Search results for: Steve Halperin

Items from 1 to 9 out of 9 results

article

Sex differences in psychological distress, behavioural and emotional problems, and substance use in young people in out‐of‐home care

Sue M. Cotton, Simon Rice, Kristen Moeller‐Saxone, Anne Magnus, more

Child & Family Social Work > 25 > 2 > 325 - 336

The aim of the study was to examine sex differences in self‐reported psychological distress, behavioural and emotional problems, and substance use in young people living in out‐of‐home care (OoHC). One hundred seventy‐six young people aged 12–17 years (females 53.4%) in OoHC in metropolitan Melbourne, Australia, were interviewed. Participants completed self‐report measures: Kessler Psychological Distress...

article

“Some guidance and somewhere safe”: Caregiver and clinician perspectives on service provision for families of young people experiencing serious suicide ideation and attempt

Sarah‐Jane A. Dempsey, Steve Halperin, Karen Smith, Christopher G. Davey, more

Clinical Psychologist > 23 > 2 > 103 - 111

Background Previous research has recommended the involvement of caregivers in the treatment of young people with depressive illness, but the best form and type of involvement remains largely unknown. This qualitative study aimed to explore clinician and caregiver perspectives on service provision for family members of young people (15–25 years) attending a specialist clinic for moderate–severe mood...

article

Malcev completions, LS category, and depth

Yves Félix, Steve Halperin

Boletín de la Sociedad Matemática Mexicana > 2017 > 23 > 1 > 267-288

Let X be a connected topological spaces with finite rational Betti numbers. We denote by G the radical of its fundamental group and by $$(\wedge V,d)$$ ( ∧ V , d ) its minimal Sullivan model. If dim $$\, V^i<\infty $$ V i < ∞ for each $$i\ge 2$$ i ≥ 2 , then the dimension of the rationalization of G is less than or equal to the Lusternik-Schnirelmann category...

article

The ranks of the homotopy groups of odd degree of a finite complex

Yves Félix, Steve Halperin, Jean-Claude Thomas

Journal of Pure and Applied Algebra > 2015 > 219 > 3 > 494-501

Let L be a graded connected Lie algebra of finite type and finite depth (for instance the rational homotopy Lie algebra of a finite simply connected CW complex). Let L(p)={Lpk}k≥1. Then for any prime p, limn⁡log⁡dim⁡L(p)≤nlog⁡dim⁡L≤n=1. In particular for a space X, the Lie algebra LX=π⁎(ΩX)⊗Q and its even dimensional part LX(2) have the same log index.

article

Intensive outreach in youth mental health: Description of a service model for young people who are difficult-to-engage and ‘high-risk’

Carsten Schley, Alessandra Radovini, Steve Halperin, Karen Fletcher

Children and Youth Services Review > 2011 > 33 > 9 > 1506-1514

Intensive Mobile Youth Outreach Services (IMYOS) were developed to provide specialist mental healthcare to the most ‘at risk’ and hardest to engage young people living in the state of Victoria, Australia.The purpose of this paper is to provide a description of the Orygen Youth Health (OYH) IMYOS, specialising in the treatment of 15 to 24year-olds living in the northern and north-western region of...

article

The ranks of the homotopy groups of a space of finite LS category

Yves Felix, Steve Halperin, Jean-Claude Thomas

Expositiones Mathematicae > 2007 > 25 > 1 > 67-76

Let X be a simply connected CW complex with finitely many cells in each degree. The first part of the paper is a report on the different conjectures for the behavior of the sequence rkπi(X). In the second part, we give conditions on the Lusternik–Schnirelmann category of X and on the depth of the Lie algebra π*(ΩX)⊗Q that imply the exponential growth in k of the sequence ∑i=1drkπk+i(X), for some d.

article

An asymptotic formula for the ranks of homotopy groups

Yves Felix, Steve Halperin, Jean-Claude Thomas

Topology and its Applications > 2006 > 153 > 18 > 3430-3436

Let X be a finite simply connected CW complex of dimension n. The loop space homology H∗(ΩX;Q) is the universal enveloping algebra of a graded Lie algebra LX isomorphic with π∗−1(X)⊗Q. Let QX⊂LX be a minimal generating subspace, and set α=lim supilogrkπi(X)i.Theorem: If dimLX=∞ and lim sup(dim(QX)k)1/k<lim supdim(LX)k1/k, then∑i=1n−1rkπk+i(X)=e(α+εk)k,where εk→0 as k→∞. In particular ∑i=1n−1rkπk+i(X)...

article

Lusternik–Schnirelmann category of skeleta

Yves Felix, Steve Halperin, Jean-Claude Thomas

Topology and its Applications > 2002 > 125 > 2 > 357-361

In this paper we make explicit the relationship between the category of a connected CW complex and the category of its skeleta. In particular we prove that if Y is a connected non-contractible CW complex, then catY _k ⩽catY for each k-skeleton Y _k . On the other hand, we prove that cat ₀ (Y)=lim _k→∞ cat ₀ (Y _k ), where cat ₀ denotes the rational...

article

The rational LS category of products and of Poincare duality complexes

Yves Félix, Steve Halperin, Jean-Michel Lemaire

Topology > 1998 > 37 > 4 > 749-756

We give a new characterisation of rational LS category, cat ₀ (X), from which two theorems follow. Theorem 1: cat ₀ (X Y) = cat ₀ (X) + cat ₀ (Y). Theorem 3: If X is a Poincare duality complex, then cat ₀ (X) = e ₀ (X), where e ₀ is Toomer's invariant.

Filter options

Publication date

Set your own date range

Content availability

Available (8)
None (1)

Keywords

Data set

Elsevier (6)
Wiley (2)
Springer (1)

Journal

Topology and its Applications (2)
Boletín de la Sociedad Matemática Mexicana (1)
Child & Family Social Work (1)
Children and Youth Services Review (1)
Clinical Psychologist (1)
Expositiones Mathematicae (1)
Journal of Pure and Applied Algebra (1)
Topology (1)

INFONA - science communication portal

Search results for: Steve Halperin

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options