1,922 research outputs found
Enhanced hyperalignment via spatial prior information
No full textFunctional alignment between subjects is an important assumption of
functional magnetic resonance imaging (fMRI) group-level analysis. However, it
is often violated in practice, even after alignment to a standard anatomical
template. Hyperalignment, based on sequential Procrustes orthogonal
transformations, has been proposed as a method of aligning shared functional
information into a common high-dimensional space and thereby improving
inter-subject analysis. Though successful, current hyperalignment algorithms
have a number of shortcomings, including difficulties interpreting the
transformations, a lack of uniqueness of the procedure, and difficulties
performing whole-brain analysis. To resolve these issues, we propose the
ProMises (Procrustes von Mises-Fisher) model. We reformulate functional
alignment as a statistical model and impose a prior distribution on the
orthogonal parameters (the von Mises-Fisher distribution). This allows for the
embedding of anatomical information into the estimation procedure by penalizing
the contribution of spatially distant voxels when creating the shared
functional high-dimensional space. Importantly, the transformations, aligned
images, and related results are all unique. In addition, the proposed method
allows for efficient whole-brain functional alignment. In simulations and
application to data from four fMRI studies we find that ProMises improves
inter-subject classification in terms of between-subject accuracy and
interpretability compared to standard hyperalignment algorithms.Comment: 28 pages, 9 figure
The Hermann-Martin curve
No full textEvery linear system can be naturally identified with a rational curve in a Grassmann variety. The associated curve is often referred to as the Hermann-Martin curve of the system. “This article explains this crucial link between systems theory and geometry. The geometric translation
also provides important tools when studying control design problems. In the second part of the article, it is shown howit is possible to tackle some important control design problems by geometric means
Ballet dancers at Jacob's Pillow
No full textA newspaper article titled, "The Dance: A Man's Art" by John Martin about male dancing from the Sunday Times, ca. Feb. 2, 1935. The newspaper article describes how dancing can be beneficial for men and how dancing, as an art expression, does not have to collide against the masculinity expectations of the time. The article was written by John Martin at the request of several inquiries by readers.For biographical information on Ted Shawn, see: https://springfield.as.atlas-sys.com/agents/people/584.A printed caption on the back reads: "John Lindquist 16 La Grange St., Boston 16, MA"
The Swedish Welfare State: The Role of Supplementary Compensations
No full textThe Swedish welfare state has a social security system that covers many forms of income losses and gives a high compensation. Compensation is given for loss of income due to sick leave, parental leave, disability, work injury, unemployment and retirement at old age. But there are also complementing compensation systems. The most important ones are those decided by collective agreements between unions and employer associations. They are sometimes organized as an insurance, in other cases as an agreement that the employer should pay the compensation. There are also other forms of complements than those based on collective agreements, for example complementing unemployment insurances for members of unions. Even if the complements are organized in different ways, they add to the social insurances in more or less the same way. They give an addition under the ceiling in the social insurance systems, they give compensation over the ceiling so that they more or less eliminate the effects of the ceiling, and they lengthen the compensation period in some cases. This means that the consolidated welfare state differs in a systematic way from that which is determined by the Parliament. In this paper we describe the differences and discuss the factors that determine the differences between the two welfare states – the traditional one and the consolidated one.-
Review of \u3ci\u3eBirger Sandzen: An Illustrated Biography\u3c/i\u3e By Emory Lindquist
No full textIn Birger Sandzén Lindquist combines biography and art analysis. The first half of the book looks at Sandzen\u27s early years and his decades at Bethany College. After a rich section of forty-nine color plates, the author turns to an examination of the influences on his painting, his methods, the response of art critics, the graphic work, and Sandzen\u27s association with two friends as documented in correspondence. The overall result is a wellrounded picture of a positive adventurer, a regional painter whose work well deserves the recognition afforded it here
Does using SIOP (sheltered instruction observation protocol) help high school ELL students learn elementary mathematics?
No full textThe research question addressed in this project was, Does using SIOP (Sheltered Instruction Observation Protocol) help high school ELL students learn elementary mathematics? It documents one teacher\u27s journey through creating a unique curriculum that incorporates the features of SIOP while addressing Minnesota state standards. The curriculum was developed based on Lindquist\u27s research into the methods that are successful in teaching English Language Learners. The author documents the details of the unit and uses related research literature to construct meaning and validate the study. She describes the struggles and successes of both writing and implementing the curriculum and concludes that: 1) SIOP implementation is time consuming when first adding it to lessons but leads to better student learning and 2) English Language Learners benefit from a curriculum that takes into account their unique learning situation and abilities
MEP_and_recovery_SuppMat_NNR_revised – Supplemental material for Differential Poststroke Motor Recovery in an Arm Versus Hand Muscle in the Absence of Motor Evoked Potentials
No full textSupplemental material, MEP_and_recovery_SuppMat_NNR_revised for Differential Poststroke Motor Recovery in an Arm Versus Hand Muscle in the Absence of Motor Evoked Potentials by Heidi M. Schambra, Jing Xu, Meret Branscheidt, Martin Lindquist, Jasim Uddin, Levke Steiner, Benjamin Hertler, Nathan Kim, Jessica Berard, Michelle D. Harran, Juan C. Cortes, Tomoko Kitago, Andreas Luft, John W. Krakauer and Pablo A. Celnik in Neurorehabilitation and Neural Repair</p
Assessing uncertainty in dynamic functional connectivity
No full textFunctional connectivity (FC) - the study of the statistical association between time series from anatomically distinct regions (Friston, 1994, 2011) - has become one of the primary areas of research in the field surrounding resting state functional magnetic resonance imaging (rs-fMRI). Although for many years researchers have implicitly assumed that FC was stationary across time in rs-fMRI, it has recently become increasingly clear that this is not the case and the ability to assess dynamic changes in FC is critical for better understanding of the inner workings of the human brain (Hutchison et al., 2013; Chang and Glover, 2010). Currently, the most common strategy for estimating these dynamic changes is to use the sliding-window technique. However, its greatest shortcoming is the inherent variation present in the estimate, even for null data, which is easily confused with true time-varying changes in connectivity (Lindquist et al., 2014). This can have serious consequences as even spurious fluctuations caused by noise can easily be confused with an important signal. For these reasons, assessment of uncertainty in the sliding-window correlation estimates is of critical importance. Here we propose a new approach that combines the multivariate linear process bootstrap (MLPB) method and a sliding-window technique to assess the uncertainty in a dynamic FC estimate by providing its confidence bands. Both numerical results and an application to rs-fMRI study are presented, showing the efficacy of the proposed method
Buried Roots and Indestructible Seeds
No full textThis anthology highlights central values and traditions in Native American societies, exploring the ongoing struggles and survival power of Native American people today. The essays and stories by well-known writers provide an excellent introduction for general readers as well as high school and college students. The stories and historical events are drawn especially from the tribes of the Great Lakes region, such as the Ojibwa (Chippewa) of Wisconsin, and are part of a continuing, sustaining storytelling tradition. Starting with the opening selection, "The Circle of Stories," which reaffirms the relationship of humans to all living things, the anthology emphasizes themes of connectedness and survival in essays on the environment, identity, community allegiance and treaty rights, marginalization and assimilation in American society, and conflict within the educational system. Several selections about Trickster tales introduce traditions of humor, irony, and imagination that have come to embody native survival, liberation, and continuance
Buried Roots and Indestructible Seeds
No full textThis anthology highlights central values and traditions in Native American societies, exploring the ongoing struggles and survival power of Native American people today. The essays and stories by well-known writers provide an excellent introduction for general readers as well as high school and college students. The stories and historical events are drawn especially from the tribes of the Great Lakes region, such as the Ojibwa (Chippewa) of Wisconsin, and are part of a continuing, sustaining storytelling tradition. Starting with the opening selection, "The Circle of Stories," which reaffirms the relationship of humans to all living things, the anthology emphasizes themes of connectedness and survival in essays on the environment, identity, community allegiance and treaty rights, marginalization and assimilation in American society, and conflict within the educational system. Several selections about Trickster tales introduce traditions of humor, irony, and imagination that have come to embody native survival, liberation, and continuance
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