Poem by S. A. Yesenin “Black Man” in Polish translations and original poetry

The paper examines Polish reception of the poem by Sergei Yesenin “The Black Man”. It attempts to intertextually analyze the work at the level of various kinds of analogies with Polish poetic texts, translated and original. The subject of comparative analysis is the content-formal aspects of translated texts. At the same time, the theory of translation, becoming a part of the comparative methodology, allows one to reach a broader level of generalizations, cultural projections, and socio-historical parallels. The study addresses a number of translations (W. Słobodnik, L. Podhorski-Okołów, W. Broniewski, A. Pomorski), illustrating the degree of freedom of interpretation of a literary text, proportion of congeniality as a special criterion of poetic correspondence. The very process of circulation, transfer, continuous cultural exchange of motives, lyrical situations between the texts of different national literatures and linguistic elements came to be an undeniably important aspect of artistry as a new quality of imagery and the birth of “explosive” poetic meanings. The issue of cultural transfer allows perceiving in individual translation versions mental worlds of the authors refracted in them, life-creating and biographical contexts, as well as historical collisions. In this case literary translation acts as a reliable tool, through which typological and comparative-historical comparisons of poetic worlds are carried out. Analysis of the micro-poetics of texts, motif structure and sensory layer appears more or less convincing on the way of studying reception and a broad intertextual field of selected works.

Laser Patterning a Graphene Layer on a Ceramic Substrate for Sensor Applications

This paper describes a method for patterning the graphene layer and gold electrodes on a ceramic substrate using a Nd:YAG nanosecond fiber laser. The technique enables the processing of both layers and trimming of the sensor parameters. The main aim was to develop a technique for the effective and efficient shaping of both the sensory layer and the metallic electrodes. The laser shaping method is characterized by high speed and very good shape mapping, regardless of the complexity of the processing. Importantly, the technique enables the simultaneous shaping of both the graphene layer and Au electrodes in a direct process that does not require a complex and expensive masking process, and without damaging the ceramic substrate. Our results confirmed the effectiveness of the developed laser technology for shaping a graphene layer and Au electrodes. The ceramic substrate can be used in the construction of various types of sensors operating in a wide temperature range, especially the cryogenic range.

WRD: an approach for evaluating the performance of training program in virtual reality

The paper presents a new approach for evaluating the performance of the training program in virtual reality. The training process is described through three main steps: watching, recalling and doing (WRD). Each step is related to the sensor-motoric layer. The watching is related to the sensory layer, which accumulates the visual information from virtual reality. After then, that visual information will source for recalling the previous experiences followed by the decision-making using the cognitive layer. Finally, the decision-making activates the motor layer in form doing. The WRD approach uses the tests for the measuring of motor and sensory layers. The tests describe typical model of reaction for operator and activate motor and sensory layers as in real professional case. The cognitive layer may be measured with EEG. At the same time, the continuous generation of training cases may help to saturate the knowledge base. For this reason, the fuzzy model based on the generation of training cases was developed. The analysis of experimental data showed the decreasing of time delay by 83%. Moreover, it was shown the decreasing of rejection from horizontal and vertical axes in pixels by 62.7% and decreasing of time expected by 57% for motor tracking. The WRD approach may help to evaluate training program with evaluating sensory, cognitive and motor layer without developing prototype training simulator.

Cyclophosphamide has Long-Term Effects on Proliferation in Olfactory Epithelia

Chemotherapy patients often experience chemosensory changes during and after drug therapy. The chemotherapy drug, cyclophosphamide (CYP), has known cytotoxic effects on sensory and proliferating cells of the taste system. Like the taste system, cells in the olfactory epithelia undergo continuous renewal. Therefore, we asked if a single injection of 75 mg/kg CYP would affect cell proliferation in the anterior dorsomedial region of the main olfactory epithelium (MOE) and the vomeronasal organ (VNO) from 0 to 125 days after injection. Both epithelia showed a decrease in Ki67-labeled cells compared to controls at day 1 and no Ki67+ cells at day 2 postinjection. In the sensory layer of the MOE, cell proliferation began to recover 4 days after CYP injection and by 6 days, the rate of proliferation was significantly greater than controls. Ki67+ cells peaked 30 days postinjection, then declined to control levels at day 45. Similar temporal sequences of initial CYP-induced suppression of cell proliferation followed by elevated rates peaking 30–45 days postinjection were seen in the sustentacular layer of the MOE and all 3 areas (sensory, sustentacular, marginal) of the VNO. CYP affected proliferation in the sensory layer of the MOE more than the sustentacular layer and all 3 areas of the VNO. These findings suggest that chemotherapy involving CYP is capable of affecting cell renewal of the olfactory system and likely contributes to clinical loss of function during and after chemotherapy.

A Flexible Model of Working Memory

Working memory is fundamental to cognition, allowing one to hold information ‘in mind’ and use it to guide behavior. A defining characteristic of working memory is its flexibility: we can hold anything in mind. However, typical models of working memory rely on finely tuned, content-specific, attractors to persistently maintain neural activity and therefore do not allow for the flexibility observed in behavior. Here we present a flexible model of working memory that maintains representations through random recurrent connections between two layers of neurons: a structured ‘sensory’ layer and a randomly connected, unstructured, layer. As the interactions are untuned with respect to the content being stored, the network is able to maintain any arbitrary input. However, this flexibility comes at a cost: the random connections overlap, leading to interference between representations and limiting the memory capacity of the network. Additionally, our model captures several other key behavioral and neurophysiological characteristics of working memory.

The distribution of E-cadherin during Xenopus laevis development

A vast amount of experimental evidence suggests that cell surface molecules involved in cell-to-cell and/or cell-to-substrate interactions participate in the control of basic events in morphogenesis. E-cadherin is a cell adhesion molecule directly implicated in the control of Ca2(+)-dependent interactions between epithelial cells. We report here the patterns of expression of E-cadherin in developmental stages of Xenopus laevis ranging from early embryo to adult using immunofluorescence microscopy. Although its distribution shares some similarities with those of L-CAM in the chicken and E-cadherin/Uvomorulin in the mouse, the distribution of E-cadherin in Xenopus presents several peculiar and unique features. In early stages of Xenopus development, E-cadherin is not expressed. The molecule is first detectable in the ectoderm of late gastrulas (stage 13-13.5 NF). At this time both the external and the sensory layer of the nonneural ectoderm accumulate high levels of E-cadherin while the ectoderm overlying the neural plate and regions of the involuting marginal zone (IMZ) not yet internalized by the movements of gastrulation are E-cadherin-negative. Unlike most other species, endodermal cells express no or very low levels of E-cadherin up to stage 20 NF. Endodermal cells become strongly E-cadherin-positive only when a well-differentiated epithelium forms in the gut. No mesodermal structures are stained during early development. In the placodes, in contrast to other species, E-cadherin disappears very rapidly after placode thickening. During further embryonic development E-cadherin is present in the skin, the gut epithelium, the pancreas, many monostratified epithelia and most glands. Hepatocytes are stained weakly while most other tissues, including the pronephros, are negative. In the mesonephros, the Wolffian duct and some tubules are positive. During metamorphosis a profound restructuring of the body plan takes place under the control of thyroid hormones, which involves the degeneration and subsequent regeneration of several tissues such as the skin and the gut. All newly formed epithelia express high levels of E-cadherin. Surprisingly, degenerating epithelia of both skin and intestine maintain high levels of the protein even after starting to become disorganized and to degenerate. In the adult, staining is strong in the skin, the glands, the lungs, the gut epithelium and the pancreas, weak in the liver and absent from most other tissues. Our results show that the expression of E-cadherin in Xenopus is strongly correlated with the appearance of differentiated epithelia.

Expression sequences and distribution of two primary cell adhesion molecules during embryonic development of Xenopus laevis.

Studies of chicken embryos have demonstrated that cell adhesion molecules are important in embryonic induction and are expressed in defined sequences during embryogenesis and histogenesis. To extend these observations and to provide comparable evidence for heterochronic changes in such sequences during evolution, the local distributions of the neural cell adhesion molecule (N-CAM) and of the liver cell adhesion molecule (L-CAM) were examined in Xenopus laevis embryos by immunohistochemical and biochemical techniques. Because of the technical difficulties presented by the existence of multiple polypeptide forms of CAMs and by autofluorescence of yolk-containing cells, special care was taken in choosing and characterizing antibodies, fluorophores, and embedding procedures. Both N-CAM and L-CAM were found at low levels in pregastrulation embryos. During gastrulation, N-CAM levels increased in the presumptive neural epithelium and decreased in the endoderm, but L-CAM continued to be expressed in all cells including endodermal cells. During neurulation, the level of N-CAM expression in the neural ectoderm increased considerably, while remaining constant in non-neural ectoderm and diminishing in the somites; in the notochord, N-CAM was expressed transiently. Prevalence modulation was also seen at all sites of secondary induction: both CAMs increased in the sensory layer of the ectoderm during condensation of the placodes. During organogenesis, the expression of L-CAM gradually diminished in the nervous system while N-CAM expression remained high. In all other organs examined, the amount of one or the other CAM decreased, so that by stage 50 these two molecules were expressed in non-overlapping territories. Embryonic and adult tissues were compared to search for concordance of CAM expression at later stages. With few exceptions, the tissue distributions of N-CAM and L-CAM were similar in the frog and in the chicken from early times of development. In contrast to previous observations in the chicken and in the mouse, N-CAM expression was found to be high in the adult liver of Xenopus, whereas L-CAM expression was low. In the adult brain, N-CAM was expressed as three components of apparent molecular mass 180, 140, and 120 kD, respectively; in earlier stages of development only the 140-kD component could be detected. In the liver, a single N-CAM band appears at 160 kD, raising the possibility that this band represents an unusual N-CAM polypeptide. L-CAM appeared at all stages as a 124-kD molecule.(ABSTRACT TRUNCATED AT 400 WORDS)

Response Properties of a Sensory Hair Excised from Venus's Flytrap

Multicellular sensory hairs were excised from the leaf of Venus's flytrap, and the sensory cells were identified by a destructive dissection technique. The sensory layer includes a radially symmetrical rosette of 20–30 apparently identical cells, and the sensory cells are organized in a plane normal to the long axis of the sensory hair. The sensory cells were probed with intracellular glass electrodes. The resting membrane potential was about -80 mv, and the response to a mechanical stimulus consisted of a graded response and an "action potential." The action potential appears to be similar to the action potential which propagates over the surface of the leaf. In the absence of stimulation, the upper and lower membranes of a single sensory cell behave in an electrically symmetrical fashion. Upon stimulation, however, the upper and lower membranes become electrically asymmetrical. Limiting values for the response asymmetry were calculated on the hypothesis of an electrical model consistent with the histology of the sensory cells.

Memoirs: The Development of the Olfactory Organ of Kaloula borealis (Barbour) as compared with that of Rana nigromaculata Hallowell

1. The anlage of the olfactory placode of Kaloula borealis arises from the sensory layer of ectoderm as in Eana, but appears slightly later. 2. There is also no such structure as the oro-nasal groove. 3. There are present only the dorsal and middle lumina in the early developmental stage. A separate ventral lumen and the inward projection present in Rana are wanting in Kaloula. 4. The primitive choana opens into the endodermal part of the oral cavity as in Rana. 5. The external naris closes up after the formation of the primitive choana and is formed de novo at the beginning of the metamorphosis. 6. The floor of the middle lumen opens entirely into the oral cavity. The process which synchronizes with the closure of the external naris begins from the end next to the primitive choana and extends anteriorly. This compound opening forms the choana in the adult stage. 7. There are also three embryonic nasal sacs in Kaloula. Their mode of origin and prospective rôle in the formation of the mature nasal cavities are essentially identical with those in Rana. 8. The shrinkage of the nasal organ in metamorphosis is more proounced than in Rana. 9. The lateral appendices in Kaloula and Rana are alike in their manner of formation, change of position, and degeneration. 10. The formation of the median and lateral nasal glands, pharyngeal gland, and Bowman's gland is similar to that found in Rana. 11. There exists a nasal gland, which is not known in Rana. It is designated as the middle nasal gland. 12. The naso-lachrymal duct differentiates under the skin as an epidermal ridge and is subsequently detached. It is initiated at the distal end of the closed entrance canal, but is later connected with its proximal end. When fully differentiated it opens into the latero-posterior part of the cavum medium at its proximal end.