904 research outputs found
LA TERRA SIGILLATA ORIENTALE A E B DALLE INDAGINI PRESSO LA SPONDA EST DEL PORTO DI AQUILEIA: ANALISI CRONO-TIPOLOGICA, REPERTI E CONTESTI DI PROVENIENZA
No full textThis study examines the Eastern Sigillata ceramics from ex Fondo Sandrigo, located along the eastern bank of Aquileia’s river port. Excavations (2010–2024) have revealed a long occupation sequence (1st century BCE–7th century CE) and ten chronological phases documenting the site's transformation. Research results presented below aim to enrich the corpus of fine Eastern ceramics in Aquileia. The presence of Eastern Sigillata A and B, despite the competitive local and Italic sigillata production, highlights Aquileia's role in long-distance trade networks. The quantitative and typological analysis identifies 40 specimens, 65% belonging to Eastern Sigillata A and 35% to Eastern Sigillata B. These findings contribute to the understanding of patterns of ceramic circulation connecting the Eastern Mediterranean to northern Adriatic. The study enhances knowledge of Aquileia’s commercial dynamics through an integrated archaeological approach
Zercon sklari Balan
No full textZercon sklari Balan Zercon sklari Balan, 1992: 26. Zercon sklari.— Karaca & Urhan, 2014: 148. Materials examined. 1 female, soil and litter samples under pine trees (Pinus sp.) and oak trees (Quercus sp.), 41 ° 44 ' N, 27 ° 19 ' E, 370 m, vicinity of Yundalan village Dam, Centre of Kırklareli province, March 2014; 12 females and 5 males, soil, litter and moss samples under oak trees (Quercus sp.), 41 ° 29 ' N, 27 ° 12 ' E, 133 m, vicinity of centre of district, Babaeski district (Kırklareli province), April 2014. Female. Mean length of idiosoma 387 (372–401), mean width 294 (277–309) (n = 10). Dorsum. Twenty pairs of setae present on podonotum: j-row with six pairs, z-row with two pairs, s-row with six pairs and r-row with six pairs. Seta j 1 long and finely barbed, remaining setae on podonotum smooth and needle-like. Twenty pairs of setae present on opisthonotum: J-row with six pairs, Z-row with five pairs, S-row with two pairs and R-row with seven pairs. Setae J 1 –J 3, Z 1 –Z 2, S 1 –S 2 and R 1 –R 7 smooth and needle-like. Seta J 4 finely barbed, J 5 and Z 3 apically pilose, J 6 and Z 4 brush-like and finely barbed, all with hyaline ending. Seta Z 5 short and finely barbed. Except seta J 6, no setae reach beyond opisthonotum. Setae S 3 and S 4 absent. Podonotum covered with irregular tile-like pattern. Anterolateral parts covered with tile-like pattern, anteromedial parts covered with finely punctate pattern as opisthonotum. Dorsal cavities distinct, equal in size, axes parallel to that of the body. Pores. Pore po 1 located on line connecting setae j 2 –s 1, po 2 located on line connecting setae j 5 –s 4 (closer to seta s 4), po 3 inside a line connecting s 5 –s 6. Pore Po 1 above the base of seta Z 1, Po 2 located on line connecting setae Z 1 –S 2 (closer to seta S 2), Po 3 located on line connecting setae J 5 –Z 3 and Po 4 below the base of seta Z 4. Venter. Shapes of ventral shields and peritremes, and chaetotaxy are typical for genus Zercon. Two pairs of setae present on ventral side of podonotum. Setae p 1 short, smooth and needle-like, p 2 long, finely plumose, feather-like with hyaline ending. Peritremes slightly bent. Lateral ends of peritremal shield reaching to seta R 1. Adgenital shields present (with two opening valves). Ventrianal shield with nine pairs of setae. Anterior margin of ventrianal shield with four setae and unpaired postanal seta, all short, smooth and needle-like. Male. Mean length of idiosoma 324 (312–334), mean width 233 (227–239) (n = 5). Dorsal idiosoma, ventral idiosoma, shape of setae on idiosoma, sculpture of podonotum and opisthonotum, size and appearance of dorsal cavities, basically similar to those of female. Distribution. Ukraine (Balan, 1992) and Turkey (Karaca & Urhan, 2014). Remarks. Average lengths of opisthonotal setae and distances between setae within longitudinal rows of females and males specimens: see Table 8. Only a single male specimen of this species was recorded from Edirne province previously. We now record and describe female specimens from Turkey for the first time.Published as part of Karaca, Mehmet & Urhan, Raşit, 2016, Five new species of Zercon C. L. Koch, 1836 (Acari: Zerconidae) from northwestern Turkey, pp. 31-59 in Zootaxa 4127 (1) on page 47, DOI: 10.11646/zootaxa.4127.1.2, http://zenodo.org/record/27176
Q-Markov random probability measures and their posterior distributions. Stochastic Process
No full textAbstract In this paper, we use the Markov property introduced in Balan and Ivanoff (2002) for set-indexed processes and we prove that a Markov prior distribution leads to a Markov posterior distribution. In particular, by proving that a neutral to the right prior distribution leads to a neutral to the right posterior distribution, we extend a fundamental result o
Q-Markov random probability measures and their posterior distributions
No full textIn this paper, we use the Markov property introduced in Balan and Ivanoff (J. Theoret. Probab. 15 (2002) 515) for set-indexed processes and we prove that a Markov prior distribution leads to a Markov posterior distribution. In particular, by proving that a neutral to the right prior distribution leads to a neutral to the right posterior distribution, we extend a fundamental result of Doksum (Ann. Probab. 2 (1974) 183) to arbitrary sample spaces.Random probability measure Q-Markov process Transition system Dirichlet process Neutral to the right process
Probing the nature of AFEX-pretreated corn stover derived decomposition products that inhibit cellulase activity
No full textSequential fractionation of AFEX-pretreated corn stover extracts was carried out using ultra-centrifugation, ultra-filtration, and solid phase extraction to isolate various classes of pretreatment products to evaluate their inhibitory effect on cellulases. Ultra-centrifugation removed dark brown precipitates that caused no appreciable enzyme inhibition. Ultra-filtration of ultra-centrifuged AFEX-pretreated corn stover extractives using a 10 kDa molecular weight cutoff (MWCO) membrane removed additional high molecular weight components that accounted for 24–28% of the total observed enzyme inhibition while a 3 kDa MWCO membrane removed 60–65%, suggesting significant inhibition is caused by oligomeric materials. Solid phase extraction (SPE) of AFEX-pretreated corn stover extractives after ultra-centrifugation removed 34–43% of the inhibition; ultra-filtration with a 5 kDa membrane removed 44–56% of the inhibition and when this ultra-filtrate was subjected to SPE a total of 69–70% of the inhibition were removed. Mass spectrometry found several phenolic compounds among the hydrophobic inhibition removed by SPE adsorption.Published version: Humpula, James F., Uppugundla, Nirmal, Vismeh, Ramin, Sousa, Leonardo, Chundawat, Shishir P. S., Jones, A. Daniel, Balan, Venkatesh, Dale, Bruce E. & Cheh, Albert M. (2014). Probing the nature of AFEX-retreated corn stover derived decomposition products that inhibit cellulase activity. Bioresource Technology 152, 38-45. http://dx.doi.org/10.1016/j.biortech.2013.10.08
On Various Levels of Linear Independence for Integer Translates of a Finite Number of Functions
No full textEstimation of residual flexural strength of unidirectional GFRP composite laminates under repeated impact load
No full textThe aim of this study is to investigate the effect of low-velocity multiple impacts at ambient (35C) and elevated
temperature (65C and 85C) on unidirectional glass fiber reinforced plastic (GFRP) composites. Low-velocity repeated
impact tests were conducted using a falling weight tower at a constant velocity of 1.5 m/s. The dominant parameters such
as energy, contact force, and deflection were recorded during multiple impacts. The residual strength of laminates
following repeated impact was evaluated by conducting three-point bending tests with acoustic emission (AE) real
time monitoring. The temperature was revealed to play a key role in the impact response of composite materials,
especially due to the progressive softening of the epoxy matrix. The nature and extent of damage during multiple impacts at ambient and elevated temperatures was investigated using real time AE monitoring: this analysis indicated delamination as a predominant failure mode, whose extent and criticality depended on temperature and number of impact events
Incremental subset construction revisited
No full textDeterminization of finite automata is performed by the \emph{Subset Construction} algorithm (SC). However, some application domains, including monitoring and diagnosis of active systems in artificial intelligence, and model-based mutation testing in software engineering, require determinization to be performed incrementally, in real time. Making incremental determinization by means of SC is bound to poor performances. To this end, an algorithm called Incremental Subset Construction (ISC) was proposed a few years ago. Disturbingly, this algorithm was recently discovered to be incorrect is some instance problems. The incorrect behavior of ISC originates when the redirection of a transition causes a portion of the DFA to be disconnected from the initial state. This paper provides a revisited version of ISC, called Revised Incremental Subset Construction (RISC), operating in either busy or lazy mode. In busy mode, the disconnection is always avoided. In lazy mode, since no check of disconnection is performed, a garbage collector is eventually required
Studying individual magnetic nanoparticles with X-ray PEEM
No full textThe thesis addresses a subject with broad implications in various scientific and technical areas. It presents unique direct observations of the magnetic state of single particles of iron (Fe), cobalt (Co) and nickel (Ni) with nanoscopic dimensions by means of spatially-resolved X-ray magnetic circular dichroism (XMCD). The X-ray photoemission electron microscopy (PEEM) data are complemented with in situ reflection high energy electron diffraction (RHEED) investigations, ex situ scanning electron microscopy (SEM) and atomic force microscopy (AFM) measurements. This approach enabled to correlate the magnetic character of the particles with their individual size. The experimental findings are compared with calculated magnetic anisotropy contributions of the three different types of deposited nanoparticles (NPs). It was found that despite their different atomic structure, the body-centered cubic (bcc) iron and face-centered cubic (fcc) cobalt nanoparticles have a similar behavior and can exist in a state which demonstrates an unexpected ferromagnetic (FM) behavior with sizes down to 8 nm at room temperature (RT), while nickel particles only exhibit the expected superparamagnetic (SPM) behavior. This ferromagnetic state is assigned to an energetically excited, metastable structure which has a remarkably long life time before it decays into the expected superparamagnetic state. Combining PEEM with XMCD measurements allowed for the first time to follow the spontaneous transition from ferromagnetic to superparamagnetic behavior in single nanoparticles.
Detailed calculations of all magnetic anisotropy contributions for different sizes and types of particles indicate that the reported high anisotropy state can be associated with a meta-stable structural state due to the presence of local defects within the NPs, independent of the particle atomic structure and size.
These observations shed new light on the mechanisms which establish the size-dependent evolution of magnetic properties at the nanoscale
A new method for occult blood research of gastric origin: evaluation during endoscopic investigation
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