4,306 research outputs found
The Treatment of Ties in AP Correlation
No full textThe Kendall tau and AP correlation coefficients are very commonly use to compare two rankings over the same set of items. Even though Kendall tau was originally defined assuming that there are no ties in the rankings, two alternative versions were soon developed to account for ties in two different scenarios: measure the accuracy of an observer with respect to a true and objective ranking, and measure the agreement between two observers in the absence of a true ranking. These two variants prove useful in cases where ties are possible in either ranking, and may indeed result in very different scores. AP correlation was devised to incorporate a top-heaviness component into Kendall tau, penalizing more heavily if differences occur between items at the top of the rankings, making it a very compelling coefficient in Information Retrieval settings. However, the treatment of ties in AP correlation remains an open problem. In this paper we fill this gap, providing closed analytical formulations of AP correlation under the two scenarios of ties contemplated in Kendall tau. In addition,we developed an R package that implements these coefficients.Best Short Paper Accepted author manuscriptMultimedia ComputingWeb Information System
Delamination Analysis of A Class of AP-PLY Composite Laminates
No full textA recently developed fiber placement architecture, AP-PLY, has been shown to give significantly improved damage tolerance characteristics of composite structures. The behavior of delaminations resulting from low speed impact damage is of particular concern. Major attention has been paid to expand current knowledge on the delamination response of simple AP-PLY composite structure and move towards in-depth understanding of the failure mechanisms behind the damage tolerance. This thesis presents the approaches to predict delamination onset and analyze delamination growth, in support of the search of the optimum woven pattern for AP-PLY composite laminates. The recovered interlaminar stress between layers combined with the maximum stress criterion determined the delamination onset of simple AP-PLY composite laminate under out-of-plane loads. 2D finite element models with cohesive elements inserted in the interfaces of woven layers have been built to evaluate the delamination initiation and propagation in the different woven patterns of simple AP-PLY composite beams. The parameters of the woven pattern, such as the woven angle, the number of woven plies, the number of straight filled plies, and the location of the woven patterns in through the thickness direction, were investigated and shown to have a significant effect on delamination creation and growth. An energy method based on beam theory was proposed to analyze the strain energy release rate (SERR) of an existing crack in an AP-PLY beam structure. The developed analytical method was implemented in isotropic materials and the obtained SERR of a crack was validated by reference results and finite element solutions. The general behavior of crack growth on the left or right crack tip was evaluated and basic trends leading to crack propagation on one side of the crack were established. A correction factor was introduced to improve the accuracy of the SERR of a small crack through the numerical calculation. The singularity of crack tip caused by dissimilar materials was investigated and was found that the inclusion of the singularity effect could increase the accuracy for small cracks. It has been shown that the neutral axis needs to be relocated to decouple the bending and membrane behavior of unsymmetrical composite laminates, thus to meet the requirement of minimizing the strain energy of the delaminated beam to calculate the SERR of a delaminated composite beam. The calculated SERR of a crack in a composite beam has been verified by comparing with a finite element model. The woven plies in AP-PLY composite laminate altered the layup and two conventional laminates with different stacking sequences were identified in an AP-PLY composite laminate based on the assumption that the resin areas were ignored. A step by step approach was developed to obtain the SERR of a crack that goes across different materials. The analytical SERR determined when two materials are used in sequence, sets the stage for optimization of AP-PLY composite laminates without taking account of the effect of the resin area. The procedure of optimization of simple AP-PLY pattern was proposed and industry may benefit for many applications. An equivalent stiffness approach was used to model regions containing resin pockets and straight or inclined composite layers. A series of three point bending tests was carried out where the failure process and loading capacity were evaluated. The methodology, procedure of optimization, philosophy outlined in this thesis might also be applied to the more complicated fully woven AP-PLY composite laminates. The work in this thesis contributes to the understanding of the behavior of AP-PLY composite laminates with delaminations
Structure function analysis of blazars AP Librae and 3c279
No full textHighest Honors in AstronomyBlazars AP Librae and 3c279 are analyzed for microvariability using a technique known as structure function analysis. AP Librae was observed in April
of 2005 and 3c279 was observed in April of 2007. The data for AP Librae was
previously reduced by Andrew Collazzi and the author reduced the data for
3c279. Both sets of data were reduced using Robert Knop's data reduction
program.
The author ran structure function analysis on both sets of data. Structure function analysis is a statistical analysis run on data that is suppose to
nd timescales of variability, periodicity, and the noise type of data. Previous analysis of AP Librae confirmed mircrovariability, which also shows up in
the structure function of AP Librae. Blazar 3c279 was much quieter than AP
Librae and showed no microvariability durning any of the nights.College of Arts and ScienceDepartment of Physics and Astronom
AP-based wireless intrusion detection systems
No full textThis thesis was scanned from the print manuscript for digital preservation and is copyright the author.
Researchers can access this thesis by asking their local university, institution or public library to
make a request on their behalf. Monash staff and postgraduate students can use the link in the References field
Standar Mutu Bunga Melati Segar dan untuk Bahan Baku Industri
No full textBunga melati putih digunakan untuk rangkaian bunga segar, bahan baku industri teh dan minyak atsiri, sertakomoditas ekspor ke Singapura. Penelitian bertujuan untuk menyusun konsep standar mutu bunga melati segar danuntuk bahan baku industri. Standar mutu bunga melati segar dan bahan baku industri sangat diperlukan sebagaipatokan dalam pengembangan agribisnis bunga melati. Mutu bunga melati segar sangat ditentukan oleh ukurankuntum bunga, warna, dan kesegaran bunga. Bunga melati asal daerah Tegal, Tangerang, Cirebon, dan Bogor untukrangkaian bunga, dan bahan ekspor diamati karakteristik fisiknya (to tal panjang bunga, di am e ter kuntum bunga,panjang kuntum bunga, dan warna). Bunga melati untuk pabrik teh juga diamati fisik dan residu pestisidanya.Standar mutu bunga melati untuk rangkaian yaitu bunga kuncup berwarna putih, segar, dan berukuran besar (di am e terkuntum 6,58±0,733 mm, panjang kuntum 11,76±1,389 mm). Standar melati untuk ekspor adalah kuncup berwarnaputih, segar, dan berukuran besar (di am e ter kuntum 6,8640±0,5858 mm, panjang kuntum 12,454±1,040 mm). Standarmutu bunga untuk pewangi teh, kuntum bunga kuncup berwarna putih, tidak ada kotoran, dan jumlah bunga tidakdapat mekar terikut maksimum 10%. Standar bunga melati untuk minyak atsiri adalah, kuncup, segar, berwarna putih,dan tanpa tangkai. Kadar residu pestisida masih di bawah ketentuan dan residu pestisida pada tehnya adalah tidak ada.Qual ity of fresh white jas mines for stan dard freshus age and in dus trial pur pose. White jas mines have al ways been used for dec o ra tion, tea in dus try and es sen tial oilin dus try, as well as ex port com mod ity to Sin ga pore. The re search’s aims was to build a draft stan dard fresh jas minequal ity for fresh flow ers and in dus trial pur pose. The stan dard it self will be very use ful for agroindustry de vel op ment.Jas mine qual ity was af fected by the flower’s size, color, and its fresh ness. Jas mine from Tegal, Tangerang, Cirebon,and Bogor ar eas were mostly used as fresh flow ers. Tegal’s jas mines have been ex ported to Sin ga pore and have beenused for tea in dus try as well. Analized the jas mines for phys i cal ap pear ance (length, di am e ter, and color) and jas minefor ar o matic tea was for the pestiside res i due con tent. Qual ity stan dard for jas mine flower clus ter ar range ment re -quired bud white color, fresh, and should has rel a tively big size (6.58±0.733 mm in di am e ter, and 11.76±1.389 mm inlength). The ex ports qual ity have dif fer ent re quire ment, of white color and big size bud, (6.864±0.586 mm in di am e terand 12.454±1.040 mm in length). Stan dard qual ity for tea in dus try was white jas mine bud stages and free fromdispeckle with max i mum amount of bud flow ers was 10%. The stan dard for es sen tial oil was white col ored jas mineand bloomed yet, fresh, and stalkless. The res i due con tent on the jas mine was lower than the max i mum res i due limitand the res i due on the tea was un de tect able
Standar Mutu Bunga Melati Segar dan untuk Bahan Baku Industri
No full textBunga melati putih digunakan untuk rangkaian bunga segar, bahan baku industri teh dan minyak atsiri, sertakomoditas ekspor ke Singapura. Penelitian bertujuan untuk menyusun konsep standar mutu bunga melati segar danuntuk bahan baku industri. Standar mutu bunga melati segar dan bahan baku industri sangat diperlukan sebagaipatokan dalam pengembangan agribisnis bunga melati. Mutu bunga melati segar sangat ditentukan oleh ukurankuntum bunga, warna, dan kesegaran bunga. Bunga melati asal daerah Tegal, Tangerang, Cirebon, dan Bogor untukrangkaian bunga, dan bahan ekspor diamati karakteristik fisiknya (to tal panjang bunga, di am e ter kuntum bunga,panjang kuntum bunga, dan warna). Bunga melati untuk pabrik teh juga diamati fisik dan residu pestisidanya.Standar mutu bunga melati untuk rangkaian yaitu bunga kuncup berwarna putih, segar, dan berukuran besar (di am e terkuntum 6,58±0,733 mm, panjang kuntum 11,76±1,389 mm). Standar melati untuk ekspor adalah kuncup berwarnaputih, segar, dan berukuran besar (di am e ter kuntum 6,8640±0,5858 mm, panjang kuntum 12,454±1,040 mm). Standarmutu bunga untuk pewangi teh, kuntum bunga kuncup berwarna putih, tidak ada kotoran, dan jumlah bunga tidakdapat mekar terikut maksimum 10%. Standar bunga melati untuk minyak atsiri adalah, kuncup, segar, berwarna putih,dan tanpa tangkai. Kadar residu pestisida masih di bawah ketentuan dan residu pestisida pada tehnya adalah tidak ada.Qual ity of fresh white jas mines for stan dard freshus age and in dus trial pur pose. White jas mines have al ways been used for dec o ra tion, tea in dus try and es sen tial oilin dus try, as well as ex port com mod ity to Sin ga pore. The re search's aims was to build a draft stan dard fresh jas minequal ity for fresh flow ers and in dus trial pur pose. The stan dard it self will be very use ful for agroindustry de vel op ment.Jas mine qual ity was af fected by the flower's size, color, and its fresh ness. Jas mine from Tegal, Tangerang, Cirebon,and Bogor ar eas were mostly used as fresh flow ers. Tegal's jas mines have been ex ported to Sin ga pore and have beenused for tea in dus try as well. Analized the jas mines for phys i cal ap pear ance (length, di am e ter, and color) and jas minefor ar o matic tea was for the pestiside res i due con tent. Qual ity stan dard for jas mine flower clus ter ar range ment re -quired bud white color, fresh, and should has rel a tively big size (6.58±0.733 mm in di am e ter, and 11.76±1.389 mm inlength). The ex ports qual ity have dif fer ent re quire ment, of white color and big size bud, (6.864±0.586 mm in di am e terand 12.454±1.040 mm in length). Stan dard qual ity for tea in dus try was white jas mine bud stages and free fromdispeckle with max i mum amount of bud flow ers was 10%. The stan dard for es sen tial oil was white col ored jas mineand bloomed yet, fresh, and stalkless. The res i due con tent on the jas mine was lower than the max i mum res i due limitand the res i due on the tea was un de tect able
Environmental toxicity, redox signaling and lung inflammation:the role of glutathione
No full textGlutathione (gamma-glutamyl-cysteinyl-glycine, GSH) is the most abundant intracellular antioxidant thiol and is central to redox defense during oxidative stress. GSH metabolism is tightly regulated and has been implicated in redox signaling and also in protection against environmental oxidant-mediated injury. Changes in the ratio of the reduced and disulfide form (GSH/GSSG) can affect signaling pathways that participate in a broad array of physiological responses from cell proliferation, autophagy and apoptosis to gene expression that involve H(2)O(2) as a second messenger. Oxidative stress due to oxidant/antioxidant imbalance and also due to environmental oxidants is an important component during inflammation and respiratory diseases such as chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, acute respiratory distress syndrome, and asthma. It is known to activate multiple stress kinase pathways and redox-sensitive transcription factors such as Nrf2, NF-kappaB and AP-1, which differentially regulate the genes for pro-inflammatory cytokines as well as the protective antioxidant genes. Understanding the regulatory mechanisms for the induction of antioxidants, such as GSH, versus pro-inflammatory mediators at sites of oxidant-directed injuries may allow for the development of novel therapies which will allow pharmacological manipulation of GSH synthesis during inflammation and oxidative injury. This article features the current knowledge about the role of GSH in redox signaling, GSH biosynthesis and particularly the regulation of transcription factor Nrf2 by GSH and downstream signaling during oxidative stress and inflammation in various pulmonary diseases. We also discussed the current therapeutic clinical trials using GSH and other thiol compounds, such as N-acetyl-l-cysteine, fudosteine, carbocysteine, erdosteine in environment-induced airways disease
The Quest for Deeper Learning and Engagement in Advanced High School Courses
No full text· GLEF and a research team from the University of Washington worked with Washington\u27s Bellevue School District to develop and assess the impact of project-based learning on upper-level courses in high school.
· Research suggests that Advanced Placement (AP) courses may focus too much on accelerated content at the expense of deeper conceptual learning.
· The number of students taking AP courses has grown, but along with this the number failing has increased. GLEF and the research team tested project-based learning (PBL) to counteract this trend.
· Results after two years are promising. Students in the PBL-AP courses are performing as well or better than students in traditional AP courses.
· Other education funders are encouraged to use an iterative design process, work with a diverse design team, and bring in partners who can contribute needed expertise and resources
PENGARUH Chromolaena odorata DAN JERAMI SEBAGAI PUPUK DALAM BENTUK SEGAR DAN KOMPOS TERHADAP PERTUMBUHAN DAN HASIL TANAMAN PADI
No full textTanaman padi (Oryza sativa L.) merupakan tanaman pangan penting yang menjadi makanan pokok lebih dari setengah penduduk dunia karena mengandung nutrisi yang diperlukan tubuh. Indonesia sebagai negara dengan jumlah penduduk yang besar menghadapi tantangan dalam memenuhi kebutuhan pangan tersebut. Tidak stabilnya produksi padi antara lain disebabkan penurunan kesuburan tanah, baik secara alami maupun ada campur tangan manusia. Tujuan dari penelitian ini adalah merumuskan pengaruh bahan organik dalam bentuk segar dan kompos terhadap pertumbuhan dan hasil tanaman padi (Oryza sativa L).
Metode penelitian dilakukan dengan mengunakan rancangan acak kelompok petak terbagi atau split plot yaitu :Petak utama (PU) : Pemupukan D1= O (tanpa pemupukan) D2 = DRP (Dosis Rekomendasi Petani) (urea: 150 kg/ha; SP36: 300kg/ha; phonska: 250 kg/ha Za: 200 kg/ha) Anak petak (AP) : Pupuk hijau dengan dosis setara 167 kgN/ha P1 = Chromolaena odorata kompos 5 ton/ha P2 = Chromolaena odorata segar 7 ton/ha P3 = Jerami kompos 12 ton/ha P4 = Jerami segar 24 ton/ha, dengan tiga kali ulangan. Analisis data menggunakan analisis sidik ragam, jika terdapat perbedaan nyata dilanjutkan dengan uji jarak atau DMRT 0.05. Penelitian ini dilaksanakan pada lahan sawah irigasi di Desa Kadung Rembug, Kecamatan Sukodadi, Kabupaten Lamongan, Propinsi Jawa Timur pada bulan Maret sampai Juni Di ketinggian 7 meter diatas permukaan laut.
Hasil penelitian menunjukkan bahwa Pemberian pupuk sesuai dosis rekomendasi petani (anorganik) menunjukkan perbedaan nyata tertinggi dibandingkan tanpa pemupukan pada variabel pertumbuhan tinggi tanaman dan jumlah anakan. Pemberian Chromolena odorata segar 7 t/ha menunjukkan beda nyata tertinggi pada variabel pertumbuhan tinggi tanaman. Pemberian Chromolena odorata segar 7 t/ha dengan pemupukan dosis rekomendasi petani (anorganik) menunjukkan perbedaan nyata pada variabel pertumbuhan jumlah anakan dan variabel hasil bobot kering panen (5.08 t/ha) serta bobot kering giling (4.3 t/ha
Threes Get Degrees? Evaluating the Performance of AP-3 Students and AP Credit Acceptance Policy at ASU
No full textabstract: The goal of this study is to test the assumption that an AP score of 3 is equivalent to a C and gain an understanding of how AP-3 students are performing academically at ASU and how to interpret a 3 when evaluating ASU AP credit acceptance policy. Of primary interest is comparing the performance of AP-3 students to those non-AP students that got a C or higher in the corresponding course. To accomplish this, a tabular analysis of academic performance by AP score is conducted using aggregate student data from the ASU 2012-2014 cohorts. Among the performances considered are GPA, time to graduation, performance in the corresponding and following course at ASU, and more. Following this, a model is estimated for the impact that a 3 has on a student’s time to graduation when compared to non-AP students that got a C in the corresponding course. (abstract
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