounds.
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Zhou, Tao. "Examining Mobile Banking User Trust." International Journal of E-Adoption 5, no. 3 (July 2013): 17–29. http://dx.doi.org/10.4018/ijea.2013070102.
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Building users’ trust is crucial to alleviating their perceived risk and facilitating their usage of mobile banking. Drawing on a tripartite perspective of transference-based, personality-based and self-perception-based determinants, this research examined mobile banking user trust. Transference-based determinants include structural assurance and online banking trust. Personality-based determinant is trust propensity. Self-perception-based determinants include system quality, information quality and service quality. The results indicated that these three kinds of determinants have significant effects on user trust. Among them, information quality, service quality and structural assurance have relatively larger effects. The results imply that service providers need to consider these three kinds of trust determinants in order to facilitate user trust in mobile banking.
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Appel, J. R., C. Pinilla, H. Niman, and R. Houghten. "Elucidation of discontinuous linear determinants in peptides." Journal of Immunology 144, no. 3 (February 1, 1990): 976–83. http://dx.doi.org/10.4049/jimmunol.144.3.976.
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Abstract Synthetic peptides, made by the method of simultaneous multiple peptide synthesis, were coupled to the protein carrier keyhole limpet hemocyanin and used to raise mAb. Omission and substitution analogs of the original peptides were tested by ELISA to characterize their reactivity with the respective mAb. Linear antigenic determinants were located for 18 different peptides by using omission analogs. The length of the antigenic determinants ranged from 2 to 8 residues, with an average of 6 residues. The three aromatic amino acids, phenylalanine, tryptophan, and tyrosine, the charged hydrophilic amino acids, aspartic acid and lysine, and the neutral amino acid alanine were found to occur most often in the determinant region of the peptides tested, whereas asparagine, cysteine, and histidine occurred the least often. Alanine substitution analogs provided more information than omission analogs by enabling the determination of which side chain groups of the antigenic determinant residues were not critical for binding to the mAb. Detailed, "fingerprint" information about the interaction of the peptide, GASPYPNLSNQQT, and its mAb was obtained by synthesizing a complete series of analogs with individual substitutions for each position of the antigenic determinant, PYPNLS, with the 19 other amino acids. These results suggest that, at the amino acid level, all antigenic determinants of synthetic peptides defined by mAb can be considered discontinuous linear determinants.
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Karambal, Issa, and Simon J. A. Malham. "Evans function and Fredholm determinants." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2174 (February 2015): 20140597. http://dx.doi.org/10.1098/rspa.2014.0597.
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We explore the relationship between the Evans function, transmission coefficient and Fredholm determinant for systems of first-order linear differential operators on the real line. The applications we have in mind include linear stability problems associated with travelling wave solutions to nonlinear partial differential equations, for example reaction–diffusion or solitary wave equations. The Evans function and transmission coefficient, which are both finite determinants, are natural tools for both analytic and numerical determination of eigenvalues of such linear operators. However, inverting the eigenvalue problem by the free-state operator generates a natural linear integral eigenvalue problem whose solvability is determined through the corresponding infinite Fredholm determinant. The relationship between all three determinants has received a lot of recent attention. We focus on the case when the underlying Fredholm operator is a trace class perturbation of the identity. Our new results include (i) clarification of the sense in which the Evans function and transmission coefficient are equivalent and (ii) proof of the equivalence of the transmission coefficient and Fredholm determinant, in particular in the case of distinct far fields.
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Davidson, Karina W., Kimberlee J. Trudeau, Erica van Roosmalen, Miriam Stewart, and Susan Kirkland. "Perspective: Gender as a Health Determinant and Implications for Health Education." Health Education & Behavior 33, no. 6 (May 31, 2006): 731–43. http://dx.doi.org/10.1177/1090198106288043.
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Gender is a health determinant, but gender itself is influenced, in part, by biological and psychological variables. Understanding gender's influence on health therefore requires an understanding of the determinants of the construct gender. A review of certain gender determinants is presented. The authors consider the modifiability of these determinants and present recommendations about which of these determinants should be targeted for health promotion and policy creation activities. In concluding, they argue that gender is a multidetermined construct that encompasses many factors that may be modifiable through intervention, and consideration of all of these factors should be vigorously pursued.
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Wang, Nianliang, Kalyan Chakraborty, and Shigeru Kanemitsu. "Unification of Chowla’s Problem and Maillet–Demyanenko Determinants." Mathematics 11, no. 3 (January 28, 2023): 655. http://dx.doi.org/10.3390/math11030655.
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Chowla’s (inverse) problem (CP) is to mean a proof of linear independence of cotangent-like values from non-vanishing of L(1,χ)=∑n=1∞χ(n)n. On the other hand, we refer to determinant expressions for the (relative) class number of a cyclotomic field as the Maillet–Demyanenko determinants (MD). Our aim is to develop the theory of discrete Fourier transforms (DFT) with parity and to unify Chowla’s problem and Maillet–Demyanenko determinants (CPMD) as different-looking expressions of the relative class number via the Dedekind determinant and the base change formula.
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І.І., Каліна. "МЕТОДОЛОГІЧНІ ПІДХОДИ ДО ФОРМУВАННЯ ДЕТЕРМІНАНТІВ РОЗВИТКУ ЦИФРОВІЗАЦІЇ УКРАІНИ." Economics and Management, no. 86(2) (May 22, 2020): 63–70. http://dx.doi.org/10.36919/2312-7812.2.2020.63.
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The article highlights the methodological approaches to the formation of determinants of digitalization of Ukraine, which include four main components: technology, communication, society and politics, economics. These determinants of the development of digitalization are closely related and for each domestic enterprise, they have different ways of using them. The main components consist of step systems, which, when used effectively, affect the digital development of both enterprises and the state as a whole. Determinant of development - technology consists of a seven-stage system: semantic (web), Big Data, Cloud Computing, augmented (augmented) reality, the Internet of Things, convenience and ease of use, visualization. Determinant of development - communication consists of an eight-level system: personalization of data, interaction and participation, mobility, «available around the clock», digital assistants, internationalization, culture and norms of behavior, media convergence. The determinant of development - society and politics consists of an eight-tier system: the need for security, protection of confidentiality, government regulation, transparency, integration of society into the network, demographic change, social inequality, archiving. Determinant of development the economy consists of a seven-tier system: global commerce, joint consumption, involvement of society in creative innovations, social cooperation, flexibility of activity in time and space, streamlining of work, lifelong learning. The economy is undergoing complex transformation processes, which are influenced by a number of determinants of digitalization. The purpose of the determinants of the development of
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Salihu, Armend, and Fahri Marevci. "Chio’s-like Method for Calculating the Rectangular (non-square) Determinants: Computer Algorithm Interpretation and Comparison." European Journal of Pure and Applied Mathematics 14, no. 2 (May 18, 2021): 431–50. http://dx.doi.org/10.29020/nybg.ejpam.v14i2.3920.
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In this paper, we present an approach for the calculation of rectangular determinants, where in addition to the mathematical formula, we also provide a computer algorithm for their calculation. Firstly, we present a method similar to Sarrus method for calculating the rectangular determinant of the order 2 × 3. Secondly, we present an approach for calculating the rectangular determinants of order m ×n by adding a row with all elements equal to one (1) in any row, as well as an application of Chio’s rule for calculating the rectangular determinants. Thirdly, we find the time complexity and comparison of the computer execution time of calculation of the rectangular determinant based on the presented algorithms and comparing them with the algorithm based on the Laplace method.
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Philippens, Nicole, Ester Janssen, Stef Kremers, and Rik Crutzen. "Determinants of natural adult sleep: An umbrella review." PLOS ONE 17, no. 11 (November 7, 2022): e0277323. http://dx.doi.org/10.1371/journal.pone.0277323.
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Background Sleep has a major impact on health, which makes it a relevant topic for research and health practitioners. Research on sleep determinants, i.e. factors that positively or negatively influence sleep, is fragmented. Objective The purpose of this umbrella review is to provide an overview of the current evidence on determinants of natural adult sleep. Methods A comprehensive literature search was performed on determinants of sleep. Reviews and meta-analyses on natural adult sleep were included. Six electronic databases (PubMed, WoS, Embase, CINAHL, PsycInfo and Cochrane) were used for the search, last accessed September 2021. The quality of the selected articles was assessed using the AMSTAR2 tool. Results were categorized in four main categories: biological, behavioral, environmental and personal/socio-economical determinants. Results In total 93 reviews and meta-analyses resulted in a total of 30 identified determinants. The impact of each determinant differs per individual and per situation. Each determinant was found to affect different sleep parameters and the relationship with sleep is influenced by both generic and specific moderators. Discussion A comprehensive overview on relevant sleep determinants provides a practical and scientifically based starting point to identify relevant intervention approaches to secure or improve individual sleep quality. The difference in aggregation level of the determinants and in measurement methods are the major limitations of this umbrella review. Extending existing generic sleep hygiene rules with an overview of all types of potential determinants will enhance the awareness of the complexity and can be used to improve the effect of sleep interventions in health promotion. Trial registration The umbrella review was registered with PROSPERO (registration ID CRD42020149648) https://www.google.com/search?client=firefox-b-d&q=CRD42020149648.
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Tinguha, Lovely, and Romario Ybanez. "Determinants of Investment Decisions among Retirables: Towards an Investment Planning Model." JPAIR Multidisciplinary Research 51, no. 1 (January 8, 2023): 88–108. http://dx.doi.org/10.7719/jpair.v51i1.218.
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This study is about the determinants of investment decisions among retirables to evaluate their preparedness of retirables in terms of investment before they retire, the perceived factors that influence them to invest, and their knowledge and education in financial management. It also creates an investment planning model that will fit the needs of the individual depending on their income and risk appetite to invest. The study uses a descriptive correlational method, and the results revealed no significant difference between the respondents according to the three determinants (Investment Behavior, Financial Preparedness, and Investment Influencers). Therefore, they do not differ in terms of determinants in making decisions. However, there was a significant relationship between investment determinants of retirables and investment influencers. The correlation of 0.864 between investment determinants and investment influencers for the retirables was highly correlated and statistically significant. The investment determinants influence investment decision-making; thus, it is claimed that determinant factors are extremely important to implement their investment plan for retirement preparedness. Consequently, knowing the investment determinant behavior is the key to practicing Investment planning. It is recommended, therefore, to strengthen the level of financial preparedness and education of employed people at an early age to raise awareness and improve their understanding of financial risks when they are no longer earning (retired) and make necessary investments.
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Tyumaseva, Zoya Ivanovna, Irina Leonidovna Orekhova, Elena Borisovna Bistray, Boris Alexandrovich Artemenko, and Elena Alexandrovna Chelnokova. "Determinants of students’ healthy lifestyle development." Samara Journal of Science 8, no. 1 (February 28, 2019): 307–13. http://dx.doi.org/10.17816/snv201981317.
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The paper focuses on the importance of a healthy lifestyle development among students, which is reflected in the Concept of Health System Development in the Russian Federation until 2020. The authors identify the determinants of a healthy lifestyle development, which include: spatial-environmental, motivational-reflexive, activity-methodical, tutor-project determinants. These determinants are interrelated; it provides an increase in the efficiency of a healthy lifestyle development among students. In the field of activity-methodical determinant the authors consider problems of practice-oriented training of teachers. The results of a survey among students and teachers show that students are not ready to accept the values of a healthy lifestyle while teachers are not ready to use health-saving technologies. In this regard, the authors have developed and tested a program for improving teachers qualifications in the field of health preservation, contributing to the development of skills to apply health saving technologies. The tutor-project determinant determines a functional field of the tutor in project activities of students aimed at health preservation.
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Xiao, Lin, Chuanmin Mi, Yetian Chen, and Lihua Huang. "Understanding the Determinants of Consumer Satisfaction With B&B Hotels." International Journal of Web Services Research 16, no. 4 (October 2019): 21–39. http://dx.doi.org/10.4018/ijwsr.2019100102.
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This study aims to understand the determinants of consumer satisfaction with bed-and-breakfast establishments (B&Bs) and build a hierarchical structure of these determinants. Content analysis was conducted based on the consumer online review data. Ten determinants of customer satisfaction were identified. The interpretive structural modeling (ISM) technique was then used to develop a five-level hierarchical structural model based on these determinants. Finally, the cross-impact matrix multiplication applied to the classification (MICMAC) technique was used to analyze the driver and dependence power for each determinant. This study has the potential to make significant contributions from both the theoretical and practical perspectives.
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Chen, Weisan, Christopher C. Norbury, Yunjung Cho, Jonathan W. Yewdell, and Jack R. Bennink. "Immunoproteasomes Shape Immunodominance Hierarchies of Antiviral Cd8+ T Cells at the Levels of T Cell Repertoire and Presentation of Viral Antigens." Journal of Experimental Medicine 193, no. 11 (June 4, 2001): 1319–26. http://dx.doi.org/10.1084/jem.193.11.1319.
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Vertebrates express three cytokine-inducible proteasome subunits that are incorporated in the place of their constitutively synthesized counterparts. There is increasing evidence that the set of peptides generated by proteasomes containing these subunits (immunoproteasomes) differs from that produced by standard proteasomes. In this study, we use mice lacking one of the immunoproteasome subunits (LMP2) to show that immunoproteasomes play an important role in establishing the immunodominance hierarchy of CD8+ T cells (TCD8+) responding to seven defined determinants in influenza virus. In LMP2−/− mice, responses to the two most dominant determinants drop precipitously, whereas responses to two subdominant determinants are greatly enhanced. Adoptive transfer experiments with naive normal and transgenic TCD8+ reveal that the reduced immunogenicity of one determinant (PA224–233) can be attributed to decreased generation by antigen presenting cells (APCs), whereas the other determinant (NP366–374) is less immunogenic due to alterations in the TCD8+ repertoire, and not, as reported previously, to the decreased capacity of LMP2−/− APCs to generate the determinant. The enhanced response to one of the subdominant determinants (PB1F262–70) correlates with increased generation by LMP2−/− virus–infected cells. These findings indicate that in addition to their effects on the presentation of foreign antigens, immunoproteasomes influence TCD8+ responses by modifying the repertoire of responding TCD8+.
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Goy, Taras. "Combinatorial Determinant Formulas for Boubaker Polynomials." Mathematical Problems in Engineering 2020 (January 13, 2020): 1–7. http://dx.doi.org/10.1155/2020/1528639.
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In this paper, we evaluate several families of Toeplitz–Hessenberg determinants whose entries are the Boubaker polynomials. Equivalently, these determinant formulas may be also rewritten as combinatorial identities involving sum of products of Boubaker polynomials and multinomial coefficients. We also present new formulas for Boubaker polynomials via recurrent three-diagonal determinants.
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Saadetoğlu, Müge, and Şakir Mehmet Dinsev. "Inverses and Determinants of n × n Block Matrices." Mathematics 11, no. 17 (September 3, 2023): 3784. http://dx.doi.org/10.3390/math11173784.
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Block matrices play an important role in all branches of pure and applied mathematics. In this paper, we study the two fundamental concepts: inverses and determinants of general n×n block matrices. In the first part, the inverses of 2×2 block matrices are given, where one of the blocks is a non-singular matrix, a result which can be generalised to a block matrix of any size, by splitting it into four blocks. The second part focuses on the determinants, which is covered in two different methods. In the first approach, we revise a formula for the determinant of a block matrix A, with blocks elements of R; a commutative subring of Mn×n(F). The determinants of tensor products of two matrices are also given in this part. In the second method for computing the determinant, we give the general formula, which would work for any block matrix, regardless of the ring or the field under consideration. The individual formulas for determinants of 2×2 and 3×3 block matrices are also produced here.
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O'Toole, M. M., G. C. Bosma, and M. J. Bosma. "Expression of murine Lm-1 locus. Lm-1 determinants on lymphocytes and macrophages, and effects of Lm-1 incompatibility on bone marrow grafts." Journal of Experimental Medicine 162, no. 2 (August 1, 1985): 607–24. http://dx.doi.org/10.1084/jem.162.2.607.
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Lm-1 is an Igh-linked locus that codes for cell surface alloantigens (Lm-1 determinants) recognized by T lymphocytes. Using Lm-1 congenic strains and cold-target inhibition of anti-Lm-1-specific lysis by cytotoxic T lymphocytes, we were able to demonstrate differential expression of two distinct Lm-1 antigenic determinants. One determinant is expressed on the surface of T cell blasts, the other on a number of pre-B cell lines. Both determinants are present on B cell blasts. Macrophages also bear Lm-1 determinants, and possibly express a determinant not found on lymphocytes. Fibroblasts, (unstimulated) thymocytes, and immature T cells lack detectable Lm-1 determinants. These data indicate that expression of the Lm-1 locus is dependent on cell lineage and the stage of cell differentiation or activation. We propose that Lm-1 is a lymphocyte-macrophage differentiation locus containing a number of structurally and functionally related genes. Evidence was presented that Lm-1 may also serve as a histocompatibility locus of major importance for bone marrow transplantation. Specifically, when Lm-1-incompatible bone marrow cells and spleen cells (from normal or anti-Lm-1 immune mice) were transplanted into X-irradiated recipients, the maturation and/or function of bone marrow-derived donor B cells was delayed or inhibited.
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Ozili, Peterson K. "Banking stability determinants in Africa." International Journal of Managerial Finance 14, no. 4 (August 6, 2018): 462–83. http://dx.doi.org/10.1108/ijmf-01-2018-0007.
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Purpose The purpose of this paper is to investigate the determinants of banking stability in Africa. Design/methodology/approach The authors present four measures of banking stability embedding banks’ loan loss coverage ratio, insolvency risk, asset quality ratio, and level of financial development, thereby allowing analysis of banking stability determinants from four complementary perspectives: protection for downside credit losses, distress arising from insolvency risk, non-performing loans, and financial development. The authors use the regression methodology to estimate the impact of financial structure, institutional, bank-level factors on bank stability. Findings The findings indicate that banking efficiency, foreign bank presence, banking concentration, size of banking sector, government effectiveness, political stability, regulatory quality, investor protection, corruption control and unemployment levels are significant determinant of banking stability in Africa and the significance of each determinant depends on the banking stability proxy employed and depends on the period of analysis: pre-crisis, during-crisis or post-crisis. Practical implications Banking supervisors in African countries should consider the role of financial structure and institutional quality for banking stability in the African region. Originality/value This study is the first to examine banking stability determinants in Africa that takes into account institutional quality and financial structure.
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Homer, R. J., and D. B. Murphy. "Qc-1, a novel Q-region-controlled CTL determinant expressed on B lymphocytes." Journal of Immunology 138, no. 12 (June 15, 1987): 4322–28. http://dx.doi.org/10.4049/jimmunol.138.12.4322.
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Abstract Using cloned cytotoxic T lymphocytes (CTL), we have identified a Q region controlled determinant with a unique strain and tissue distribution. Several strains that express the classically defined Qa-2 determinant and other Q region controlled determinants do not express the CTL determinant. In addition, strain BALB/cByJ, which does not normally express any Q region controlled cell surface determinant, expresses this new determinant. Cross-reactivity between the Q region controlled CTL determinant and a Kk region controlled class I product (probably H-2Kk) was observed. Finally, among lymphocytes, the CTL determinant is expressed preferentially (if not exclusively) on B cells, thus distinguishing it from all previously described Q region controlled determinants, which are expressed predominantly on T cells. We provisionally designate this novel Q region controlled CTL determinant Qc-1. The possibility that Qc-1 is recognized together with a self antigen is discussed.
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Simitsek, P. D., D. G. Campbell, A. Lanzavecchia, N. Fairweather, and C. Watts. "Modulation of antigen processing by bound antibodies can boost or suppress class II major histocompatibility complex presentation of different T cell determinants." Journal of Experimental Medicine 181, no. 6 (June 1, 1995): 1957–63. http://dx.doi.org/10.1084/jem.181.6.1957.
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Bound antibodies can modulate antigen processing but it is not clear to what extent this affects antigen presentation. Here we show that presentation of T cell determinants in tetanus toxin can be either enhanced or suppressed as a direct consequence of antibody modulation of antigen processing in human B lymphoblastoid cells. Remarkably, a single bound antibody or its Fab fragment can simultaneously enhance the presentation of one T cell determinant by more than 10-fold while strongly suppressing the presentation of a different T cell determinant. Biochemical analysis demonstrates that both the suppressed and boosted determinants fall within an extended domain of antigen stabilized or "footprinted" by this antibody during proteolysis. These results demonstrate that bound antibodies can modulate the capture of peptides by class II major histocompatibility complex (MHC), thus manipulating the T cell response towards or away from particular determinants. Altered processing of protein-protein complexes leading to enhanced loading of class II MHC and substantially lowered threshold for T cell activation suggests a novel mechanism that might reveal "cryptic" self determinants.
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Schiltz, Nicholas K., Kevin Chagin, and Ashwini R. Sehgal. "Clustering of Social Determinants of Health Among Patients." Journal of Primary Care & Community Health 13 (January 2022): 215013192211135. http://dx.doi.org/10.1177/21501319221113543.
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Introduction/Objectives: Many health systems screen patients for social determinants of health and refer patients with social needs to community organizations for assistance. Understanding how social determinants cluster together may help guide assistance programs. Methods: This study examined patients screened by The MetroHealth System in Cleveland, Ohio for 9 social determinants, including food insecurity, financial strain, transportation limitations, inability to pay for housing or utilities, intimate partner violence, social isolation, infrequent physical activity, daily stress, and lack of internet access. Clustering analyses were performed to determine which combination of social determinants occurred together more often than would be expected if each determinant were independent of each other. Results: Among 23 161 screened patients, there were 19 dyads, 13 triads, and one tetrad of social determinants that clustered together. The most prevalent triad of food insecurity, social isolation, and inability to pay for housing or utilities occurred among 1095 patients but would be expected to occur among 284 patients, for an observed/expected ratio of 3.85 (95% confidence interval 3.64-4.07). In multivariate analyses, younger, Black, and lower income patients were 2 to 3 times more likely to have this triad compared to older, White, and wealthier patients. Conclusions: Social determinants of health frequently cluster together, and such clustering is associated with patient demographic characteristics. Further work is needed to determine how social determinant clusters impact health and cost outcomes and to develop programs that can address multiple co-existing social needs.
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Paudel, Bishnu, and Chris Pinner. "The group determinants for ℤ_n × H." Notes on Number Theory and Discrete Mathematics 29, no. 3 (August 2023): 603–19. http://dx.doi.org/10.7546/nntdm.2023.29.3.603-619.
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Let $\mathbb Z_n$ denote the cyclic group of order $n$. We show how the group determinant for $G= \mathbb Z_n \times H$ can be simply written in terms of the group determinant for $H$. We use this to get a complete description of the integer group determinants for $\mathbb Z_2 \times D_8$ where $D_8$ is the dihedral group of order $8$, and $\mathbb Z_2 \times Q_8$ where $Q_8$ is the quaternion group of order $8$.
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Saxena, Mayank, and Sumeet Maru. "TO STUDY THE IMPACT OF DETERMINANTS OF GROWTH ON FIRM’S PERFORMANCE WITH RESPECT TO IT INDUSTRY." International Journal of Research -GRANTHAALAYAH 4, no. 1 (January 31, 2016): 108–18. http://dx.doi.org/10.29121/granthaalayah.v4.i1.2016.2848.
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Firm growth is an important indicator of a thriving economy. Although the determinants of firm growth have been studied in various disciplines, an integrated analysis is still lacking. Many determinants of firm growth are summarized and classified into three dimensions: individual, organizational, and environmental determinants. The present paper attempts to provide an integrated analysis on the determinants of firm growth. It gives an opportunity to investigate the determinants of firm growth in a comprehensive way.
The close-ended questionnaire was developed from standard questions of relevant literature as a research instrument. The sample size taken for the research is of 110 IT firms entrepreneurs.
Among the individual determinants, need for achievement, risk taking propensity and self-efficacy are positively conducive to firm growth. Among the organizational determinants, formulation, preparedness to grow, organizational learning, financial performance have positive impacts on firm growth. Market orientation, Entrepreneurial orientation, competitive intensity shows a negative relationship. Among the Entrepreneurial determinants, munificence, heterogeneity has positive impacts on firm growth. Market dynamism shows a negative relationship. Growth Barriers shows negative relationship.
Our study shows that firm growth is a complex phenomenon. It cannot be explained by one particular dimension or one determinant. The most important determinants have been identified from the individual, environmental and organizational dimensions. Organizational determinants have the greatest influence on firm growth.
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Balonin, Nikolay, Mikhail Sergeev, and Anton Vostrikov. "Prime Fermat numbers and maximum determinant matrix conjecture." Information and Control Systems, no. 2 (April 20, 2020): 2–9. http://dx.doi.org/10.31799/1684-8853-2020-2-2-9.
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Purpose: Solution to the problem of optimizing the determinants of matrices with a modulus of entries < 1. Developing a theory of such matrices based on preliminary research results. Methods: Extreme solutions (in terms of the determinant) are found by minimizing the absolute values of orthogonal matrix elements, and their subsequent classification. Results: Matrices of orders equal to prime Fermat numbers have been found. They are special, as their absolute determinant maximums can be reached on a simple structure. We provide a precise evaluation of the determinant maximum for these matrices and formulate a conjecture about it. We discuss the close relation between the solutions of extremal problems with the limitation on the matrix column orthogonality and without it. It has been shown that relative maximums of orthogonality-limited matrix determinants correspond to absolute maximums of orthogonality-unlimited matrix determinants. We also discuss the ways to build extremal matrix families for the orders equal to Mersenne numbers. Practical relevance: Maximum determinant matrices are used extensively in the problems of error-free coding, compression and masking of video information. Programs for maximum determinant matrix search and a library of constructed matrices are used in the mathematical network “mathscinet.ru” along with executable online algorithms.
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Ahmed, Ali A. M., and K. L. Bondar. "A modern condensation method to compute the determinants of n×n matrices." International Journal of Algebra and Statistics 5, no. 2 (September 2, 2016): 90. http://dx.doi.org/10.20454/ijas.2016.1112.
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In this paper we present a modern condensation method to compute the determinants of n×n matrices. This condensation method is a method for evaluating an n×n determinant in term of determinants of size (n- 1)×(n -1) , and then expresses the latter in terms of determinants of size (n- 2)×(n -2), and so on. The difference between Chio's method and this method is that the Chio's method repeats one row and one column with the remaining rows and columns while this method repeats only one row or one column.
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T.Ragunathan. "Numerous Determinants Identities Involving Jacobsthal and Jacobsthal Lucas Numbers." Communications on Applied Nonlinear Analysis 31, no. 5s (July 17, 2024): 289–95. http://dx.doi.org/10.52783/cana.v31.1037.
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Determinants have played an important role in many areas of mathematics. As an example, they are extremely useful in the research and resolution of linear equation and system problems. The study of determinants can be approached from several distinct angles. Throughout the course of this inquiry, we discover a large number of determinant identities involving Jacobsthal and Lucas numbers.
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Oltramare, Christelle, Zakia Mediouni, Yara Shoman, Nancy B. Hopf, Halshka Graczyk, and Aurélie Berthet. "Determinants of Pesticide Exposure in Occupational Studies: A Meta-Analysis." Toxics 11, no. 7 (July 18, 2023): 623. http://dx.doi.org/10.3390/toxics11070623.
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Few epidemiological studies use exposure determinants specifically tailored to assess pesticide or plant protection product (PPP) exposures when assessing presumed association between occupational exposure and health outcomes among agricultural workers. This lack of exposure specificity could lead to results that fail to detect an association. It could be related to the lack of consensus on exposure assessment methods and the choice of exposure determinants. We conducted a meta-analysis following the PRISMA checklist to identify PPP exposure determinants used in occupational studies and identified exposure determinants that best characterized agricultural exposures to PPPs. Out of 1436 studies identified, 71 were included. The exposure determinants identified were active ingredients, chemical classes, types of PPP, crops, tasks, frequencies, duration, lifetime exposure days, and intensity-weighted exposure days. Only six over 17 associations between exposure determinants and health outcomes were found with moderate quality of evidence. Overall, epidemiological studies had difficulty defining relevant determinants to characterize PPP exposures for agricultural workers. We recommend that a standardized list of determinants for PPP exposures in occupational exposure studies should include information on formulations, intensity, duration, and frequency of PPP exposure. Harmonized data collection on exposure and health outcomes are required as well as standard units for each exposure determinant.
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Gómez-Ariza, Carlos J., M. Teresa Bajo, M. Carmen Puerta-Melguizo, and Pedro Macizo. "Determinantes de la representación musical Determinants of musical representation." Cognitiva 12, no. 1 (February 1, 2000): 89–110. http://dx.doi.org/10.1174/021435500760374021.
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Qi, Feng, Omran Kouba, and Issam Kaddoura. "Computation of several Hessenberg determinants." Mathematica Slovaca 70, no. 6 (December 16, 2020): 1521–37. http://dx.doi.org/10.1515/ms-2017-0445.
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AbstractIn the paper, employing methods and techniques in analysis and linear algebra, the authors find a simple formula for computing an interesting Hessenberg determinant whose elements are products of binomial coefficients and falling factorials, derive explicit formulas for computing some special Hessenberg and tridiagonal determinants, and alternatively and simply recover some known results.
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Seeholzer, Eileen L., Marielee Santiago, Charles Thomas, Monica DeAngelis, Francesca Scarl, Anastasia Webb, Tangela Woods, and Ashwini R. Sehgal. "Prevalence of Social Determinants of Health Among Health System Employees." Journal of Primary Care & Community Health 13 (January 2022): 215013192211139. http://dx.doi.org/10.1177/21501319221113956.
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Introduction/Objectives: Many health systems screen patients for social determinants of health and refer patients with social needs to community service organizations for assistance. However, little is known about social determinants of health among health system employees. We sought to examine the prevalence of social determinants among employees of The MetroHealth System, a large safety-net health system in Cleveland, Ohio. Methods: We invited participants in an employee wellness program to answer the same screening questions that patients answer about 9 social determinants of health, including food insecurity, financial strain, transportation difficulty, inability to pay for housing or utilities, intimate partner violence, social isolation, infrequent physical activity, daily stress, and lack of internet access. We then determined the percentage of employees who met pre-defined criteria for being at risk for each social determinant. We also examined how these percentages varied across employee job categories. Results: Of 4191 full-time employees, 1932 (46%) completed the survey. The percentage of employees at risk for each social determinant were: food insecurity (11%), financial strain (12%), transportation difficulty (4%), inability to pay for housing or utilities (10%), intimate partner violence (4%), social isolation (48%), infrequent physical activity (10%), daily stress (58%), and lack of internet access (3%). Being at risk for specific social determinants was more common among support staff compared to staff physicians and nurses. For example, the survey participants included 436 administrative support staff, a job category that includes secretaries and patient service representatives. Among this group, 20% reported food insecurity, 20% financial strain, and 17% inability to pay for housing or utilities. Conclusions: Social determinants of health are common among health system employees, especially among workers in lower paid job categories. Health systems should routinely screen employees for social determinants and adjust salaries, benefits, and assistance programs to address their social needs.