bluuebunny/crossref_metadata_2025_split huggingface dataset:
Korovkin-type approximation by operators in Riesz spaces via power series method
Authors: Chil Elmiloud , Assili Marwa 
Published: December 2019

Abstract
In this paper we prove an Ozguç, Yurdakadim and Taş version of the Korovkin-type approximation by operators in the sense of the power series method. That is, we try to extend the Korovkin approximation theorems, obtained by Ozguç and Taş in 2016, and Taş and Yurdakadim in 2017, for concrete classes of Banach spaces to the class of Riesz spaces. Some applications are presented.
Slice holomorphic solutions of some directional differential equations with bounded L-index in the same direction
Authors: Bandura Andriy , Skaskiv Oleh , Smolovyk Liana 
Published: December 2019

Abstract
In the paper we investigate slice holomorphic functions F : ℂ
n
→ ℂ having bounded L-index in a direction, i.e. these functions are entire on every slice {z
0 + t
b : t ∈ℂ} for an arbitrary z
0
∈ℂ
n
and for the fixed direction b ∈ℂ
n
\ {0}, and (∃m
0 ∈ ℤ+) (∀m ∈ ℤ+) (∀z ∈ ℂ
n
) the following inequality holds

|

∂

b

m

F
(
z
)

|

m
!

L

m

(
z
)

≤

max

0
≤
k
≤

m

0

|

∂

b

k

F
(
z
)

|

k
!

L

k

(
z
)

,

{{\left| {\partial _{\bf{b}}^mF(z)} \right|} \over {m!{L^m}(z)}} \le \mathop {\max }\limits_{0 \le k \le {m_0}} {{\left| {\partial _{\bf{b}}^kF(z)} \right|} \over {k!{L^k}(z)}},

where L : ℂ
n → ℝ+ is a positive continuous function,

∂

b

F
(
z
)
=

d

d
t

F

(

z
+
t

b

)

|

t
=
0

,

∂

b

p

F
=

∂

b

(

∂

b

p
-
1

F

)

{\partial _{\bf{b}}}F(z) = {d \over {dt}}F\left( {z + t{\bf{b}}} \right){|_{t = 0}},\partial _{\bf{b}}^pF = {\partial _{\bf{b}}}\left( {\partial _{\bf{b}}^{p - 1}F} \right)

for p ≥ 2. Also, we consider index boundedness in the direction of slice holomorphic solutions of some partial differential equations with partial derivatives in the same direction. There are established sufficient conditions providing the boundedness of L-index in the same direction for every slie holomorphic solutions of these equations.
Preparation and characterization of sintered clay ceramic membranes water filters
Authors: Zereffa Enyew Amare , Desalegn Tegene 
Published: December 2019

AbstractMetal oxide ceramic is getting more attention in current times due to their unique pore structures, hydrophilic surfaces, high chemical, thermal and mechanical stabilities which offer avenues for application in water treatment. This paper presents the results of an experimental study on the effects of different ratios of clay, grog, sawdust and bone char on efficiency of ceramic composite water filters. Filter of different designs were developed from clay (50, 60, 70, 75 and 80)|%|, sawdust (15, 25, and 35)|%|, grog (5 and 15)|%|bone char and 5|%|ratios by volume and sintered at temperature of 900°C for 6 hours. The Phase and functional group identification of sintered filter investigated with x-ray diffraction and infrared spectroscopy revealed the presence of mixed phase and hydroxyl functional group on the surface of sintered filter. Field emission scanning electron microscopy (FESEM) revealed the porous nature of the microstructures of the sintered filter elements. The superior ceramic water filter design (C900-50-15-35) with total porosity 35.89±0.04|%|, flow rate 2.05±0.41|%|and the percent E coli, nitrite and fluoride removal efficiency: 99.6±0.40|%|, 81.17±0.22|%|and 96.4±0.42|%|were obtained from this work. Porosity evaluated by BET study for C900-50-15-35 demonstrated an average pore size and surface area of 5|nm|and 7.30|m2/g|, respectively.
A Cross-National Analysis of Forced Population Resettlement in Counterinsurgency Campaigns
Authors: Böhmelt Tobias , Dworschak Christoph , Pilster Ulrich , Walterskirchen Julian 
Published: December 2019

AbstractThis article studies the forcible relocation of large segments of the society in times of war. Theoretically, our work is based on the hearts-and-minds approach for explaining counterinsurgents’ strategies. We link this general framework to two more specific factors: insurgents’ external support and the incumbent’s status as a foreign occupier. The main contribution of our research is given by the cross-country empirical analysis, where we combine data on population displacement and counterinsurgency campaigns after World War II. We show that insurgents’ external support and incumbents’ status as a foreign occupier are among the main factors raising the risk of forced population resettlement. This article is a systematic, quantitative study of forced displacement across a large set of conflicts, and we demonstrate that the mechanisms behind forcible relocation as an indiscriminate strategy follow major trends across insurgencies.
Relevance of the Higher-Order Brand Love Prototype in a Service Context
Authors: Rios Rosa E. , Riquelme Hernan E. , Sinno Abdulaziz 
Published: December 2019

AbstractA third-order composite model of brand love prototype is tested using Partial Least Squares (PLS) in a service consumption business: branded coffee outlets. Notable differences are found between the brand love prototype for products reported in literature and a service. The differences reside in the self-brand integration dimension, long-term relationship, and attitude valence. The self-brand integration dimension appears to carry little weight, compared to all the other dimensions of the brand love prototype, in the service. Consumers purchase products that self-enhance their own image, but for services, the self-brand integration may be more challenging to be perceived as relevant.
Conventional and unconventional monetary policy reaction to uncertainty in advanced economies: evidence from quantile regressions
Authors: Christou Christina , Naraidoo Ruthira , Gupta Rangan 
Published: December 2019

Abstract
This paper investigates how the Federal Reserve (Fed) and the Bank of England, Bank of Japan and the European Central Bank reacted in the aftermath of the financial crisis by making use of both conditional and unconditional interest rate quantiles regressions and data on shadow short rate of interest and a measure of uncertainty. Firstly, the unconditional quantile regression offers some support for increased reaction by the Fed as the ZLB is approached. Secondly, the decreased reaction of the Fed and other monetary policy makers towards uncertainty particularly at lower conditional quantiles of interest rates lends support to expansionary mechanism in place during this time. Hence uncertainty is key to policy reaction, and more so during episodes of crisis.
The term structure of Eurozone peripheral bond yields: an asymmetric regime-switching equilibrium correction approach
Authors: Avdoulas Christos , Bekiros Stelios , Lucey Brian 
Published: December 2019

AbstractSeveral studies have established the predictive power of the yield curve i.e. the difference between long and short-term bond rates and the role of asymmetries in the term structure of bond yields with respect to real economic activity. Using an extensive dataset, comprising 3-month, 1-year, 5-year and 10-year constant maturity Treasury bonds for the Eurozone southern periphery countries – the so-called “PIIGS” – from January 1999 to April 2019, we investigate the links between bond yields of different maturities for the Eurozone southern peripheral countries and we find they co-evolve in line with the predictions of the Expectations Hypothesis theory. We demonstrate the presence of nonlinearities in the term structure, and utilize a multivariate asymmetric two-regime Markov-switching VAR methodology to model them properly. Moreover, we address the economic reasoning behind the introduction of an equilibrium-correction regime-switching approach, hence providing potentially important insights on the behaviour of the entire yield curve. We reveal that the regime shifts are related to the state of the business cycle, particularly in economies in which monetary policy decisions are implemented via changes in short-term rates as a response to deviations of output from equilibrium levels. Our results may have important statistical and economic implications on the behaviour of the term structure of bond yields.
Research on Nozzle Jet Vector Control with Synthetic Jet Technology
Authors: Zhang Binglong , Liu He , Dong Jinzhong 
Published: December 2019

AbstractThe synthetic jet actuator was applied to the nozzle jet vector control by experimental and numerical simulation methods to study fluid thrust vector control in this paper. The nozzle jet produced a steady and continuous deflection under the action of synthetic jet actuators. Through the analysis of the flow structure and control mechanism of the interaction between the synthetic jet and the nozzle jet, it was found that the force formed by the pressure gradient in the nozzle duct, the entrainment and ejection of the synthetic jet to the mainstream, and the momentum synthesis of the vertical synthetic jet were able to cause the deflection of the nozzle jet. The actuator excitation voltage can adjust synthetic jet velocity, which in turn affects the nozzle jet deflection angle.
The description of a new Bruchophagus species (Hymenoptera, Chalcidoidea, Eurytomidae) developing in seeds of Melilotus officinalis (L.) Descr. (Fabaceae) in Iran
Authors: Zerova M.D. , Al-Sendi A. , Fursov V.N. , Adeli-Manesh H. , Sadeghi S.E. , Pirouzi F. 
Published: December 2019

The new species, Bruchophagus ayadi sp.n., is reared from seed pods of Melilotus officinalis (L.) Desr. (Fabaceae) in Iran (Lorestan). The new species is close to B. platypterus (Walk.), but differs by roundish abdomen and very gibbous, almost globular (in lateral view) mesosoma. These species can be also differentiated by some biological features. The host plant of B. platypterus is Lotus corniculatus L., whereas the new species is reared from Melilotus officinalis (L.) Desr. Holotype of Bruchophagus ayadi sp.n. is deposited in the collection of I.I. Schmalhausen Institute of Zoology of National Academy of Sciences of Ukraine (Kyiv).
The first record of Eurytoma сoleopterae Zerova, 1978 (Hymenoptera: Eurytomidae) as larval parasitoid of weevils and jewel beetles (Coleoptera: Curculionidae, Buprestidae) in Turkey and Turkmenistan
Authors: Fursov V.N. , Zerova M.D. , Kodan M. 
Published: December 2019

The parasitic chalcid wasp Eurytoma coleopterae Zerova, 1978 (Hymenoptera: Eurytomidae) is re-described and illustrated. For the first time parasitoid E. coleopterae is reared from the larvae of weevil Metapion sp. (Coleoptera: Curculionidae), developing in seeds of Ruta sp. (Rutaceae) in Turkey. Also for the first time chalcid wasp E. coleopterae was reared from larvae of jewel beetle Meliboeus cyaneus Kiasw. (Coleoptera: Buprestidae), developing in stems of Cousinia polycephala Rupr. (Asteraceae) in Turkmenistan. Re-description of type material, a new data on the distribution, biology, host–parasitoid and host–plant trophical associations are given. Material is deposited at the collection of I.I. Schmalhausen Institute of Zoology of National Academy of Sciences of Ukraine (Kyiv, Ukraine).
Súlyos epilepsziás encephalopathia hátterében azonosított MECP2-gén-mutáció fiúbetegben
Authors: Düh Adrienn , Till Ágnes , Bánfai Zsolt , Hegyi Márta , Melegh Béla , Hadzsiev Kinga 
Published: December 2019

Absztrakt:
A szerzők egy negatív családi anamnézisű, súlyos, neonatalis kezdetű epilepsziás
encephalopathiában szenvedő, jelenleg kétéves fiúgyermek esetét mutatják be. A
terápiarezisztens epilepszia és az igen súlyos fejlődésbeli elmaradás
etiológiáját kiterjedt klinikai vizsgálatokkal sem sikerült tisztázni. Genetikai
okot feltételezve, külföldi genetikai laboratóriumban 128 gént tartalmazó
újgenerációs szekvenálási (NGS-) panelvizsgálatot indikáltak epilepsziás
encephalopathiát okozó betegségek irányában. A vizsgálat egy eddig ismeretlen
hemizigóta misszensz mutációt igazolt a MECP2-génben. A szerzők
az esetbemutatás kapcsán áttekintik a lányokban klasszikusan Rett-szindrómát
okozó, a MECP2-gén mutációi által előidézett idegfejlődési
rendellenességek spektrumát fiúkban. Más, X-hez kötött domináns öröklődésű
betegségekhez hasonlóan sokáig úgy gondolták, hogy a
MECP2-gén-mutációt hordozó fiúmagzatok életképtelenek,
napjainkra azonban ez a nézet megváltozott. A szerzők úgy tudják, hogy betegük
az első magyar fiúgyermek, akinél a MECP2-gén mutációja
igazolódott. Orv Hetil. 2019; 160(51): 2036–2039.
Otosclerosis. 2. rész. Diagnózis
Authors: Liktor Balázs , Hirschberg Andor , ifj Liktor Bálint , Karosi Tamás 
Published: December 2019

Absztrakt:
Az otosclerosis kizárólag az emberi temporalis csontban előforduló
csontanyagcsere-megbetegedés, mely apró, gócszerű csontlaesiókat hoz létre az
oticus kapszulában. A betegség tünetei leginkább a gócok elhelyezkedésétől
függenek. Így, klinikai szempontból, a leginkább releváns a stapestalp
fixációjával járó stapedialis otosclerosis, amely a legtöbbször jelentős fokú
vezetéses hallászavarral jár. Sok esetben már az anamnesztikus adatok
jellegzetességéből, a beteg életkorából és a fizikális vizsgálat semmitmondó
leleteiből következtethetünk a stapesfixáció valószínűségére. Jóllehet
preoperatív diagnózisunkat audiológiai tesztekkel, VEMP-vizsgálattal és
különféle képalkotókkal tovább pontosíthatjuk, 100%-os diagnózist csak a műtét
során eltávolított stapestalpak szövettani verifikálásával nyerhetünk. Orv
Hetil. 2019; 160(51): 2007–2011.
Neurological outcome in newborns with congenital heart disease and seizures
Authors: Aberastury Marina , Agosta Guillermo , Puga Celeste , Vaccarezza Maria M , Maxit Clarisa , Silva Walter H 
Published: December 2019

Background: Newborns with congenital heart disease have a high risk of seizures, associated to developmental delay, cerebral palsy, and epilepsy.In this study we analyzed the etiology of seizures, electroencephalographic findings and outcome of newborns with congenital heart disease and seizures.Methods: We retrospectively identified 29 newborns with congenital heart disease, who presented with at least one seizure during their admission to the Neonatal Intensive Care Unit of the Hospital Italiano.Results: All newborns had structural/metabolic seizures. Median gestational age was 38 weeks (30-40 weeks, four pre-term) and median birth weight was 3100 g. (range: 1200-4375). Neurological exam was normal in seven neonates (24%), fourteen had only one seizure and four developed status epilepticus. The EEGs were abnormal in 21 newborns (72%). Ten showed focal paroxysms, ten showed minimal alterations with low amplitude and one had a burst-suppression pattern.Nine newborns (31%) died, due to hemodynamic decompensation. They all had an abnormal EEG (p=0.027), an abnormal neurological exam (p: 0.05) and four presented status epilepticus. (p=0.0053).At six months, two more newborns died and two had refractory epilepsy. Of the 18 patients, six had a normal neurological exam. These 6 patients, had had a normal neonatal neurological exam before hospital discharge and four had had only one seizure. Of the six newborns, five had a normal EEG (p= 0.03).Conclusions: In this population we observed a high mortality and an adverse neurological outcome. Abnormal EEG, abnormal neurological exam and status epilepticus were significantly related to mortality.
Pilocytic astrocytoma: a clinical study in a single Brazilian institution.
Authors: Vranjac Sergio , Rosemberg Sergio 
Published: December 2019

Purpose: to study the clinical, laboratorial, and therapeutic data of patients with pilocytic astrocytomas, their predictive factors, and to propose a therapeutic strategy. Methods: Retrospective analysis of clinical files of pediatric patients followed between 1984 and 2014 in a single institution. Results: There were 48 patients (22 boys and 26 girls). Age at diagnosis varied from 6 months to 15,2 years (mean: 6,9 years). Mean follow-up was 8,9 years (6 months to 21.5 years). Twenty-five (52%) were cerebellar, 8(17%) hemispheric, 10(21%) hypothalamic-chiasmatic, and 5 (10%) midbrain. Twenty-eight tumors were solid-cystic, 9 solid, 4 cystic, and 7 unknown. Total gross resection was achieved in 17 (35%), partial resection in 27 (56%). Two patients had biopsy only and 2 were not operated on. Adjuvant therapy was performed in 17 patients (9 radiotherapy, 7 chemotherapy and 1 both therapies). Recurrence occurred in 14 patients, 8 of which remained stable after reoperation associated or not to adjuvant therapy. Significant predictor factors were gross total resection and lower age at diagnosis. Conclusions: The epidemiological and clinical data of this cohort of patients do not differ from those from distinct geographical regions. Except the extension of resection and age at diagnosis, all other parameters analyzed failed to show prognostic significance. Albeit biological behavior of residual tumors is unpredictable, most of them remain stable for many years even after a first recurrence. These tumors must be treated cautiously. Chemo and/or radiotherapy should be considered only in those cases with more than one recurrence. Keywords: Pilocytic astrocytoma, pediatric brain tumor, epidemiology, prognostic factors, treatment.
Clinical and Electrophysiological Characteristics of Vincristine Induced Peripheral Neuropathy in Children
Authors: Kava Maina , Walsh Peter , SrinivasJois Ravisha , Cole Catherine , Lewis Barry , Nagarajan Lakshmi 
Published: December 2019

ABSTRACTBackground: Vincristine is a chemotherapeutic agent frequently used in the treatment of childhood cancer. Peripheral neuropathy is an important side effect of Vincristine. We assessed the incidence, severity and type of peripheral neuropathy in children on Vincristine using clinical parameters and nerve conduction studies. Methods: Children with cancer treated with Vincristine were enrolled. Symptoms and signs of motor, sensory and autonomic peripheral neuropathy at baseline and at 3, 6 and 12 month follow up were documented. A modified total neuropathy score grading was undertaken. Nerve conduction studies (NCS) were undertaken and vitamin E levels measured at the time of these assessments.Results: 28 patients were enrolled over 12 months. 93% had evidence of neuropathy clinically and/or electrophysiologically. Weakness, pain and constipation were the most common symptoms and the most common sign was loss of ankle reflexes. The peripheral neuropathy was mild in most cases. Plasma levels of vitamin E remained in the normal range, however they dropped significantly from the baseline value.Conclusions: Peripheral neuropathy assessed clinically and electrophysiologically, occurs in the majority of children on Vincristine treatment. The neuropathy is sensory-motor and generally mild. There was a statistically significant drop in average vitamin E levels during treatment. Keywords: Vincristine, peripheral neuropathy, vitamin E
Three Siblings with Progressive Encephalopathy and Destructive White Matter Lesions
Authors: Franckx Helen , Stouffs Katriens , Vanderhasselt Tim , Seneca Sara , Gheldof Alexander , De Meirleir Linda 
Published: December 2019

Intellectual disability is an important health issue, with a prevalence estimated at 1%. Autosomal genes are increasingly identified as an important cause, although still few of them are known. Most cases are of recessive origin and are found in large consanguineous families in the Middle East. Mutations in the TRAPPC9 gene have been reported in different families and are associated with a nonsyndromic form of intellectual disability, although phenotypic abnormalities such as a specific facial appearance, obesity, hypotonia and consistent brain abnormalities were linked to these mutations. Here, we describe three siblings of consanguineous Algerian parents with a homozygous c.1708C>T, p. Arg570* mutation in the TRAPPC9 gene. Initially a relatively normal development was seen until the age of 12-18 months, with from then on a progressive degradation of their mental and motor state and the presence of convulsions in two of them. This, in combination with progressive white matter lesions seen on repetitive magnetic resonance imaging, suggests that this TRAPPC9 mutation should not only be considered as a form of intellectual disability, but also as a neurodegenerative disease.
Lyme Disease or Multiple Sclerosis? Two cases with overlapping features.
Authors: Kotulska-Jóźwiak Katarzyna , Pacheva Iliyana , Patrova Anna , Jurkiewicz Elżbieta Jurkiewicz , Ivanov Ivan , Kuczyński Dariusz , Geneva Ina 
Published: December 2019

Background, The etiology of multiple sclerosis is unclear and infectious agents have been considered. Borrelia infections can cause an intrathecal inflammatory response with accompanying cerebral and spinal imaging findings.
Cases. Two children with acute or subacute initial neurological presentation, subsequent relapsing course, and MR imaging features suggestive of multiple sclerosis are presented. A history of tick bite or dramatic response to antibiotic treatment supported Lyme disease in the beginning, but requirement of disaese-modifying treatment later in the course supported multiple sclerosis.
Results. These cases carrying features supportive of both multiple sclerosis and Lyme disease caused clinical dilemma and were treated for both disorders. Borrelia-specific IgG index testing before any treatment could have prevented the difficulty in differential diagnosis.
Conclusions. Clinical, imaging and CSF findings of multiple sclerosis and acute or chronic progressive borrelia encephalomyelitis may overlap and testing for Borrelia-specific intrathecal antibody synthesis should not be omitted in endemic areas.
Valproate-induced reversible atrophy and cognitive decline: a case
Authors: Innes Emily Amy , Johnson Alexandra M 
Published: December 2019

Background: Valproate (VPA) has been previously described to cause reversible cerebral atrophy and cognitive decline, but few cases are reported and neuropsychological data is lacking. We report a case of VPA induced encephalopathy in an 11-year-old girl with temporal lobe epilepsy, presenting with impaired cognition and sedation combined with cerebral atrophy.
Methods: Cognitive capacity was assessed using Wechsler Intelligence Scales for Children IV (WISC), non-standardised word lists and visual reproduction. Brain magnetic resonance imaging (MRI) was performed prior to, during and post VPA therapy.
Results: Our patient demonstrated average full-scale intelligence quotient, verbal comprehension, perceptual reasoning and working memory. There was a marked discrepancy in processing speed, which ranked low average (score – 80; 9th percentile). Difficulties with mental abstraction and manipulation were noted. Brain MRI (3T) demonstrated mild generalised parenchymal atrophy. Cessation of VPA resulted in dramatic improvement in clinical symptoms (1 month after cessation) and normalisation of brain MRI (11 months after cessation). Progress neuropsychological testing 13 months after cessation showed marked improvements in processing speed.
Conclusion: This case provides an important reminder of this rare but importantly reversible syndrome with new information supporting the neuropsychological changes involved.