bluuebunny/crossref_metadata_2025_split huggingface dataset:
Isolated myeloid sarcoma presenting with small bowel obstruction: a case report
Authors: Mizumoto Rie , Tsujie Masanori , Wakasa Tomoko , Kitani Kotaro , Manabe Hironobu , Fukuda Shuichi , Okada Kaoru , Satoi Shumpei , Ishikawa Hajime , Kawasaki Toshihiko , Hanamoto Hitoshi , Yukawa Masao , Inoue Masatoshi 
Published: January 2020

AbstractBackgroundMyeloid sarcoma (MS) is a solid tumor consisting of myeloid blasts or immature myeloid cells, which are unusual outside the bone marrow.Case presentationWe present a rare case of isolated myeloid sarcoma of the small bowel in a 54-year-old man who was admitted to our hospital with repeated symptoms of intestinal obstruction. A small bowel series via an ileus tube revealed severe jejunal obstruction. Computed tomography revealed that the obstruction was likely caused by a jejunal tumor. The patient underwent laparoscopy-assisted partial resection of the jejunum with lymphadenectomy. Histopathological examination of the surgical specimen confirmed that MS had been responsible for the obstruction.ConclusionsPatients with MS require systemic chemotherapy, as do patients with acute myeloid leukemia. Hence, an early, accurate diagnosis is imperative for treating this malignancy. It is also important to list MS in the differential diagnosis of a small bowel tumor, even in nonleukemic patients.
The Effect of Auditing on Promoting Exports: Evidence from Private Firms in Emerging Markets
Authors: Cheng C. S. Agnes , Sun Weihang , Ye Kangtao , Zhang Ning 
Published: January 2020

We investigate the effect of auditing on promoting exports for private firms in emerging markets. Using a sample of private firms from 125 countries between 2006 and 2015, we show that firms that have their financial statements audited have more exports than firms that do not have their financial statements audited. To infer causality, we employ a regression discontinuity design (RDD). Using the discontinuity around the mandatory financial audit threshold, we find that firms slightly above the threshold have more exports than do firms that are slightly below the threshold. We also exploit the countries with exogenous regulation shocks to the mandatory audits. Using the difference-in-differences (DiD) design, we find that firms that are exempted from mandatory audits have less exports subsequent to the regulation change. Further analyses reveal that the effect of auditing is more pronounced in countries with higher audit quality and for firms with limited alternative information. Our findings suggest that the auditing function promotes exports—an important economic consequence for the global economic development. This paper was accepted by Shivaram Rajgopal, accounting.
General formula to design a freeform singlet free of spherical aberration and astigmatism: comment
Authors: Valencia-Estrada J. C. , García-Márquez J. 
Published: January 2020

In their paper [Appl. Opt. 58, 1010
(2019)APOPAI0003-693510.1364/AO.58.001010] González-Acuña
et al. claimed: “an analytical
closed-form formula for the design of freeform lenses free of
spherical aberration and astigmatism.” However, as we show here, their
formula can only be applied when the object and image are both real,
and the image is inversed; additionally, the refractive index in the
object and image media is the same. Here, we present the complete
solution of this particular formula.
Generalized Talbot self-healing and noise mitigation of faulty periodic images
Authors: Romero Cortés Luis , Guillet de Chatellus Hugues , Deville Antonin , Seghilani Mohamed , Hamam Ines , Azaña José 
Published: January 2020

Obtaining high-quality images from physical systems, objects, and processes is fundamental for a myriad of areas of science and technology. However, in many situations, the measured images contain defects and/or are accompanied by noise, degrading the quality of the measurement. Recently, a variant of the well-known Talbot self-imaging effect has been shown to redistribute the energy of a spatially periodic collection of images, obtaining output images with increased energy with respect to the input ones. In this work we experimentally demonstrate that such an energy redistribution method has the unique capabilities of increasing the coherent energy level of a periodic set of images over that of the incoherent noise, even allowing images completely buried under noise to be recovered. We further demonstrate that the process can mitigate potential faults of the periodic image structure, including blocked images, spatial jitter, and coherent noise, offering important enhancements (e.g., in regards to the quality of the recovered individual images) in the self-healing capabilities of Talbot self-imaging.
Laser frequency locking with subnatural linewidth spectroscopy
Authors: Yang Guoqing , Geng Xu-xing , Yu Qi , Liang Shang-qing , Zhu Yifu , Huang Guang-ming , Li Gao-xiang 
Published: January 2020

We demonstrate a simple technique to lock the frequency of a laser to an atomic transition with a new technique of subnatural linewidth spectroscopy. The coupled rubidium system exhibits an enhanced absorption spectrum of the probe beam with a subnatural linewidth. Compared with other techniques with an additional laser, our scheme only utilizes a single laser, which will be locked. The observed spectroscopic linewidth is down to about 3.5 MHz. The laser frequency fluctuation is about 226 kHz after locking on. The demonstrated scheme offers a convenient and low-cost technique for laser frequency stabilization and related precision measurements.
Fiber endface illumination diffuser for endo-cavity photoacoustic imaging
Authors: Luo Hongbo , Yang Guang , Zhu Quing 
Published: January 2020

The laser illumination delivery method is important in designing probes that achieve high imaging quality and deep tissue penetration. Here we present a novel, to the best of our knowledge, fiber diffuser tip using microspheres dispersed within an ultraviolet adhesive to scatter light. This diffuser keeps the skin surface fluence under the maximum permissible exposure, while enabling higher laser energy injection to enhance the photoacoustic (PA) signal generated from the tissue. We compare the light diffusion effects of different microsphere materials, sizes, and concentrations, and find that 10 µm silica microspheres provide the best light scattering with minimal 5% output energy loss. With the Zemax simulation and experimental validation, we show that this fiber diffuser tip is a valuable tool for endo-cavity PA imaging.
3D dark-field confocal microscopy for subsurface defects detection
Authors: Liu Jian , Liu Jing , Liu Chenguang , Wang Yuhang 
Published: January 2020

The three-dimensional (3D) precision measurement of subsurface defects (SSDs) remains a long-term, critical, and urgent challenge in advanced manufacturing technology. In this study, we present a 3D dark-field confocal microscopy technique with complementary illumination and detection apertures to detect the SSD in ultraprecise optical components, which are widely employed at laser fusion facilities. Under an annular illumination generated using a pair of axicons, the specular reflected beam from the surface can be blocked by a diaphragm placed in the detection path, while the scattered beam from the SSD can be effectively collected by the detector. Both surface topography and subsurface defects distribution can be measured simultaneously by this method. We constructed a dark-field confocal microscope that could readily detect the SSD 60 µm beneath the surface in neodymium glass. Furthermore, the 3D volume distributions of the SSD were also reconstructed.
pO2-weighted imaging in vivo by delayed fluorescence of intracellular Protoporphyrin IX
Authors: Scholz Marek , Cao Xu , Gunn Jason R. , Brůža Petr , Pogue Brian 
Published: January 2020

In this Letter, we report on the imaging of tissue oxygen by means of time-gated wide-field lifetime imaging of the microsecond-scale delayed fluorescence from Protoporphyrin IX (PpIX). PpIX is produced endogenously from a clinically used

δ

-aminolevulinic acid (5-ALA) by most cells. The lifetime of delayed fluorescence is lengthened by the absence of oxygen to quench its triplet state. Here, the images of the delayed emission from the human skin and the skin of nude mice were captured after topical application of 5-ALA, using a pulsed 635 nm excitation. Macroscopic lifetime-based images were found to be associated with the tissue oxygenation and obtained with a low light dose (

∼

10

m
J

/

c
m

2

) and “capture-times” of a few seconds.
ANALISIS VEGETASI DI PULAU BINTAN, KEPULAUAN RIAU
Authors: Pratama Bayu Arief , Mirmanto Edi 
Published: January 2020

Ecological study with special attention to vegetation analysis has been done in the Bintan forest area, Riau Archipelago. Based on three sampling plots of 30 × 30 m, there were 73 tree (dbh ≥ 5 cm) species were recorded, belong to 64 genera and 32 families. The density is fairly high (1,485 individuals /ha) with total basal area relatively low (27.71 m2/ha). Its indicates that most of trees are small size. Similarity index among study sites are relatively low (< 25 %), indicates that there is strong relation between habitat and species composition. Out of the 6 most common tree species in the study area, only Dipterocarpus gracillis was dominant in 2 study sites. Overall species diversity is relatively low, which is characteristic of forest vegetation on small islands.
Combating paraben pollution in surface waters with a variety of photocatalyzed systems: Looking for the most efficient technology
Authors: Dominguez Joaquin R. , Gonzalez Teresa , Cuerda-Correa Eduardo M. , Muñoz-Peña Maria J. 
Published: January 2020

AbstractThe constant presence of parabens in natural surface waters has raised a growing concern of the potential long-term toxic effects that parabens may have in wildlife, mainly as endocrine disruptors. The present report describes the results of a study in which different photocatalyzed systems, such as photo-Fenton, Fenton, UV-H2O2, UV-TiO2 and UV-TiO2-H2O2, were applied to the removal of these recalcitrant pollutants in some surface waters, including natural (e.g. rivers) and man-made (e.g. reservoirs and wastewater treatment plants). Degradation of four widely-used parabens (methyl-paraben, ethyl-paraben, propyl-paraben and butyl-paraben) was analyzed. Experimental results reveal that the most efficient method to combat these emerging pollutants was photo-Fenton. When this process was optimized, optimal removal efficiency was attained using doses of H2O2 and Fe(II) equal to 2.92·10−4 mol dm-3 and 1.85·10−5 mol dm-3, respectively. It is also worth noting that the removal rate of these contaminants is slower in natural waters. The results suggest that the photo-Fenton process is promising and maybe an adequate technology for the treatment of these persistent contaminants.
Comparative Effects of Salt and Alkali Stress on Antioxidant System in Cotton (Gossypium Hirsutum L.) Leaves
Authors: Guo Huijuan , Hu Zhiqiang , Zhang Huimin , Min Wei , Hou Zhenan 
Published: January 2020

AbstractThis pot experiment was to evaluate how salts (NaCl, Na2SO4) and alkali (Na2CO3+NaHCO3) affect the physiological and biochemical characteristics during the seedling stage of two cotton cultivars (salt-tolerant, L24; salt-sensitive, X45). Salt and alkali stress reduced seedling emergence rate, relative biomass, and chlorophyll content, however, the REC and MDA content increased. Salt and alkali stress increased markedly superoxide dismutase (SOD) activity. Peroxidase (POD) activity increased first and then decreased as the increase of salt and alkali stress. Catalase (CAT) activity initially increased and then decreased as NaCl stress increased. In addition, the SOD activity, REC, and MDA content was markedly higher in salt stress than that in alkali stress. The proline content of L24 was higher than that of X45 under salt and alkali stress. However, glycine betaine and soluble sugar content of L24 was lower than that of X45 under alkali stress. The REC and MDA content of L24 were lower than those of X45, however, the relative biomass, chlorophyll content, SOD, POD, CAT, and Pro were higher than those of X45. In conclusion, salt tolerant cotton cultivars may possess a superior protection effect by increasing antioxidant enzymes activity under salt and alkali stress.
Mathematical and Coding Lessons Based on Creative Origami Activities
Authors: Budinski Natalija , Lavicza Zsolt , Fenyvesi Kristof , Novta Miroslav 
Published: January 2020

AbstractThis paper considers how creativity and creative activities can be encouraged in regular mathematical classes by combining different teaching approaches and academic disciplines. We combined origami and paper folding with fractals and their mathematical properties as well as with coding in Scratch in order to facilitate learning mathematics and computer science. We conducted a case study experiment in a Serbian school with 15 high school students and applied different strategies for learning profound mathematical and coding concepts such as fractals dimension and recursion. The goal of the study was to employ creative activities and examine students’ activities during this process in regular classrooms and during extracurricular activities. We used Scratch as a programming language, since it is simple enough for students and it focuses on the concept rather than on the content. Real-life situation of folding Dragon curve was used to highlight points that could cause difficulties in the coding process. Classroom observations and interviews revealed that different approaches guided students through their learning processes and gradually made the introduced concepts meaningful and applicable. With the introduction of this approach, students acquired understanding of the concept of coding recursion trough paper folding and applied it in the higher-level programming. In addition, our teaching approach made students enthusiastic, motivated and engaged with the learning of usually difficult subjects.
Effect of North Wall Materials on the Thermal Environment in Chinese Solar Greenhouse (Part A: Experimental Researches)
Authors: Liu Xingan , Li Yiming , Liu Anhua , Yue Xiang , Li Tianlai 
Published: January 2020

Abstract
In order to clarify the dependence relationship between the heat storage & preservation wall and the thermal environment, and to provide data base and theory foundation for the north wall construction of the Chinese solar greenhouse (CSG), the experimental measures has been employed to investigate the distributions of temperature, humidity and heat transfer of three different wall materials (i.e. perforated brick, fine coal ash brick, common clay brick). The dynamic variations of the heat-storage and heat-release processes were identified, and the thermal response characteristics were discussed. The effect of north wall materials on the thermal environment of the solar greenhouse in northern China was revealed. The results indicated that the daily heat-storage and heat-release of fine coal ash brick wall can reach ϕimput
= 34.5~130.6 W·m−2 and ϕoutput
= −24.15~-45 W·m−2, respectively. The daily heat-storage time can reach t = 5~8 h, and the wall temperature at night can be 3~4
∘
C higher than the air temperature. Moreover, the maximum indoor temperature of the fine coal ash brick wall can be maintained at t ≤ 16.7 ≤ 31.1
∘
C, the minimum humidity can be maintained at 29.75~45%. Fortunately, the construction cost is moderate, while the physical properties are obviously better than those of perforated brick and common clay brick in the CSG. The overall thermal performance of fine coal ash brick is the best of the three north wall materials, and it can make the most advantage of the heat-storage and heat-preservation performances of the CSG. As a consequence, the fine coal ash brick wall of the solar greenhouse has good promotion value in northern China and other high latitude, high altitude and long winter regions.
Analysis of risk factors behind keloid
Authors: Manoharan Anbumalar , Rao Sowmya Manasa 
Published: January 2020

<p class="abstract"><strong>Background:</strong> Keloids are firm, thickened, bosselated tumors with fibrous tissue which expands beyond the original injury with common sites being presternum, shoulder, ear lobes. They are more common in Blacks and Hispanics than Caucasians. As there is paucity of studies from South India, this study is done to identify the epidemiological features and analyse the risk factors involved in keloid formation and compare it with previous studies.</p><p class="abstract"><strong>Methods:</strong> 60 subjects were included in the study. Keloid was diagnosed clinically and factors such as the age at presentation, gender, site, size, duration, number and predisposing factors to keloid formation were assessed among them for a period of 18 months.<strong></strong></p><p class="abstract"><strong>Results:</strong> Most of the patients were in the age group of 20-40 years and maximum were females. Majority of patients around 51.67% were affected in chest followed by shoulder (20%). In our study 61.67% patients had keloids of size ≤5 cm and 23 (38.33%) patients had size &gt;5 cm. Most of the patients (41.67%) had keloids of &lt;2 years duration. Maximum number of the patients (68%) had single keloid. 50% of the patients had keloids which occurred after trauma followed by acne (15%), surgery (10%) and herpes zoster (10%), burns (5%). 10% of the patients had spontaneous onset of keloids.</p><p class="abstract"><strong>Conclusions:</strong> The epidemiological features found in this study were similar to the studies conducted in the different parts of the world. Elimination of exacerbating factors will prevent further keloid formation thereby playing a crucial role in the management.</p><p class="abstract"> </p>
Creation Out of Nothing. The Fascist Propaganda in Litzmannstadt
Authors: Ostrowski Marek 
Published: January 2020

The article discusses the activities of Nazi propaganda in Litzmannstadt. It promotes the central notions of the Nazi ideology, such as Volk, land, and leadership in struggle. The purpose of political and military operations was to restore and maintain the ability to culturally dominate other nations. The Nazi state was ethnically, lin guistically and racially homogeneous – it knew not the notion of tolerance towards ethnic minorities. A major characteristic of the propaganda was it its influence on the activities of administrative bodies.
Artistic Inspiration: Initiation of an Artistic Communication
Authors: Władyka-Łuczak Zofia 
Published: January 2020

The article is an attempt to answer the question: When and why is artistic communication initiated?The analysis which leads to the final conclusion was conducted on the basis of an autoethnographic analysis of the process of creating Pomnik Początków Miasta Łodzi (Monument to the Beginnings of Łódź). Its main element was the search for the border between the pre-creative and the creative states during an artist’s work. The analysis indicated that: “Regardless of whether I am working on a sculpture which was commissioned or a sculpture for myself, the processes of triggering precreative and creative states are similar. I always begin work by collecting the material. I work as constructivists would like me to: I study the elements which refer to various differentiation systems. [...] I am aware of the fact that the expected transition from the pre-creative to the creative state can happen at any moment. Today, after many years, I already know that it is not worth evaluating the gathered material – the triggering of the creative state is going to happen either way.” The core of triggering the creative attitude is the development of the skills for observing the reality which surrounds an artist, and even more importantly: the development of the skills of extracting from it that which we are used to calling inspiration in the whole complex process. The line between the pre-creative and creative states emerges in the moment when an artist decides to transfer a fragment of the reality they noticed to the work of art they are creating. The evaluation of a work of art is a completely different issue, which was omitted in this article.
Workplace Violence in Healthcare: A Single-Center Study on Causes, Consequences and Prevention Strategies
Authors: Antão Helena Sofia , Sacadura-Leite Ema , Manzano Maria João , Pinote Sónia , Relvas Rui , Serranheira Florentino , Sousa-Uva António 
Published: January 2020

Introduction: Workplace violence is one of the main risk factors in the professional world. Healthcare workers are at higher risk when compared to other sectors. Our study aimed to characterize physical and verbal violence in a public hospital and to define occupational health prevention and surveillance strategies.Material and Methods: Single center observational cross-sectional study, carried amongst healthcare workers in a public hospital in Lisbon. A qualitative survey was carried out through six in-depth interviews. A quantitative survey was carried through questionnaires delivered to 32 workers. A significance level of 5% was accepted in the assessment of statistical differences. The Mann-Whitney test and the Fisher’s exact test were used to calculate p values.Results: The main results are: (1) 41 violence incidents were reported in the quantitative phase; (2) 5/21 [23.81%] victims notified the incident to the occupational health department; (3) 18/21 [85.71%] victims reported a permanent state of hypervigilance; (4) 22/28 [78.57%] participants self-reported poor or no familiarity with internal reporting procedures; (5) 24/28 [85.71%] participants believed it is possible to minimize workplace violence.Discussion: Workplace violence is favored by unrestricted access to working areas, absence of security guards and police officers or scarce intervention. The low notification rate contributes to organizational lack of action. The state of hypervigilance reported in our study reflects the negative effects of threatening occupational stressors on mental health.Conclusion: Our results show that workplace violence is a relevant risk factor that significantly impacts workers’ health in a noxious manner, deserving a tailored occupational health approach whose priority areas and strategies have been determined.