scholarly journals Revisiting the ‘Wrong Kind of Object’ Problem

Organon F ◽  
2021 ◽  
Vol 28 (1) ◽  
pp. 168-197
Author(s):  
Merel Semeijn ◽  
Edward Zalta
Keyword(s):  
2019 ◽  
Vol 2 (2) ◽  
pp. 146
Author(s):  
Yayuk Hidayah ◽  
Suyitno Suyitno ◽  
Lisa Retnasari

The service partner is the TPQ Silastra Condong Catur, Darul Falah TPQ Maguwo Harjo Maguwo Harjo, TPA Al-Huda Caturtunggal, Yogyakarta. The reason for determining the proposed object problem is the background of the problems that arise in the lack of use of the Al-Quran Education Park (TPA) as the center of religus character education. The solution proposed by the dedication team was to integrate the Al-Quran reading and writing learning with the values of religious characters to the santri. The method used by the service team is consultation, mentoring, and training. The contribution proposed by the dedication team is for TPA to maximize the role of TPA in religious character education. For santri, they can get additional knowledge. For the community, they can support the efforts to cultivate religious character education. The conclusion is that the existence of TPA is still essential in society as a place of education for children.


2005 ◽  
Vol 4 (2) ◽  
pp. 143-150 ◽  
Author(s):  
Xiaochuan Pan ◽  
Yu Zou ◽  
Dan Xia ◽  
Emil Y. Sidky

The suffciency conditions are derived for exact image reconstruction of a 3D ROI from projections acquired with a reduced helical scan over an angular range considerably smaller than that required by image reconstruction in, e.g., the conventional long object problem, for which the scanned angular range is often more than 2π. ROI reconstruction is investigated by a recently developed filtered-backprojection algorithm that can make use of data acquired with a reduced helical scan. Preliminary numerical studies demonstrate and validate the ROI reconstruction. This work may have significant practical implications because a reduced scan in CT often translates to reduced motion artifacts and reduced radiation dose delivered to the subject.


2001 ◽  
Vol 78 (3-4) ◽  
pp. 497-511 ◽  
Author(s):  
R.P. Gilbert ◽  
Miao-Jung OU ◽  
Yongzhi S. XU

1998 ◽  
Vol 103 (3) ◽  
pp. 1320-1327 ◽  
Author(s):  
R. P. Gilbert ◽  
T. Scotti ◽  
A. Wirgin ◽  
Y. S. Xu
Keyword(s):  

2000 ◽  
Vol 45 (3) ◽  
pp. 623-643 ◽  
Author(s):  
Michel Defrise ◽  
Frédéric Noo ◽  
Hiroyuki Kudo

Dialogue ◽  
2000 ◽  
Vol 39 (1) ◽  
pp. 3-24
Author(s):  
Shelagh Crooks

RésuméL'idée que les images mentales sont des tableaux ou des objets dans l'esprit joue un rôle extrêmement important dans la conception que David Hume se fait de l'esprit et dans sa doctrine générate quant à la nature de la pensée. La question que veut explorer le présent article est la suivante : la doctrine humienne des images mentales comme objets-dans-l'esprit est-elle viable? On soutiendra qu'une défense très forte de la conception de Hume peut être aujourd'hui développée sur la base de donnèes relatives à la nature de l'imagerie mentale qui ont été récemment avancées dans le domaine de la psychologie cognitive.


2003 ◽  
Vol 2003 (21) ◽  
pp. 1305-1321 ◽  
Author(s):  
Alexander Katsevich

Given a rather general weight functionn0, we derive a new cone beam transform inversion formula. The derivation is explicitly based on Grangeat's formula (1990) and the classical 3D Radon transform inversion. The new formula is theoretically exact and is represented by a 2D integral. We show that if the source trajectoryCis complete in the sense of Tuy (1983) (and satisfies two other very mild assumptions), then substituting the simplest weightn0≡1gives a convolution-based FBP algorithm. However, this easy choice is not always optimal from the point of view of practical applications. The weightn0≡1works well for closed trajectories, but the resulting algorithm does not solve the long object problem ifCis not closed. In the latter case one has to use the flexibility in choosingn0and find the weight that gives an inversion formula with the desired properties. We show how this can be done for spiral CT. It turns out that the two inversion algorithms for spiral CT proposed earlier by the author are particular cases of the new formula. For general trajectories the choice of weight should be done on a case-by-case basis.


Sign in / Sign up

Export Citation Format

Share Document