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Journal articles on the topic 'PVD'

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Author: Grafiati
Published: 4 June 2021
Last updated: 8 June 2024

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1

Hidayah, Meylani Nurul, Hary Christady Hardiyatmo, and Agus Darmawan Adi. "Study Of Various Types Of Pvd And Ph.D. Joints On Vertical Drainage Performance." Jurnal Indonesia Sosial Teknologi 4, no. 10 (October 25, 2023): 1694–702. http://dx.doi.org/10.59141/jist.v4i10.750.

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An important factor for increasing the effectiveness of the PVD (Prefabricated Vertical Drains) is the value of sufficient discharge capacity so that the PVD can work optimally. The use of PVD is usually accompanied by the use of PHD (Prefabricated Horizontal Drains) as horizontal drainage and combined with preloading. In the field, the connection is made by winding the PVD to the PHD and then tying it with cable ties. The connection system can cause deformation at the top of the PVD thereby reducing the effectiveness of the PVD discharge capacity. This study aims to find the optimal PVD-PHD connection system for the discharge capacity which is affected by confinement pressure, overburden pressure, and hydraulic gradient with a PVD-PHD connection system discharge capacity tester. The test specimens used were PVD (5mm thick; 100mm wide) and Ph.D. (20 mm thick; wide: 100 mm, 200mm, and 300mm). 4 types of connection systems have been tried, namely connections A1 and A2 where the PHD is connected in a horizontal position, and connections B1 and B2 where the PHD is connected in a vertical position. Of the four connection systems B1, the connection system has the largest discharge capacity value and a significant increase in PHD width from 100 mm to 300 mm with an increase of 7.694% at 50 kPa overburden pressure and 1.0 hydraulic gradient the highest compared to other connection types
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2

Gou, Ruyi, Xiaodong Zhang, Chunyu Feng, and Xin Wei. "Microstructure and Mechanical Properties Comparative Analysis of TiN Coated on Cemented Carbide." Journal of Computational and Theoretical Nanoscience 14, no. 1 (January 1, 2017): 441–47. http://dx.doi.org/10.1166/jctn.2017.6342.

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The cemented carbide of natural gas throttle valve has serious erosion phenomenon in natural gas exploitation. The titanium nitride (TiN) coating on cemented carbide is an effective method to prevent failure of cemented carbide. Three different processes physical vapor deposition (PVD), chemical vapor deposition (CVD) and plasma chemical vapor deposition (PCVD) are used to deposit TiN coating on cemented carbide. The experiments carried on the scanning electron microscopy, the digital micro hardness tester and scratch tester. The results indicate TiN coating deposited by PVD has characteristics of dense structure, uniform thickness, smooth surface. The coating hardness from big to small: PVD > PCVD > CVD. The coating elasticity modulus from big to small: PCVD > CVD > PVD. The bonding force between coating and substrate from big to small: PVD > CVD > PCVD. The results demonstrate that TiN coating deposited by PVD mechanical properties are superior to TiN coating deposited by CVD and PCVD.
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3

Septian, Septian Fajar Nugraha. "PELAKSANAAN PEMADATAN TANAH PROYEK JALAN TOL (METODE PREFABRICATED VERTICAL DRAIN) AKSES BANDARA INTERNASIONAL JAWA BARAT PAKET 1 ( STA 0+000 – STA 1+850 )." SEMINAR TEKNOLOGI MAJALENGKA (STIMA) 6 (November 3, 2022): 22–27. http://dx.doi.org/10.31949/stima.v6i0.747.

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Proyek Jalan Tol Akses Bandara Internasional Jawa Barat merupakan penambahan lingkup Jalan Tol Cipali yang diharapkan akan menghubungkan Kota Bandung dan sekitarnya melalui Jalan Tol Cisumdawu menuju ke Bandara Internasional Jawa Barat di Kertajati. Tujuan dari kerja praktek pada proyek pembangunan Jalan Tol akses Bandara Internasional Jawa Barat adalah memberikan pengalaman visual dan pengenalan bagi mahasiswa tentang suatu kegiatan pembangunan fisik yang nyata dan segala aspeknya yang meliputi aspek kerekayasaan, kontraktual dan administratif serta pelaksanaannya di lapangan, agar mahasiswa mempunyai pengetahuan dan pemahaman atas masalah tersebut. Kedua, mengenal struktur Jalan Tol secara langsung selama masa konstruksi. Ketiga, mengenal tahapan - tahapan metode pelaksaan pekerjaan di Jalan Tol akses Bandara Internasioanl Jawa Barat khususnya pekerjaan soil improvement menggunakan PVD dan PHD. Keempat, mengetahui alat dan material yang digunakan dalam pelaksanaan soil improvement menggunakan PVD dan PHD. Kelima, mengetahui kendala yang mempengaruhi suatu pelaksanaan pekerjaan soil improvement menggunakan PVD dan PHD. Metode PVD dan PHD dimaksudkan untuk mempercepat penurunan dan meningkatkan daya dukung tanah asli yang lunak dengan mengurangi kadar air maupun kadar udara pada butiran tanah sehingga dapat mempercepat penurunan jangka panjang dan perbedaan penurunan (differential settlement). Metode perbaikan tanah lunak dengan menggunakan PVD menghasilkan waktu penurunan yang lebih cepat Karena PVD memiliki permeabilitas lebih besar. Kata kunci: proyek jalan tol, Metode perbaikan tanah, PVD, PHD,
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4

Yamawaki, Masahiro, Yosuke Honda, Kenji Makino, Takahide Nakano, Yasunori Iida, Fumiaki Yashima, Hiroshi Ueno, et al. "Influence of polyvascular disease on clinical outcome in patients undergoing transcatheter aortic valve implantation via transfemoral access." PLOS ONE 16, no. 12 (December 2, 2021): e0260385. http://dx.doi.org/10.1371/journal.pone.0260385.

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Background The influence of polyvascular disease (PVD) on the short- and long-term clinical outcomes of patients undergoing transcatheter aortic valve implantation via trans-femoral access (TF-TAVI) has not been fully elucidated. Methods A total of 2167 patients from the Optimized CathEter vAlvular iNtervention-TAVI (OCEAN-TAVI) registry who underwent TF-TAVI was studied. PVD was defined as the presence of at least two of the following vascular bed (VB) diseases: concomitant coronary artery disease (CAD), cerebrovascular disease (CVD), and peripheral artery disease (PAD). Results Patients with PVD (288 patients, 13.3%) had a higher incidence of in-hospital complications, such as AKI (16.3% vs. 7.0%, p<0.01) and disabling stroke (3.5% vs. 1.2%, p<0.01) than patients without PVD. These complications caused higher rates of procedural mortality (4.5% vs. 2.0%, p<0.01). PVD increased the risk of the 2-year rate of cardiovascular death (adjusted hazard ratio [HR], 1.61; 95% confidence interval [CI], 1.04–2.50; p<0.05); however, non-cardiovascular death, myocardial infarction, or ischemic stroke was not associated with PVD. Worsening heart failure (4.6% vs. 1.1%, p<0.01) was the main cause of cardiovascular death among patients with PVD. In a sub-analysis, compared with patients with AS alone, those with 2 VB diseases (CAD+PAD; adjusted HR, 1.93; 95% CI, 1.06–3.53; p<0.05) and 3 VB diseases (CAD+CVD+PAD; adjusted HR, 2.61; 95% CI, 1.21–5.62; p<0.05) had a higher risk of 2-year cardiovascular death. Conclusions The increased prevalence of concomitant atherosclerotic VB diseases before TF-TAVI may increase the rates of in-hospital complications and 2-year cardiovascular death. Given the higher rate of mortality in patients with PVD undergoing TF-TAVI, future studies focusing on medical therapy are needed to reduce long-term cardiovascular events in this high-risk subset.
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5

Pierre, Clémentine, Audrey Leroy, Adeline Pierache, Laurent Storme, Véronique Debarge, Sandrine Depret, Thameur Rakza, Charles Garabedian, and Damien Subtil. "Is vaginal delivery of a fetus in breech presentation at an extremely preterm gestational age associated with an increased risk of neonatal death? A comparative study." PLOS ONE 16, no. 10 (October 20, 2021): e0258303. http://dx.doi.org/10.1371/journal.pone.0258303.

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Background The effect on neonatal mortality of mode of delivery of a fetus in breech presentation at an extremely preterm gestational age remains controversial. Objective To compare mortality associated with planned vaginal delivery (PVD) of fetuses in breech presentation with that of fetuses in breech presentation with a planned cesarean delivery (PCD). Material and methods Retrospective study reviewing records over a 19-year period in a level 3 university referral center of singleton infants born between 25+0 and 27+6 weeks of gestation, alive on arrival in the delivery room, and weighing at least 500 grams at birth. Infants in the first group were in breech presentation with PVD and the second in breech presentation with PCD. The principal endpoint was neonatal death. Results During the study period, we observed 113 breech presentations with PVD, and 80 breech presentations with PCD. Although not significant after adjustment, neonatal mortality in the breech PVD group was more than twice that of the breech PCD group (19.5 vs 7.8%, P = 0.031, ORa = 2.6, 95% CI 0.8–9.3, NNT = 8). This higher neonatal mortality in the breech PVD group was exclusively associated with a higher risk of death in the delivery room (12.4 vs 0.0% P = 0.001, OR not calculable, NNT = 8). In these extremely preterm breech presentations with PVD, neonatal mortality in the delivery room was associated with entrapment of the aftercoming head, cord prolapse, and a short duration of labor. Conclusion For deliveries between 25+0 and 27+6 weeks’ gestation, vaginal delivery in breech presentation is associated with a higher risk of death in the delivery room.
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6

Firmansyah, Hafiz, and M. Afief Ma'ruf. "THE ANALYSIS OF HORIZONTAL DRAIN DESIGN IN SOFT SOIL REINCFORCEMENT." CERUCUK 3, no. 1 (September 19, 2019): 35. http://dx.doi.org/10.20527/crc.v3i1.1103.

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To help the process of consolidation of the soil, On the port access road Trisakti using Prefabricated Vertical Drain (PVD) materials. Of the work (PVD) thing to note is the horizontal drainage, because it was feared the absence of Horizontal Drain work item function of PVD become non-optimal even it might does not work, so the necessary design analysis of Horizontal Drain that can be used on the project. Analysis of Horizontal Drain design is intended to get the Horizontal Drain design alternatives the most optimal based on quality, cost and time.The methods used in the analysis of the design of Horizontal Drain this is a soft soil improvement method using PVD with attention to soil degradation and the planning of the heap.In the design of the installation of PVD method using static, obtained the degree of consolidation of 90% takes 9.33 months. The calculation of Horizontal Drain in the discharge value must be in flush in one horizontal drain line is (minimum permeability). From the results of the analysis there is some material horizontal drain of qualified (in terms of time, cost and quality of workmanship) then get : Rough sand (10.93, Rp. 24.050.000.000,-, and 9.4 months), Fine sand (16.24, Rp-16,835,000,000.0, and 9.4 months), PHD (Horizontal Prefabricated Drain) (74.01, Rp-13,101,140,000.0, and 5.6 months) so that it can be concluded that the material PHD (Horizontal Prefabricated Drain) the most efficient in terms of quality, cost, and time. Keywords: Consolidation, Degrees of consolidation, Horizontal Drain, Preloading, Prefabricated Vertical Drain (PVD), Prefabricated Horizontal Drain (PHD).
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7

S. P., Preethi, and Tejaswi Hemachandran. "Serum homocysteine as a predictor of severity of peripheral arterial disease in association with Doppler ultrasonography." International Surgery Journal 6, no. 11 (October 24, 2019): 3977. http://dx.doi.org/10.18203/2349-2902.isj20195108.

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Background: To evaluate association between raised serum homocysteine levels and severity of peripheral vascular disease (PVD) and to assess the role of homocysteine as a prognostic marker in PVD and thereby aid in early referrals to prevent cerebral and coronary events in those patients and introduce homocysteine lowering with vitamin therapy as part of medical management in patients diagnosed with PVD.Methods: The serum homocysteine levels was measured in all patients admitted for peripheral vascular disease of upper and/or lower limb and to correlate the above values with Doppler ultrasonography (USG) in the duration between 2016-2018 (18 months).Results: The comparison of homocysteine levels with Doppler shows corresponding significant increase in Serum Hcy levels only in cases of moderate PVD. Statistical analysis with binary logistic regression does show a significant association with moderate severity of PVD and serum homocysteine levels with 66.7% predictability.Conclusions: There was significant association of homocysteinemia only in Moderate PVD with no statistically significant correlation with mild, severe cases of peripheral arterial disease (PAD) and radiological normal cases, further large randomised trials are required to elucidate its clinical relevance in PAD as a prognostic marker of severity.
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8

Ivinza Lepapa, Alphonse-Christian. "Du modèle d’alignement stratégique des TI au Leapfrog : Structure causale ou systémique." Acta Europeana Systemica 8 (July 10, 2020): 241–54. http://dx.doi.org/10.14428/aes.v8i1.56423.

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Cet article a pour objectif de mettre en avant l’analyse des «Impacts Organisationnels des TIC » qui utilisent les approches systèmes et qui font appel à l’utilisation des modèles. Le centre d’intérêt se situe dans l’école de la conception de systèmes. Après une brève présentation du modèle d’alignement stratégique (SAM : Strategic Alignement Model, 1991, p.172) de Vankatramam, nous introduisons le concept de Leapfrog. L’environnement de l’étude concerne les pays en voie de développement (PVD) et les pays sous développé (PSD). Aussi, nous pouvons considérer la RDC et les autres pays africains qui font partie de notre échantillon comme étant des PVD ou des PSD.La Crise managériale dans les entreprises des PSD et PVD est abordée en deux points: d’abordnous rappelonsla classification des pays suivant le potentiel de développement informatique (CIDP - Computer Industrial Development Potential), et ensuite, nous évoquons les facteurs de crise managériale dans ces pays (en Afrique). L’examen de la résolution des crises managériales des PVD et PSD est effectué sous deux angles. D’abord par un survol du Leapfrog en Afrique: Royaume de l’innovation. Ensuite par l’analyse de l’informatisation des entreprises congolaises suivant le modèle d’alignement stratégique (Ivinza Lepapa, 2007). Comment les PVD et les PSD adoptent les TIC? Nous repartons d’un échantillon d’une thèse de doctorat réalisée à l’ULB (Ivinza Lepapa et Wilikin Luc, Solvay 2007) nous expliquons et explorons comment l’adoption des TIC dans ces pays ne respectait pas une structure causale linéaire comme dans les pays occidentaux. Mais effectuaient drôlement un bond organisationnel qui migrait vers une structure systémique que les économistes de développement appellent aujourd’hui Leapfrog.
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9

Silva, R. M., J. C. Souza, H. J. Fernandes, U. G. P. Abreu, P. B. Ferraz Filho, and A. N. Rosa. "Eficiência produtiva ao desmame de vacas Nelore criadas no Pantanal." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 67, no. 4 (August 2015): 1105–10. http://dx.doi.org/10.1590/1678-4162-6909.

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O trabalho objetivou avaliar a eficiência produtiva de vacas ao desmame de acordo com seu tamanho (peso) e estimar correlação fenotípica entre as características peso do bezerro ao desmame (PBD), peso da vaca ao desmame do bezerro (PVD) e relação desmame (RD = PBD/ PVD) de animais da raça Nelore criados no Pantanal de Mato Grosso do Sul. Foram utilizadas 706 observações para pares de dados de pesos de vacas e de bezerros da raça Nelore ao desmame criados em regime de pastejo. Foram formados seis grupos com base no peso de vaca ao desmame (GPVD) a partir dos desvios (40,73kg) de peso em relação à média geral do rebanho (420,56kg). Os grupos de vacas com menores pesos obtiveram maiores RD. As correlações fenotípicas entre PVD e PBD variaram de 0,05 a 0,26, enquanto para PVD e RD as correlações foram negativas e com variação de 0,11 a 0,25. As correlações fenotípicas entre PBD e RD apresentaram-se positivas e de alta magnitude (0,91 a 0,98). As maiores eficiências produtivas foram determinadas para vacas de pequeno a médio porte (327,20 a 438,62kg), além de estas serem menos exigentes quanto a nutrientes digestíveis totais (NDT). A seleção de vacas de tamanho médio (379, 83 a 461,29kg) apresenta-se mais vantajosa por gerar menor custo de mantença que as vacas maiores e produzir bezerros mais pesados que as vacas menores.
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10

Al Harits, Ahmad Yasin, and Istiatun Istiatun. "PERBANDINGAN METODE PRELOADING DENGAN VAKUM KONSOLIDASI TANAH PADA PEMODELAN DI LABORATORIUM." PROKONS Jurusan Teknik Sipil 15, no. 1 (February 28, 2021): 57. http://dx.doi.org/10.33795/prokons.v15i1.282.

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ABSTRACT This study aims to determine the parameter comparison of the magnitude of the primary reduction and consolidation time in the preloading method using PVD and vacuum method using PVD with modeling in the laboratory. The benefit of this research is that it can provide a comparison of the preloading method and the vacuum method in terms of accelerating the consolidation time as well as contributing to science in the field of soil improvement. Primary consolidation theory is used in this research. Quantitative descriptive research method with testing data collection techniques by means of modeling in the laboratory. The modeling of the vacuum method used a test tub measuring (1.2 × 0.6 × 0.9) m, the vacuum pump suction capacity of 5 Pa, the air hose as PHD and geomembrane cloth as PVD material. The preloading method with PVD uses a test tub measuring (0.8 × 0.6 × 0.9) m, preloading load in the form of bangka sand (ɣ = 1.532 t / m³) with a thickness of 10 cm and a geomembrane cloth as PVD material. In each test basin filled with soil and water with a soil volume weight of 1.3 t / m³, a ground surface height of 0.5 m and a groundwater level of 0.42 m. The results showed that with the same amount of reduction, namely 7.26 mm preloading method using PVD took 81 hours while in the vacuum method the time needed was 41 hours. Thus it can be concluded that the reduction in the vacuum method is faster than the preloading method with PVD. Keywords: Primer settelment, PVD, Vacum, consolidation time
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11

Pothiraksanon, C., J. Saowapakpiboon, D. T. Bergado, and N. Y. Than. "Reduction of smear effects around PVD using thermo-PVD." Proceedings of the Institution of Civil Engineers - Ground Improvement 161, no. 4 (November 2008): 179–87. http://dx.doi.org/10.1680/grim.2008.161.4.179.

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12

NOMURA, Hirorou. "PVD Coating for Die and Durability of PVD Coating." Journal of the Japan Society for Technology of Plasticity 56, no. 650 (2015): 171–75. http://dx.doi.org/10.9773/sosei.56.171.

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13

Bergado, Dennes T., Salisa Chaiyaput, Suthasinee Artidteang, and Trong Nghia Nguyen. "Microstructures within and outside the smear zones for soft clay improvement using PVD only, Vacuum-PVD, Thermo-PVD and Thermo-Vacuum-PVD." Geotextiles and Geomembranes 48, no. 6 (December 2020): 828–43. http://dx.doi.org/10.1016/j.geotexmem.2020.07.003.

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14

ZHU, Yaocan, Hideyoshi KINOSHITA, and Yoshiki SAKAMOTO. "PVD Coated Tool." Journal of the Japan Society for Precision Engineering 86, no. 11 (November 5, 2020): 853–57. http://dx.doi.org/10.2493/jjspe.86.853.

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15

Esser, Stefan. "PVD Produktion optimieren." Vakuum in Forschung und Praxis 22, no. 6 (December 2010): 16–19. http://dx.doi.org/10.1002/vipr.201000436.

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16

Gold, P. W., J. Loos, and M. Kuhn. "Leistungsfähige PVD-Wälzlagerbeschichtungen." Materialwissenschaft und Werkstofftechnik 34, no. 1011 (October 2003): 919–23. http://dx.doi.org/10.1002/mawe.200300679.

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17

Borovsky, G., S. Grigoryev, and S. Molodyk. "Gas-tight PVD coatings." Nanoindustry Russia, no. 3 (2015): 40–43. http://dx.doi.org/10.22184/1993-8578.2015.57.3.40.43.

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18

Gonzalez, Edgar R., Rhonda B. Liberto, H. Edward Davidson, Thomas M. Chamberlain, and Marilyn A. Mendelson. "Disease-Based Assessment of Peripheral Vascular Disease in Nursing Facility Patients." Annals of Pharmacotherapy 29, no. 7-8 (July 1995): 671–75. http://dx.doi.org/10.1177/106002809502907-803.

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Objective: To determine the frequency of diagnosis of peripheral vascular disease (PVD) and selected related conditions in patients in a nursing facility, to determine the frequency of patients with risk factor(s) for or clinical evidence of PVD but without a diagnosis of PVD or a related condition, and to determine the frequency with which patients with and without a diagnosis of PVD or a related condition were treated with drug and nondrug therapies. Design: A multicenter, disease-based, retrospective evaluation. Settings: 41 nursing facilities in 6 regions of the US. Patients: 4038 patients in a nursing facility: 827 patients with a PVD or related diagnosis; 2719 patients without a PVD or related diagnosis but with risk factor(s) for or clinical evidence of PVD; and 492 patients without a PVD or related diagnosis, risk factor(s), and clinical evidence. Main Outcome Measures: Evidence of disease and drug therapy for PVD. Results: PVD was documented in 21% of patients; another 67% had risk factor(s) for or clinical evidence of PVD but no diagnosis of PVD or a related condition. Pentoxifylline was prescribed for 3% of the total sample and 12% of patients with PVD or a related condition. Conclusions: PVD appears to be inadequately evaluated in patients in a nursing facility. Disease treatment strategies should be developed and implemented to educate healthcare professionals and the general public about the need to acknowledge, assess, and treat PVD and related conditions.
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Andini, Citra Kusuma, Yelvi Yelvi, Azmi Lisani Wahyu, Handi Sudardja, and Merley Misriani. "Penerapan Soil Preloading, PVD, dan PHD untuk Analisis Penurunan Konsolidasi Tanah." Jurnal Ilmiah Rekayasa Sipil 20, no. 2 (October 28, 2023): 179–89. http://dx.doi.org/10.30630/jirs.v20i2.1158.

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Soft clay has a low bearing capacity, high compressibility and low permeability. This condition causes soft clay soil to have a long settlement time. To overcome this soft soil condition, soil improvement methods are needed. One of the efforts is to use a combination of soil preloading methods, Prefabricated Vertical Drain (PVD), and Prefabricated Horizontal Drain (PHD) methods. Calculating soil settlement with soil improvement is carried out using the Asaoka method, which is a field observation method, and the theoretical method using the Terzaghi method. Based on the calculation results of field observations using the Asaoka method, the average degree of soil settlement is 93.5%. The calculation results of the Asaoka method are recalculated using a back calculation to produce a new parameter value, namely the horizontal consolidation (Ch) value, which is then compared with the Ch value in the previous plan. In the Terzaghi method, the average soil settlement value is 1.205 meters. The results of soil settlement value are used to analyze the height of the embankment based on the load ratio requirement in SNI 8460: 2017, where the load ratio on the ground is ≥ 1.3 times the planned load under service conditions. Based on the monitoring results, a load ratio value of 0.875 was obtained so that the SNI requirements carried out a re-planning of the landfill. Then, proceed with the design of PVD and PHD. The results obtained in planning use triangular PVD patterns with a distance between PVDs of 1 meter.
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20

Loper, Joyce E., and Marcella D. Henkels. "Utilization of Heterologous Siderophores Enhances Levels of Iron Available to Pseudomonas putida in the Rhizosphere." Applied and Environmental Microbiology 65, no. 12 (December 1, 1999): 5357–63. http://dx.doi.org/10.1128/aem.65.12.5357-5363.1999.

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ABSTRACT Pseudomonas spp. have the capacity to utilize siderophores produced by diverse species of bacteria and fungi, and the present study was initiated to determine if siderophores produced by rhizosphere microorganisms enhance the levels of iron available to a strain of Pseudomonas putida in this natural habitat. We used a previously described transcriptional fusion (pvd-inaZ) between an iron-regulated promoter (pvd) and the ice nucleation reporter gene (inaZ) to detect alterations in iron availability toP. putida. Ice nucleation activity (INA) expressed from thepvd-inaZ fusion by P. putida N1R or N1R Pvd−, a derivative deficient in the production of a pyoverdine siderophore, was inversely related to the concentration of ferric citrate in a culture medium. In culture, INA expressed by N1R Pvd− (pvd-inaZ) was reduced in the presence of the ferric complex of pseudobactin-358, a pyoverdine siderophore produced by P. putida WCS358 that can be utilized as a source of iron by N1R Pvd−. In the rhizosphere of cucumbers grown in sterilized soil, N1R Pvd− (pvd-inaZ) expressed INA, indicating that iron availability was sufficiently low in that habitat to allow transcription of the iron-regulated pvd promoter. Coinoculation with WCS358 or N1R significantly decreased INA expressed by N1R Pvd− (pvd-inaZ) in the rhizosphere, whereas coinoculation with a pyoverdine-deficient mutant of WCS358 did not reduce INA expressed by N1R Pvd−(pvd-inaZ). These results indicate that iron availability to N1R Pvd−(pvd-inaZ) in the rhizosphere was enhanced by the presence of another strain of P. putida that produces a pyoverdine that N1R Pvd−(pvd-inaZ) was able to utilize as a source of iron. In culture, strain N1R Pvd− also utilized ferric complexes of the siderophores enterobactin and aerobactin as sources of iron. In the rhizosphere of cucumbers grown in sterilized soil, INA expressed by N1R Pvd− (pvd-inaZ) was reduced in the presence of strains of Enterobacter cloacae that produced enterobactin, aerobactin, or both siderophores, but INA expressed by N1R Pvd−(pvd-inaZ) was not altered in the presence of a mutant of E. cloacae deficient in both enterobactin and aerobactin production. Therefore, the iron status of P. putida was altered by siderophores produced by an unrelated bacterium coinhabiting the rhizosphere. Finally, we demonstrated that INA expressed by N1R containing pvd-inaZ in the rhizosphere differed between plants grown in sterilized versus nonsterilized field soil. The results of this study demonstrate that (i) P. putida expresses genes for pyoverdine production and uptake in the rhizosphere, but the level of gene expression is influenced by other bacteria that coexist with P. putida in this habitat, and (ii) diverse groups of microorganisms can alter the availability of chemical resources in microbial habitats on root surfaces.
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Greenwald, Jason, Gabrielle Zeder-Lutz, Agnès Hagege, Hervé Celia, and Franc Pattus. "The Metal Dependence of Pyoverdine Interactions with Its Outer Membrane Receptor FpvA." Journal of Bacteriology 190, no. 20 (July 18, 2008): 6548–58. http://dx.doi.org/10.1128/jb.00784-08.

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ABSTRACT To acquire iron, Pseudomonas aeruginosa secretes the fluorescent siderophore pyoverdine (Pvd), which chelates iron and shuttles it into the cells via the specific outer membrane transporter FpvA. We studied the role of iron and other metals in the binding and transport of Pvd by FpvA and conclude that there is no significant affinity between FpvA and metal-free Pvd. We found that the fluorescent in vivo complex of iron-free FpvA-Pvd is in fact a complex with aluminum (FpvA-Pvd-Al) formed from trace aluminum in the growth medium. When Pseudomonas aeruginosa was cultured in a medium that had been treated with a metal affinity resin, the in vivo formation of the FpvA-Pvd complex and the recycling of Pvd on FpvA were nearly abolished. The accumulation of Pvd in the periplasm of Pseudomonas aeruginosa was also reduced in the treated growth medium, while the addition of 1 μM AlCl3 to the treated medium restored the effects of trace metals observed in standard growth medium. Using fluorescent resonance energy transfer and surface plasmon resonance techniques, the in vitro interactions between Pvd and detergent-solubilized FpvA were also shown to be metal dependent. We demonstrated that FpvA binds Pvd-Fe but not Pvd and that Pvd did not compete with Pvd-Fe for FpvA binding. In light of our finding that the Pvd-Al complex is transported across the outer membrane of Pseudomonas aeruginosa, a model for siderophore recognition based on a metal-induced conformation followed by redox selectivity for iron is discussed.
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Maranian, Mel, and Martin Snead. "A Novel Transcriptome Approach to the Investigation of the Molecular Pathology of Vitreous and Retinal Detachment." Genes 13, no. 10 (October 18, 2022): 1885. http://dx.doi.org/10.3390/genes13101885.

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Retinal detachment (RD) is one of the most common, sight-threatening ocular conditions requiring emergency intervention. Posterior vitreous detachment (PVD) occurs in the majority of an aging population whereby the vitreous body separates from the retina. It is well established that PVD is the common precursor to the most common forms of RD; however, it remains unknown why in most individuals PVD will cause no/few complications (physiological PVD) but in a small percentage will cause retinal tears and detachment (pathological PVD). Despite over 100 years of scientific research, the anatomical definitions of PVD and its pathogenesis remain controversial. Recent research has identified a novel cell population (laminocyte), present at significantly higher numbers in pathological PVD when compared to physiological PVD. We review and summarise the seven distinct clinical sub-groups of retinal breaks and focus on the role of the laminocyte in those secondary to PVD and the transcriptomic profile of this unique cell. Provisional whole transcriptome analysis using bulk RNA-Seq shows marked differentially expressed genes when comparing physiological PVD with PVD associated with RD. The limitations of bulk RNA-Seq are considered and the potential to address these using spatial transcriptomics are discussed. Understanding the pathogenesis of PVD-related retinal tears will provide a baseline for the development of novel therapeutic targets and prophylactic treatments.
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Waldstein, Sebastian M., Leonard Coulibaly, Sophie Riedl, Amir Sadeghipour, Bianca S. Gerendas, and Ursula Margarethe Schmidt-Erfurth. "Effect of posterior vitreous detachment on treat-and-extend versus monthly ranibizumab for neovascular age-related macular degeneration." British Journal of Ophthalmology 104, no. 7 (September 28, 2019): 899–903. http://dx.doi.org/10.1136/bjophthalmol-2019-314661.

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AimsTo investigate the impact of posterior vitreous detachment (PVD) on the efficacy of treat-and-extend (T&E) ranibizumab in neovascular age-related macular degeneration.MethodsIn a post hoc analysis of a randomised controlled clinical trial, spectral-domain optical coherence tomography images of treatment-naïve patients randomised to receive T&E (n=265) or monthly (n=264) ranibizumab for 12 months were included. Certified, masked graders diagnosed the presence or the absence of complete PVD. The main outcome measures were the mean change in best-corrected visual acuity (BCVA) and central retinal thickness (CRT) at month 12, the number of administered ranibizumab injections and the proportion of patients extended to more than 8 weeks.ResultsAt baseline, complete PVD was present in 51% and 56% of patients in the monthly and T&E arms, respectively. Mean change in BCVA at month 12 was +9.0 (PVD) vs +9.5 letters (no PVD, p=0.78) in monthly treated eyes, and +6.0 (PVD) vs +7.5 letters (no PVD, p=0.42) in T&E treated eyes. Conversely, mean change in CRT at month 12 was −174 (PVD) vs −173 µm (no PVD, p=0.98) in the monthly arm, and −175 (PVD) vs −164 µm (no PVD, p=0.58) in the T&E arm. In T&E treated patients, the median number of injections was eight vs nine (p=0.035). 71% of PVD eyes were extended successfully, compared with 55% of eyes without PVD (p=0.005).ConclusionPVD was not found to impact functional and anatomical outcomes of T&E ranibizumab therapy. However, patients without a complete PVD required more retreatments and were significantly less likely to be successfully extended.Trial registration numberNCT01948830
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Iskandar, Kamal Hasan, and Asep Sapei. "Pemampatan Tanah Lunak pada Berbagai Kedalaman Prefabricated Vertical Drain di Reklamasi Pelabuhan Belawan, Kota Medan." Jurnal Teknik Sipil dan Lingkungan 7, no. 1 (April 1, 2022): 1–16. http://dx.doi.org/10.29244/jsil.7.1.1-16.

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Proyek reklamasi Pelabuhan Belawan tahap II direncanakan sebagai area penyimpanan kontainer. Berdasarkan tes penyelidikan tanah (SPT test), tanah pada lokasi ini diklas-ifikasikan sebagai tanah lunak dengan kedalaman 11 m. Oleh karena itu, penting untuk meningkatkan stabilitas tanah karena tanah tersebut memiliki kompresi potensial yang besar. Metode yang digunakan adalah Preloading dan Prefabricated Vertical Drain (PVD). Kedalaman PVD yang dipilih memiliki perbedaan dampak dan pengaruh terhadap performansinya. Penelitian ini dilaksanakan untuk menentukan kedalaman PVD yang optimum untuk menahan kompresi dan waktu setlemen dengan derajat konsolidasi sebesar 90%. Variasi kedalaman PVD yang digunakan adalah 0%, 25%, 50%, 75% dan 100% dari kedalaman tanah. Hasil analisis menunjukkan bahwa lokasi yang potensial terjadi subsiden adalah 2.4 m. Tanpa PVD, membutuhkan waktu 50.670 hari untuk mencapai 90% konsolidasi. Sedangkan dengan PVD, hanya membutuhkan 66-69 hari tergantung dari prosentase kedalaman PVD. Semakin dalam PVD, semakin kecil kom-presi residunya. Kedalaman 50% PVD merupakan yang optimum berdasarkan waktu dan residu kompresi dengan total biaya sebesar Rp 7,09 Milyar.
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Voulhoux, Romé, Alain Filloux, and Isabelle J. Schalk. "Pyoverdine-Mediated Iron Uptake in Pseudomonas aeruginosa: the Tat System Is Required for PvdN but Not for FpvA Transport." Journal of Bacteriology 188, no. 9 (May 1, 2006): 3317–23. http://dx.doi.org/10.1128/jb.188.9.3317-3323.2006.

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ABSTRACT Under iron-limiting conditions, Pseudomonas aeruginosa PAO1 secretes a fluorescent siderophore called pyoverdine (Pvd). After chelating iron, this ferric siderophore is transported back into the cells via the outer membrane receptor FpvA. The Pvd-dependent iron uptake pathway requires several essential genes involved in both the synthesis of Pvd and the uptake of ferric Pvd inside the cell. A previous study describing the global phenotype of a tat-deficient P. aeruginosa strain showed that the defect in Pvd-mediated iron uptake was due to the Tat-dependent export of proteins involved in Pvd biogenesis and ferric Pvd uptake (U. Ochsner, A. Snyder, A. I. Vasil, and M. L. Vasil, Proc. Natl. Acad. Sci. USA 99:8312-8317, 2002). Using biochemical and biophysical tools, we showed that despite its predicted Tat signal sequence, FpvA is correctly located in the outer membrane of a tat mutant and is fully functional for all steps of the iron uptake process (ferric Pvd uptake and recycling of Pvd on FpvA after iron release). However, in the tat mutant, no Pvd was produced. This suggested that a key element in the Pvd biogenesis pathway must be exported to the periplasm by the Tat pathway. We located PvdN, a still unknown but essential component in Pvd biogenesis, at the periplasmic side of the cytoplasmic membrane and showed that its export is Tat dependent. Our results further support the idea that a critical step of the Pvd biogenesis pathway involving PvdN occurs at the periplasmic side of the cytoplasmic membrane.
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26

Mumme, Frank. "Kunststoffglanzgrade mit PVD anpassen." ATZproduktion 1, no. 5 (December 2008): 38–43. http://dx.doi.org/10.1007/bf03224087.

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Matthews, A., and A. Leyland. "Entwicklungen bei PVD-Verschleißschutzschichten*." HTM Journal of Heat Treatment and Materials 56, no. 1 (January 1, 2001): 5–13. http://dx.doi.org/10.1515/htm-2001-0002.

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Abstract In den zurückliegenden zwei bis drei Jahrzehnten ist ein bemerkenswerter Fortschritt bei der Entwicklung von PVD-Verschleißschutzschichten erreicht worden. Die Beschichtungen wurden in die Großserienfertigung (wie der Automobilindustrie) jedoch nur langsam übernommen. Dafür gibt es mehrere Ursachen. Eine Ursache ist, dass der Schwerpunkt vieler Forscher offensichtlich bei der Entwicklung harter Schichten lag. Diese „superharten“ oder „ultraharten“ Schichten (und die zugehörigen Verfahren) sind häufig für die billigen (und vergleichsweise weichen) Substrate nicht geeignet, die in der Großserie oft verwendet werden. Die Entwicklungen im Verständnis tribologischer Kontaktvorgänge führten zu der Erkenntnis, dass die Härte (H) möglicherweise nicht die einzige Eigenschaft ist, die den Verschleißwiderstand bestimmt. Wir besprechen hier die Bedeutung des Elastizitätsmoduls (E) und des Verhältnisses H/E für die Bestimmung der Widerstandsfähigkeit einer Oberflächenbeschichtung, insbesondere für deren Fähigkeit, Verformungen des Substrats unter Last auszugleichen. Damit ist die Diskussion neuer mehrschichtiger und Nano-Verbund-Beschichtungen verbunden, mit denen ein vergleichsweise niedriger Elastizitätsmodul bei ausreichender Härte eingestelltwerden kann. Weiterhin werden die Vorteile von Vorbehandlungen und Zwischenschichten beschrieben, mit denen die Tragfähigkeit des Substrats für die Beschichtung verbessert werden kann. Insgesamt stellt die Veröffentlichung einen Überblick über die Möglichkeiten dar, wie heute PVD-Verschleißschutzschichten entwickelt werden können, welche die Anforderungen von Reibungs- und Verschleißbeanspruchungen in der praktischen Anwendung vollständig erfüllen.
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28

Schepens, Charles L. "Macular Holes and PVD." Ophthalmology 103, no. 3 (March 1996): 349–50. http://dx.doi.org/10.1016/s0161-6420(96)30690-8.

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29

Knotek, O., F. Löffler, and L. Wolkers. "Amorphous SiC PVD coatings." Diamond and Related Materials 2, no. 2-4 (March 1993): 528–30. http://dx.doi.org/10.1016/0925-9635(93)90114-h.

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30

Stone, Louise. "Serotonin SNPs in PVD." Nature Reviews Urology 11, no. 11 (September 16, 2014): 600. http://dx.doi.org/10.1038/nrurol.2014.259.

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31

red. "IQWiG-Einschätzung zu PVd." InFo Hämatologie + Onkologie 22, no. 10 (October 2019): 52. http://dx.doi.org/10.1007/s15004-019-6730-7.

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32

Knotek, O., E. Lugscheider, F. Lo¨ffler, B. Bosserhoff, and S. Schmitz. "Superstoichiometric PVD carbide coatings." Materials Science and Engineering: A 209, no. 1-2 (May 1996): 394–98. http://dx.doi.org/10.1016/0921-5093(95)10122-5.

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33

Godse, R. V., and A. T. Santhanam. "Composite CVD + PVD coatings." Materials Science and Engineering: A 209, no. 1-2 (May 1996): 384–88. http://dx.doi.org/10.1016/0921-5093(95)10138-1.

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34

Sander, H., and D. Petersohn. "Mikrotribologie von PVD-Schichten." Materialwissenschaft und Werkstofftechnik 29, no. 9 (September 1998): 506–17. http://dx.doi.org/10.1002/mawe.19980290909.

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35

Spies, H. J., S. Friedrich, and A. Buchwalder. "Elektronenstrahlbehandlung von PVD-Hartstoffschichten." Materialwissenschaft und Werkstofftechnik 34, no. 1 (January 2003): 128–35. http://dx.doi.org/10.1002/mawe.200390004.

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36

Mumme, F., and D. Hortig. "Potentiale moderner PVD-Beschichtungen." Materialwissenschaft und Werkstofftechnik 31, no. 11 (November 2000): 979–88. http://dx.doi.org/10.1002/1521-4052(200011)31:11<979::aid-mawe979>3.0.co;2-c.

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37

Brecher, C., and G. Spachtholz. "PVD-Beschichtungen für Spindellager*." wt Werkstattstechnik online 96, no. 7-8 (2006): 495–501. http://dx.doi.org/10.37544/1436-4980-2006-7-8-495.

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38

Chen, Wen Long, Hong Jian Wu, Min Liu, and Xiao Ling Xiao. "Erosion Behavior of PS-PVD Thermal Barrier Coatings and the Effect of Composite Coating (PS-PVD + APS) Thickness." Materials Science Forum 993 (May 2020): 1095–103. http://dx.doi.org/10.4028/www.scientific.net/msf.993.1095.

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In this work, feather-column 7YSZ thermal barrier coatings (TBCs) were prepared by plasma spray-physical vapor deposition (PS-PVD). The anti-particle erosion test was carried out at room temperature to study the erosion behavior and failure mechanism of PS-PVD TBCs. The results showed that the particle erosion process of the PS-PVD TBCs experienced three stages of high-rate, medium-rate and slow-rate erosion. In order to improve the particle erosion resistance of the PS-PVD TBCs, different thicknesses of dense-layered coatings were prepared on the surface of the PS-PVD TBCs by air plasma spraying (APS). The effect of dense-layered thickness on the erosion behaviour of PS-PVD TBCs was discussed. Experimental results showed that, as the thickness of the dense-layered increased, the erosion resistance of the PS-PVD TBCs enhanced. When the thickness of the dense-layered coating was 5μm, it was not obvious upon the influence on the erosion failure behavior of the PS-PVD TBCs. In the case of a 10μm dense-layered coating, the erosion resistance performance of the PS-PVD TBCs improved by about 30%. While the erosion resistance performance of the PS-PVD TBCs increased almost 4 times when the thickness of the dense layer reached 20μm.
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39

Wan Mahmood, Wan Hasrulnizzam, Mohd Nizam A. Rahman, Md Deros Baba, and Ahmad Rasdan Ismail. "Product and Vendor Development Programme in Encouraging Supply Chain Management: A Case Study." Applied Mechanics and Materials 44-47 (December 2010): 4141–45. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.4141.

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This paper reviews the methods used by an automotive manufacturer in enhancing the Supply Chain Management (SCM) system through a setup termed as Product and Vendor Development Programme (PVD). PVD was developed to eliminate problems faced due to late delivery and poor quality of supplies and availability of supplies at the lowest possible costs. The paper explores the methodologies that have been employed by the PVD. Results overtime show that the PVD has improved the SCM system especially in the areas of quality and delivery services, other services and as well as cutting costs that manufacturers had to face due to problems that arose in the shortcomings of the supply services. The PVD has managed to promote the Localization Programme and has also been able to establish qualified vendors. Findings also establish that the PVD team is the key to the success for development of the PVD programme. The paper presents an original discussion about viewing PVD programme from a successful automotive manufacturer.
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40

Mansur, Awal, Roesyanto ., and Rudi Iskandar. "Deterioration Analysis and Consolidation Time Using Terzaghi 1-D Method and 3D Plaxis Modeling: A Case Study of the Tebing Tinggi Toll Road Development Project - Indrapura STA. 103 + 200." International Journal of Research and Review 9, no. 2 (February 15, 2022): 165–73. http://dx.doi.org/10.52403/ijrr.20220224.

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Land transportation has an important role in the transportation sector. Road infrastructure is growing rapidly to meet basic human needs which increasingly require rapid movement for distribution of basic needs and other logistics. Soil has the characteristics of a relatively low bearing capacity and relatively large compression and lasts a relatively long time. One of the factors that cause soft soil to have a low bearing capacity is having a high water content. The high level of compressibility in soft soils is caused by the high void ratio. The development of preloading and vertical drainage methods is also combined with the use of horizontal drainage. Preloading works to compress the subgrade. PVD (Prefebricate Vertical Drain) serves to accelerate the process of soil compaction. PHD (Prefebricate Horizontal Drain) works to drain pore water from the PVD in a horizontal direction to the outside of the embankment. Located on the Tebing Tinggi Toll Road Construction Project – Kisaran (Phase 1), the Tebing Tinggi Inderapura Toll Road in zone 3 Sta 103 +200. The purpose of writing this thesis is to analyze the magnitude of the settlement and consolidation time using analytical methods and using modelling in PLAXIS 3D. Analyzing the effect of the smear zone due to PVD erection using a mandrel. Analyzing the effectiveness of using PHD as horizontal drainage. Knowing the pore water pressure that occurs. Comparing the results of PLAXIS 3D modelling with data settlement in the field. The calculation of the consolidation settlement using the 1-dimensional Terzaghi method was obtained at 102,46 mm. This result is relatively close to the conditions that occur in the field, where the decrease in the SP-132 settlement plate in the field is 103 mm and the decrease in Asaoka is 102 mm. The consolidation time required when there is a decrease of 100 mm in PLAXIS 3D modelling with a smear zone effect is 243 days and without a smear, the zone effect is 240 days. The required consolidation time without the use of PHD is 242 days and the consolidation time from the data settlement plate 132 (SP-132) is 239 days. Calculation of settlement and consolidation time using PLAXIS 3D modelling by taking into account the effect of the smear zone gives results that are close to the situation in the field. From the results of the PLAXIS 3D modelling, it is found that the minimum pore water pressure occurs until the end of the stockpiling activity for 248 days. The use of PVD in combination with PHD is effectively applied in the field, indicated by the minimum pore water pressure that occurs is smaller than without using PHD. From the percentage of pore water pressure that occurs in the soil, 64,4% is greater by using PHD, meaning that the percentage of water that comes out is faster by using PHD. Keywords: Preloading, PVD, PHD, consolidation, PLAXIS 3D.
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Putra, Paksitya Purnama, Eka Patriyandi Oktavian, and Wiwik Yunarni Widiarti. "Analisis Perbaikan Tanah Lunak dengan Kombinasi Preloading dan Prefabricated Vertical Drain pada Pembangunan Jalan Tol Pematang Panggang – Kayu Agung, Sumatera Selatan." Jurnal Rekayasa Sipil dan Lingkungan 4, no. 2 (February 26, 2021): 107. http://dx.doi.org/10.19184/jrsl.v4i2.12389.

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The construction project of Pematang Panggang - Kayu Agung Toll Road, Section 4 is located in Ogan Komering Ilir Regency, South Sumatra. This project area has a soft clay soil type. With the condition of the soft soil, soft soil repairs need to be done at the project site. The soil improvement used is the Preloading Method combination of Prefabricated Vertical Drain (PVD) and Prefabricated Horizontal Drain (PHD). This method of repair is done by comparing the time of soil consolidation before and after using the Preloading combination of Prefabricated Vertical Drain (PVD) and Prefabricated Horizontal Drain (PHD) by measuring the time needed to achieve consolidation of 90% and the effectiveness of the Prefabricated Vertical Drain (PVD) installation pattern. With the installation of Prefabricated Vertical Drain on the pattern of installation of rectangles / rectangles with a distance of 0.8 m, it can accelerate consolidation to 19 weeks from the time before PVD is installed. It takes 130 years. Then hoarding with Hinisial = 11 meters is carried out, for the first stage of hoarding with a value of Hcr = 4.375 m carried out up to 4 m, the decrease that occurs is 1.0735 m so that the remaining stock is 2.9265 m. After the value of Cu (Undrained cohesion) has increased, for the second stage of stockpiling, the value of Hcr = 13,526 m. The decrease that occurred in the second stage was 1.6634 m with the rest of the embankment 5.3366 m. So the total embankment height that has been compressed is 8.2631 m. and to reach the Hfinal the next hoarding stage is carried out to reach 8.69 m
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42

Meena, Sangeetha, and Manikandan R. C. "Prevalence of peripheral neuropathy and peripheral artery disease in diabetic patients attending a tertiary care hospital." International Journal of Advances in Medicine 6, no. 5 (September 23, 2019): 1493. http://dx.doi.org/10.18203/2349-3933.ijam20194137.

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Background: Foot complications are one of the most devastating complications among diabetes all over the world. Both Diabetic Peripheral Neuropathy (DPN) and Peripheral Artery Disease (PAD) are responsible for diabetic foot complications. Aim of this study is to screen diabetic patients for both DPN and PAD.Methods: This is a cross-sectional study covering 200 diabetic patients attending a Teaching Hospital. Prevalence of DPN was assessed using Biothesiometer and PAD by measuring the Ankle Brachial Index using handheld Doppler.Results: 49.5% had DPN and 19.5% had PAD. 13% had both PAD and DPN. Most of the subjects were in 51-60 years age group constituting 36.5 %. 61.5% were females. 69.5% had diabetes for more than 10 years. 88% had their HbA1C of more than 6.5%.Conclusions: The prevalence of PVD is multi-fold higher in patients with diabetes with smoking, hyperglycemia, hypertension, dyslipidemia, as major risk factors. Ankle, brachial pressure index, is useful in identifying PVD and it needs further evaluation by an arterial color Doppler and digital subtraction angiography.
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43

Vu, Tuan Duc, Zhang Chen, Xianting Zeng, Meng Jiang, Shiyu Liu, Yanfeng Gao, and Yi Long. "Physical vapour deposition of vanadium dioxide for thermochromic smart window applications." Journal of Materials Chemistry C 7, no. 8 (2019): 2121–45. http://dx.doi.org/10.1039/c8tc05014g.

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In this paper, various PVD techniques, such as pulsed laser deposition (PLD), evaporation decomposition (ED) and sputtering, are examined with respect to their conditions for VO2fabrication, film quality and the strategies for film improvements.
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Cao, Yong Hua, and Jian Yu. "Application of Depth-Measurable Prefabricated Vertical Drains for Soft Ground Improvement." Applied Mechanics and Materials 405-408 (September 2013): 466–69. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.466.

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A kind of depth-measurable prefabricated vertical drains (PVD) was applied for soft ground improvement in Tianjin, China. Test was conducted to check the effectiveness of impulse method for detection of installation depth of PVD. The PVD were set into two groups in length: 20 m and 8 m. The installation depth of PVD was checked in 24 hours since they were installed. The tests result revealed that the measuring precision of impulse method is fairly good but it can be effect by the installation depth. The measuring precision can be controlled in 2% for most PVD when the installation depth was about 20 m. There is a fall down of precision when the installation depth was about 8 m. There is no need for additional construction measures when the PVD for impulse method are installed. All of the PVD installed can be checked for installation depth easily, so the apparatus and measuring method are good in operability and stability.
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Muratori, Manuela, Laura Fusini, Maria Elisabetta Mancini, Gloria Tamborini, Sarah Ghulam Ali, Paola Gripari, Marco Doldi, et al. "The Role of Multimodality Imaging in Left-Sided Prosthetic Valve Dysfunction." Journal of Cardiovascular Development and Disease 9, no. 1 (January 4, 2022): 12. http://dx.doi.org/10.3390/jcdd9010012.

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Prosthetic valve (PV) dysfunction (PVD) is a complication of mechanical or biological PV. Etiologic mechanisms associated with PVD include fibrotic pannus ingrowth, thrombosis, structural valve degeneration, and endocarditis resulting in different grades of obstruction and/or regurgitation. PVD can be life threatening and often challenging to diagnose due to the similarities between the clinical presentations of different causes. Nevertheless, identifying the cause of PVD is critical to treatment administration (thrombolysis, surgery, or percutaneous procedure). In this report, we review the role of multimodality imaging in the diagnosis of PVD. Specifically, this review discusses the characteristics of advanced imaging modalities underlying the importance of an integrated approach including 2D/3D transthoracic and transesophageal echocardiography, fluoroscopy, and computed tomography. In this scenario, it is critical to understand the strengths and weaknesses of each modality according to the suspected cause of PVD. In conclusion, for patients with suspected or known PVD, this stepwise imaging approach may lead to a simplified, more rapid, accurate and specific workflow and management.
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Ejim, O. S., V. Fonseca, A. Coumar, S. Mathur, J. L. Bell, and P. Dandona. "Fibronectin concentrations in plasma in peripheral vascular disease." Clinical Chemistry 34, no. 12 (December 1, 1988): 2426–29. http://dx.doi.org/10.1093/clinchem/34.12.2426.

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Abstract Fibronectin (Fn) concentrations were measured immunoturbidimetrically in plasma of normal subjects and patients with peripheral vascular disease (PVD) before and after venous compression, which caused Fn concentrations to increase in both normal subjects and PVD patients. Basal Fn concentrations and those after 10-min compression were not significantly different in normal subjects and PVD patients. Five minutes after the release of compression, Fn had consistently declined in normal subjects and reverted to baseline values; in contrast, in PVD patients values either increased further or decreased inconsistently. Thus the Fn concentration at 15 min was significantly (P less than 0.001) greater in PVD patients than in normal subjects. Plasma albumin concentrations, measured in parallel to ensure that changes in Fn concentrations were not nonspecific, increased to a greater extent in normal subjects than in PVD patients and reverted to normal after the removal of compression. The Fn/albumin ratio remained unchanged in normal subjects after venous compression, whereas that in PVD patients increased and remained higher, even after decompression. The sustained increase in plasma Fn concentrations and in the Fn/albumin ratio in PVD patients after venous compression may indicate endothelial injury.
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Canova, Tyler John, Rochell Issa, Patrick Baxter, Ian Thomas, Ehab Eltahawy, and Obi Ekwenna. "Cerebrovascular Disease Hospitalization Rates in End-Stage Kidney Disease Patients with Kidney Transplant and Peripheral Vascular Disease: Analysis Using the National Inpatient Sample (2005–2019)." Healthcare 12, no. 4 (February 10, 2024): 454. http://dx.doi.org/10.3390/healthcare12040454.

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Individuals with end-stage kidney disease (ESKD) face higher cerebrovascular risk. Yet, the impact of peripheral vascular disease (PVD) and kidney transplantation (KTx) on hospitalization rates for cerebral infarction and hemorrhage remains underexplored. Analyzing 2,713,194 ESKD hospitalizations (2005–2019) using the National Inpatient Sample, we investigated hospitalization rates for ischemic and hemorrhagic cerebrovascular diseases concerning ESKD, PVD, KTx, or their combinations. Patients hospitalized with cerebral infarction due to thrombosis/embolism/occlusion (CITO) or artery occlusion resulting in cerebral ischemia (AOSI) had higher rates of comorbid ESKD and PVD (4.17% and 7.29%, respectively) versus non-CITO or AOSI hospitalizations (2.34%, p < 0.001; 2.29%, p < 0.001). Conversely, patients hospitalized with nontraumatic intracranial hemorrhage (NIH) had significantly lower rates of ESKD and PVD (1.64%) compared to non-NIH hospitalizations (2.34%, p < 0.001). Furthermore, hospitalizations for CITO or AOSI exhibited higher rates of KTx and PVD (0.17%, 0.09%, respectively) compared to non-CITO or AOSI hospitalizations (0.05%, p = 0.033; 0.05%, p = 0.002). Patients hospitalized with NIH showed similar rates of KTx and PVD (0.04%) versus non-NIH hospitalizations (0.05%, p = 0.34). This nationwide analysis reveals that PVD in ESKD patients is associated with increased hospitalization rates with cerebral ischemic events and reduced NIH events. Among KTx recipients, PVD correlated with increased hospitalizations for ischemic events, without affecting NIH. This highlights management concerns for patients with KTx and PVD.
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48

Prasetio, Andreyan, and Aniek Prihatiningsih. "ANALISIS PENGGUNAAN PREFABRICATED VERTICAL DRAINS (PVD) PADA TANAH LEMPUNG LUNAK YANG TERDAPAT LAPISAN LENSA." JMTS: Jurnal Mitra Teknik Sipil 3, no. 1 (February 25, 2020): 119. http://dx.doi.org/10.24912/jmts.v3i1.7047.

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Problem that often occurs in soft cohesive soils is settlement caused by consolidation process. If construction activities doing when the soils has not been consolidated, settlement can occur. To accelerate the consolidation process, soil improvement are usually do, one method of soil improvement to accelarate the consolidation process is vertical drain using prefabricated vertical drains (PVD). The soft soil layers in the field are not always continuous, sometimes found soft soil layers that have a lens layer. In this study, will discuss about the settlement and consolidation time of soft soil layers that have a lens layer which has been improved by PVD with 1 meter distance. Infrastructure that stand on a location that is installed by PVD is taxiway and loading by Airbus A380 aircraft of 18,22ton/m2. Analysis using the 1 dimensional consolidation theory of Terzaghi. For PVD installation to a depth of 50 meters, preloading settlement of 234,80 cm with a consolidation time of 2260 days for the square pattern PVD and 1918 days for triangle pattern PVD. Post loading settlement for PVD installation depth of 50 meters by 2,50 cm. AbstrakMasalah yang sering terjadi pada tanah kohesif dan lunak adalah penurunan yang disebabkan proses konsolidasi. Penurunan dapat menyebabkan keretakan pada struktur konstruksi yang berada di atasnya. Jika suatu kegiatan konstruksi dilakukan saat tanah belum terkonsolidasi, maka konstruksi tersebut dapat mengalami penurunan.. Untuk mempercepat proses konsolidasi biasanya dilakukan perbaikan tanah, salah satu metode perbaikan tanah untuk mempercepat proses konsolidasi yaitu vertical drain dengan menggunakan prefabricated vertical drains (PVD). Lapisan tanah lunak yang terdapat di lapangan tidak selalu kontinu, terkadang ditemukan lapisan tanah lunak yang terdapat lapisan lensa. Pada penelitian ini, penulis akan membahas mengenai waktu konsolidasi yang dibutuhkan oleh lapisan tanah kohesif dan lunak yang terdapat lapisan lensa yang telah diperbaiki dengan menggunakan PVD berjarak 1 meter. Infrastruktur yang berdiri di atas lokasi yang dipasang PVD berupa taxiway dengan beban berupa pesawat Airbus A380 sebesar 18,22 ton/m2. Analisis dilakukan menggunakan teori konsolidasi 1 dimensi Terzaghi. Untuk pemasangan PVD hingga kedalaman 50 meter diperoleh penurunan pra pembebanan sebesar 234,80 cm dengan waktu konsolidasi selama 2260 hari untuk pemasangan PVD pola persegi dan selama 1918 hari untuk pola segitiga . Penurunan pasca pembebanan untuk pemasangan PVD hingga kedalaman 50 meter sebesar 2,5 cm.
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49

TAKAI, Osamu. "Recent Trends of PVD and CVD. Recent Ceramic Coatings by PVD and CVD." Journal of the Surface Finishing Society of Japan 46, no. 7 (1995): 586–89. http://dx.doi.org/10.4139/sfj.46.586.

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50

Duta, Liviu, and Ion N. Mihailescu. "Advances and Challenges in Pulsed Laser Deposition for Complex Material Applications." Coatings 13, no. 2 (February 8, 2023): 393. http://dx.doi.org/10.3390/coatings13020393.

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Various physical vapor deposition (PVD) techniques, such as molecular beam epitaxy, electron beam physical vapor deposition, pulsed laser deposition (PLD), arc discharge, magnetron sputtering and/or ion beam sputtering, are currently used for coating or growing thin films on solid substrates [...]
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