bluuebunny/crossref_metadata_2025 huggingface dataset:
Structural and Morphological Analysis of Solid State Synthesized Pure Lead Titanate and Calcium Doped Lead Titanate Ceramics for Ferroelectric and Piezoelectric Energy Storage Applications
Authors: Sharma Shubham , Dong Xiao Nan , Wei Peng , Long Chen
Published: April 2020

This novel research work addresses the physical properties of Lead titanate (PT), PbTiO3 sample with additives. The modification of this sample was carried out by adding calcium in proportion of 5 to 15mol%. The samples in bulk form were synthesized by utilizing traditional method of solid state synthesis. The properties like structural analysis, and grain size determination were studied for the PbTiO3 sample & for the calcium modified lead titanate (PCT). The phase identification, structural characterizations and microstructural analysis hasanalyzed in this manuscript.
The Reaction Threshold and Damage Characteristic of Typical Explosive under Low Amplitude Loading
Authors: Jiang Xi Bo , Jin Peng Gang , Ren Song Tao
Published: April 2020

To study the reaction threshold and damage characteristic under low amplitude loading, two HMX based explosives were chosen for the study. Low amplitude loading experiment was conducted based on card gap test. By adjusting the thickness of card, the applied pressure on the explosive sample was changed. The reaction situation of the explosive was judged by the witness board and the steel tube. The results show that the explosives, especially the casting molding explosive having the reaction threshold and detonation threshold. The detonation threshold of the casting molding explosive is 4.72~5.28GPa and the reaction threshold is 2.34~2.46GPa. The detonation threshold of the pressed fitting explosive is 2.46~2.72GPa and the reaction threshold is 2.12~2.23GPa.The damage characteristics of samples before and after shock loading were studied by use of CT system. The results of CT show that no macro-damage appear in explosive by pressed fittingaftershock damage, while cavity appear in explosive by casting molding in the position above 7~8mm of the witness board, the cavity’s length is 7~8mm, diameter is 1~2mm.
Effects of Microstructure and Shock Prestrain on the Dynamic Mechanical Behavior of Ti-6Al-4V Alloy
Authors: Zhou Shi Meng , Wang Zhi Wei , Ren Yu
Published: April 2020

Ti–6Al–4V alloy (Ti64) with different microstructures was first preshocked at ~6–13 GPa and then compression reloaded at 4×103s-1 to investigate the effect of microstructure and shock prestrain on the dynamic mechanical behavior of this alloy. The strengthening effect caused by shock prestrain is weaker than that introduced by the uniaxial stress compression during dynamic reloading process regardless of microstructure type and impact stress amplitude. However, the shock-induced enhancement ratio is higher in Ti64 having bimodal microstructures or the lamellar microstructure with wide α-platelets. These mechanical behaviors exhibited by postshock materials are closely related to the shock-induced microstructure evolution. Dislocations more tend to nucleate and interact in large-sized α phases such as equiaxed primary α and wide α-platelets. The generation of high-density micro-defects during the propagation of shock waves results in the improvement of strength but degradation of ductility of Ti64 during dynamic reloading process.
Application of Solid State Joining Technologies in Aerospace Parts
Authors: Lee Ho Sung , Yoon Jong Hoon , Yoo Joon Tae
Published: April 2020

This study presents manufacturing lightweight aerospace components by solid state joining technologies. The advantages of solid state joining are due to the lack of hot cracking from solidification, since there is no liquid phase involved in joining process. This produces a high quality joint as compared to that from conventional fusion welding process. In diffusion bonding process, two different surfaces are matched together at elevated temperature under a low pressure without macroscopic plastic deformation in the interface. In friction stir welding process, the rotating shoulder of the tool generates frictional heat on the surface. As the pin rotates it forces the plastic material to mix mechanically in the vicinity of the pin and produces a heavily deformed microstructure around the pin. In this study, solid state joining processes of diffusion bonding and friction welding, are applied to manufacture several launcher components with lightweight, efficient and cost saving.
Austenite Grain Evolution Mechanism of High Carbon Rail Based on Thermal Technology
Authors: Yuan Jun , Han Zhen Yu , Deng Yong , Yang Da Wei
Published: April 2020

In view of the special requirements of rails to ensure the safe and stable operation of Railways in China, the formation characteristics of austenite grains in high carbon rail are revealed through industrial exploration, the process of industrial rail heating and rolling is simulated, innovative experimental research methods such as different heating and heat treatment are carried out on the actual rails in the laboratory. Transfer characteristics of austenite grain size, microstructures and key properties of high carbon rail during the process are also revealed. The results show that the austenite grain size of industrial produced U75V rail is about 9.0 grade. When the holding temperature is increased from 800 C to 1300 C, the austenite grain size of high carbon rail steel decreases, the austenite grain are gradually coarsened, and the tensile strength increases slightly. The tensile strength is affected by the heating temperature. With the increase of heating temperature, the elongation and impact toughness of high carbon rail decrease. The heating temperature of high carbon rail combined with austenite grain size shows that the heating temperature has a great influence on austenite grain size, and has the most obvious influence on the toughness of high carbon rail.
Investigation of the Structure and Properties of Deformed Semi-Finished Products from Alloys of the Al-REM System Made by the Method of Ingotless Rolling-Extruding
Authors: Bespalov Vadim , Sidelnikov Sergey , Berngardt Viktor , Voroshilov Denis , Yakivyuk Olga , Bermeshev Timofey , Durnopyanov Alexander , Kulishova Elena , Voroshilova Marina
Published: April 2020

The article presents the investigation results of the structure and properties of rods of aluminum alloys containing zirconium, cerium and lanthanum after ingotless rolling-extruding (IRE) and heat treatment. The patterns of changes in the microstructure, mechanical properties, electrical resistivity depending on the chemical composition of the alloys, processed by the IRE method and various modes of rods annealing are shown. A metallographic analysis of the grain structure of the samples in a deformed state and after annealing performed. The temperatures at which the alloy structure remains stable and maintains the level of operational properties revealed. The effect of chemical composition on the heat resistance of deformed semi-finished products represented. The study made it possible to evaluate the level of properties of experimental alloys after processing by the method of ingotless rolling-extruding and various modes of rods annealing.
Who, being in the form of God, did not consider it robbery to be equal with God: Kenosis of leadership
Authors: Mdingi Hlulani
Published: April 2020

Leadership is at the core of Christianity; it operates from the paradigm of God’s revelation to humanity through creation. The creation of the world and the creation of Imago Dei are markers of the service that God has maintained from creation to the fulfilment of soteriology (Gn 1:26, 3 and I Cor 15:42). The early church’s worship of Christ, at least in the Didache, stemmed from the fact that this Hebrew prophet was a servant of God and was YHWH in the flesh. The early teachings of the church were service to the world. This article contends that Christianity faces a crisis because of neglect of the nuclei of Christian theology and faith oriented around the real or physical person of Christ and service to others. The emphasis of this article focuses on kenosis as a prerogative of true Christian faith and leadership. A kenotic model of leadership is service to humanity and the world. The article seeks reflection on the theological importance of kenosis, which interacts with creation and creature. This approach will highlight underlying theology for leadership as it relates to the person of Christ.
Antioxidant Properties and Dominant Bacterial Community of Fermented Rohu (Labeo rohita) Sauce Produced by Enzymatic and Fermentation Method
Authors: Shivanne Gowda Siddegowda Gopalapura , Narayan Bhaskar , Gopal Shubha
Published: April 2020

Sauce was produced from Rohu (Labeo rohita) by enzymatic and fermentatively under conditions optimized by response surface method. Salt (20% w/w) and commercial papain (3% w/w) were employed for enzymatic production; while, salt (25%, w/w), sugar (7.5%, w/w) and lactic culture (10%, w/v; Pediococcus pentosaceus FSBP4-40) were used in case of fermentative production. Total antioxidant activity (as ascorbic acid, µg/ml), 2,2`-diphenyl-1-picryl-hydrazyl (DPPH, %) and 2,2`- azinobis-3-ethylbenzothizoline-6 sulphonate (ABTS; %) scavenging activities of fermented sauce samples were higher at 3441±60, 49.57±1.7 and 99.0±0.3, respectively; as compared to enzyme treated samples which showed 803±13, 28.60±1.1 and 78.4±1.0, for the respective parameters, after 180 days storage at 37°C. Superoxide anion scavenging activity and reducing potential were found significantly higher (P<0.05) in both fermented as well as enzymatically prepared sauces in comparison to control. Fermented sauce exhibited excellent antibacterial property against Listeria monocytogenes ScottA. Bacterial counts such as total plate count and halophile count, after 180 days, were significantly lower (P<0.05) in the fermentatively produced sauce than enzymatically prepared sauce. Pediococcus, Micrococcus, Enterococcus and Staphylococcus were the dominant bacterial genera in fermented sauce. The study emphasizes the role of accelerating fermentation process, either enzymatically or fermentatively, to produce biofunctionally and bacteriologically superior rohu sauce.
A Study on the Verification of Inlet Structural Improvement of Side Stream Typed Low Pressure Membrane Module Using PIV Method
Authors: Lee Minyoung , Yoon Sukmin , Kang Moon-Sun , Park No-Suk
Published: April 2020

Objectives:The purposes of this study are to suggest a method to distribute the flow rate into the overall vessel vertically and evenly by improving the inlet hydraulic structure of the side stream type low pressure membrane module.Methods:For those, particle image velocimetry (PIV) technique was used to measure the evenness of flow rate distribution in both of the existing full scale single baffled inlet structure and the improved membrane module inlet structure (double baffled).Results and Discussion:As a result, it was confirmed that the flow distribution of the double baffled inlet structure is improved in comparison to that of the existing single baffled inlet structure. In the case of double baffled inlet structure, the instantaneous velocity distributions of 3, 4, and 5 seconds showed a velocity distribution close to the mean velocity of 0.03 m/s in the entire flow field. Also, a maximum velocity of 0.06 m/s was about 60% less than that of the single baffled inlet structure case (0.13 m/s). Conclusion:When the horizontal flow was observed, it decreased by about 300%. Those were 0.008 m/s for the double baffled inlet structure and 0.027 m/s for the single baffled, respectively.
Development of Air Supply Control Technology in Sidestream MLE Process by Measuring Conductivity
Authors: Chang Shinyo , Shin Pung Shik , Jeong Yeon-Koo , Choi Young June
Published: April 2020

Objectives : This study aimed to achieve improved process performance and energy saving by developing a technology to control the air supply of an aerobic basin by measuring the conductivity in the anoxic basin.Methods : To verify whether conductivity can be used as an operation indicator of biological treatment, the correlation analysis between water quality factor and conductivity of each process was conducted by dividing into summer (methanol input), winter and autumn periods. An empirical formula was presented by briefly arranging the required air quantity formula, and a quick reference was prepared by putting air supply in the conductivity range sequentially. The performance evaluation was judged based on the removal efficiency of ammonia nitrogen and total inorganic nitrogen, SNR and SDNR, the change of air supply, the stability of the process against inflow change.Results and Discussion : The seasonal correlation coefficients of conductivity and water quality items were calculated in the order of ammonia nitrogen, total inorganic nitrogen, DOC, and phosphate in the range of 0.5267 ~ 0.9115. It was found that the conductivity could be used as an operation indicator of the biological treatment process with a correlation coefficient of 0.5 or more. The regression equations for the conductivity and ammonia nitrogen are secured by season, so it is possible to estimate the ammonia nitrogen through the conductivity. At the end of the aerobic basin DO was 3.4 mg/L, the nitrogen treatment efficiency in winter was the best. The aerobic basin DO can be controlled by the air supply, and it can be seen that it is possible to control the air supply and improve the nitrogen treatment efficiency by directly measuring the conductivity having a high correlation with nitrogen. An empirical formula for estimating the required air volume through conductivity and inflow is presented. A' and (B' + X') are 0.0589 (m3-air/h)/(m3/h)/(μS/cm) and –77.562 (m3-air/h)/(m3/h). The result of automatic control of air supply according to the measured conductivity of anoxic tank during winter season showed that total inorganic nitrogen removal efficiency and SDNR were 8.3% and 0.007 g-N/g-MLSS/d higher than the actual plant conditions, respectively. During the automatic control period, the air supply/inflow average ratio was 36 (m3-air/h)/(m3/h), which could reduce the air supply by 21.7% compared to the actual plant conditions.Conclusions : The air supply can be estimated from the flow rate and conductivity. The air supply control technology of the conductivity-based MLE process will be able to simultaneously improve nitrogen removal efficiency and reduce energy consumption.
Topological characterizations of amenability and congeniality of bases
Authors: López-Permouth Sergio R. , Stanley Benjamin
Published: April 2020

We provide topological interpretations of the recently introduced notions of amenability and congeniality of bases of innite dimensional algebras. In order not to restrict our attention only to the countable dimension case, the uniformity of the topologies involved is analyzed and therefore the pertinent ideas about uniform topological spaces are surveyed.

A basis B over an innite dimensional F-algebra A is called amenable if FB, the direct product indexed by B of copies of the eld F, can be made into an A-module in a natural way. (Mutual) congeniality is a relation that serves to identify cases when different amenable bases yield isomorphic A-modules.

(Not necessarily mutual) congeniality between amenable bases yields an epimorphism of the modules they induce. We prove that this epimorphism is one-to-one only if the congeniality is mutual, thus establishing a precise distinction between the two notions.
Global dust cycle and uncertainty in CMIP5 models
Authors: Wu Chenglai , Lin Zhaohui , Liu Xiaohong
Published: April 2020

Abstract. Dust cycle is an important component of the Earth system and have been implemented into climate models and Earth System Models (ESMs). An assessment of the dust cycle in these models is vital to address the strengths and weaknesses of these models in simulating dust aerosol and its interactions with the Earth system and enhance the future model developments. This study presents a comprehensive evaluation of global dust cycle in 15 models participating in the fifth phase of the Coupled Model Intercomparison Project (CMIP5). The various models are compared with each other and with an aerosol reanalysis as well as station observations of dust deposition and concentrations. The results show that the global dust emission in these models ranges from 735 to 8186 Tg yr−1 and the annual mean dust burden ranges from 2.5 to 41.9 Tg, both of which scatter by a factor of about 10–20. The models generally agree with each other and observations in reproducing the dust belt that extends from North Africa, Middle East, Central and South Asia, to East Asia, although they differ largely in the spatial extent of this dust belt. The models also differ in other dust source regions such as North America and Australia, where the contributions of these sources to global dust emissions vary by a factor of more than 500. We suggest that the coupling of dust emission with dynamic vegetation can enlarge the range of simulated dust emission. For the removal process, all the models estimate that wet deposition is a smaller sink than dry deposition and wet deposition accounts for 12–39 % of total deposition. The models also estimate that most (77–91 %) of dust particles are deposited onto continents and 9–23 % of them are deposited into oceans. A linear relationship between dust burden, lifetime, and fraction of wet deposition to total deposition from these models suggests a general consistency among the models. Compared to the observations, most models reproduce the dust deposition and dust concentrations within a factor of 10 at most stations, but larger biases by more than a factor of 10 are also noted at specific regions and for certain models. These results cast a doubt on the interpretation of the simulations of dust-affected fields in climate models and highlight the need for further improvements of dust cycle especially on dust emission in climate models.
Relative impacts of global changes and regional watershed changes on the inorganic carbon balance of the Chesapeake Bay
Authors: St-Laurent Pierre , Friedrichs Marjorie A. M. , Najjar Raymond G. , Shadwick Elizabeth H. , Tian Hanqin , Yao Yuanzhi , Stets Edward G.
Published: April 2020

Abstract. The Chesapeake Bay is a large coastal-plain estuary that has experienced considerable anthropogenic change over the past century. At the regional scale, land-use change has doubled the nutrient input from rivers and led to an increase in riverine carbon and alkalinity. The Bay has also experienced global changes, including the rise of atmospheric temperature and CO2. Here we seek to understand the relative impact of these changes on the inorganic carbon balance of the Bay between the early 1900's and the early 2000's. We use a linked land-estuarine-ocean modeling system that includes both inorganic and organic carbon and nitrogen cycling. Sensitivity experiments are performed to isolate the effect of changes in: (1) atmospheric CO2, (2) temperature, (3) riverine nitrogen loading and (4) riverine carbon and alkalinity loading. Specifically, we find that over the past century global changes have increased ingassing by roughly the same amount (~30 Gg-C yr−1) as has the increased riverine loadings. While the former is due primarily to increases in atmospheric CO2, the latter results from increased net ecosystem production that enhances ingassing. Interestingly, these increases in ingassing are partially mitigated by increased temperatures and increased riverine carbon and alkalinity inputs, both of which enhance outgassing. Overall, the Bay has evolved over the century to take up more atmospheric CO2 and produce more organic carbon. These results suggest that over the past century, changes in riverine nutrient loads have played an important role in altering coastal carbon budgets, but that ongoing global changes have also substantially affected coastal carbonate chemistry.
Alternation of heterotrophic bacterial and archaeal production along nitrogen and salinity gradients in coastal wetlands
Authors: Batanero Gema L. , Green Andy J. , Amat Juan A. , Vittecoq Marion , Suttle Curtis A. , Reche Isabel
Published: April 2020

Abstract. Coastal wetlands are valuable ecosystems with high biological productivity and diversity, which provide ecosystem services such as a reduction in the inputs of nitrogen into coastal waters, and storage of organic carbon, thus, acting as net carbon sinks. The rise of sea level as a consequence of climatic warming will salinize many coastal wetlands, but there is considerable uncertainty about how salinization will affect microbial communities and biogeochemical processes. We analyzed prokaryotic abundance and heterotrophic bacterial and archaeal production in 112 ponds within nine coastal wetlands from the western Mediterranean coast. We determined the main drivers of prokaryotic abundance and production in these wetlands using generalized linear models (GLMs). The best GLM, including all the coastal wetlands, indicated that the concentration of total dissolved nitrogen (TDN) positively affected the abundance of heterotrophic prokaryotes and heterotrophic archaeal production. In contrast, heterotrophic bacterial production was negatively related to TDN. This negative relationship appeared to be mediated by salinity and virus abundance. Heterotrophic bacterial production declined as salinity, and virus abundance, increased. We observed a switch from heterotrophic bacterial production towards heterotrophic archaeal production as salinity and virus abundance increased. Our results imply that microbial activity will change from bacterial-dominated processes to archaeal-dominated processes along with increases of nitrogen inputs and salinity. However, more studies are required to link the mineralization rates of dissolved nitrogen and organic carbon with specific archaeal taxa, to enable more accurate predictions on future scenarios of wetlands salinization and anthropogenic nitrogen inputs.
Inertial drag and lift forces for coarse grains on rough alluvial beds
Authors: Maniatis Georgios , Hoey Trevor , Hodge Rebecca , Rickenmann Dieter , Badoux Alexandre
Published: April 2020

Abstract. Quantifying the force regime that controls the transport of a single grain during fluvial transport has historically been proven difficult. Inertial Micro Mechanical and Electrical Sensors (MEMS) sensors (sensor-assemblies that mainly comprise micro-accelerometers and gyroscopes) can be applied to this problem using a smart-pebble: a mobile Inertial Measurement Unit (IMU) enclosed in a stone-like assembly that can measure directly the forces of sediment transport (and consequently metrics such as grain velocities, positions, and kinetic energies). Today, twenty years after this idea was introduced in the literature, it is accepted that there is potential in calculating directly inertial single pebble dynamics for short time scales (after consistent calibration and analysis) despite limitations in the accuracy of MEMS sensors that are suitable for this issue. This paper introduces and tests a theoretical framework that connects the IMU measurements with existing force balance equations for sediment grains on a riverbed. IMUs were embedded in two different grain shapes and used in flume experiments in which flow was increased until the grain moved. The data were then processed to calculate the threshold force for entrainment resulting to the statistical approximation of inertial impulse thresholds for both the lift and drag components of grain inertial dynamics. An ellipsoid IMU was then deployed in a series of in situ experiments in a steep stream (Erlenbach, Switzerland). The inertial dynamics provide a direct measurement of the resultant forces on sediment particles which quantifies: (a) the effect of grain shape; and (b) the effect of varied intensity hydraulic forcing on the motion of coarse sediment grains during bed-load transport. Lift impulses exert a significant control on the motion of the ellipsoid across hydraulic regimes and despite the occurrence of higher magnitude and duration drag impulses. The first order statistical generalisation of the results suggests that the transport of the ellipsoid is characterised by no-mobility states and that the majority of mobility states is controlled by lift impulses.
Seasonal transition dates can reveal biases in Arctic sea ice simulations
Authors: Smith Abigail , Jahn Alexandra , Wang Muyin
Published: April 2020

Abstract. Arctic sea ice experiences a dramatic annual cycle, and seasonal ice loss and growth can be characterized by various metrics: melt onset, break-up, opening, freeze onset, freeze-up and closing. By evaluating a range of seasonal sea ice metrics, CMIP6 sea ice simulations can be evaluated in more detail than by using traditional metrics alone, such as sea ice area. We show that models capture the observed asymmetry in seasonal sea ice transitions, with spring ice loss taking about 1.5–2 months longer than fall ice growth. The largest impacts of internal variability are seen in the inflow regions of melt and freeze onset dates, but all metrics show pan-Arctic model spreads exceeding the internal variability. Through climate model evaluation in the context of both observations and internal variability, we show that biases in seasonal transition dates can compensate for other unrealistic aspects of simulated sea ice. In some models, this leads to September sea ice areas in agreement with observations for the wrong reasons.
Mientras camina
Authors: Guevara Chamorro José Abraham
Published: April 2020

Mientras camina, hunde los brazos en el aire. Nada lo detiene, atropella a quien le sale a su paso. Dijo que es de Rivas. — ¡Je, je! La ciudad de los mangos, ¡ je, je! Prosigue su recorrido; reparte golpes con sus brazos al azar. Va en el pasillo de punta a punta, una distancia de diez metros. Lo ha estado haciendo desde las seis de la mañana, ahora que son las doce meridiano, seguirá, pero enfilado, anunciaron la hora de almorzar.Manuel, alto, de tez azulada, brilla conel sudor a cuesta, sus extremidades largas le ahorran distancias. Julio Villachica abandona la plazoleta del patio central. El periplo de las regaderas al patio,es su deleite apenas se levanta. Largo tiempo pasa expuesto a los rayos del sol, su cuerpo parece el de un marinero, con su dorada piel. Julio, a él nadie acá le conoce la voz, y no es que sea sordomudo, porque oye, más cuando anuncian la hora de las comidas. El tiburón, así le dicen, un descuido de un comensal, y Julio lo deja sin su alimento.
Si yo fuera mayo: adiós al poeta Carlos Rigby Moses
Authors: Jaentschke Marcel
Published: April 2020

Este texto es una reseña biográfica y artística del poeta costeño Carlos Rigby Moses. Señala no solo sus primeros pasos en los círculos literarios del país, sino también las distintas actividades artísticas y políticas de este polifacético poeta caribeño: su afición a la música y al trombón, su participación y compromiso revolucionarios y el importante papel vinculante entre la cultura caribeña y la del Pacífico de Nicaragua. Nos conduce además por un recorrido temático de sus mejores poemas y nos da a conocer las actividades y relaciones que este gran poeta tuvo con los principales literatos y artistas de Nicaragua. Acompaña a este artículo un pronunciamiento del Centro Nicaragüense de Escritores y poemas de Carlos Rigby.
Use of Hardwood Species (Robinia pseudoaccacia from Short-rotation Plantations as Raw Material in Particleboards
Authors: Tayo J. Lawrence Tene , Achale Achale Travolta , Euring Markus
Published: April 2020

The problem of climate change, coupled to the propagation of wood diseases (bark beetles for example), is leading to a shortage in softwood supply for the particleboard industries. Furthermore, the recent changes in the German forest policies which promote the conversion of coniferous forest into mixed stands are likely to enhance this phenomenon. There is, therefore, a growing need for research on possibilities of substituting the softwood with hardwood and other alternative material. For the first time, young six to seven years old Black locust (Robinia pseudoaccacia) stems from a short-rotation plantation were used at a laboratory scale with the objective of assessing the suitability of particleboard production. Four different variants were produced using different resin types: UF K350, UF K340, albumin, and PMDI, with a target density and thickness of 650 kg/m3 and 20 mm respectively for each board. The boards were tested regarding their mechanical (modulus of rupture, modulus of elasticity and internal bonding), physical (water absorption and thickness swelling) properties according to the European standard (EN 310, EN 317 and EN 319), and their formaldehyde content and emission following the EN 120 and EN 717. Industrial particles were used as reference material for the purpose of comparison. Promising bending strength was obtained with UF resins-bonded boards. The modulus of elasticity of all four variants fulfilled the EN 2003 requirements. The internal bond of the UF resins-bonded boards also met the general product standard, with values above 0.35 N/mm2. The bending strength and the internal bonding strength properties of the UF-bonded boards were superior to that of the reference boards produced with the industrial particles. Based on these results, black locust is a potential substitute for softwood in particleboard production and can be used in the industry as alternative raw material for panel production.
Een verbod op wraakporno
Authors: Berndsen M. (Michael)
Published: April 2020

Een verbod op wraakporno

Op 1 januari 2020 is een verbod op misbruik van seksueel beeldmateriaal in werking getreden. Het nieuwe artikel 139h Sr verbiedt het zonder toestemming vervaardigen van seksueel beeldmateriaal, het beschikken over zulk materiaal en het openbaar maken ervan. Bij het wetsvoorstel werden vanuit het parlement en de strafrechtketen de nodige kanttekeningen geplaatst. Ondanks amendementen die de strafbepaling wezenlijk hebben veranderd, is niet aan alle kritiekpunten uit de parlementaire behandeling tegemoetgekomen. In dit artikel wordt artikel 139h kritisch beschouwd, waarbij onder meer de afbakening van de bestanddelen centraal staat (lex certa). Eerst wordt kort stilgestaan bij de aanleiding voor de wetswijziging en de parlementaire behandeling ervan. Vervolgens staat het wetsartikel zelf centraal. Daarna worden enkele knelpunten van deze strafbaarstelling besproken.
Analysis of disease free survival in cutaneous melanoma patients with sentinel lymph node biopsy
Authors: Łobaziewicz Wojciech , Szloch Joanna , Wajda Justyna , Legkiy Oleksandr , Marczyk Elżbieta , Wysocki Wojciech
Published: April 2020

Introduction: Skin melanoma is estimated for 2% of malignant neoplasms occurring in humans. It is characterized by a high
level of malignancy and low sensitivity to cytostatic drugs. The incidence of skin melanoma increases in Poland. Lymphatic
system is the most common route of dissemination of this neoplasm. The appearance of a sentinel node biopsy technique
has made it possible to identify patients with a regionally advanced disease. It is a minimally invasive method with a small
percentage of complications.
Aim: Analysis of disease free survival (DFS) in cutaneous melanoma patients with sentinel lymph node biopsy.
Material and methods: The analysis included 222 patients with cutaneous melanoma treated in the Department of
Oncological Surgery in 2010–2015, who underwent a sentinel node biopsy. The study group consisted of 136 women and 86
men, the average age of patients was 59 years. Patients were qualified for sentinel node biopsy based on clinical evaluation
and ultrasound of regional lymph nodes. The average follow-up was 25.1 months. About 2 hours before surgery, patients
received the radioisotope, then lymphoscintigraphy SPECT was performed. Additionally, they got the Patent Blue dye in the
operating room.
Results: The sentinel node was identified in 217 patients (98%), and the average sentinel sentinel nodes were 2.25. 27 patients
(12%) had the metastasis in sentinel nodes. In this group, the duration of asymptomatic survival was significantly shorter.
Sentinel node status and age of the patient were independent factors affecting the prognosis of disease free survival.
Conclusions: Sentinel node biopsy is a precise method to identify patients with skin melanoma who have metastasis to
regional lymph nodes and the most important prognostic factor.
EVALUATION OF THE OPERATIONAL WEAR OF THE SANDVIK
CV117 CENTRIFUGAL CRUSHER
Authors: GRYGIER Dominika
Published: April 2020

The purpose of the study described in the work was to evaluate the operating wear of the SANDVIK CV117
centrifugal crusher working in the Melaphyre mine in Grzędy. The research was carried out on work elements,
such as the lining assembly, rotor tips, shredder hammers, the directional bushing, and the distributor divider.
All components had direct contact with the aggregate, and their operating time was about 1150 hours. The
studies included a mine full scale observation, macroscopic analysis of the elements, and an assessment of the
impact of exploitation on selected structural properties of the elements material. On the basis of the carried
out analyses, it was concluded that the major problem faced by all the tested components is the simultaneous
interaction of high friction and impact forces resulting from the kinetic energy of the accelerated grains of the
material acquired from the rotor during operation of the crusher.
THE INFLUENCE OF KINEMATIC CONDITION
AND LUBRICANT PROPERTIES ON FRICTION IN COMPLEX
SLIDE–ROLL MOTION
Authors: KOWALEWSKI Piotr , PASZKOWSKI Maciej
Published: April 2020

The paper presents the results of preliminary studies into the influence of selected lubricants (greases) and
the variable temperature of the friction joint on the value of friction during complex slide-roll motion. The
experiment was carried out for three different types of lubricants: bentonite grease (Benterm 2), lithium
grease (GREASEN ŁT4S2), and calcium grease with the addition of graphite (GREASEN GRAFIT) at
different temperatures. Tribological investigations were carried out in a roller-plate system at a wide range
of plate dislocation velocities and at a constant slip rate; rheological investigations consisted in determining
the changes in shear stress as a function of shear time at constant average shear velocity of 50 mm/s. The
results showed a significant influence of kinematic conditions on the value of friction. Four different cases
of lubricant flow during friction were identified. The least resistance to motion was found when the lubricant
was applied in the same direction along the surface of the roller and plate. It has been shown that the greatest
influence of the kinematics of working elements on friction occurs at low temperatures, i.e. at -10°C. This
phenomenon is closely related to the rheological properties of the lubricant. It was also found that the lubricant
thickened with bentonite is the most susceptible to kinematic changes of the friction joint.
Correlações entre confiança e comportamentos de cidadania organizacional: apontamentos e reflexões para gestores públicos de um município de Minas Gerais
Authors: Silva Wagner Ferraz Coelho da , Paiva Wanderléia Da Consolação , Silva Helder Antônio da
Published: April 2020

This quantitative approach study aimed to investigate the influence of dimensions of trust over expressions of organizational citizenship behaviors (OCBs) in the total sample of civil servants from two public management units in a city in Minas Gerais. Data collection was held by applying a sociodemographic survey, the Behavioral Trust Inventory (BTI), the Public Relations Relationship Measurement Scale (PR-RMS) and the Behavioral Intentions of Organizational Citizenship Scale (EICCOrg) in a sample of 81 civil servants. Data was treated using the Statistical Package for Social Sciences – SPSS version 22. Results confirmed the existence of a positive relation between the dimensions of trust and OCB both for the total sample and for the subsamples. The existence of peculiarities conditioning both the correlations and the explanatory power of trust variables was found in the total sample and subsamples of Health and Education sectors. This work expects to contribute to public managers so that they can develop actions that enhance the levels of trust and promote more cooperative environments with OCBs manifestations, favoring, therefore, the organizational climate and guaranteeing the services’ users are satisfied.
Humor no trabalho: um estudo sobre a relação entre estilos de humor, satisfação com a chefia e desempenho individual no trabalho
Authors: Souza Ariana Marchezi de , Araujo Bruno Felix von Borell de , Andrade Allana Matos de , Cerqueira Alexandre Dos Santos
Published: April 2020

This research investigated the relation among the humor styles, the employees satisfaction with their leader, and job performance of employees, through a quantitative study. In order to measure the constructs, two questionnaires, validated in previous studies, were used: The Humor Styles Questionnaire from Martin et al. (2003) and the Job Satisfaction Scale from Siqueira (1995). The score for individual performance was obtained from an instrument of assessment called “assessment 360º” used by the company studied. 234 valid answers were obtained and the relation among the variables was studied through the Structural Equation Modeling Method, with PLS estimation (Partial Least Squares – Path Modeling). Were identified significant positive relations among the positive styles of humor (affiliative and self-enhancing) and the employees satisfaction with their leader, and between satisfaction with their leader and job performance. On the other side, significant negative relations were verified among negative styles (aggressive and self-defeating) and employees satisfaction with their leader, been an aggressive humor responsible for 16,81% of dissatisfaction with their leader. This results suggest that organizations may benefit from the selection of leaders with the proper humor styles to reach specific behavior and organizational results.
Onde esbarra a legitimação das compras públicas sustentáveis: uma análise da percepção de agentes de contratações públicas sobre as compras sustentáveis
Authors: Euflausino Mariana Aparecida , Mello Gilmar Ribeiro de
Published: April 2020

The state has its purchasing power evidenced. Therefore, by using it strategically, it can influence the market, creating a demand for sustainable goods and services, through the inclusion of sustainable criteria in their purchasing and contracting process. On the other hand, the purchasing process has the action of public contracting agents as decisive element for the application of this process. Thus, it is relevant to know the perception of the agents on the subject, in view of possible obstacles to its implementation, even though the process is legitimized by State regulations. Therefore, the objective of this study was to analyze the perception of public contracting agents regarding sustainable public procurements and their application, by adopting a descriptive character with quantitative approach. The data were collected during the 2nd International Summit on Sustainable Public Contracting, held in Brasília, DF. The sample consisted of 77 public servants. The analysis used descriptive statistics and cluster analysis. The results indicate the possibility of inefficient training and qualification of the agents, as well as the recognition by the agents that the cultural factor is the main obstacle for the application of sustainable public procurements.
Experiências do processo de consumo e o experienciar da felicidade
Authors: Gerhard Felipe , Pedrosa Juliana Melo , Mota Márcio De Oliveira , Freitas Ana Augusta Ferreira de
Published: April 2020

Some studies have already analyzed what makes individuals achieve happiness. In the consumer behavior perspective, experiential consumption, which refers to the interaction between the consumer and the product or service during the purchase or consumption, is more closely related to the welfare and happiness than material consumption – the later related to good’s possession. However, there have been few studies analyzing the relationship between shopping or consumption experiences and happiness. In this sense, the general objective of this paper is to analyze the happiness in the experiences of purchase and consumption. In order to achieve that, two quantitative studies were conducted based on a survey and an experimental design. Confirmatory Factor Analysis (CFA), Structural Equation Modeling (SEM) and ANOVA were used to analyze data. Results indicate that the hedonic values drive the individual experience of purchasing and consuming towards happiness. In addition, they show that extraordinary experiences lead the individual to higher levels of happiness than ordinary ones.
Os Portos do Arco Norte e a cadeia de exportação de carne bovina congelada: gargalos e ganhos econômicos
Authors: Scotton Bruna , Silva Nathan Gomes da , Rocha Fernando Vinícius da , Caixeta Filho José Vicente
Published: April 2020

Consumer demand for consistently high quality meats has exposed a series of problems in the Brazilian frozen beef agro-industrial logistics chain arising from a lack of adequate infrastructure to cope with export flows. Based on interviews with the sector’s agents and on a comparative analysis of transportation costs, this paper aims to identify and evaluate infrastructure bottlenecks that affect the Brazilian frozen beef logistics chain and the economic gains that could be achieved by directing more frozen beef exports through the country’s Northern Arc ports. Among the results obtained from analyzes of frozen beef export flows from the state of Mato Grosso, the Brazilian state with the greatest number of plants that process beef for export, the use of Northern Arc ports can bring road transportation cost savings of up to 43% for some localities. It was also found that the lack of maritime shipping capacity, whether from restricted port capacity or infrequent ship departures, is one of the main logistical problems impeding the flow of frozen beef from ports inBrazil’s north.
Os dois lados da mesma moeda: identificando os paradoxos da tecnologia no consumo online dos brasileiros
Authors: Dias Guerra Disconzi Claudia Maria , Benedetti Corso Kathiane , Valim Bandeira Marina
Published: April 2020

The possibility of buying at any time of the day, researching prices and finding varied products are some of the advantages informed by online consumers. Despite the benefits, some disadvantages are also cited by these consumers, such as the impossibility of product experimentation, delay in delivery, difficulty in accessing websites and lack of security. With this, the possibility of paradoxical behavior among this type of consumer is verified. Therefore, this work aims to verify the presence of technology paradoxes in online consumer behavior. This is a descriptive-exploratory research, with a quantitative approach and a survey research method. A questionnaire was elaborated aiming to collect information regarding the profile of the online consumers interviewed and the characteristics of the purchase process, besides containing 28 statements referring to the 14 paradoxes of technology adapted from national surveys for consumption through the internet. A total of 263 respondents were obtained, where two pairs of paradoxes were present: Assimilation / Isolation and Planning / Improvisation.
The challenges of creating sustainable competitive advantage in large B2B multidivisional corporations
Authors: Koelle Isis Cassia Vannucci de Oliveira , Bueno Cristiane De Paula , Carvalho Daniel Estima de , Guimaraes Leandro Fraga
Published: April 2020

It addresses the challenges that large multi-divisional B2B corporations face each day to take advantage of their corporate strategy and ensure sustainable competitive advantages. The synergies and interrelations that would give them such a position are not always simple to be achieved or even perceived by customers. The chosen approach was focused on B2B companies, because processes and communication tend to be more truncated, as they are usually more technical in the way of doing business. This can make the challenges of interrelation and synergy even greater.
Mathematical Literacy
Authors: Adams Thomasenia Lott
Published: April 2020

April 2020 Editorial
Fruição em artes e o processo de mediação nas atividades educativas no CRCP: um relato de experiência
Authors: Vieira e Sá Tolentino Igor , Nunes Carneiro Aline
Published: April 2020

Pretendo com este trabalho estudar a mediação em uma exposição, com o objetivo de analisar o processo de mediação e a fruição de arte na ação educativa, ocorridas no Centro de Referência da Cultura Popular e Tradicional Lagoa do Nado, junto a alunos da Educação Infantil. A partir de uma pesquisa bibliográfica, realizei um levantamento de informações sobre o Processo de Mediação e Fruição em Arte, levando à análise do relato de experiência apresentado no artigo. Percebi ao longo das minhas experiências como mediador cultural, que os grupos de visitantes geralmente desconheciam alguns movimentos, patrimônios e ramificações da cultura popular de Belo Horizonte. Além disso, quando iniciei o estágio extracurricular no CRCP, não recebíamos visitações das turmas de Educação Infantil, apesar de haver uma demanda por parte das escolas. Como resultado, foi possível explorar conceitos de autores que abordam noções do ensino de arte e mediação, de adequação de linguagem em relação ao público alvo, nas atividades de apreciação da arte visual e música
O som do silêncio: vibrações da música no desenvolvimento sociocultural da criança com espectro autista
Authors: Mattos Garbareth Edianne , Rausch Rita Buzzi , Lang Amanda
Published: April 2020

Este artigo configura-se como uma análise da música no desenvolvimento sociocultural da criança com espectro autista, partindo das experiências e inquietações das pesquisadoras em relação a esta temática no contexto educativo da Educação Infantil. Possui como objetivo compreender as repercussões e vibrações da música no desenvolvimento sociocultural da criança com espectro autista na Educação Infantil e a partir disso, instigar reflexões sobre o tema. Trata-se de uma pesquisa qualitativa de cunho teórico, mas que também apresenta sugestões práticas de como regular o espaço com música para criança com espectro autista. Toma como percurso, sobretudo, as ideias de Vigotski (1929, 1995, 1997, 1998, 2009, 2003, 2010). Por intermédio desse texto, suscita-se reflexões sobre os processos de apropriação da criança com espectro autista com os signos da música, e como a música pode potencializar ações educativas em relação à inclusão na Educação Infantil. Na produção deste artigo, desvela-se a importância de pensar em práticas educativas para crianças com espectro autista, enfatizando uma inclusão mais humanizadora, crítica e consciente por meio da educação musical.
Entre corpos e interdições: discutindo sexualidades dos sujeitos com deficiência física e/ ou cognitiva
Authors: Soares Rodrigo Lemos , Cavalheiro Ariana Souza
Published: April 2020

As sexualidades, em específico, as de pessoas com as ditas deficiência física e/ ou cognitiva é o centro deste texto. Isso, porque, compreendemos que a sexualidade, como mais uma produção sócio-histórica-cultural, precisa ser debatida reiteradas vezes, nos diferentes campos educacionais. O presente artigo, por sua vez, se destina a discutir sobre noções de sexualidade narradas por sujeitos responsáveis por pessoas com deficiência física e/ ou cognitiva. Nosso aporte metodológico é o campo dos Estudos Culturais, na sua vertente pós-estruturalista e as ferramentas para produção de dados foram um grupo focal e entrevistas semiestruturadas. Os materiais produzidos foram debatidos, a partir da técnica denominada Análise de Conteúdo. Segundo as análises dos materiais percebemos que a sexualidade dos sujeitos com deficiência física e/ ou cognitiva, para além de silenciada é invisibilizada e quando discutida aparece de forma infantilizada sempre vigiada, seja por professores(as) e responsáveis, na tentativa de reprimir as manifestações de desejos que os sujeitos venham a apresentar, principalmente nos ambientes coletivos.