The Croonian Lecture, 1965 - The organization of a memory system

The study of memory is unfortunately a difficult and confused subject. Its importance is beyond question, if only because memory lies near the centre of human abilities. Yet there is little agreement even as to the practical results, if any, that may be expected from its study. Education and psychology proceed empirically for want of a general theory of memory, but it is not clear whether such a theory may be expected to come from psychology as studied in man, from experimental study of animals, or from some discoveries of logic, mathematics or engineering. Yet the subject has certainly not been neglected. Immense efforts have been made by psychologists, clinicians, physiologists and workers in other disciplines. In recent years occurrences of various sorts have been reported in the nervous system during learning, from electrical changes, to changes in the base composition of the ribosenucleotides of single nerve cells. In fact there is such a large literature that one cannot avoid feeling that anything that an anatomist may say on the subject will be irrelevant, superficial, naive or worst of all, confusing. I am encouraged to take the risk by the fact that study of the connexion pattern of the nervous system of the octopus has given me a feeling of beginning to understand a little about the subject of memory. To study the material organization behind any subject or problem is surely the basis of a scientific approach. I shall go so far as to suggest evidence for the existence of a unit of memory or mnemon. The suggestion is made with great hesitation and in full awareness of its dangers. The technique of pushing the analysis of the system as far as possible on the basis of the connexion pattern seems to have brought increasing clarification. Recognition of the units is the next further step. Many of those who have so ably assisted in this work will probably not approve of the identification of a unit, still less of inventing a name for it. Many will regard it as a guess, especially since it is not supported by evidence from microelectrodes. Yet perhaps we need to try to identify units, not only as a basis for discussion but in order to find out where to look in our search for the electrical, chemical and other correlates of memory.

1879 ◽  
Vol 170 ◽  
pp. 37-54 ◽  

The many unexplained phenomena attending the passage of electricity through gases will probably for some time to come occupy the attention of experimental physicists. It is desirable that the subject should be approached from as many different sides as possible. One of our most powerful instruments of research is the spectroscope; but before it can be applied to the study in question, we have to settle the chemical origin of the different spectra which we observe in tubes, and to discuss in what way such spectra are liable to change under different circumstances. A special investigation has to be made for each gas; we have to study the effect of various impurities, the influence of the electrodes and that of the glass, which in the tubes generally used is considerably heated up by the spark. To make the investigation complete we have to vary as much as possible the pressure, the bore of the vacuum tube, and the strength of the spark. I have chosen Oxygen as a first subject of investigation. Though Plücker and Wüllner have, as far as their experiments went, accurately described the phenomena seen in oxygen tubes, the following paper contains much that is new, and will put some of the older facts on a firmer basis. When I first began to work, it was my intention to take the gases in groups, and to study their mixture; but as the following investigation has taken me a year’s nearly continuous work, and is complete in itself, I trust it will not be found unworthy of publication. I must, of course, at present confine myself to the purely spectroscopic point of view. As several of the observations which I shall have to record bear directly on the general theory of double spectra, I must briefly refer to our knowledge on that point.


1939 ◽  
Vol 26 (11) ◽  
pp. 1819-1822 ◽  
Author(s):  
L.G. Barrett

2020 ◽  
Vol 6 (2) ◽  
pp. 53-68
Author(s):  
Dan Teșculă

The present paper focuses on the nostalgia after the communist regime in Romania. This small study is a general overview of the progress I have made during the period between march and august on my PhD thesis regarding the nostalgia after the communist regime in Romania. The research methodology used is somewhat new in the field of conteporary history research. The quasi-experimental study was used in order to see if there are significant differences in the way the well-defined social categories perceive the feeling of nostalgia after communism. The period we spanned in this study is the so-called Ceaușescu epoch for wich we have had the most material to work with. From a historiographycal stand-point, the subject is very new, up until now the studies that have appeared during the past years, take the form of articles published in scientific reviews. More studies will eventually show up in the years to come. During this study we have identified small differences between the groups, that posess almost no relevance to our hypothesis. Theoretically educated people know how to present their memories which later have served as an explanation as to why they are not nostalgic. Surprisingly the working class has almost the same perception as the educated people (the intellectuals).


Author(s):  
Gladys Harrison

With the advent of the space age and the need to determine the requirements for a space cabin atmosphere, oxygen effects came into increased importance, even though these effects have been the subject of continuous research for many years. In fact, Priestly initiated oxygen research when in 1775 he published his results of isolating oxygen and described the effects of breathing it on himself and two mice, the only creatures to have had the “privilege” of breathing this “pure air”.Early studies had demonstrated the central nervous system effects at pressures above one atmosphere. Light microscopy revealed extensive damage to the lungs at one atmosphere. These changes which included perivascular and peribronchial edema, focal hemorrhage, rupture of the alveolar septa, and widespread edema, resulted in death of the animal in less than one week. The severity of the symptoms differed between species and was age dependent, with young animals being more resistant.


2017 ◽  
Vol 5 (2) ◽  
pp. 171
Author(s):  
Yusnawarni Yusnawarni

To commemorate the 21st century, a new learning model was designed in 2013 curriculum, in which there is a shift from teachers give knowledge to students become student must actively seek out knowledge from a variety of learning resources. In this case, the teacher acts as facilitators. Thus, language is a very central role, because the language should be in front of all other subjects. Curriculum 2013 imposed a thematic integrated learning which is no longer based subjects. Various subjects for primary schools (such as: Religion, Civics, Indonesian, Mathematics, Science, Social Studies, and so on) are integrated intoone book. The subject matter is not presented in textbook, but it presented in book thematics lesson, the themes are about nature, social life and culture. In this new curriculum, learning process is implemented by applying a scientific approach (observing, questioning, experimenting, associating, and networking) that includes three aspects such as attitudes, knowledge, and skills. So, how is the role of Indonesian in an integrated thematic learning by applying scientific approaches in primary schools in 2013 curriculum? By appying the method, the object of this paper is to gain preview about the role of Indonesian in 2013 curriculum that uses integrated thematic learning by scientific approach in primary schools.AbstrakUntuk menyongsong abad ke-21, model pembelajaran baru dirancang dalam Kurikulum 2013, yang di dalamnya terdapat pergeseran dari siswa diberi tahu menjadi siswa harus aktif mencari tahu ilmu pengetahuan dari berbagai sumber belajar. Dalam hal ini, guru berperan sebagai fasilitator. Dengan demikian, peran bahasa menjadi sangat sentral, karena bahasa harus berada di depan semua mata pelajaran lain. Kurikulum 2013 memberlakukan pembelajaran tematik terpadu yang tidak lagi berbasis mata pelajaran. Berbagai mata pelajaran untuk sekolah dasar (seperti: Agama, PPKN, Bahasa Indonesia, Matematika, IPA, IPS, dan sebagainya) diintegrasi menjadi satu buku. Materi pelajaran tidak disajikan dalam buku mata pelajaran, tetapi dalam buku tema pelajaran, baik tema alam, sosial, maupun budaya. Proses pembelajaran dalam kurikulum baru ini diimplementasikan melalui pendekatan saintifik (mengamati, menanya, menalar, mencoba, dan mengomunikasikan) yang mencakup tiga aspek, yaitu sikap, pengetahuan, dan keterampilan. Lalu, bagaimana peran bahasa Indonesia dalam pembelajaran tematik terpadu melalui pendekatan saintifik di sekolah dasar pada Kurikulum 2013 ini? Melaluimetode deskriptif, yang menjadi tujuan penulisan ini adalah mendapatkan gambaran mengenai peran bahasa Indonesia dalam Kurikulum 2013 yang menggunakan pembelajaran tematik terpadu melalui pendekatan saintifik di sekolah dasar.


Author(s):  
Chakravarthi Ram-Prasad

The Introduction outlines the various chapters. It then situates the question of ‘body’ in the modern Western philosophical tradition following Descartes, and argues that this leaves subsequent responses to come under one of three options: metaphysical dualism of body and subject; any anti-dualist reductionism; or the overcoming of the divide. Describing the Phenomenology of Merleau-Ponty as a potent example of the third strategy, the Introduction then suggests his philosophy will function as foil to the ecological phenomenology developed and presented in the book. Moreover, one approach within the Western Phenomenological tradition, of treating phenomenology as a methodology for the clarification of experience (rather than the means to the determination of an ontology of the subject) is compared to the approach in this book. Since classical India, while understanding dualism, did not confront the challenge of Descartes (for better or for worse), its treatment of body follows a different trajectory.


Author(s):  
Natalia Bryniarska-Kubiak ◽  
Andrzej Kubiak ◽  
Małgorzata Lekka ◽  
Agnieszka Basta-Kaim

AbstractNervous system diseases are the subject of intensive research due to their association with high mortality rates and their potential to cause irreversible disability. Most studies focus on targeting the biological factors related to disease pathogenesis, e.g. use of recombinant activator of plasminogen in the treatment of stroke. Nevertheless, multiple diseases such as Parkinson’s disease and Alzheimer’s disease still lack successful treatment. Recently, evidence has indicated that physical factors such as the mechanical properties of cells and tissue and topography play a crucial role in homeostasis as well as disease progression. This review aims to depict these factors’ roles in the progression of nervous system diseases and consequently discusses the possibility of new therapeutic approaches. The literature is reviewed to provide a deeper understanding of the roles played by physical factors in nervous system disease development to aid in the design of promising new treatment approaches. Graphic abstract


2021 ◽  
Vol 1 ◽  
pp. 121-130
Author(s):  
Julija Metic ◽  
Tim C. McAloone ◽  
Daniela C. A. Pigosso

AbstractThis study undertakes a systematic analysis of literature within Circular Economy (CE) in an industrial perspective, with a focus on understanding the consideration of the biological and technological cycles, as well as dual circularity. The paper articulates the key research differences, gaps and trends on the basis of publication evolution, key subject areas, influential journals and keywords co-occurrence mapping. The analysis shows the increasing publication trend with dominance of technological cycle and a wide variety of subject areas incorporated in CE biological, technological and dual cycles. Due to the multidisciplinary and transversal nature of CE, as well as its diverse interpretation and applications, an expansion and consolidation of the subject areas and journals are expected in the years to come. Analysis of co-occurrence on the authors' keywords underlined a limited focus of a business perspective research within the biological cycle, heterogeneous and proactive technological cycle but fragmented research on dual circularity. Further analysis of synergies and limitations is necessary to enhance business effectiveness towards enhanced sustainability.


1971 ◽  
Vol 97 (1) ◽  
pp. 17-67 ◽  
Author(s):  
R. H. Daw

‘Suppose a man becomes ill, gets worse and dies. His death is instantaneous but the cause of his death—deterioration of health—may have been progressing for some time. Death takes place because his health has deteriorated beyond a certain limit.’ So wrote C. D. Rich (1940) in introducing his ‘General theory of mortality’ which can also be regarded as a theory of sickness, although Rich does not develop this aspect of it. The point in the gradual deterioration of health at which death takes place is unmistakable but the point at which sickness begins is hazy and ill defined, as also is the point at which recovery from sickness takes place when health is improving. As Stocks (1949) says ‘The distinction between the living and the dead is clear cut, but no such frontier line between sickness and health can be said to exist except in the case of acute illness caused immediately and directly by an external agent. There is a zone between the two states in which the decision whether the subject is sick or not depends on definitions or standards of good health and also on who decides.’


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