Here, an epidemiological model considering pro and anti-vaccination groups is proposed and analyzed. In this model, susceptible individuals can migrate between these two groups due to the influence of false and true news about safety and efficacy of vaccines. From this model, written as a set of three ordinary differential equations, analytical expressions for the disease-free steady state, the endemic steady state, and the basic reproduction number are derived. It is analytically shown that low vaccination rate and no influx to (...) the pro-vaccination group have similar impacts on the long-term amount of infected individuals. Numerical simulations are performed with parameter values of the COVID-19 pandemic to illustrate the analytical results. The possible relevance of this work is discussed from a public health perspective. (shrink)

Is 'n transendentale kritiek religieus bepaald? deur V. Brümmer. -- Constitution and creativity in the philosophy of Edmund Husserl, by A. L. Conradie. -- Studium Generale, deur H. J. De Vleeschauwer. -- Sociology of law and its philosophical foundtions, by H. Dooyeweerd. -- Beginvrae en antwoorde in der Wysbegeerte, deur P. G. W. Du Plesis. -- Max Scheler's concern with the highest perfection, by S. I. M. Du Plessis. -- Christelike wetenskap, highest perfection, by S. I. M. Deu Plessis. -- (...) Christelike wetenskap, deur B. Duvenage. -- Malan's critical study, by H. Hart. -- Raakpunte vir 'n dialoog met 'n Christelike Wysbegeerte, deur A. M. T. Meyer. -- Nuwe gedagtes oor die begrip Natuurwet, deur A. H. Murray. -- Die voorwaardes vir die uitbou van 'n wysgerige antropologie, deur C. K. Oberholzer. -- De structuur van feit-en-betekenis, deur K. J. Popma. -- The relation of the arts to the presentation of the truth, by C. G. Seerveld. -- Gezag en vrijheid in het licht van Gods Woord, deur J. Stellingwerff. -- Voorveronderstellings vir 'n filosogie van die opvoeding, deur J. A. L. Taljaard. -- Objektiwiteit, sekularisasie en geskiedenis, deur N. T. Van der Merwe. -- Etiek: wetenskap van relasies, deur S. P. Van der Walt. -- Wetten en feiten, deur C. A. Van Peursen. -- Enige opmerkingen over entiteiten, deur H. Van Riessen. -- Richard Kroner on Herman Dooyeweerd, by C. Van Til. -- De mens in de taalkunde, deur P. A. Verburg, -- Enkele motieven van het anti-militair pacifisme, deur S, U. Zuidema. -- Publications of prof. dr. H. G. Stoker. Publikasies van prof. dr. H. G. Stoker (p. 303-311). (shrink)

Bruening describes his book as "an attempt to capture the spirit of the man—not his works and his life considered in isolation from each other, but the person himself as one single human being." For the most part, however, life and works are separately presented, most of the biographical data being concentrated in the first chapter. Thereafter the works are treated one by one, in largely chronological order: "Notes on Logic" ; "Notes Dictated to Moore" ; Notebooks ; Prototractatus ; (...) Tractatus ; "Lecture on Ethics" ; Blue Book ; Brown Book ; Philosophical Investigations ; Philosophische Bemerkungen ; Philosophical Grammar ; Remarks on the Foundations of Mathematics ; Lectures and Conversations on Aesthetics, Psychology and Religious Belief ; Zettel ; On Certainty. Bruening does not explain his principles of selection. The direction of his interests is suggested by the ten pages on Lectures and Conversations, not written by Wittgenstein, as compared to the mere half page devoted to On Certainty, or by the four pages on a popular lecture on ethics as compared to the single page on Philosophische Bemerkungen. Longer treatments follow the course of the work being glossed and sample its topics, save in the case of the Investigations, where remarks are grouped under these five headings: "Reflections on the Tractatus," "Language Games and Forms of Life," "The Mind-Body Problem and Private Language," "The Nature of Philosophy," and "Seeing and Seeing As." Doubtless beginning readers such as Bruening usually has in view would have found more profit and interest in the coherent development of such themes than in running comments on work after work, especially if they had been shown inside Wittgenstein’s problems and been made to sense the struggle. This seldom happens, however, and the inaccuracies are numerous and sometimes serious. A select bibliography is appended.—G.L.H. (shrink)

This paper presents research regarding the monitoring of the brain and the adequacy of anesthesia during surgery. Particular variables are derived from EEG and ECG signals and are correlated to anesthetic gas (sevoflurane) concentration, in pediatric anesthesia. The methods used for parameter extraction are based on change detection theory and time-frequency representation. Preliminary results show that the expired anesthetic gas concentration modulates both the heart rate variability and the duration of the burst suppression. Monitors of the central nervous system and (...) autonomic nervous system activities can be expected to be based on these variables. (shrink)

An seine Freunde - wer da Zeugnisse dessen, was wir Freundschaft nennen, erwartet, wird sich ein wenig enttäuscht finden. Abgesehen von den Briefen an seine Gattin Terentia und seine Freigelassenen Tiro, die eine Sonderstellung einnehmen, gibt sich Cicero nur einigen wenigen Partnern gegenüber ganz so, wie er ist, und das ist doch das, was wir bei einem Freund voraussetzen: Unbefangenheit und Unverstelltheit. Die große Masse seiner Briefe ist zweckgebunden, trägt mehr oder weniger formellen Charakter. Da gilt es, das eigene politische (...) Handeln zu rechtfertigen, das persönliche Verdienst ins rechte Licht zu rücken, Differenzen mit politischen "Freunden" auszufechten, Beziehungen für sich und andere auszuwerten, den politischen Gesinnungsgenossen bei der Stange zu halten oder zu fördern und was dergleichen mehr ist. So leuchten diese Briefe tief hinein in das Treiben der führenden Kreise und bergen mit ihren Schlaglichtern auf das politische Geschehen der Zeit eine Fülle von Interessantem und Fesselndem. Ganz von der Politik diktiert ist der Briefwechsel mit L. Plancus, M. Lepidus, D. Brutus und C. Cassius in den Büchern X, XI und XII. Er bildet eine unschätzbare Quelle für unsere Kenntnis der Vorgänge während des Todeskampfes der Republik. (shrink)

The aim of this paper is to defend a famous quotation from Martin Luther King, stating that “The arc of the moral universe is long, but it bends toward justice.” The quotation is inscribed on the King Memorial in Washington, D.C. and President Obama had it woven into a rug for the Oval Office in the White House. The quotation has become something of a contemporary proverb, and is certainly worthy of our close attention. In order to evaluate the dictum, (...) questions concerning its meaning will first be addressed and clarified, and various possible misinterpretations will be set aside. It will be argued that the appeal, and an effective defense of this moral claim, depend upon the pre-existing values of the people to whom the claim is addressed. The dictum is clearly intended to support hopes of social change and to encourage support for ideals of racial equality, but we want to know whether it is true or false and exactly what it means. King’s dictum can easily be taken as involving a doctrine of “divine Providence” or “historical inevitability.” But many are skeptical of these ideas and hold that we cannot be sure that the future will eventuate in desired moral outcomes. But, if so, what would it possibly mean to claim that the “moral universe” or the human world “bends toward justice”? On the other hand, holding that the moral universe “bends toward justice” claims more than saying that we can now act or organize to support justice; instead, it tells us that there is some pre-existing support for our related activities. What, then, is this pre-existing bend of the moral universe? (shrink)