Spaces of Memory

Daphnis ◽  
2021 ◽  
Vol 50 (1) ◽  
pp. 36-58
Author(s):  
Andrea Torre
Keyword(s):  
Constant Interest

Abstracts The essay aims to explore the theme of memory in Petrarch’s Latin Works and in his intellectual experience, analysing especially one of the two metaphoric fields of memory, namely that which defines memory as a space that can be created, organised, filled with contents, and revisited with the specific aim of learning and discovering while remembering past events. Petrarch’s constant interest in the structure and processes of memory and in the heuristic quality of the act of remembering seems to be effectively condensed into some metaphors (like thesaurus, arca, arx, cella, etc.) involved with the idea of repository that can be depicted in different ways depending on whether the aim is that of emphasising the value of the memories contained in it, or its possible religious applications, or its creative function.

scholarly journals TOURIST PROFILE IN POLAR REGIONS ON THE EXAMPLE OF VISITORS TO THE HENRYK ARCTOWSKI POLISH ANTARCTIC STATION

2020 ◽  
Vol 55 ◽  
pp. 167-182
Author(s):  
Anna Wilkońska ◽  
Wojciech Maciejowski ◽  
Marta Damaszke ◽  
Bartłomiej Jerzak ◽  
Radosław Łabno ◽  
...  
Keyword(s):  
South Shetland Islands ◽  
Polar Regions ◽  
Ecosystem Research ◽  
Access And Quality ◽  
First Time ◽  
Constant Interest ◽  
Source Materials ◽  
Practical Implications ◽  
Time Type

Purpose. Presentation of the current situation to the extent of touristic arrivals to Antarctica, in view of measuring the scale and structure of incoming tourism recorded at the Henryk Arctowski Polish Antarctic Station (King George Island, South Shetland Islands). Method. The number of persons arriving to the Arctowski Station was measured and subjects interviewed according to a standardised questionnaire. Findings. Research has indicated that there is constant interest in visiting Antarctica. These travellers are mainly people from Europe and North America, in particular seniors, with higher education, professionally active or retired, affluent and usually travelling individually. Research and conclusions limitations. Carrying out measurements regarding the scale and structure of incoming tourism is connected with various limitations, including the way in which such measurements are conducted, the access and quality of source materials or the human factor, i.e. interviewers. Practical implications. This article refers to the latest data concerning the number of persons arriving to the Arctowski Station and the structure of the tourist traffic, whichconstitute basic information for, among others, the tour operators. Originality. The problem involving the scale and structure of tourism, especially in polar regions, is still current and extremely significant due to the importance of the global ecosystem. Research on the structure of incoming tourism to Antarctica, according to the measurements at the Station, has been recently conducted and presented for the first time. Type of paper. In the article, the results of the authors research, similar to those relevant from literature, are presented.

scholarly journals PREFERENSI KONSUMEN TERHADAP FAKTOR-FAKTOR PENENTU KEPUASAN KONSUMEN DALAM PENGAMBILAN KEPUTUSAN PEMBELIAN PERUMAHAN BERSUBSIDI DI KARAWANG

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Budi Anthony ◽  
Nurahma Tresani ◽  
Ricky Pittra Halim
Keyword(s):  
Decision Making ◽  
Interest Rate ◽  
Environmental Factors ◽  
Consumer Satisfaction ◽  
Subsidized Housing ◽  
Price Subsidy ◽  
Level Of Satisfaction ◽  
Constant Interest Rate ◽  
Constant Interest

In the conditions of competitions among subsidized housing developers, attention should be given to the determinants of consumer satisfactions in the purchasing process of subsidized housing products, especially in Karawang. The low price of land in Karawang is expected to stimulate developers to build subsidized housing. Million House Program from Kemenpera provides a very low 5% price subsidy and a constant interest rate over the tenor of credit. However, this does not automatically make consumers buy subsidized houses built in Karawang. Therefore, the authors conduct research by distributing questionnaires directly to residents in Taman Palumbon Asri housing. Bhumi Baru Indah Persada and Griya Indah which is all located in Karawang. The purpose of this research is to identify the influence of price factor, location, condition of environment and condition of building to decision making of purchase and to identify consumer satisfaction toward subsidized housing, with sample 3 subsidized housing in Karawang. Whiter uses Index Compatibility Level to measure level of satisfaction and level of interest for each housing, and then analyze them by considering each factors (location, price, quality of building, and environmental factors)Keywords: Price, Location, Building, Environment, Consumer Satisfaction, Purchasing Decision, Index Compatibility Level.

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Lithography below 100 nm

1983 ◽  
Vol 41 ◽  
pp. 96-99
Author(s):  
L. D. Jackel
Keyword(s):  
Spatial Distribution ◽  
Electron Beam ◽  
Electron Scattering ◽  
Electron Beam Lithography ◽  
Substrate Material ◽  
Local Electron ◽  
Electron Dose ◽  
Positive Resist ◽  
Exposure Process

Most production electron beam lithography systems can pattern minimum features a few tenths of a micron across. Linewidth in these systems is usually limited by the quality of the exposing beam and by electron scattering in the resist and substrate. By using a smaller spot along with exposure techniques that minimize scattering and its effects, laboratory e-beam lithography systems can now make features hundredths of a micron wide on standard substrate material. This talk will outline sane of these high- resolution e-beam lithography techniques.We first consider parameters of the exposure process that limit resolution in organic resists. For concreteness suppose that we have a “positive” resist in which exposing electrons break bonds in the resist molecules thus increasing the exposed resist's solubility in a developer. Ihe attainable resolution is obviously limited by the overall width of the exposing beam, but the spatial distribution of the beam intensity, the beam “profile” , also contributes to the resolution. Depending on the local electron dose, more or less resist bonds are broken resulting in slower or faster dissolution in the developer.

Convergent Beam Electron Diffraction

1978 ◽  
Vol 36 (3) ◽  
pp. 304-315
Author(s):  
G. Lehmpfuhl
Keyword(s):  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Crystal Surface ◽  
Diffraction Spot ◽  
Crystal Thickness ◽  
Large Area ◽  
Electron Microscopic ◽  
Additional Information ◽  
Microscopic Investigations

Introduction In electron microscopic investigations of crystalline specimens the direct observation of the electron diffraction pattern gives additional information about the specimen. The quality of this information depends on the quality of the crystals or the crystal area contributing to the diffraction pattern. By selected area diffraction in a conventional electron microscope, specimen areas as small as 1 µ in diameter can be investigated. It is well known that crystal areas of that size which must be thin enough (in the order of 1000 Å) for electron microscopic investigations are normally somewhat distorted by bending, or they are not homogeneous. Furthermore, the crystal surface is not well defined over such a large area. These are facts which cause reduction of information in the diffraction pattern. The intensity of a diffraction spot, for example, depends on the crystal thickness. If the thickness is not uniform over the investigated area, one observes an averaged intensity, so that the intensity distribution in the diffraction pattern cannot be used for an analysis unless additional information is available.

Observability of Very Thick Specimen by Using Transmission Scanning Electron Microscope

1971 ◽  
Vol 29 ◽  
pp. 26-27
Author(s):  
K. Shibatomi ◽  
T. Yamanoto ◽  
H. Koike
Keyword(s):  
Electron Microscope ◽  
Image Quality ◽  
Scanning Electron Microscope ◽  
Chromatic Aberration ◽  
Image Contrast ◽  
Objective Lens ◽  
Thick Specimen ◽  
Transmission Electron ◽  
Scanning Electron

In the observation of a thick specimen by means of a transmission electron microscope, the intensity of electrons passing through the objective lens aperture is greatly reduced. So that the image is almost invisible. In addition to this fact, it have been reported that a chromatic aberration causes the deterioration of the image contrast rather than that of the resolution. The scanning electron microscope is, however, capable of electrically amplifying the signal of the decreasing intensity, and also free from a chromatic aberration so that the deterioration of the image contrast due to the aberration can be prevented. The electrical improvement of the image quality can be carried out by using the fascionating features of the SEM, that is, the amplification of a weak in-put signal forming the image and the descriminating action of the heigh level signal of the background. This paper reports some of the experimental results about the thickness dependence of the observability and quality of the image in the case of the transmission SEM.

The Current Situation in Chemical Stabilization of Biological Materials

1972 ◽  
Vol 30 ◽  
pp. 132-133
Author(s):  
John H. Luft
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Osmium Tetroxide ◽  
Molecular Level ◽  
Cross Linking ◽  
Chemical Stabilization ◽  
Specimen Preparation ◽  
Sufficient Condition ◽  
Radio Telescopes

With information processing devices such as radio telescopes, microscopes or hi-fi systems, the quality of the output often is limited by distortion or noise introduced at the input stage of the device. This analogy can be extended usefully to specimen preparation for the electron microscope; fixation, which initiates the processing sequence, is the single most important step and, unfortunately, is the least well understood. Although there is an abundance of fixation mixtures recommended in the light microscopy literature, osmium tetroxide and glutaraldehyde are favored for electron microscopy. These fixatives react vigorously with proteins at the molecular level. There is clear evidence for the cross-linking of proteins both by osmium tetroxide and glutaraldehyde and cross-linking may be a necessary if not sufficient condition to define fixatives as a class.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

Sign in / Sign up

Export Citation Format

Share Document