Choosing Normative Concepts

2017 ◽  
Author(s):  
Matti Eklund
Keyword(s):  
Normative Realism ◽  
Central Topic ◽  
Conceptual Engineering ◽  
Normative Concepts ◽  
Better Than

Theorists working on metaethics and the nature of normativity typically study goodness, rightness, what ought to be done, etc. In their investigations they employ and consider our actual normative concepts. But the actual concepts of goodness, rightness, and what ought to be done are only some of the possible normative concepts. There are other possible concepts, ascribing different properties. In this book, the consequences of this are explored, for example for the debate over normative realism and for the debate over what it is for concepts and properties to be normative. In recent years, conceptual engineering—the project of considering how our concepts can be replaced by better ones—has become a central topic in philosophy. The present work applies this proposed methodology to central normative concepts and discusses the special complications that arise in this case. For example, how should we, in the context, understand talk of a concept being better than another?

Ardent Realism

2017 ◽  
Author(s):  
Matti Eklund
Keyword(s):  
Political Philosophy ◽  
Normative Realism ◽  
Normative Concepts ◽  
The World ◽  
Conceptual Resources ◽  
The Way

This chapter introduces some main issues of the book. First, one motivation underlying normative realism is the desire to vindicate the sense that the world itself objectively undergirds certain ways of valuing and behaving. But on standard characterizations of realism, realism can be true without this desire being satisfied. Calling a realist motivated in the way described an ardent realist, mere realism is not sufficient for ardent realism. Second, much moral and political philosophy is ideologically conservative in the sense that it uncritically makes use of the conceptual resources we find ourselves with: but what if these resources, including the most general normative concepts, are themselves objectionable or otherwise defective?

Some Metaphilosophical Issues

2017 ◽  
Author(s):  
Matti Eklund
Keyword(s):  
Philosophy Of Language ◽  
Quantifier Variance ◽  
Normative Concept ◽  
Conceptual Engineering ◽  
Normative Concepts ◽  
Applied Philosophy

This chapter discusses three metaphilosophical issues. First, the themes that have been the focus of the discussion relate to the trend of considering conceptual engineering, or conceptual ethics: how can we improve on the concepts we currently have? In fact, consideration of thin normative concepts presents distinctive theoretical questions: what do or can we mean when we ask whether some possible thin normative concept is better than another? Second, much contemporary metaethics focuses on accounting for our actual normative terms and concepts and is a kind of applied philosophy of language: but what is the broader philosophical upshot of such discussions? Third, the book’s main themes parallel the discussion of quantifier variance in metaontology. The similarities between these parallels are explored.

Conceptual Engineering without Bedrock and without Fixed Points

2018 ◽  
Author(s):  
Herman Cappelen
Keyword(s):  
Conceptual Change ◽  
Fixed Points ◽  
Asymmetric Structure ◽  
Empirical Claim ◽  
Safe Spaces ◽  
Conceptual Engineering ◽  
Normative Concepts

This chapter considers whether there are any limits to conceptual engineering, developing the idea that there are no safe spaces from conceptual change. First, it considers Chalmers’s argument for bedrock concepts. It argues that Chalmers’s claim that there is an asymmetric structure in the space of disputes is an (implausible) empirical claim. Second, it considers Eklund’s claim to the effect that our thinnest normative concepts are irreplaceable, and this is a limit to conceptual engineering, and shows that Eklund doesn’t establish this. It ends by revisiting some old worries, defending the choice of the term ‘conceptual engineering’, and responding to the claim that by making conceptual engineering inscrutable and out of control, it has been debunked rather than defended. However, conceptual engineering is very hard for us to do, but so is (almost) everything that is important to us.

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Localization of immunolabels by electron microscopy and image averaging

1983 ◽  
Vol 41 ◽  
pp. 282-283
Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy
Keyword(s):  
Electron Microscopy ◽  
Single Particle ◽  
Attachment Site ◽  
Uranyl Acetate ◽  
Limulus Polyphemus ◽  
Resolution Limit ◽  
Electron Microscopic ◽  
Image Averaging ◽  
Top View ◽  
Better Than

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Electron Microscopic Observation of the Longitudinal Organization of Poly (p-Phenylene Terephthalamide) Fibers

1982 ◽  
Vol 40 ◽  
pp. 680-681
Author(s):  
Li Li-Sheng ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Microscopic Observation ◽  
Electron Microscopic Observation ◽  
Electron Microscopic ◽  
Aromatic Polyamides ◽  
Radial Arrangement ◽  
Scanning Electron ◽  
Better Than

The aromatic polyamides form a class of fibers having mechanical properties which are much better than those of aliphatic polyamides. Currently, the accepted morphology of these fibers as proposed by M.G. Dobb, et al. is a radial arrangement of pleated sheets, with the plane of the pleats parallel to the axis of the fiber. We have recently obtained evidence which supports a different morphology of this type of fiber, using ultramicrotomy and ion-thinning techniques to prepare specimens for transmission and scanning electron microscopy.

A High Angle, Double Tilting Cold Stage for the AEI EM7

1974 ◽  
Vol 32 ◽  
pp. 450-451
Author(s):  
P.R. Swann ◽  
A.E. Lloyd
Keyword(s):  
Habit Plane ◽  
Temperature Control ◽  
Tilt Angle ◽  
Cooling System ◽  
Thermal Drift ◽  
High Angle ◽  
Cold Stage ◽  
High Degree ◽  
Better Than

Figure 1 shows the design of a specimen stage used for the in situ observation of phase transformations in the temperature range between ambient and −160°C. The design has the following features a high degree of specimen stability during tilting linear tilt actuation about two orthogonal axes for accurate control of tilt angle read-out high angle tilt range for stereo work and habit plane determination simple, robust construction temperature control of better than ±0.5°C minimum thermal drift and transmission of vibration from the cooling system.

Thermal Considerations in Lens Regulator Systems

1970 ◽  
Vol 28 ◽  
pp. 358-359
Author(s):  
K.C. Newton
Keyword(s):  
Electron Microscope ◽  
Thermal Effects ◽  
Environmental Control ◽  
Reference Networks ◽  
Better Than

Thermal effects in lens regulator systems have become a major problem with the extension of electron microscope resolution capabilities below 5 Angstrom units. Larger columns with immersion lenses and increased accelerating potentials have made solutions more difficult by increasing the power being handled. Environmental control, component choice, and wiring design provide answers, however. Figure 1 indicates with broken lines where thermal problems develop in regulator systemsExtensive environmental control is required in the sampling and reference networks. In each case, stability better than I ppm/min. is required. Components with thermal coefficients satisfactory for these applications without environmental control are either not available or priced prohibitively.

Finding the Right Problems: Some HREM Applications to Interfaces

1984 ◽  
Vol 42 ◽  
pp. 376-379
Author(s):  
D. Cherns
Keyword(s):  
Grain Boundaries ◽  
High Resolution Electron Microscopy ◽  
Boundary Structure ◽  
Atomic Structures ◽  
Grain Boundary Structure ◽  
Resolution Electron ◽  
Point To Point ◽  
The Right ◽  
New Generation ◽  
Better Than

The use of high resolution electron microscopy (HREM) to determine the atomic structure of grain boundaries and interfaces is a topic of great current interest. Grain boundary structure has been considered for many years as central to an understanding of the mechanical and transport properties of materials. Some more recent attention has focussed on the atomic structures of metalsemiconductor interfaces which are believed to control electrical properties of contacts. The atomic structures of interfaces in semiconductor or metal multilayers is an area of growing interest for understanding the unusual electrical or mechanical properties which these new materials possess. However, although the point-to-point resolutions of currently available HREMs, ∼2-3Å, appear sufficient to solve many of these problems, few atomic models of grain boundaries and interfaces have been derived. Moreover, with a new generation of 300-400kV instruments promising resolutions in the 1.6-2.0 Å range, and resolutions better than 1.5Å expected from specialist instruments, it is an appropriate time to consider the usefulness of HREM for interface studies.

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