Campylobacteriosis Transmission Dynamics In Humans: Modeling The Effects Of Public Health Education, Treatment, And Sanitation,
2021
University of Dar-es-Salaam
Campylobacteriosis Transmission Dynamics In Humans: Modeling The Effects Of Public Health Education, Treatment, And Sanitation, Furaha Chuma, Zubeda Mussa
Tanzania Journal of Science
An epidemic model for the dynamics of campylobacteriosis disease with public health education, treatment, and sanitation control strategies was formulated and analyzed. The stabilities of the equilibrium points were analyzed by using the Routh-Hurwitz criterion. The effective reproduction number was computed by using the Next Generation Matrix method. Numerical simulations were carried out and the results showed that, public health education has a substantial influence on the reduction of the effective reproduction number. Moreover, treatment and sanitation control strategies have also shown significant reduction of infected individuals from the respective population.Keywords: Campylobacteriosis; public health education; treatment; sanitation.
Application Of Guided Local Search (Gls) In Portfolio Optimization,
2021
University of Dar es Salaam, College of Information and Communication Technology, Department of Electronics and Telecommunications, P. O. Box 33335, Dar es Salaam, Tanzania.
Application Of Guided Local Search (Gls) In Portfolio Optimization, Collether John
Tanzania Journal of Science
Portfolio optimization is a major activity in any operating business. Conventional portfolio optimization research makes simplifying assumptions; for example, they assume no constraint in how many assets one holds (cardinality constraint). They also assume no minimum and maximum holding sizes (holding size constraint). Once these assumptions are relaxed, conventional methods become inapplicable, and hence new methods are needed to tackle this challenge. Threshold Accepting is an established algorithm in the extended portfolio optimization problem. In this paper, an algorithm called Guided Local Search (GLS) is applied using an accurate and efficient designed hill climbing algorithm, named HC-C-R. GLS sitting on …
A Model For Mapping Combined Effects Of Quality Of Service Parameters And Device Features On Video Streaming Quality Of Experience,
2021
University of Dar es Salaam
A Model For Mapping Combined Effects Of Quality Of Service Parameters And Device Features On Video Streaming Quality Of Experience, Beatrice Buberwa, Mercy Mbise
Tanzania Journal of Science
Maintaining quality of streaming video is challenged by network faults resulting into freezes and rebufferings on the video. On top of the network effects, device features have impacts on the image of the video frames displayed during streaming. Despite the simultaneous impacts of video quality from network and device, previous studies considered individual impact of network parameters or devices as influencing factors to propose Quality of Experience (QoE) models. This study proposed QoE model by mapping combined effects from both network and device on video streamed QoE. An experiment to study the effects of video quality from combined effects of …
Analysis Of Repeated Milk Yields And Composition Traits By Mixed Models For Crossbred Holstein Friesian Dairy Cows,
2021
University of Dar es Salaam
Analysis Of Repeated Milk Yields And Composition Traits By Mixed Models For Crossbred Holstein Friesian Dairy Cows, Ewonetu Senbeta, Kefelegn Kefenie, Adane Abebe
Tanzania Journal of Science
This study evaluated the effects of milking month, milking time, and lactation stage on milk yield and composition traits of crossbred dairy cows. Twelve crossbred Holstein Friesian cows with the same parity were purposefully selected and categorized into three groups; each consisting of four. All cows were individually managed for 120 days. Milk yield record was done every day for the morning and evening time whereas milk samples were taken every fifteen-day intervals. Data collected were analysed by PROC MIXED procedure of SAS 9.4. The “morning milkings” in all milking months showed the highest variations for “milk yield” whereas the …
Mobile Pedestrian Navigation Framework For Multi-Factors Resources Allocation,
2021
University of Dar es Salaam
Mobile Pedestrian Navigation Framework For Multi-Factors Resources Allocation, Joseph Mushi, Baraka Jungwa
Tanzania Journal of Science
Although it is possible for pedestrian to walk to unfamiliar places, familiarizing and finding a way out of new environments is quite challenging unless a pedestrian navigation system (PNS) is used. Most existing PNS solutions are employing vehicle navigation framework, however, such systems are designed to work efficiently for vehicular systems and not suitable for finding shortest path in environment with poor geospatial mapping. This study designed pedestrian navigation framework for PNS that supports resource allocations in environment with poor geospatial mapping. Mixtures of qualitative and quantitative methods have been used to interview prospective users for requirement specifications and experimental …
Quantum Theories Associated To Increasing Hilbert Space Filtrations And Generalized Jacobi 3–Diagonal Relation,
2021
Università di Roma "Tor Vergata," via Columbia, 2, 00133 Roma, Italy
Quantum Theories Associated To Increasing Hilbert Space Filtrations And Generalized Jacobi 3–Diagonal Relation, Luigi Accardi, Yun Gang Lu
Journal of Stochastic Analysis
No abstract provided.
Rate Of Convergence In The Central Limit Theorem For Iid Pareto Variables,
2021
Hochschule RheinMain, 65022 Wiesbaden, Germany
Rate Of Convergence In The Central Limit Theorem For Iid Pareto Variables, Claas Becker, Manuel Bohnet, Sarah Kummert
Journal of Stochastic Analysis
No abstract provided.
The Integer-Antimagic Spectra Of Graphs With A Chord,
2021
San Jose State University
The Integer-Antimagic Spectra Of Graphs With A Chord, Richard M. Low, Dan Roberts, Jinze Zheng
Theory & Applications of Graphs
Let Α be a nontrival abelian group. A connected simple graph G = (V, E) is Α-antimagic if there exists an edge labeling f: E(G) → A \ {0} such that the induced vertex labeling f+: V(G) → Α, defined by f+(v) = Σ{uv ∈ E(G) f(uv), is injective. The integer-antimagic spectrum of a graph G is the set IAM(G) = {k |G is {Ζ}k-antimagic} and k ≥2. In this paper, we determine the integer-antimagic spectra for cycles with a chord, paths with a chord, and wheels with a chord.
Effects Of Creative Play Activities On Early Mathematics Performance Among Preschoolers,
2021
Universiti Malaya
Effects Of Creative Play Activities On Early Mathematics Performance Among Preschoolers, Chong Chai Fung
Student Works (2020-2029)
The purpose of this study was to examine the effects of creative play activities on early mathematics performance among preschool children’s number operations in addition and subtraction skills. The sample consisted of 60 six years old children from two different Sekolah Kebangsaan preschools who were selected to participate in this study. 30 children from Preschool A were placed in the Experimental group and 30 children from Preschool B were placed in the Control group. The research instruments consisted pre-test and post-test addition and subtraction questions, 10 lessons of creative play activities on early mathematics in addition and subtraction games for …
Modeling The Effect Of Lockdown Timing As A Covid‑19 Control Measure In Countries With Differing Social Contacts,
2021
The University of Texas Rio Grande Valley
Modeling The Effect Of Lockdown Timing As A Covid‑19 Control Measure In Countries With Differing Social Contacts, Tamer Oraby, Michael G. Tyshenko, Jose Campo Maldonado, Kristina Vatcheva, Susie Elsaadany, Walid Q. Alali, Joseph C. Longenecker, Mustafa Al‑Zoughool
School of Mathematical & Statistical Sciences Faculty Publications
The application, timing, and duration of lockdown strategies during a pandemic remain poorly quantified with regards to expected public health outcomes. Previous projection models have reached conflicting conclusions about the effect of complete lockdowns on COVID-19 outcomes. We developed a stochastic continuous-time Markov chain (CTMC) model with eight states including the environment (SEAMHQRD-V), and derived a formula for the basic reproduction number, R0, for that model. Applying the R 0 formula as a function in previously-published social contact matrices from 152 countries, we produced the distribution and four categories of possible R 0 for the 152 countries and chose one …
Noncentral Limit Theorem For Large Wishart Matrices With Hermite Entries,
2021
CNRS, Université de Lille, Laboratoire Paul Painlevé UMR 8524, F-59655 Villeneuve d’Ascq, France
Noncentral Limit Theorem For Large Wishart Matrices With Hermite Entries, Charles-Philippe Diez, Ciprian A. Tudor
Journal of Stochastic Analysis
No abstract provided.
Symbolic Rees Algebras,
2021
University of California, Riverside
Symbolic Rees Algebras, Eloísa Grifo, Alexandra Seceleanu
Department of Mathematics: Faculty Publications
We survey old and new approaches to the study of symbolic powers of ideals. Our focus is on the symbolic Rees algebra of an ideal, viewed both as a tool to investigate its symbolic powers and as a source of challenging problems in its own right. We provide an invitation to this area of investigation by stating several open questions.
Euler In Wartime: Publishing In The Seven Years' War,
2021
University of Washington, Tacoma
Euler In Wartime: Publishing In The Seven Years' War, Erik R. Tou
Euleriana
At the outbreak of the Seven Years' War in 1756, Leonhard Euler (1707-1783) was a successful and prolific scholar at the Berlin Academy of Sciences, well on his way to producing many significant contributions to 18th century science and mathematics. However, once the war began his opportunities were sharply curtailed. Most of the war did not go well for Prussia, and Euler's place in the midst of this conflict limited his ability to publish his work. With the Euler Archive available online, Gustaf Eneström's index may be analyzed more deeply to uncover the effects of the conflict on Euler's life …
Euler Archive Spotlight,
2021
Pittsburg State University
Euler Archive Spotlight, Cynthia J. Huffman Ph.D.
Euleriana
A spotlight on the Euler Archive, including recent translations.
Euler’S Theories Of Musical Tuning With An English Translation Of Du Véritable Caractère De La Musique Moderne,
2021
Plymouth State University
Euler’S Theories Of Musical Tuning With An English Translation Of Du Véritable Caractère De La Musique Moderne, Larry G. Blaine, Susan Ferré
Euleriana
Du Véritable Caractère de la Musique Moderne (E315), a work almost unknown to musical scholars, is an extremely interesting document in the history of tuning systems. A tuning system is simply an arrangement of sound frequencies for use in music. A just tuning is an arrangement in which the ratios of these frequencies are all ratios of whole numbers- preferably small ones. Classically, these ratios involve only factors of 2, 3, and 5. In particular, a very fundamental chord in music of many genres, the so-called major triad, Has frequency ratios 4:5:6. Euler proposes introducing the prime 7, …
Principles For Determining The Motion Of Blood Through Arteries,
2021
University of Sao Paulo
Principles For Determining The Motion Of Blood Through Arteries, Sylvio R. Bistafa
Euleriana
Translation of Principia pro motu sanguinis per arterias determinando (E855). This work of 1775 by L. Euler is considered to be the first mathematical treatment of circulatory physiology and hemodynamics.
Euler, Father Of Haemodynamics,
2021
University of Sao Paulo
Euler, Father Of Haemodynamics, Sylvio R. Bistafa
Euleriana
This article is being published in conjunction with the translation and synopsis of E855. Principia pro motu sanguinis per arterias determinando of 1775 - view the translation and synopsis by clicking here.
A History And Translation Of Lagrange's "Sur Quelques Problèmes De L'Analyse De Diophante'',
2021
University of the Pacific
A History And Translation Of Lagrange's "Sur Quelques Problèmes De L'Analyse De Diophante'', Christopher Goff, Michael Saclolo
Euleriana
Among Lagrange's many achievements in number theory is a solution to the problem posed and solved by Fermat of finding a right triangle whose legs sum to a perfect square and whose hypotenuse is also a square. This article chronicles various appearances of the problem, including multiple solutions by Euler, all of which inadequately address completeness and minimality of solutions. Finally, we summarize and translate Lagrange's paper in which he solves the problem completely, thus successfully proving the minimality of Fermat's original solution.
On The Surface Area Of Scalene Cones And Other Conical Bodies,
2021
Northern Kentucky University
On The Surface Area Of Scalene Cones And Other Conical Bodies, Daniel J. Curtin
Euleriana
This paper first appeared in the Novi Commentarii academiae scientiarum Petropolitanae vol. 1, 1750, pp. 3-19 and is reprinted in the Opera Omnia: Series 1, Volume 27, pp. 181–199. Its Eneström number is E133. This translation and the Latin original are available from the Euler Archive.
The Surface Area Of A Scalene Cone As Solved By Varignon, Leibniz, And Euler,
2021
Northern Kentucky University
The Surface Area Of A Scalene Cone As Solved By Varignon, Leibniz, And Euler, Daniel J. Curtin
Euleriana
In a 1727 mathematical compendium, Pierre Varignon (1654-1722) published his solution to the problem of finding the surface area of a scalene (oblique) cone, one whose base is circular but whose vertex is off-center. The article after Varignon's in that publication was by Gottfried Leibniz (1646-1716), who proposed improvements and even extended the solution to a base with any curve. When Leonhard Euler (1707-1783) published on the subject [E133] in 1750, he gently pointed out an error in Leibniz's solution, which he corrected, after extending Varignon's solution in the case of circular base. Euler then used Leibniz's approach to solve …
