bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hurewicz test sets for generalized separation and reduction
Authors: MÁTRAI TAMÁS 
Published: October 2007

AbstractWe prove a Hurewicz-type theorem for generalized separation: we present a method which allows us to test if for a sequence of Borel sets (Ai)i > ω satisfying $\bigcap_{i <\omega} A_{i} = \phis$ there is a sequence (Bi)i < ω of Π0ξ sets such that $A_{i} \ss B_{i}$ $(i <\omega)$ and $\bigcap_{i <\omega} B_{i} = \phis$ or not. We also prove an analogous result for generalized reduction. The results of the paper are motivated by a Hurewicz-type theorem of A. Louveau and J. Saint Raymond on ordinary separation of analytic sets.
Deficiency and abelianized deficiency of some virtually free groups
Authors: BRIDSON MARTIN R. , TWEEDALE MICHAEL 
Published: October 2007

AbstractLetQmbe the HNN extension ofZ/m×Z/mwhere the stable letter conjugates the first factor to the second. We explore small presentations of the groups Γm,n=Qm*Qn. We show that for certain choices of (m,n), for example (2,3), the group Γm,nhas a relation gap unless it admits a presentation with at most 3 defining relations, and we establish restrictions on the possible form of such a presentation. We then associate to each (m,n) a 3-complex with 16 cells. This 3-complex is a counterexample to theD(2) conjecture if Γm,nhas a relation gap.
Symmetric pairs and associated commuting varieties
Authors: PANYUSHEV DMITRI , YAKIMOVA OKSANA 
Published: October 2007

AbstractLet $\g=\g_0\oplus\g_1$ be a $\mathbb Z_2$-grading of a simple Lie algebra $\g$. The commuting variety associated with such a grading is the variety of pairs of commuting elements from $\g_1$. We study the problem of irreducibility of these varieties. Using invariant-theoretic technique, we present new instances of reducible and irreducible commuting varieties.
The role of algebraic solutions in planar polynomial differential systems
Authors: GIACOMINI HÉCTOR , GINÉ JAUME , GRAU MAITE 
Published: October 2007

AbstractWe study a planar polynomial differential system, given by$\dot{x}=P(x,y)$, $\dot{y}=Q(x,y)$. We consider a function$I(x,y)=\exp\!\{h_2(x) A_1(x,y) \diagup A_0(x,y) \}$ $ h_1(x)\prod_{i=1}^{\ell} (y-g_i(x))^{\alpha_i}$, wheregi(x) are algebraic functions of$x$, $A_1(x,y)=\prod_{k=1}^r (y-a_k(x))$, $A_0(x,y)=\prod_{j=1}^s (y-\tilde{g}_j(x))$withak(x) and$\tilde{g}_j(x)$algebraic functions,A0(x,y) andA1(x,y) do not share any common factor,h2(x) is a rational function,h(x) andh1(x) are functions ofxwith a rational logarithmic derivative and$\alpha_i \in \mathbb{C}$. We show that ifI(x,y) is a first integral or an integrating factor, thenI(x,y) is a Darboux function. A Darboux function is a function of the form$f_1^{\lambda_1} \cdots f_p^{\lambda_p} \exp\{h/f_0\}$, wherefiandhare polynomials in$\mathbb{C}[x,y]$and the λi's are complex numbers. In order to prove this result, we show that ifg(x) is an algebraic particular solution, that is, if there exists an irreducible polynomialf(x,y) such thatf(x,g(x)) ≡ 0, thenf(x,y) = 0 is an invariant algebraic curve of the system. In relation with this fact, we give some characteristics related to particular solutions and functions of the formI(x,y) such as the structure of their cofactor.Moreover, we considerA0(x,y),A1(x,y) andh2(x) as before and a function of the form$\Phi(x,y):= \exp \{h_2(x)\, A_1(x,y)/A_0 (x,y) \}$. We show that if the derivative of Φ(x,y) with respect to the flow is well defined over {(x,y):A0(x,y) = 0} then Φ(x,y) gives rise to an exponential factor. This exponential factor has the form exp {R(x,y)} where$R=h_2 A_1/A_0 + B_1/B_0$and withB1/B0a function of the same form ash2A1/A0. Hence, exp {R(x,y)} factorizes as the product Φ(x,y) Ψ(x,y), for Ψ(x,y): = exp {B1/B0.
Skin infections among Indigenous Australians in an urban setting in Far North Queensland
Authors: VALERY P. C. , WENITONG M. , CLEMENTS V. , SHEEL M. , McMILLAN D. , STIRLING J. , SRIPRAKASH K. S. , BATZLOFF M. , VOHRA R. , McCARTHY J. S. 
Published: October 2007

SUMMARYSkin infections are highly prevalent in many Australian Aboriginal communities. This study aimed to determine the prevalence of group A streptococcus (GAS) andStaphylococcus aureusin skin sores of Indigenous people living in an urban setting. We undertook a cross-sectional study of 173 children and youths attending the Wuchopperen Clinic (Cairns) for treatment of skin infections. Participants were interviewed using a structured questionnaire, and a skin lesion swab obtained. The median age was 5·3 years, with 42% identifying themselves as Torres Strait Islanders and 34% as Aboriginal. Impetigo (65%) was the most frequent diagnosis reported followed by scabies (19%); 79% of the lesions had erythema and 70% had exudate. Of 118 lesions, 114 were positive for pathogenic bacteria, with GAS isolated in 84 cases andS. aureusin 92; both these species were recovered from 63 lesions. Significant diversity ofemm-types of GAS was associated with skin lesions in Indigenous patients (22emm-types identified). Fifteen of the 92S. aureusisolates were suggestive of being community-acquired on the basis of antimicrobial susceptibility profile and nine of these strains were co-cultured from nine lesions. These results have implications for future changes of antibiotic policies for the treatment of skin infections in this population.
Unexpectedly high prevalence of akathisia in cancer patients
Authors: Kawanishi Chiaki , Onishi Hideki , Kato Daiji , Kishida Ikuko , Furuno Taku , Wada Makoto , Hirayasu Yoshio 
Published: October 2007

ABSTRACTObjectives:Complications of neuropsychiatric disorders are often detected in cancer patients. Adjustment disorders, depression, or delirium are common psychiatric disorders in these patients, and drug-induced neuropsychiatric problems are sometimes referred for psychiatric consultation. Prochlorperazine and other antiemetic drugs that are phenothiazine derivates are also reported to cause akathisia due to the blockade of the dopamine receptor in the central nervous system, but the prevalence of akathisia in patients undergoing cancer treatment has not been reported. This study seeks to explore the prevalence of such drug-induced syndromes (e.g., akathisia) in this population.Methods:This present study was a prospective study. The subjects of this study were 483 consecutive patients with cancer who had been referred to the Department of Psychiatry in Kanagawa Prefecture Cancer Center from February 1, 2004, to November 30, 2005. Trained psychiatrists conducted a nonstructured psychiatric interview and neurologic examination to establish psychiatric diagnoses according to DSM-IV and the presence or absence of drug-induced extra pyramidal symptoms. The past and current medications used in their cancer treatment were also examined in detail for an accurate evaluation.Results:A psychiatric diagnosis was made in 420 (87.0%) of the 483 cancer patients examined, and akathisia, a drug-induced movement disorder, was unexpectedly prevalent among the patients; 20 of 420 (4.8%) patients had developed akathisia from an antiemetic drug, prochlorperazine.Significance of results:Diagnosing such adverse drug reactions may be difficult due to complicating factors in cancer treatment, and the inner restlessness observed in akathisia is likely to be regarded as a symptom of a primary psychiatric disorder. The authors suggest that oncologists should optimize the use of antiemetic drugs and be aware of akathisia as a possible complication of cancer treatment.
Bereaved spouses' adjustment after the patients' death in palliative care
Authors: Carlsson Maria E. , Nilsson Ingrid M. 
Published: October 2007

ABSTRACTObjectives:To improve the support to bereaved spouses during the year after the patient's death, a project was started consisting of three visits by a nurse (after 1, 3, and 13 months) with conversations about the patient's death and the spouse's life situation. The aim of this study was to describe the bereaved spouse's situation and adaptation during the first year after the loss.Methods:Spouses of patients cared for by The Advanced Home Care Team (APHCT) in Uppsala, Sweden, were invited to participate in the project. Each participant was encouraged to talk freely about his or her situation, but enough direction was given to ensure that all items listed on a standardized questionnaire were covered.Results:Fifty-one spouses met the inclusion criteria and were invited to participate and 45 accepted. The subjects felt quite healthy but were tired and suffered from sleep disturbance. The grief reactions had initially been high but showed a significant decline from 1 to 13 months (p < .01). Forty-nine percent had experienced postbereavement hallucinations.Significance of results:This study showed that the bereaved spouses felt quite healthy and adjusted quite well to their new life situation, after the patient's death in a palliative care setting. The grief reactions had initially been high but showed a significant decline during the year.
Quorum sensing and quorum quenching in Vibrio harveyi: lessons learned from in vivo work
Authors: Defoirdt Tom , Boon Nico , Sorgeloos Patrick , Verstraete Willy , Bossier Peter 
Published: October 2007

Abstract
Luminescent vibrios, bacteria belonging to the species Vibrio harveyi and closely related species, are important pathogens in aquaculture that can affect almost all types of cultured animals. Due to large-scale use of antibiotics, many luminescent vibrios have acquired (multiple) resistance, which render antibiotic treatments ineffective. One of the alternative strategies that has recently been developed to control infections caused by antibiotic-resistant bacteria is the disruption of quorum sensing, bacterial cell-to-cell communication. The quorum sensing system of V. harveyi has been studied quite intensively in vitro. Recent studies have been directed towards understanding the impact of quorum sensing and quorum sensing disruption on the virulence of luminescent vibrios towards different host organisms in vivo. This mini-review aims at discussing the current knowledge of quorum sensing in luminescent vibrios in vivo. Subsequently, quorum quenching by halogenated furanones is discussed and finally, some directions for further research are presented.
A new computed tomography-based radiographic method to detect early loosening of total wrist implants
Authors: Olivecrona H. , Noz M. E. , Maguire G. Q. , Zeleznik M. P. , Sollerman C. , Olivecrona L. 
Published: October 2007

Background: Diagnosis of loosening of total wrist implants is usually late using routine radiographs. Switching modality to computed tomography (CT) should aid in early diagnosis. Purpose: To propose and evaluate the accuracy of a new CT method for assessing loosening of the carpal component in total wrist arthroplasty. Material and Methods: A protocol encompassing volume registration of paired CT scans of patients with unexplained pain in a prosthetically replaced wrist (used in clinical routine) is presented. Scans are acquired as a dynamic examination under torsional load. Using volume registration, the carpal component of the prosthesis is brought into spatial alignment. After registration, prosthetic loosening is diagnosed by a shift in position of the bones relative to the prosthesis. This study is a preclinical validation of this method using a human cadaverous arm with a cemented total wrist implant and tantalum markers. Seven CT scans of the arm were acquired. The scans were combined into 21 pairs of CT volumes. The carpal component was registered in each scan pair, and the residual mismatch of the surrounding tantalum markers and bone was analyzed both visually and numerically. Results: The detection limit for prosthetic movement was less than 1 mm. Conclusion: The results of this study demonstrate that CT volume registration holds promise to improve detection of movement of the carpal component at an earlier stage than is obtainable with plain radiography.
Three poems
Authors: Ficowski Jerzy , Wandycz Krystyna , Bosley Keith 
Published: October 2007

Jerzy Ficowski, born 1924, has published seven collections of poems in Poland. He has also published stories, essays, and translations from Rumanian ( folk poetry), Romany ( Papusza), Spanish ( Garcia Lorca), and Yiddish. He is now on the editorial board of Zapis. He has written special studies of gipsy folklore and of Bruno Schulz. A major concern is the relation between Christians and Jews, to which his eighth collection of poems, Odczytanie Popiolów ( ‘Reading the Ashes’) bears witness; this collection, banned in Poland, was published earlier this year in England (in Polish). The following poems are taken from Reading the Ashes. The use of the Hebrew name of Jerusalem in the first poem indicates that the journey spoken of is spiritual. The ‘seven words’ of the second poem are both the Seven Words from the Cross and the seven words of a young victim at Belzec extermination camp; the poem reverses the familiar declaration in John's Gospel that the darkness could not contain the light. The third poem is a triumphant affirmation of life: thanks to a dose of Luminal (phenobarbitone) the baby survives to echo God's reply when Moses asked his name.
Palestinian writers in Israel
Authors: al-Qasim Samih , Habibi Emile 
Published: October 2007

Haifa million Palestinian Arabs live in the state of Israel. They have generally received less attention than the 1.2 million Palestinians in the occupied territories — the West Bank, the Gaza Strip, and the Golan Heights — who have lived under Israeli military rule since 1967. Have these forgotten Palestinians' been successfully integrated into the Israeli state? What problems are encountered by Palestinian writers in Israel? Two prominent Palestinian writers recently in London discussed these issues with Roger Hardy. One of them, Samih al-Qasim, is a well-known poet, born in 1939, who lives and works in Haifa. The other, Emile Habibi, born in 1921, is a short-story writer and former member of the Israeli parliament, who in 1974 published a remarkable novel, The Pessoptimist, which looks satirically at the life of an Arab in Israel. (A French translation has been published and an English edition is due to appear in the United States.) Both writers are members of the Israeli Communist Party, whose prestige among Israel's Arabs sometimes puzzles outside observers. In fact, its appeal is less ideological than practical: it is the oldest and best organised non-Zionist party in Israel. Communist publications give many Palestinian writers — communist and non-communist — the chance to appear in print for the first time.
Interview with Claribel Alegría
Authors: Forché Carolyn 
Published: October 2007

‘The impulse to write a political poem is a gut reaction of rage, frustration, impotence and sorrow’ Claribel Alegría, one of Central America's best-known poets, was born in Estelí, Nicaragua in 1924, but she considers herself Salvadorean because she went to live in El Salvador when she was a year old. She went to the United States in 1943 and earned her BA from George Washington University. While not originally a political exile from El Salvador, her opposition to successive regimes there has meant she cannot safely return. She now lives in Deya, Mallorca with her North American husband, Darwin J. Flakoll. Her books of poetry include Anillo de Silencio, Suite, Vigilias, Acuario, Huesped de mi Tiempo, Vía Unica, Aprendizaje, Pagaré a cobrar y ótros poemas, Raíces, and Sobrevivo. A selected poems, Suma y sigue (antología), appeared from Visor Madrid in 1981, and her translations of North American poets, Nuevas voces de Norte-america, appeared from Plaza & Janes, S.A., the same year. In 1978, Claribel Alegría was awarded the Casa de las Americas Prize in Havana, Cuba. This interview was conducted in Mallorca by the young North American poet Carolyn Forché, author of several collections of verse including The Country Between Us and translator of a collection of Claribel Alegría's poems in English, Flowers from the Volcano (University of Pittsburgh). It first appeared in Poetry East. Two of the accompanying poems are translated by Carolyn Forché. The rest have been published by the El Salvador Solidarity Campaign (London), in a small collection of Claribel Alegría's poems, Poesía Viva.
Tatarka: Silenced in Slovakia
Authors: Mlynárik Ján 
Published: October 2007

Dominik Tatarka is Slovakia's best-known novelist; but since 1969 not a word of his work has been published Foreign observers have the impression that, while Czech writers and other intellectuals continue to resist the Soviet-imposed cultural repression, their Slovak fellow-citizens remain, at best, silent or collaborate with the regime which has been in power since the invasion of 1968. Unlike in the Czech-speaking parts of the country, there are not hundreds of silenced writers and scholars in Slovakia, nor did the Charter 77 movement gain any substantial support there, with only five Slovak intellectuals putting their signatures to this human and civil rights document. A leading Slovak historian now living in West Germany, Ján Mlynárik explains the background and describes the difficult life of one of the five — Slovakia's best-known novelist, the 70-year-old Dominik Tatarka, who neither collaborates nor keeps silent. An extract from Tatarka's diary follows his account.
A window on the inside
Authors: Marinick Richard , Munguia Theresa , Chenevert Darlest , Thompson Michael 
Published: October 2007

The USA has the largest prison population in the worlcl More than one million people, about four in every 1,000, are currently locked up. The ratio for African-American men is even higher: 31 per 1,000. According to Prison Conditions in the United States, a recent report by Human Rights Watch in New York, more African American men in their twenties are now in prison, on probation or on parole than are in college or university at any age. Justice Department figures show that the number of prisoners doubled between 1980 and 1990; prison officials expect an increase of another third by the middle of this decade. This seems assured by the 60 mandatory sentencing laws passed by Congress which set heavy minimum, non- negotiable sentences. In addition, within the past year, the Supreme Court has made at least six rulings that will limit the rights and protections of criminal defendants and inmates. Yet this leap in the rate of incarceration has not had any significant effect on the rate of crime. The writers presented here are or were inmates in the Massachusetts correctional system. They are not political prisoners, nor are they all victims of direct censorship. But once prisoners are locked away, they become mute and invisible to those on the outside; their. voices may as well be stilled for all we hear of them. Yet these are people with stories to tell and stories that need to be heard. Their work came out of writing programmes run by New England PEN and Curry College, and was compiled by Monroe Engel, a writer and former senior lecturer in English at Harvard University, who has taught at Norfolk prison for the past three years under the PEN programme. Prison journals have long offered a vehicle for expression and communication among prisoners and with people outside. In Massachusetts, an important and wide- ranging forum is provided by Odyssey, a magazine which originated in Norfolk prison. It was banned from the prison at the end of 1990, and is now published in the community. Luke Janusz, who began editing the magazine while at Norfolk, describes its history, its ambitions, and its importance for inmates on page 17. Subscriptions are available from Odyssey, POBox 14, Dedham, Massachusetts 02026, USA. Nan Levinson
Return history to the people
Authors: Afanasev Yuri 
Published: October 2007

The parallel version of history that emerges from the testimony of eye witnesses is, of necessity, incomplete: many of those who could have contributed were killed by the regime. But it can fill gaps in the versions handed down by the authorities and frequently provides the perfect counterpoint to the myths propagated by the Soviet school. Nor is it above propounding a few dangerous myths of its own. The study of this oral tradition has only recently been authorised and is centred in the Russian State University for the Humanities in the study group for oral history, run by Daria Khoudovia. The most striking thing about the oral history of the Russian people is that it is immeasurably more truthful than official history: by and large, the anecdotes remain far more faithful to the facts than the Bolshevik version.
The global attractivity of the rational difference equation 𝑦_{𝑛}=𝐴+(\frac{𝑦_{𝑛-𝑘}}𝑦_{𝑛-𝑚})^{𝑝}
Authors: Berenhaut Kenneth , Foley John , Stević Stevo 
Published: October 2007

This paper studies the behavior of positive solutions of the recursive equation

y
n

=
A
+

(

y

n
−
k

y

n
−
m

)

p

,

n
=
0
,
1
,
2
,
…
,

\begin{eqnarray} y_n=A+\left (\frac {y_{n-k}}{y_{n-m}}\right )^p,\quad n=0,1,2,\ldots , \nonumber \end{eqnarray}

with

y

−
s

,

y

−
s
+
1

,
…
,

y

−
1

∈
(
0
,
∞
)

y_{-s},y_{-s+1}, \ldots , y_{-1} \in (0, \infty )

and

k
,
m
∈
{
1
,
2
,
3
,
4
,
…
}

k,m \in \{1,2,3,4,\ldots \}

, where

s
=
max
{
k
,
m
}

s=\max \{k,m\}

. We prove that if

g
c
d

(
k
,
m
)
=
1

\mathrm {gcd}(k,m) = 1

, and

p
≤
min
{
1
,
(
A
+
1
)

/

2
}

p\leq \min \{1,(A+1)/2\}

, then

y
n

y_n

tends to

A
+
1

A+1

. This complements several results in the recent literature, including the main result in K. S. Berenhaut, J. D. Foley and S. Stević, The global attractivity of the rational difference equation

y

n

=
1
+

y

n
−
k

y

n
−
m

y_{n}=1+\frac {y_{n-k}}{y_{n-m}}

, Proc. Amer. Math. Soc., 135 (2007) 1133–1140.
Electronically subtracting expression patterns from a mixed cell population
Authors: Gosink Mark M. , Petrie Howard T. , Tsinoremas Nicholas F. 
Published: October 2007

AbstractMotivation: Biological samples frequently contain multiple cell-types that each can play a crucial role in the development and/or regulation of adjacent cells or tissues. The search for biomarkers, or expression patterns of, one cell-type in those samples can be a complex and time-consuming process. Ordinarily, extensive laboratory bench work must be performed to separate the mixed cell population into its subcomponents, such that each can be accurately characterized.Results: We have developed a methodology to electronically subtract gene expression in one or more components of a mixed cell population from a mixture, to reveal the expression patterns of other minor or difficult to isolate components. Examination of simulated data indicates that this procedure can reliably determine the expression patterns in cell-types that contribute as little as 5% of the total expression in a mixed cell population. We re-analyzed microarray expression data from the viral infection of macrophages and from the T-cells of wild type and Foxp3 deletion mice. Using our subtraction methodology, we were able to substantially improve the identification of genes involved in processes of subcomponent portions of these samples.Contact: gosink@scripps.eduSupplementary information: Supplementary data are available at Bioinformatics online.