Miracle-dz/UniFAR-FTUs huggingface dataset:
Bifurcation Analysis of a Delayed Worm Propagation Model with Saturated Incidence

This paper is concerned with a delayed SVEIR worm propagation model with saturated incidence. The main objective is to investigate the effect of the time delay on the model. Sufficient conditions for local stability of the positive equilibrium and existence of a Hopf bifurcation are obtained by choosing the time delay as the bifurcation parameter. Particularly, explicit formulas determining direction of the Hopf bifurcation and stability of the bifurcating periodic solutions are derived by using the normal form theory and the center manifold theorem. Numerical simulations for a set of parameter values are carried out to illustrate the analytical results.
Research of Ice-melting Monitoring System Based on Internet of Things and Image Processing Techniques

With the fast development of electricity system in China, the lack of a monitor method to ensure the stability and safety of electric transmission simultaneously comes with the strengthened construction of power supply. Besides, the Icing phenomenon is common to see in the electricity system and it brings enormous damages and negative social influence. However, the current Icing monitoring system needs substantive energy to consume and it is expensive to maintain. Accordingly, having analyzed the existing project, the author designed a new method which is based on the detecting pattern of Internet of things, including CCD image capture, assisting sensor detection, information collection via ZigBee Internet, DSP image processing and GPRS centralized transmission, to automatically process and analyze the icing situation through image processing technique. Keywordsice-melting; internet of thing; image processing techniques; monitoring
Use of Anthropometric Measures to Analyze How Sources of Water and Sanitation Affect Chidren’s Health in Nigeria

We used 2008 DHS data sets to construct child height- and weight-for-age Z-scores and used regression analysis to analyze the effects of different sources of drinking water and sanitation on child health outcomes in Nigeria. We also calculated the probability of a child being stunted or underweight as our measure of malnutrition among children aged 0–59 months. Our results show that both child height and weight Z-scores are positive and significantly related to access to borehole and piped water, and negative and significant for well water. The probabilities of a child being stunted or underweight are both significantly lower for children drinking borehole or piped water, whereas well water has a positive and significant effect on these measures of child health. Children’s access to flush toilets is positive and significantly related to child height- and weight-for-age Z-scores, but the same measures are negatively related to children’s use of pit latrines. In line with this, the probability of a child being stunted or underweight is negative and significantly related to access to flush toilets, but positively related to pit latrines. Our results suggest that increasing access to, or providing, safe drinking water and flush toilets for households will significantly reduce the high incidence of malnutrition and water-borne diseases among children in Nigeria and should be a high priority for policymakers.
Expression of HPA in astrocytomas and its effect on invasiveness of tumor cells

Objective: To observe the expression of heparanase (HPA) in human astrocytomas tissue and its effect on invasiveness of tumor cells. Methods: Immunohistochemical Elivision™plus two step method and Realtime-PCR method were used to detect the expression of HPA protein and mRNA in 75 cases of astrocytoma tissues and 40 cases of normal brain tissues. Silencing HPA expression in astrocytoma U87 cells by siRNA interference technique, and adopting Realtime PCR, Western blot, Transwell chamber experiment, the expression and cell invasiveness change of tumor cells HPA, vascular endothelial growth factor (VEGF), matrix metalloproteinase -9 (MMP.9) were detected. Results: The expression of HPA protein was not found in normal brain tissues, HPA positive expression rate in astrocytoma tissues was 78.67% (59/75), and the positive expression rate of HPA in astrocytoma tissues was significantly higher than that in normal brain tissues, and its expression level of mRNA was significantly higher than that in normal brain tissues, the difference of which was statistically significant (χ2=67.8, P<0.05). The positive expression rate of HPA in grade II to IV group of astrocytoma increased gradually, the difference of which was statistically significant (χ2=131.5, P<0.05); the positive expression rate of HPA in metastasis group was significantly higher than that in non-metastasis group (χ2=89.3, P<0.05). SiRNA can effectively inhibit the expression of HPA in astrocytoma U87 cells, and down regulate the expression of VEGF, MMP-9, at the same time the number of transmembrane cells decreased significantly, and the difference was statistically significant (P<0.05). Conclusion: HPA is highly expressed in astrocytomas tissues, and with the increase of malignancy of tumor, the expression increases gradually. The cell invasiveness decreased significantly after siRNA silenced HPA, and HPA might be a potential target for the treatment of astrocytomas.
An Immunization Strategy Based on Propagation Mechanism

With the ubiquity of smart phones, wearable equipment, and wireless sensors, the topologies of networks composed by them change along with time. The immunization strategies in which network immune nodes are chosen by analyzing the static aggregation network topologies have been challenged. The studies about interaction propagations between two pathogens show that the interaction can change propagation threshold and the final epidemic size of each other, which provides a new thinking of immunization method. The eradication or inhibition of the virus can be achieved through the spread of its opposite party. Here, we put forward an immunization strategy whose implementation does not depend on the analysis of network topology. The immunization agents are randomly placed on a few of individuals of network and spread out from these individuals on network in a propagation method. The immunization agents prevent virus infecting their habitat nodes with certain immune success rate. The analysis and simulation of evolution equation of the model show that immune propagation has a significant impact on the spread threshold and steady-state density of virus on a finite size of BA networks. Simulations on some real-world networks also suggest that the immunization strategy is feasible and effective.
Physiological and Biochemical Mechanisms of Plant Adaptation to Low-Fertility Acid Soils of the Tropics: The Case of Brachiariagrasses

Brachiaria species are the most widely planted tropical forage grasses in the world (Miles et al., 2004). For example, in Brazil alone, about 80 million hectares are planted to Brachiaria pastures (Macedo, 2005). They increase animal productivity by 5 to 10 times with respect to native savanna vegetation in the tropical areas of Latin America, thus representing a significant contribution to farmer’s income (Rao et al., 1993). Although their origin is from the tropical areas of Africa, they are also used for livestock production in South-East Asia and Australia. Among them, Brachiaria decumbens cv. Basilisk, Brachiaria brizantha cv. Marandu, and Brachiaria ruziziensis cv. Kennedy have been more commonly utilized for livestock production in the tropics (Miles et al., 2004). Among the three grasses, B. decumbens is highly adapted to infertile acid soils, i. e. , high level of tolerance to high aluminium (Al) saturation, low phosphorus (P) and low calcium (Ca) supply in soil (Louw-Gaume et al., 2010 a,b; Rao et al., 1995, 1996; Wenzl et al., 2001, 2003), but also highly sensitive to a major insect, spittlebugs (Miles et al., 2006) and produces mycotoxin after infection with Pithomyces chartarum (Andrade et al., 1978). B. brizantha cv. Marandu is highly resistant to spittlebugs, adapted to seasonal drought stress, highly responsive to fertilizer application but is not well adapted to low fertility acid soils (Miles et al., 2004, 2006). B. ruziziensis cv. Kennedy is sensitive to spittlebugs, performs better in well-drained fertile soils, has high forage quality but poorly adapted to low fertility acid soils (Ishigaki, 2010; Miles et al., 2004). B. decumbens and B. brizantha are generally tetraploid, apomicts while B. ruziziensis is diploid, sexual (Miles et al., 2004, 2006).
Effective andragogical strategies: What works with teachers? Reflection on practice

Andragogy focuses upon methods and practices of helping adults learn. Autonomy, self-direction, relevance to one’s life’s experience and knowledge, tapping into the cognitive, affective and psychomotor domains are all learning principles of how adults learn best. This research aimed at identifying successful strategies which facilitate effective adult learning. Several sessions were carried out with groups of professionals working within secondary education (ages 10 to 16), including: the academic team, learning area leaders, teachers, and learning support assistants. A learning process framework was developed and used as the basis of each planned session. Feedback from each group of participants was collected. The main observations denoted from the study reiterated that the learning process framework adopted enhanced the teachers’ grasp of theories and their application to the classroom. Feedback received highlighted the importance of frequent, short, professional learning sessions. Further research is needed to determine the long-term effectiveness of professional training.
The Indifferent, the Good Samaritan, the Brave and the Agent in Allais Paradox situation – or How Endowment Effect Influences Our Decision in Case of Allais Paradox?

Abstract Background and purpose: Mainstream economic models do not take ownership into consideration. Only after the findings of behavioural economists was endowment effect widely observed. Endowment effect means that goods that one owns are valued higher than other goods not held in endowment. At the same time the principal-agent literature is concerned with how the principal (such as employer) can motivate his agent (say the employee), to act in the principal’s interests and also for their holdings. The main problem is that acting in somebody’s else’s interests can influence our values as well. Moreover, the principal as owner suffers from endowment effect. Both situations can be treated as a risky decision. Risk confuses our rationality in a predictable way. Design/Methodology/Approach: Due to this it was observed how foreign students from various cultural backgrounds decided (n=186 answers) in a risky financial situation by focusing on Allais’ classic gambles. I also presented their preferences over certain and uncertain outcomes regarding the owner of the final win; i.e. how they choose for themselves or on behalf of one of their best friends. One famous experiment - which tested the descriptive validity of the axioms’ expected utility theory - was Allais. Allais handled probabilities and outcomes in high hypothetical payoff financial gamble situations; he found that when offering two similar options, the common consequences will not be removed by the actors. I was interested in what happens when the actors take risks on behalf of others. It was used between-subjects technique on an extended multicultural sample. Regarding the two different topics, three hypotheses were tested (1); based on Allais paradox (2); observed ownerships (3); the comparison of two phenomena. Results: The results show that the subjects responded differently when they needed to decide about their own properties rather when their friends’ properties were concerned. When a sure safe outcome was offered to the subjects, they took more risk on behalf of their friends rather than own. Moreover, the subjects do not take into consideration that the same attributes must be ignored, so Allais paradox was verified. Conclusion: The goal of this paper is then twofold. First, it was established a conceptual link between Allais-type behaviour and ownership problem. Second, Allais axiom was used to characterize different roles. Knowing predictable patterns of seemingly irrational heuristics in human behaviour can improve economic theory. At the same time, this knowledge helps us to avoid irrational decisions.
Hard Tissue Regeneration Treatment Protocols in Contemporary Oral Surgery

Dental implant placement is one of the most reliable and predictable treatment choices in modern oral surgery. It requires available bone volume to resist the force during loading. There are many ways to regenerate the bone to place the implants with the desired dimensions. Guided bone regeneration, socket grafting, allograft bone block grafting, and intraand extraoral autogenous bone block grafting are the most popular treatment approaches to reconstruct hard tissues. Autogenous bone graft is still considered the gold standard for the reconstruction of hard tissues. In addition, there are many scaffold biomaterials available that are used as templates for new bone formation. These biomaterials are helpful to not only eliminate the usage of autogenous bone grafts but also decrease patient morbidity. Another advantage of biomaterial usage in tissue regeneration is to reduce the learning curve of treatments by facilitating operative approaches. The aim of this chapter is to evaluate contemporary biomaterials that are used to reconstruct hard tissue defects in oral surgery.
Network Degradation Effects on Different Codec Types and Characteristics of Video Streaming

Nowadays, there is a quickly growing demand for the transmission of voice, video and data over an IP based network. Multimedia, whether we are talking about broadcast, audio and video transmission and others, from a global perspective is growing exponentially with time. With incoming requests from users, new technologies for data transfer are continually developing. Data must be delivered reliably and with the fewest losses at such high speed. Video quality as part of multimedia technology has a very important role nowadays. It is influenced by several factors, where each of them can have many forms and processing. Network performance is the major degradation effect that influences the quality of resulting image. Poor network performance (lack of link capacity, high network loadâ€¦) causes data packet losses or different delivery time for each packet. This work focuses exactly on these network phenomena. It examines the impact of different delays and packet losses on the quality parameters of triple play services, to evaluate the results using objective methods. The aim of this work is to bring a detailed view on the performance of video streaming over IP-based networks.
Dual-Band Dual-Sense Unidirectional Circularly Polarized Antenna with CPW-Fed for Wireless Applications

A novel dual-band unidirectional circularly polarized (CP) antenna fed by coplanar waveguide (CPW) for wireless applications is proposed. The antenna configuration consists of a ring- shaped ground, an F-shaped central strip and a spherical cap reflector. The longer and shorter branches of the F-shaped central strip help to produce radiations at lower and higher frequencies. The CP characteristics are achieved by adding two solid arcs and a grounded tuning stub. Both simulated and measured results are given and analyzed. Measurement results show a 10 dB return loss with a bandwidth of 56% (2.15 GHz-3.83 GHz) at 2.45 GHz (ISM), and a bandwidth of 42.6% (4.67 GHz- 7.2 GHz) at 5.8 GHz (HiperLAN), a 3 dB axial ratio bandwidth of 15.1% (2.25 GHz-2.62 GHz), 4.1% (5.67 GHz-5.91 GHz). The maximum gains within the two CP bands are 8.7 dBic and 10.2 dBic, respectively.
Composite Scaffolds Based on Silver Nanoparticles for Biomedical Applications

This paper presents the synthesis, characterisation, and in vitro testing of homogenous and heterogeneous materials containing silver nanoparticles (nanoAg). Three types of antiseptic materials based on collagen (COLL), hydroxyapatite (HA), and collagen/hydroxyapatite (COLL/HA) composite materials were obtained. The synthesis of silver nanoparticles was realized by chemical reaction as well as plasma sputtering deposition. The use of chemical reduction allows the synthesis of homogenous materials while the plasma sputtering deposition can be easily used for the synthesis of homogeneous and heterogeneous support. Based on the in vitro assays clear antiseptic activity against Escherichia coli was relieved even at low content of nanoAg (10 ppm).
Design and qualification of a supersonic wind tunnel for induced boundary layer transition research

This paper presents the design and the results of the qualification test campaign of a multiple Mach number supersonic wind tunnel designed for induced boundary layer transition. Its characteristics, function, and instrumentation are described. The range of Mach numbers successfully span is presented along with the measured intensities of freestream fluctuations. All the measurement techniques implemented in the test campaigns after the qualification are introduced, and some results shown and commented to highlight their potentialities.
What is the real nature of blinkers

In the present paper a simple physical model of blinkers based on the process of magnetic reconnection is developed. Blinkers were first found in transition region lines (e.g. He I, O III, O IV, O V and Mg IX) by SOHO CDS. Their typical lifetime is approximately 16 min, the intensity enhancement ratios are around 1.8, and they appear at 1–20 s -1 on the solar disk. According to observations, blinker events seem to be increases in density and/or filling factor rather than increases in temperature. Most blinkers have a repetitive nature and a high percentage of these events occur above unipolar magnetic fields. Magnetic reconnection in the lower transition region of the solar atmosphere is numerically simulated by solving the fully nonlinear, time-dependent, dissipative, radiative 2D MHD equations. Setting the initial parameters describing transition region explosive events as in Roussev et al. ([CITE],b,c), we computed the evolution of the reconnection jets. Taking into account the limit of the spatial and temporal resolution of the CDS camera and converting the high-resolution numerical results into “CDS-resolution”, the propagating reconnection jets are found to have similar properties as those described by CDS blinker observations. These results suggest SOHO CDS may actually observe reconnection driven explosive events as blinkers.
Electrochemical Copolymerization of Diphenylamine and Anthranilic Acid with Various Feed Ratios

Electrochemical copolymerization of diphenylamine (DPA) with anthranilic acid (AA) was performed in aqueous 4 M H 2 SO 4 solution for different feed ratios of DPA using cyclic voltammetry. The copolymer film was grown for different numbers of cycles. C n , and feed ratios of DPA. Electrochemical homopolymerization of DPA was also carried out under identical conditions and compared. A growth equation of the deposited films in terms of concentrations of DPA and AA and C n is deduced as Q G = k[DPA] 20 [AA] 0.2 C n 1.2 by utilizing the charge associated for film deposition. The copolymer compositions were determined by X-ray photoelectron spectroscopy. Reactivity ratios of DPA and AA were computed by using Fineman-Ross and Kelen-Tudos methods.
Algorithms for bounding Folkman numbers

For an undirected, simple graph G, we write G → (a1, . . . , ak) v (G → (a1, . . . , ak) ) if for every vertex (edge) k-coloring of G, a monochromatic Kai is forced in some color i ∈ {1, . , k}. The vertex (edge) Folkman number is defined as Fv(a1, . . . , ak; p) = min{|V (G)| : G→ (a1, . . . , ak; p) , Kp 6⊆ G} Fe(a1, . . . , ak; p) = min{|V (G)| : G→ (a1, . . . , ak; p) , Kp 6⊆ G} for p > max{a1, . , ak}. Folkman showed in 1970 that these numbers always exist for valid values of p. This thesis concerns the computation of a new result in Folkman number theory, namely that Fv(2, 2, 3; 4) = 14. Previously, the bounds stood at 10 ≤ Fv(2, 2, 3; 4) ≤ 14, proven by Nenov in 2000. To achieve this new result, specialized algorithms were executed on the computers of the Computer Science network in a distributed processing effort. We discuss the mathematics and algorithms used in the computation. We also discuss ongoing research into the computation of the value of Fe(3, 3; 4); the current bounds stand at 16 ≤ Fe(3, 3; 4) ≤ 3 × 10 . The upper bound on this number was once the subject of an Erdös prize—claimed by Spencer in 1988.
Characterization of the gun phenotype under photo-bleaching conditions

Protein complexes involved in biochemical processes of organelles are composed of subunits encoded in the organelles and the nucleus. To guarantee energysaving assembly and efficient functioning of such protein complexes, a proper regulatory network is required. The anterograde control of the nucleus over the organelles is extensive and the principal parameters are known. It is also accepted that organelles send information about their developmental and metabolic state to the nucleus (‘retrograde signaling’) in order to adapt nuclear gene expression. But, the nature of the molecules that relay information to the nucleus is still unclear. In a mutant screen, designed to find factors involved in retrograde signaling in A. thaliana, the genomes uncoupled (gun) mutants were identified more than 15 years ago. Under photo-bleaching conditions induced by norflurazon (NF), an inhibitor of carotenoid biosynthesis, the expression of the nuclear localized gene encoding photosystem II chlorophyll a/b-binding protein (LHCB1.2) is suppressed in wild-type plants. In the gun mutants, this suppression is less pronounced. Since four out of the five known gun mutants are affected in the tetrapyrrole biosynthesis pathway, it was suggested that tetrapyrroles are involved in retrograde signaling. However, recent studies have cast doubt on that theory. In this thesis the performance of photo-bleached gun mutants was characterized in more detail. A before unknown phenotype of NF-treated gun mutants is described which is not due to NF resistance. In comparison to NF-treated wild-type seedlings the gun2-5 mutants affected in tetrapyrrole biosynthesis showed an enhanced growth capability, carotenoid enrichment, less anthocyanin accumulation and they retained plastome-encoded proteins. Replacement of NF by other inhibitors of carotenoid biosynthesis (such as amitrole) revealed that the growth and pigmentation phenotype is not coupled to the LHCB1.2 mRNA accumulation phenotype. Furthermore, it is shown that no simple correlation between any single metabolite, pigment or reactive oxygen species and LHCB1.2 expression exist. The observed heme accumulation caused by NF treatment is also not related to the LHCB1.2 de-repression phenotype. Application of abscisic acid (ABA) to NF-treated wild-type plants was sufficient to increase LHCB1.2 mRNA levels, but ABA is not involved in GUNdependent signaling associated with tetrapyrrole biosynthesis. It is discussed that more natural conditions are necessary to uncover the regulatory network of GUN signaling.
MULTIRESOLUTION TIME DOMAIN SCHEME USING SYMPLECTIC INTEGRATORS

We incorporate high-order symplectic time integrators into multiresolution time domain (MRTD) schemes. The stability and numerical dispersion analysis are presented. The proposed scheme preserves the symplectic structure of Maxwell's equations and can be easily implemented in program codes. Compared to Runge-Kutta (RK)-MRTD, the suggested scheme is more accurate in long-term simulations and requires less computational resource.