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Improving the utility of locally differentially private protocols for longitudinal and multidimensional frequency estimates

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Digital Communications and Networks 2024年第2期10卷 369-379页

作者： Héber H.Arcolezi Jean-François Couchot Bechara Al Bouna Xiaokui Xiao Inria andÉcole Polytechnique(IPP) PalaiseauFrance Femto-ST Institute Univ.Bourg.Franche-ComtéUBFCCNRSBelfortFrance TICKET Lab. Antonine University Hadat-BaabdaBaabdaLebanon School of Computing National University of SingaporeSingaporeSingapore

This paper investigates the problem of collecting multidimensional data throughout time(i.e.,longitudinal studies)for the fundamental task of frequency estimation under Local Differential Privacy(LDP)*** to frequency estimation of a single attribute,the multidimensional aspect demands particular attention to the privacy ***,when collecting user statistics longitudinally,privacy progressively ***,the“multiple”settings in combination(i.e.,many attributes and several collections throughout time)impose several challenges,for which this paper proposes the first solution for frequency estimates under *** tackle these issues,we extend the analysis of three state-of-the-art LDP protocols(Generalized Randomized Response–GRR,Optimized Unary Encoding–OUE,and Symmetric Unary Encoding–SUE)for both longitudinal and multidimensional data *** the known literature uses OUE and SUE for two rounds of sanitization(***),i.e.,L-OUE and L-SUE,respectively,we analytically and experimentally show that starting with OUE and then with SUE provides higher data utility(i.e.,L-OSUE).Also,for attributes with small domain sizes,we propose Longitudinal GRR(L-GRR),which provides higher utility than the other protocols based on unary ***,we also propose a new solution named Adaptive LDP for LOngitudinal and Multidimensional FREquency Estimates(ALLOMFREE),which randomly samples a single attribute to be sent with the whole privacy budget and adaptively selects the optimal protocol,i.e.,either L-GRR or *** shown in the results,ALLOMFREE consistently and considerably outperforms the state-of-the-art L-SUE and L-OUE protocols in the quality of the frequency estimates.

关键词： Local differential privacy Discrete distribution estimation Frequency estimation Multidimensional data Longitudinal studies

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Fatty acids derived from oviposition systems guide female black soldier flies(Hermetia illucens)toward egg deposition sites

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Insect Science 2024年第4期31卷 1231-1248页

作者： Patrick Klüber Emna Arous Jeanny Jerschow Marco Fraatz Daniel Bakonyi Martin Rühl Holger Zorn Department Bioresources Fraunhofer Institute for Molecular Biology and Applied EcologyGiessenGermany Institute of Food Chemistry and Food Biotechnology Justus Liebig University GiessenGiessenGermany

The black soldier fly,Hermetia illucens,comes with big promises for industrial purposes since its larvae feed polyphagously on a broad spectrum of organic ***,research focusing on adult flies is scarce,which is inconsistent with their reproductive relevance within the rearing *** particular,directed oviposition is a challenge in artificial ***,decomposing organic matter is commonly used as oviposition substrate,which has extensive potential for improvement in view of the lack of standardization and the risk of microbial ***,we identified three fatty acids and one fatty acid methyl ester derived from the surface of old oviposition sites and targeted to elucidate their effect on preference behavior and oviposition site selection using Y-olfactometry and prepared oviposition sites,*** to tetradecanoic acid attracted gravid females and stimulated oviposition most strongly,while decanoic acid demonstrated a repulsive *** kept in mixed-sex populations were attracted by tetradecanoic acid,resulting in a higher egg mass found in the compound box(3.0–11.4 fold),a≥2.3 fold reduction of nonspecifically deposited eggs,and the highest total egg ***,decanoic and dodecanoic acid caused females to lay a greater proportion of eggs nonspecifically outside both *** data suggest that fatty acids,especially tetradecanoic acid,are important cues for oviposition site selection in black soldier *** order to achieve a directed oviposition behavior,the role of further short-and long-chain fatty acids as attractants should be examined.

关键词： black soldier fly Hermetia illucens fatty acids insects as food and feed oviposition oviposition site selection tetradecanoic acid

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Evolutionary fingerprint, phylogenetic and forest structure of tropical montane Atlantic cloud forests along an elevation gradient

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Journal of Mountain Science 2024年第4期21卷 1259-1271页

作者： Ravi Fernandes MARIANO Vanessa Leite REZENDE Cléber Rodrigo de SOUZA Patrícia Vieira POMPEU Rubens Manoel dos SANTOS Carolina Njaime MENDES Aloysio Souza de MOURA Felipe Santana MACHADO Warley Augusto Caldas CARVALHO Marco Aurélio Leite FONTES Department of Forest Sciences Federal University of LavrasLavras 37200-900Brazil 2Environmental Defence Association of Minas Gerais Belo Horizonte 30360-110Brazil Department of Ecology and Conservation Federal University of LavrasLavras 37200-900Brazil Department of Forest Sciences State University of Mato Grosso do SulAquidauana 79200-000Brazil Agência Zetta Federal University of LavrasLavras 37200-900Brazil. Department of Natural Sciences Federal University of São João del-ReiSão João del-Rei 36307-352Brazil.

Environmental conditions can change markedly over geographical distances along elevation gradients,making them natural laboratories to study the processes that structure *** work aimed to assess the influences of elevation on Tropical Montane Cloud Forest plant communities in the Brazilian Atlantic Forest,a historically neglected *** evaluated the phylogenetic structure,forest structure(tree basal area and tree density)and species richness along an elevation gradient,as well as the evolutionary fingerprints of elevation-success on phylogenetic lineages from the tree *** do so,we assessed nine communities along an elevation gradient from 1210 to 2310 m *** large elevation *** relationships between elevation and phylogenetic structure,forest structure and species richness were investigated through Linear *** occurrence of evolutionary fingerprint on phylogenetic lineages was investigated by quantifying the extent of phylogenetic signal of elevation-success using a genus-level molecular *** results showed decreased species richness at higher elevations and independence between forest structure,phylogenetic structure and *** also verified that there is a phylogenetic signal associated with elevation-success by *** concluded that the elevation is associated with species richness and the occurrence of phylogenetic lineages in the tree communities evaluated in Mantiqueira *** the other hand,elevation is not associated with forest structure or phylogenetic ***,closely related taxa tend to have their higher ecological success in similar ***,we highlight the fragility of the tropical montane cloud forests in the Mantiqueira Range in face of environmental changes(*** warming)due to the occurrence of exclusive phylogenetic lineages evolutionarily adapted to environmental conditions(*** temperature)associated with each elevation range.

关键词： Atlantic Forest Cloud forest Conservation Community ecology Montane forests Phylogenetic diversity Phylogenetic signal

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Modern radiological assessment after neoadjuvant therapy in pancreatic cancer: an overview

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Journal of Pancreatology 2024年第3期7卷 207-211页

作者： Marcus Steingrüber Yousef Moulla Timm Denecke Hans-Jonas Meyer Department of Diagnostic and Interventional Radiology University of LeipzigLeipzigGermany Department of Visceral TransplantThoracic and Vascular SurgeryUniversity of LeipzigLeipzigGermany

This narrative review provides an overview of the current radiological assessment of pancreatic cancer after neoadjuvant *** current literature was searched for evidence of the different radiological quantitative imaging modalities to stage pancreatic *** overview is given in a narrative *** quantitative imaging modalities comprise computed tomography(CT)perfusion,dual-energy CT,magnetic resonance imaging,and fluorodeoxyglucose positron emission tomography(FDG-PET)/*** analysis can be used to further characterize the tumors and to reflect the complex tumor microstructure before and after neoadjuvant *** extension of the tumor and infiltration of the surrounding tissue is of utter importance to decide,whether the neoadjuvant treatment leads to a resectability or *** is increasing evidence of the importance of quantitative imaging modalities to assess treatment response in patients with pancreatic cancer after neoadjuvant *** studies employing these modalities are needed to further investigate the benefit for the patients.

关键词： CT FDG-PET/CT MRI Neoadjuvant treatment Pancreatic cancer

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Innovative earthquake resistant timber-glass buildings

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Natural Science 2013年第8期5卷 63-71页

作者： Bostjan ber Miroslav Premrov Iztok Sustersic Bruno Dujic Contemporary Building Design Celje Slovenia Faculty of Civil Engineering University of Maribor Maribor Slovenia Kager Hisa d.o.o. Ptuj Slovenia

Over the past decade the use of large size glazing has increased with timber structures. Most of the research works done so far have focused on the building physics aspects of the glazing. This paper, however, deals with the seismic behaviour of timber-glass systems. A series of experiments were performed on the shaking table of the IZIIS institute inSkopje,Macedonia. Oneand two-story full scale structures were subjected to a series of ground motions, namely sinus sweep testing, natural and modified ground motion accelerograms. All together 8 different setups were tested in elastic and inelastic behaviour range. Displacements and accelerations were measured in each floor as well as the slipping of walls, uplifting of their corners and the shear deformation of the adhesive between the glass panels and the timber frames. The tested combination of timber-glass walls exhibited a rocking type of behaviour, resulting in a desirable ductile failure of steel hold-downs and not brittle failure of the glazing nor failure of the adhesive. Hence such a combination of glass and timber in wall systems could potentially be used in seismically active areas.

关键词： Timber Glass Seismic Shake Table Testing Experimental Mechanics

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Improvement in corrosion resistance of magnesium coating with cerium treatment

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Rare Metals 2009年第3期28卷 277-283页

作者： Samia Ben Hassen Latifa Bousselmi Patrice berot El Mustafa Rezrazi Ezzeddine Triki Unité de Recherche Corrosion & Protection des Métalliques ENITBP 37Tunis-BelvédèreTunisia Institut UTINAM CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et Recyclage des Eaux CERTEBorj CedriaTunisia

Corrosion protection afforded by a magnesium coating treated in cerium salt solution on steel substrate was investigated using open circuit potential, polarization curves, and electrochemical impedance spectroscopy （EIS） in 0.005 M sodium chloride solution （NaCl）. The morphology of the surface was characterized by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, and X-ray diffraction （XRD）. The cerium treated coating was obtained by immersion in CeCl3 solution. The results showed that the corrosion resistance of the treated magnesium coating was improved. The corrosion potential of the treated coating was found to be nobler than that of the untreated magnesium coating and the corrosion current decreased significantly. Impedance results showed that the cerium treatment increased corrosion protection. The improvement of anti-corrosion properties was attributed to the formation of cerium oxides and hydroxides that gave rise to a physical barrier effect.

关键词： magnesium coating cerium corrosion protection impedance spectroscopy

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XPS characterization and corrosion resistance of cerium-treated magnesium coatings

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Rare Metals 2011年第4期30卷 368-373页

作者： Samia Ben Hassen Latifa Bousselmi Patrice berot El Mustafa Rezrazi Ezzeddine Triki Unité de Recherche Corrosion & Protection des Métalliques ENITBP 37Tunis-BelvédèreTunisie Institut UTINAM CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et Recyclage des Eaux CERTEBorj CedriaTunisie

Cerium conversion treatment was applied on magnesium coatings in a solution containing CeC13. The composition ot the cenum conversion layer on magnesium was investigated using X-ray photoelectron spectroscopy （XPS）, It was revealed that the composition predominately consisted of a three-valent state cerium compound with a relative abundance around 90%. Some of Ce^3＋ was oxidized to Ce^4＋. Electrochemical impedance spectroscopy results revealed that the total impedance of cerium-treated samples increased for a short immersion time in NaC1 solution before coating deteriorating. This deterioration was due to the coating porosity increasing and the breakdown of the conversion layer

关键词： cerium compounds magnesium coatings X-ray photoelectron spectroscopy corrosion resistance

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The effect of climate factors on the size of forest wildfires(case study:Prague-East district,Czech Republic)

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Journal of Forestry Research 2022年第4期33卷 1291-1300页

作者： Zohreh Mohammadi Peter Lohmander Jan Kašpar Roman berčák Jaroslav Holuša Robert Marušák Faculty of Forestry and Wood Sciences Czech University of Life Sciences PragueKamýcká12916500 Praha-SuchdolCzech Republic Optimal Solutions in Cooperation with Linnaeus University UmeaSweden

This paper presents a new approach to identifying the climate variables that influence the size of the area burned by forest *** linear regression was used in combination with nonlinear variable transformations to determine relevant nonlinear forest wildfire size *** from the Prague-East District of the Czech Republic was used for model *** burned forest area was hypothesized as a function of water vapor pressure,air temperature and wind *** speed was added to enhance predictions of the size of forest wildfires,and further improvements to the utility of prediction methods were added to the regression *** results show that if the air temperature increases,it may contain less water and the fuel will become *** size of the burned area then *** the relative humidity in the air increases and the wind speed decreases,the size of the burned area is *** model suggests that changes in the climate factors caused by ongoing climate change could cause significant changes in the size of wildfire in forests.

关键词： Climatic variables Burned forest area Climate change Multiple linear regression

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Crown and leaf traits as predictors of subtropical tree sapling growth rates

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Journal of Plant Ecology 2017年第1期10卷 136-145页

作者： Ying Li Wenzel Kröber Helge Bruelheide Werner Härdtle Goddert von Oheimb Faculty of Sustainability Leuphana University LüneburgInstitute of EcologyScharnhorststraße 1D-21335 LüneburgGermany Martin Luther University Halle Wittenberg Institute of Biology/Geobotany and Botanical GardenAm Kirchtor 1D-06108 HalleGermany German Centre of Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5eD-04103 LeipzigGermany Faculty of Environmental Sciences Technische Universität DresdenInstitute of General Ecology and Environmental ProtectionPienner Straße 7D-01735 TharandtGermany

Aims Growth rates of plants are driven by factors that influence the amount of resources captured and the efficiency of resource *** trees,the amount of light captured and the efficiency of light use strongly depends on crown characteristics and leaf *** theory predicts that both crown and leaf traits affect tree growth,few studies have yet to integrate these two types of traits to explain species-specific growth *** 37 broad-leaved tree species of subtropical forests in SE China,we investigated how interspecific differences in wood volume growth rates were affected by crown and leaf *** tested the hypotheses that(i)larger crown dimensions promote growth rates,(ii)species-specific growth rates are positively related to leaf stomatal conductance,leaf water potential and leaf chemical components,and negatively related to leaf C/N and leaf toughness and(iii)the two sets of traits better explain growth rates in combination than either *** Our study was conducted in a large-scale forest Biodiversity and Ecosystem Functioning experiment in China(BEF-China),located in a mountainous region in Jiangxi *** related 17 functional traits(two crown dimension and three crown structure traits;six physiological and six morphological leaf traits)to the mean annual growth rate of wood volume of young trees of the studied *** between crown and leaf traits were analyzed using principal component *** linear regression analysis was used to test the effect of each trait *** used multiple regression analysis to establish the relationship of growth rate to each set of traits(crown traits,physiological and morphological leaf traits)and to the combination of all types of *** coefficients of determination(R^(2)_(adj))of the best multiple regression models were compared to determine the relative explanatory power of crown and leaf traits and a combination of *** Findings The species-spec

关键词： BEF China crown characteristics physiological leaf traits morphological leaf traits wood volume

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Modification of tenascin-R expression following unilateral labyrinthectomy in rats indicates its possible role in neural plasticity of the vestibular neural circuit

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Neural Regeneration Research 2015年第9期10卷 1463-1470页

作者： Botond Gaal Einar ?rn Jóhannesson Amit Dattani Agnes Magyar Ildikó Wéber Clara Matesz Department of Anatomy Histology and Embryology Faculty of Medicine and Faculty of Dentistry University of Debrecen Department of Pediatric Surgery Faculty of Medicine Clinical Center University of Debrecen MTA-DE Neuroscience Research Group University of Debrecen

We have previously found that unilateral labyrinthectomy is accompanied by modification of hyaluronan and chondroitin sulfate proteoglycan staining in the lateral vestibular nucleus of rats and the time course of subsequent reorganization of extracellular matrix assembly correlates to the restoration of impaired vestibular function. The tenascin-R has repelling effect on pathfinding during axonal growth/regrowth, and thus inhibits neural circuit repair. By using immunohistochemical method, we studied the modification of tenascin-R expression in the superior, medial, lateral, and descending vestibular nuclei of the rat following unilateral labyrin- thectomy. On postoperative day 1, tenascin-R reaction in the perineuronal nets disappeared on the side of labyrinthectomy in the superior, lateral, medial, and rostral part of the descending vestibular nuclei. On survival day 3, the staining intensity of tenascin-R reaction in perineuronal nets recovered on the operated side of the medial vestibular nucleus, whereas it was restored by the time of postoperative day 7 in the superior, lateral and rostral part of the descending vestib- ular nuclei. The staining intensity of tenascin-R reaction remained unchanged in the caudal part of the descending vestibular nucleus bilaterally. Regional differences in the modification of tena- scin-R expression presented here may be associated with different roles of individual vestibular nuclei in the compensatory processes. The decreased expression of the tenascin-R may suggest the extracellular facilitation of plastic modifications in the vestibular neural circuit after lesion of the labyrinthine receptors.

关键词： nerve regeneration extracellular matrix brainstem vestibular system vestibular lesion vestibular compensation perineuronal net neural plasticity neural regeneration

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