Practical considerations in aeroelastic design

The structural design process for large transport aircraft is described. Critical loads must be determined from a large number of load cases within the flight maneuver envelope. The structural design is also constrained by considerations of producibility, reliability, maintainability, durability, and damage tolerance, as well as impact dynamics and multiple constraints due to flutter and aeroelasticity. Aircraft aeroelastic design considerations in three distinct areas of product development (preliminary design, advanced design, and detailed design) are presented and contrasted. The present state of the art is challenged to solve the practical difficulties associated with design, analysis, and redesign within cost and schedule constraints. The current practice consists of largely independent engineering disciplines operating with unorganized data interfaces. The need is then demonstrated for a well-planned computerized aeroelastic structural design optimization system operating with a common interdisciplinary data base. This system must incorporate automated interfaces between modular programs. In each phase of the design process, a common finite-element model for static and dynamic optimization is required to reduce errors due to modeling discrepancies. As the design proceeds from the simple models in preliminary design to the more complex models in advanced and detailed design, a means of retrieving design data from the previous models must be established

SIMBA: a web tool for managing bacterial genome assembly generated by Ion PGM sequencing technology

Background The evolution of Next-Generation Sequencing (NGS) has considerably reduced the cost per sequenced-base, allowing a significant rise of sequencing projects, mainly in prokaryotes. However, the range of available NGS platforms requires different strategies and software to correctly assemble genomes. Different strategies are necessary to properly complete an assembly project, in addition to the installation or modification of various software. This requires users to have significant expertise in these software and command line scripting experience on Unix platforms, besides possessing the basic expertise on methodologies and techniques for genome assembly. These difficulties often delay the complete genome assembly projects. Results In order to overcome this, we developed SIMBA (SImple Manager for Bacterial Assemblies), a freely available web tool that integrates several component tools for assembling and finishing bacterial genomes. SIMBA provides a friendly and intuitive user interface so bioinformaticians, even with low computational expertise, can work under a centralized administrative control system of assemblies managed by the assembly center head. SIMBA guides the users to execute assembly process through simple and interactive pages. SIMBA workflow was divided in three modules: (i) projects: allows a general vision of genome sequencing projects, in addition to data quality analysis and data format conversions; (ii) assemblies: allows de novo assemblies with the software Mira, Minia, Newbler and SPAdes, also assembly quality validations using QUAST software; and (iii) curation: presents methods to finishing assemblies through tools for scaffolding contigs and close gaps. We also presented a case study that validated the efficacy of SIMBA to manage bacterial assemblies projects sequenced using Ion Torrent PGM. Conclusion Besides to be a web tool for genome assembly, SIMBA is a complete genome assemblies project management system, which can be useful for managing of several projects in laboratories. SIMBA source code is available to download and install in local webservers at http://ufmg-simba.sourceforge.net

Extraction techniques and clean-up procedures for the determination of pahs in sediments of the Ceará coast

Extraction and clean-up are essential points in polycyclic aromatic hydrocarbon (PAHs) analysis in a solid matrix. This work compares extraction techniques and clean-up procedures for PAH analysis. PAH levels, their toxicological significance and source were also evaluated in the waters of the Cocó and Ceará rivers. The efficiency of PAH recovery was higher for the soxhlet and ultrasonic techniques. PAH recovery varied from 69.3 to 99.3%. Total PAH concentration (ΣHPA) varied from 720.73 to 2234.76 µg kg-1 (Cocó river) and 96.4 to 1859.21 µg kg-1 (Ceará river). The main PAH sources are pyrolytic processes and the levels were classified as medium so that adverse effects are possible

Tanikala at Talinhaga: Ang Manunulat na Bilanggong Politikal (Chain and Metaphor: The Writer-Political Prisoner)

In the discourse of Philippine national history, the ethnolinguistic groups in the marginalized islands of Visayas and Mindanao play an important role in the construction of the nation. For instance, the parang sabil of the Tausug may be considered as a form of resistance against the colonizers vis-à-vis the 1896 revolution of the Katipuneros in Luzon. The term parang sabil comes from parang, meaning war or sword, and sabil, meaning killed in the way of God. It is a traditional Tausug practice by which the Tausugs defend their religion Islam against the threatening infidels. This paper will make use of an ethnic narrative song of the Tausug of Sulu entitled “The Parang Sabil of Abdulla and Putli’ Isara,” as a tool to understand how the group fought based on their cultural beliefs, from the armed struggle against a country who treats them as outsiders up to the battles invoked in the name of religion. Keywords: Folk literature, ethnic studies, Mindanao studies, Spanish colonialism in the Philippine

Artistikong Produksyon ng mga Bilanggong Pulitikal sa Pilipinas (2015-2018): Mga Piling Kaso at Tala

During the 1920’s, prisoners made use of their time in producing wood products that were sold to foreign and local buyers. This system did not only make an assembly line of prisoners; it was also a means of reforming the prisoners. Bilibid prisoners were transformed into skilled laborers. Rehabilitation and isolation of prisoners created profit for the benefit of the administration of the penal system and thus as a source of funding. These products also served as material artifacts that project the productive condition of local criminals. Moreover, the products manufactured inside Bilibid manifested the so called effectiveness of the disciplining power of the penal system by the Americans. From this historical context, the paper aims to shed light on how political prisoners transformed their prison cell from a space of oppression into a place of subversion by analyzing selected cases of political prisoners from 2015-2018. It can also be seen here that the artistic productions of political prisoners are concrete manifestations on how they re-shaped and re-imagined their life experiences during imprisonment

Bayaning Talunan* Rebyu sa Pelikulang Caregiver (2008) Direksiyon ni Chito Roño

“Fly high with us like an eagle in the sky…” mula sa billboard ng isang caregiving agency sa Session Road sa Baguio. Kung may pera sa basura, mas maraming perang makukuha sa dumi ng mamamayan ng mga mayayaman na bansa. Parang ito ang gustong tukuying moral ng pelikulang Caregiver na ipinalabas sa buong bansa, maging sa Europa. Nakatuon ang banghay ng pelikula sa sitwasyong kinasadlakan ni Sarah, isang English teacher sa elementarya na napilitang magtrabaho sa London bilang caregiver. Pangkaraniwan at madaling tanggapin ang dahilang ibinigay ng pelikula para mangibang-bansa si Sarah: kailangan nilang mag-ipon para sa kinabukasan ng nag-iisa nilang anak (na sa katapusan ay dadalhin din ni Sarah sa London para makapiling niya). Nauna nang nagtrabaho ang asawa ni Sarah, si Teddy (John Estrada), sa London bilang nurse. Sa gitnang bahagi ng pelikula’y matutuklasan ni Sarah na isang assistant health aid lang pala si Teddy sa pinapasukan nitong ospital

An experiment on the link between risk preferencesand the willingness to become a farmer

This study investigates the link between risk preferences of agricultural students and their willingness to become a farmer. We conducted an incentivized experiment with 577 students of an agricultural university in Indonesia. Discriminating between alternative theories of decision‐ making under risk, we find that students' risk preferences behave in accordance with cumulative prospect theory, but risk preferences are not predictive of students' willingness to become a farmer. Framing the experimental lottery task in either an agricultural or a general entrepreneurship context does not alter the predictive power for the willingness to become a farmer. Our results contribute to the debates on risk and farm generational renewal, as well as the (lack of) parallelism in behavioral field experiments