Freedom and Influence in Formative Education

Author(s):  
Kyla Ebels-Duggan

The principle that children’s freedom should be preserved in their upbringing is sometimes viewed as an alternative to imposing a particular conception of the good on them. But to sustain the alternative we must distinguish between those desires and proclivities that are educated into a person and those that are his own. Several philosophers appeal to innate or presocial tendencies to ground this distinction, but that approach fails. The ability to exercise first personal authority provides a better conception of what it is for a desire or commitment to be one’s own. However, states educated into a person may also be subject to her first personal authority. Thus, while the ideal of autonomy can provide guidance for child-rearing, it cannot substitute for teaching children a conception of the good.

1951 ◽  
Vol 13 (2) ◽  
pp. 169-190
Author(s):  
Robert F. Byrnes

Established societies as well as revolutionary organizations and movements have always developed, though often only obscurely, a vision of an ideal society, generally located in the future although often also in the romantic past. For established communities, the goal sought by the society has had tremendous significance because faith in the desirability of the end envisioned has been one of the chief binding forces. Perhaps of even greater importance has been the dynamic stimulus the belief in an ideal society has given to rising revolutionary movements, such as those which have led to the great upheavals of history. The ultimate and ideal goal is particularly significant during times of crisis, when the loyalties of men are shaken and when frequently the factors most decisive in determining a citizen's position are his acceptance of and confidence in the final aims of the group to which he belongs. As an eminent English dramatist once said, a map of the world which does not include the ideal society has little interest for man, for it is upon the shores of such societies that man is always landing.A study of a conception of the good society is not only an analysis of a source of cohesion and power; it can also shed great illumination upon an entire system of thought. The examination of a philosophy from this angle, that of the ultimate, ideal aims to be achieved, is particularly revealing in the case of Konstantine Petrovich Pobedonostsev, who was lay administrator of the Russian Orthodox Church from 1880 until October, 1905, and was one of the most prominent statesmen in Russia during the last third of the nineteenth century. During the 1880's in particular, he was as powerful in determining the direction of Russian domestic policy as Bismarck was for three decades in guiding the German state.


2001 ◽  
Vol 18 (1-2) ◽  
pp. 107-116 ◽  
Author(s):  
Robert W. Hall

A recent study contends that for Plato, the state, including the ideal state of the Republic, is better governed by unfettered personal authority than by law. The present study maintains that even in the Republic and the Statesman, as well as in the Laws, it is law, not unfettered personal rule that underlies the state. Justification for such authoritarian rule, especially in the ideal state of the Republic, lies in the supposed inability of the ordinary individual to acquire moral autonomy or Platonic justice owing to a lack of the necessary knowledge. But it is shown in this study that the ordinary individual of the ideal state can acquire an educated right opinion sufficient for gaining moral autonomy or Platonic justice.


Author(s):  
M.S. Shahrabadi ◽  
T. Yamamoto

The technique of labeling of macromolecules with ferritin conjugated antibody has been successfully used for extracellular antigen by means of staining the specimen with conjugate prior to fixation and embedding. However, the ideal method to determine the location of intracellular antigen would be to do the antigen-antibody reaction in thin sections. This technique contains inherent problems such as the destruction of antigenic determinants during fixation or embedding and the non-specific attachment of conjugate to the embedding media. Certain embedding media such as polyampholytes (2) or cross-linked bovine serum albumin (3) have been introduced to overcome some of these problems.


Author(s):  
R. A. Crowther

The reconstruction of a three-dimensional image of a specimen from a set of electron micrographs reduces, under certain assumptions about the imaging process in the microscope, to the mathematical problem of reconstructing a density distribution from a set of its plane projections.In the absence of noise we can formulate a purely geometrical criterion, which, for a general object, fixes the resolution attainable from a given finite number of views in terms of the size of the object. For simplicity we take the ideal case of projections collected by a series of m equally spaced tilts about a single axis.


Author(s):  
R. Beeuwkes ◽  
A. Saubermann ◽  
P. Echlin ◽  
S. Churchill

Fifteen years ago, Hall described clearly the advantages of the thin section approach to biological x-ray microanalysis, and described clearly the ratio method for quantitive analysis in such preparations. In this now classic paper, he also made it clear that the ideal method of sample preparation would involve only freezing and sectioning at low temperature. Subsequently, Hall and his coworkers, as well as others, have applied themselves to the task of direct x-ray microanalysis of frozen sections. To achieve this goal, different methodological approachs have been developed as different groups sought solutions to a common group of technical problems. This report describes some of these problems and indicates the specific approaches and procedures developed by our group in order to overcome them. We acknowledge that the techniques evolved by our group are quite different from earlier approaches to cryomicrotomy and sample handling, hence the title of our paper. However, such departures from tradition have been based upon our attempt to apply basic physical principles to the processes involved. We feel we have demonstrated that such a break with tradition has valuable consequences.


Author(s):  
G. Van Tendeloo ◽  
J. Van Landuyt ◽  
S. Amelinckx

Polytypism has been studied for a number of years and a wide variety of stacking sequences has been detected and analysed. SiC is the prototype material in this respect; see e.g. Electron microscopy under high resolution conditions when combined with x-ray measurements is a very powerful technique to elucidate the correct stacking sequence or to study polytype transformations and deviations from the ideal stacking sequence.


Author(s):  
N. Bonnet ◽  
M. Troyon ◽  
P. Gallion

Two main problems in high resolution electron microscopy are first, the existence of gaps in the transfer function, and then the difficulty to find complex amplitude of the diffracted wawe from registered intensity. The solution of this second problem is in most cases only intended by the realization of several micrographs in different conditions (defocusing distance, illuminating angle, complementary objective apertures…) which can lead to severe problems of contamination or radiation damage for certain specimens.Fraunhofer holography can in principle solve both problems stated above (1,2). The microscope objective is strongly defocused (far-field region) so that the two diffracted beams do not interfere. The ideal transfer function after reconstruction is then unity and the twin image do not overlap on the reconstructed one.We show some applications of the method and results of preliminary tests.Possible application to the study of cavitiesSmall voids (or gas-filled bubbles) created by irradiation in crystalline materials can be observed near the Scherzer focus, but it is then difficult to extract other informations than the approximated size.


Author(s):  
K.-H. Herrmann ◽  
D. Krahl ◽  
H.-P Rust

The high detection quantum efficiency (DQE) is the main requirement for an imagerecording system used in electron microscopy of radiation-sensitive specimens. An electronic TV system of the type shown in Fig. 1 fulfills these conditions and can be used for either analog or digital image storage and processing [1], Several sources of noise may reduce the DQE, and therefore a careful selection of various elements is imperative.The noise of target and of video amplifier can be neglected when the converter stages produce sufficient target electrons per incident primary electron. The required gain depends on the type of the tube and also on the type of the signal processing chosen. For EBS tubes, for example, it exceeds 10. The ideal case, in which all impinging electrons create uniform charge peaks at the target, is not obtainable for several reasons, and these will be discussed as they relate to a system with a scintillator, fiber-optic and photo-cathode combination as the first stage.


Author(s):  
T. Ichinokawa ◽  
H. Maeda

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.


Author(s):  
R. Vincent

Microanalysis and diffraction on a sub-nanometre scale have become practical in modern TEMs due to the high brightness of field emission sources combined with the short mean free paths associated with both elastic and inelastic scattering of incident electrons by the specimen. However, development of electron diffraction as a quantitative discipline has been limited by the absence of any generalised theory for dynamical inelastic scattering. These problems have been simplified by recent innovations, principally the introduction of spectrometers such as the Gatan imaging filter (GIF) and the Zeiss omega filter, which remove the inelastic electrons, combined with annual improvements in the speed of computer workstations and the availability of solid-state detectors with high resolution, sensitivity and dynamic range.Comparison of experimental data with dynamical calculations imposes stringent requirements on the specimen and the electron optics, even when the inelastic component has been removed. For example, no experimental CBED pattern ever has perfect symmetry, departures from the ideal being attributable to residual strain, thickness averaging, inclined surfaces, incomplete cells and amorphous surface layers.


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