Synergistic effects of zinc borate and aluminiumtrihydroxide on flammability behaviour of aerospaceepoxy system

The flame retardancy of mono-component epoxy resin (RTM6), widely used for aerospace composites, treated with zinc borate (ZB), aluminium trihydroxide (ATH) and their mixtures at different concentrations have been investigated by morphological and thermal characterization. Cone calorimeter data reveal that combustion behaviour, heat release rate peak (PHRR) and heat release rate average (HRR Average) of RTM6 resin decrease substantially when synergistic effects of zinc borate and aluminium trihydroxide intervene. Thermogravimetric (TGA) results and analysis of the residue show that addition higher than 20% w/w of ZB, ATH, and their mixture greatly promotes RTM6 char formation acting as a barrier layer for the fire development. Depending upon the different used flame additives, SEM micrographs indicate that the morphology of residual char could vary from a compact amalgam-like structure, for the RTM6+ZB system, to a granular structure, characterized by very small particles of degraded resin and additive for the AT

The `s-rule' exclusion principle and vacuum interpolation in worldvolume dynamics

We show how the worldvolume realization of the Hanany-Witten effect for a supersymmetric D5-brane in a D3 background also provides a classical realization of the `s-rule' exclusion principle. Despite the supersymmetry, the force on the D5-brane vanishes only in the D5 `ground state', which is shown to interpolate between 6-dimensional Minkowski space and an $OSp(4^*|4)$-invariant $adS_2\times S^4$ geometry. The M-theory analogue of these results is briefly discussed.Comment: 25 pages, 9 figures, LaTeX JHEP styl

Profiling of Heavy Metals in ‘Kawakawa’ (Euthynus affinis) and Seawater and Bottom Sediments in Sarangani Coastline, Mindanao, Philippines

Heavy metals have the ability to accumulate in the human body and disrupt functions of some vital organs. These metals can find their way into humans by consumption of metal-contaminated fish. In this study, the presence of heavy metals was assessed in muscle tissues of ‘kawakawa’ tuna (Euthynnus affinis) from General Santos City Fish Port (GSCFP) and in Kiamba fish landing site, as well as seawater and bottom sediments along Sarangani coastline. The heavy metals cadmium (Cd) and lead (Pb) were analyzed using atomic absorption spectrophotometry; while for mercury (Hg) cold vapor atomic absorption spectrophotometry was used. Results revealed that heavy metals in the three ‘kawakawa’ samples from GSCFP had Hg concentration ranging from 0.045 to 0.108 mg.kg-1 which were below the limit set by the United States Food and Drug Administration. This implies that in general, the tuna samples do not pose a serious threat to the health of the consumers. Sediments obtained from Sarangani coastline showed presence of Pb at 62.27 mg.kg-1 which is below the 128 mg.kg-1 limit. Assessment of the pollution status of the study area revealed that the bottom sediments can be classified as unpolluted to moderately polluted from all levels of Cd, Pb, and Hg, which implies minimal heavy metal exposure of tuna species in the area. To ensure that no further contamination of seawater and bottom sediments occurs, possible sources of heavy metals such as the industries, should be regulated by implementing more stringent effluent standards

Profiling of Heavy Metals in Mackerel Tuna (Euthynnus affinis) and Seawater and Bottom Sediments in Sarangani Coastline, Southern Philippines

Heavy metals have the ability to accumulate in the human body and disrupt functions of some body organs. These metals can find their way into humans by consumption of metal-contaminated fish. In this study, the presence of heavy metals was assessed in muscle tissues of mackerel tuna (Euthynnus affinis), locally known as “kawakawa,” collected from General Santos City and Kiamba fish landing sites. Heavy metal presence was also evaluated in seawater and bottom sediments samples collected along the Sarangani coastline. Cadmium (Cd) and lead (Pb) were analyzed using atomic absorption spectrophotometry; while mercury (Hg), through cold vapor atomic absorption spectrophotometry. Results revealed that the three samples from GSCFP had Hg concentrations ranging from 0.045 to 0.108 mg·kg−1, below the limit set by the United States Food and Drug Administration (US FDA). In the case of Cd, 0.095 mg·kg−1 Cd was detected from only one out of six samples taken from Kiamba, which exceeded the limit of 0.05 mg·kg−1 prescribed by the US FDA, US Environmental Protection Agency (US EPA), and the European Commission (EC). The data generally indicates that the tuna samples do not pose a serious threat to the health of the consumers. Sediments obtained from Sarangani coastline showed presence of Pb at 62.27 mg·kg−1, which is also below the 128 mg·kg−1 limit. Assessment of pollution status of the study area revealed that the bottom sediments can be classified as unpolluted to moderately polluted based on the levels of Cd, Pb, and Hg, implying minimal heavy metal exposure of this tuna species from the two sampling areas. To ensure no incremental contamination of seawater and bottom sediments occurs, developmental and anthropogenic activities, such as the indiscriminate disposal of industrial and domestic wastes that may be possible sources of heavy metals, should be regulated and more stringent effluent standards adopted

El territorio de la espiritualidad naturalizada

El cambio de territorio de la religión a la espiritualidad en nuestras sociedades secularizadas ha hecho emerger la llamada espiritualidad naturalizada en el interior de la tradición naturalista. Se presentan críticamente las propuestas de O.W. Flanagan, S.Harris, así como el ethos naturalista contemporáneo en el que aparecen

Warehouse management model using FEFO, 5s, and chaotic storage to improve product loading times in small- and medium-sized non-metallic mining companies

This article addresses one of the main problems faced by small- and medium-sized business in the non-metallic mining sector in Peru. These companies own warehouses and face the major problem of failing to deliver orders correctly and in a timely manner. This problem usually occurs when the business grows from a small- to medium-sized company in a short span of time; this situation leads to new processes within warehouses that are mostly not standardized. Besides, facilities are no longer optimal in space and the workers are not properly trained. The case study shows that the orders were not delivered on time due to factors such as lack of product identification, although the products have an expiration date and a warehouse without signaling and surrounded by traffic. To tackle this situation, a labeling process has been designed for the products, an adequate distribution technique is used in the warehouse through a newly designed warehouse layout, and a First Expired, First Out system has been implemented. Similarly, the design is accompanied by the 5s tool to provide a basis for order and continuous improvement. The results show that deliveries with delays were reduced from 38% to 10%. These results show that companies can grow rapidly and maintain quality of service through orderly management

Deforming baryons into confining strings

We find explicit probe D3-brane solutions in the infrared of the Maldacena-Nunez background. The solutions describe deformed baryon vertices: q external quarks are separated in spacetime from the remaining N-q. As the separation is taken to infinity we recover known solutions describing infinite confining strings in ${\mathcal{N}}=1$ gauge theory. We present results for the mass of finite confining strings as a function of length. We also find probe D2-brane solutions in a confining type IIA geometry, the reduction of a G_2 holonomy M theory background. The relation between these deformed baryons and confining strings is not as straightforward.Comment: 1+13 pages. LaTeX. 3 Figures. Factor of 2N fixed to N for the IIA background. Minor changes to tex

Analysis of Shot Noise at Finite Temperatures in Fractional Quantum Hall Edge States

We investigate shot noise at {\it finite temperatures} induced by the quasi-particle tunneling between fractional quantum Hall (FQH) edge states. The resulting Fano factor has the peak structure at a certain bias voltage. Such a structure indicates that quasi-particles are weakly {\it glued} due to thermal fluctuation. We show that the effect makes it possible to probe the difference of statistics between $\nu=1/5,{}2/5$ FQH states where quasi-particles have the same unit charge.Finally we propose a way to indirectly obtain statistical angle in hierarchical FQH states.Comment: 5 pages, 3 figure

Las recientes reformas legales en el sistema matrimonial español

Las recientes reformas legales en el sistema matrimonial español han afectado al matrimonio religioso, tanto en su momento constitutivo como en su momento extintivo. Algunas de estas reformas han tenido por objeto directo el matrimonio de carácter religioso, mientras que otras –no menos importantes– han llegado al matrimonio religioso al modificarse la regulación del matrimonio civil. La Ley de Jurisdicción voluntaria ha extendido la autorización de matrimonios religiosos, en orden a proteger y promover los principios constitucionales de libertad, igualdad y pluralismo. Admite el matrimonio religioso previsto por aquellas confesiones o comunidades, que estando inscritas en el Registro de Entidades Religiosas, hayan obtenido declaración de notorio arraigo en España, como los Mormones, los Testigos de Jehová, Budistas o la Iglesia Ortodoxa. Además, las recientes reformas legales han modificado, si bien indirectamente, el procedimiento para el reconocimiento de las resoluciones eclesiásticas matrimoniales.The subject of this article is the recent change in the law regarding the celebration and dissolution of confessional marriages. Since July 2015, different kinds of marriages have been permitted in Spain in order to honour constitutional principles such as religious freedom, equality and pluralism. People in Spain may enter into civil marriage via a civil or religious process, or into canonical marriage in canonical form. Regardless of the marriage process, identical civil rights are granted on the celebration of the marriage. The religious processes are also substantially affected by the Voluntary Jurisdiction Act, amendments to the Civil Code and the Civil Registration Act. The final result is that Spanish people are allowed to be married by the rite of other religions or churches, such as Buddhism, Hinduism, the Orthodox Church, Jehovah’s Witnesses, and the Church of Jesus Christ of the Latter-day Saints (informally, the Mormon Church). Spanish law likewise fully recognizes canonical marriage, and the complete regulation thereof by ecclesiastical laws, including in relation to absolution. However, the procedures whereby civil rights are granted to ecclesiastical decisions have been profoundly altered by the recent changes in the law