scholarly journals Introduction

2014 ◽  
pp. 07-21
Author(s):  
Christoph F. E. Holzhey

Multistable figures offer an intriguing model for arbitrating conflicting positions. Moving back and forth between the different aspects under which something can be seen, one recognizes that mutually contradictory descriptions can be equally valid and that disputes over the correct account can be resolved without dissolving differences or establishing a higher synthesis. Yet, the experience of a gestalt switch also offers a model for radical conversions and revolutions – that is, for irreversible leaps to incommensurable alternatives foiling ideals of rational choice while providing the possibility and necessity of decision. Accentuating the temporal dimensions of multistable figures, this multidisciplinary volume illuminates the critical potentials and limits of multistability as a complex figure of thought.

Author(s):  
Christoph F. E. Holzhey

Multistable figures offer an intriguing model for arbitrating conflicting positions. Moving back and forth between the different aspects under which something can be seen, one recognizes that mutually contradictory descriptions can be equally valid and that disputes over the correct account can be resolved without dissolving differences or establishing a higher synthesis. Yet, the experience of a gestalt switch also offers a model for radical conversions and revolutions – that is, for irreversible leaps to incommensurable alternatives foiling ideals of rational choice while providing the possibility and necessity of decision. Accentuating the temporal dimensions of multistable figures, this multidisciplinary volume illuminates the critical potentials and limits of multistability as a complex figure of thought.


2014 ◽  

Multistable figures offer an intriguing model for arbitrating conflicting positions. Moving back and forth between the different aspects under which something can be seen, one recognizes that mutually contradictory descriptions can be equally valid and that disputes over the correct account can be resolved without dissolving differences or establishing a higher synthesis. Yet, the experience of a gestalt switch also offers a model for radical conversions and revolutions – that is, for irreversible leaps to incommensurable alternatives foiling ideals of rational choice while providing the possibility and necessity of decision. Accentuating the temporal dimensions of multistable figures, this multidisciplinary volume illuminates the critical potentials and limits of multistability as a complex figure of thought.


Author(s):  
S. J. Pennycook

Using a high-angle annular detector on a high-resolution STEM it is possible to form incoherent images of a crystal lattice characterized by strong atomic number or Z contrast. Figure 1 shows an epitaxial Ge film on Si(100) grown by oxidation of Ge-implanted Si. The image was obtained using a VG Microscopes' HB501 STEM equipped with an ultrahigh resolution polepiece (Cs ∽1.2 mm, demonstrated probe FWHM intensity ∽0.22 nm). In both crystals the lattice is resolved but that of Ge shows much brighter allowing the interface to be located exactly and interface steps to be resolved (arrowed). The interface was indistinguishable in the phase-contrast STEM image from the same region, and even at higher resolution the location of the interface is complex. Figure 2 shows a thin region of an MBE-grown ultrathin super-lattice (Si8Ge2)100. The expected compositional modulation would show as one bright row of dots from the 2 Ge monolayers separated by 4 rows of lighter Si columns. The image shows clearly that strain-induced interdiffusion has occurred on the monolayer scale.


2004 ◽  
Vol 15 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Thomas Merten ◽  
Matthias Henry ◽  
Robin Hilsabeck

Zusammenfassung: In der neuropsychologischen Diagnostik, mehr noch aber in der Begutachtung gewinnen Symptomvalidierungstests (SVT) zur Untersuchung der Leistungsmotivation zunehmend an Bedeutung. In einer Analogstudie wurde die Güte zweier international bekannter Verfahren (Word Memory Test; Amsterdam Short Term Memory Test) sowie einer Neuentwicklung (Word Completion Memory Test) untersucht. Zusätzlich wurden Leistungstests eingesetzt: der Trail Making Test (TMT), der Complex Figure Test sowie die Standard Progressive Matrices (SPM). Eine Gruppe von 10 experimentellen Simulanten wurde spezifisch auf die Vortäuschung von Gedächtnisstörungen vorbereitet, während eine Kontrollgruppe (n = 10) optimale Testanstrengung zeigen sollte. Alle SVT führten im Gegensatz zu den Simulationsmarkern des TMT und der SPM zu einer ausgezeichneten Klassifikationsgüte (95-100 %). Die neuropsychologischen Leistungsmaße wiesen zwar signifikante Gruppenunterschiede aus, zeigten aber auch eine nicht unbedeutende Überlappung der Verteilungen. Mehr Studien sind notwendig, um den SVT in den deutschsprachigen Ländern den Platz zu sichern, den sie international aktuell in der klinisch-neuropsychologischen Forschung und Praxis einnehmen.


OUGHTOPIA ◽  
2020 ◽  
Vol 35 (2) ◽  
pp. 247-282
Author(s):  
In-Kyun Kim ◽  
Myeong-Geon Koh

In automated control systems for technical processes, the conversion of a continuous signal into a digital code and vice versa from a digital code to a continuous (analog) value is widely used. For direct type converters often used the term ADC, the reverse - DAC. The characteristics of the converters often dramatically affect the parameters of the entire automated system. The importance of the correct choice of ADCs and DACs has especially increased recently in connection with the mass introduction of microcontrollers MC. Indeed, in addition to the ADC and DAC, it is necessary to place the processor core in the microcontroller's crystal, I/O interfaces and many other elements necessary for the functioning of the MC. The use of information converters in the construction industry imposes additional requirements on converters: for example, in building monitoring systems, precision ADCs with extremely high accuracy are often required (while performance may be low), in other applications it is necessary to provide the necessary parameters at a high level of industrial interference, etc. This article explores issues related to the rational choice of ADCs and DACs, taking into account current trends in the IT field and the specifics of work in the construction industry. Sigma-Delta converters are noted as the most promising models of direct type converters.


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