... 3.3—Sampling and testing concrete 3.4—Details and placement of reinforcement 3.5—Forms 3.6—Concrete placing and finishing 3.7—Concrete protection and curing 3.8—Lining and coating Standard Practice for ... silos and stacking tubes for storing granular materials Silos for storing of ensilage have different requirements and are not included However, industrial stave silos for storage of granular materials ... silos, stave silos, and stacking tubes for storing granular materials It includes design and construction recommendations for cast-in-place or precast and conventionally reinforced or post-tensioned...
Ngày tải lên: 24/10/2014, 16:04
... peatlands, and peat by advancing scientific, technical, economic, and social knowl- edge and understanding. The members are involved in the study and use of peat, for instance, in agricul- ture, forestry, ... Scientist, Institute of Land Reclamation and Grassland Farming (IMUZ) at Falenty, Poland, who described and documented the moorsh-forming process as a generic soil concept for the management of ... individuals form a unique base not only for information exchange concerning the role of peatlands in the world’s geology, hydrology, climate, and ecology, but also for their wise and sustainable...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 2 pot
... Linear relationships between PD (g cm–3) and ash content (% w/w) were described as follows for peat materials: (Okruszko, 1971) (TGL 31222/03, 1985) and for mud materials: (TGL 31222/03, 1985) Table ... drying and wetting, and by microbial decomposition of organic substances The peat min-eralization rate depends on degree of decomposition and ash content, temperature, water and air contents, and ... conditions for intensive MFP, the transformation of peat materials into moorsh The MFP is initiated by soil consolidation and subsidence after drain-age, then accelerated by repeated shrinkage and swelling...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 3 ppsx
... 1000 H8-9 (Bartels and Kuntze, 1973) H8-9 (Bartels and Kuntze, 1973) H2-3 (Illner and Raasch, 1977) H7-8 (Illner and Raasch, 1977) H2-3 (Bartels and Kuntze, 1973) H3-4 (Bartels and Kuntze, 1973) ... the following form:(3.4) where h is pressure head, and K and Ks are unsaturated and saturated hydraulicconductivity values, respectively; aaaa, n and llll are empirical parameters; and m = (1–1/n) ... mechanism and magnitude of volume changes in organic soils due toswelling and shrinkage upon wetting and drying is the result of several forces acting at microscale and leading to soil subsidence and...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 5 pot
... CaCl2) of 4.5 for organic soils showing 30–60% SOM and rich in clay and silt; they also recommended a target pH of 4.0 for organic soils showing 30–60% SOM and rich in sand, as well as for organic ... field-moist pristine Sphagnum and forest sedge peat materials decreased by 0.07 pH unit between 30 min and 3 h after mixing, and stabilized after 7 h of equilibration For air-dry mineral soils, ... 1:2 and 1:4 volumetric ratios on pH values in 0.01 M CaCl2 and 1 M KCl suspension media between 3 and 7 for 30 field-moist moorsh samples On average, differences were 0.024 and 0.110 pH unit for...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 6 pptx
... P L–1, 9.10 mg K L–1 and 8.35 mg N L–1 (Kuntze and Eggelsmann, 1975).Coefficients of variations were 15 and 17% for K and Ca, respectively, comparedwith 48 and 67% for P and N, thus indicating ... transformed into kg ha–1 for eachstratum after accounting for moisture content and bulk density These N and P valueswere combined across depths as N and P accumulated in the 0–40, 40–80, and80–120 cm layers, ... pH 5,and in the inorganic NaHCO3-P and NaOH-P fractions above pH 5.5 The proportions of total P decreased markedly at pH values exceeding 4.5 for both organic andinorganic NaHCO3-P, and 6.2 for...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 7 pdf
... SOM content, and the soil capacity to supply P, Ca, and Fe to plants (Leeper, 1978; Mathur and Lévesque, 1983) Sorbed Cu is partially reversible (Kadlec and Rathbun, 1983), therefore, Cu may ... ionic strength, and soil solution composition (Kishk and Hassan, 1973; Harter, 1979; Dhillon et al., 1981; Duquette and Hendershot, 1990; Basta and Tabatabai, 1992a) The ability of HA and FA to remove ... (Veith and Sposito, 1977) C Results and Discussion The Xm varied from 24,326 to 55,157 mg kg–1 (Table 7.1), in agreement with those obtained by Goodman and Cheshire (1973), and Parent and Perron...
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 8 docx
... Chapman and Harris (1 981 ) Chapman and Harris (1 981 ) Chapman and Harris (1 981 ) Chapman and Harris (1 981 ) Chapman and Harris (1 981 ) Chapman and Harris (1 981 ) Chapman and Harris ... hydrophobic forces to adsorption. Whereas this would be true for nonpolar com- pounds, this interpretation cannot be used for polar species for which retention mechanisms other than hydrophobic forces ... hemist soil (sapric surface materials) and incubated in the laboratory for 150 days, Khan and Hamilton (1980) found that 43% of the initial 14 C added to the soil was in the form of bound residues....
Ngày tải lên: 11/08/2014, 15:20
ORGANIC SOILS and PEAT MATERIALS for SUSTAINABLE AGRICULTURE - CHAPTER 10 (end) ppsx
... in alternate rows of peat and sand at an angle of 135° and in sand covering the peat The peat:sand ratio was between 2:1 (coarse sand and fibric peat) and 1:2 (fine sand and sapric peat) Organic ... Poland, and Switzerland Meadows and pastures are considered to be the most effective conservation practice (see Table 10.3 for Poland) Arable lands are found mainly in Germany, The Netherlands, ... intensity of drainage, peat type and land management, the annual loss of elevation is in the range of 0.3–1.0 cm yr–1 for grassland, and 1.0–5.0 cm yr–1 for arable land Grassland is given priority in...
Ngày tải lên: 11/08/2014, 15:20
Application of chitin and chitosanbased materials for enzyme immobilizations: a review
... permeability and surface area suit-able for a chosen biotransformation Understandably, for food, pharmaceutical, medical and agricultural applications, nontoxicity and biocompatibility of the materials ... covalent attachment and crosslinking are effective and durable, but expensive and easily worsening the enzyme performance, and in mem-brane reactor-confinment, entrapment and microencapsula-tions ... rapidly once the standardized chitinous materials become available Crucially, as bio- and biodegradable polymers chitin/chitosan materials are eco-friendly, safe for humans and the natural environment....
Ngày tải lên: 24/08/2016, 16:38
Obstacles and favourable materials for extensive reading on 9th graders at hoai hai lower secondary school
... easier and with Trang 11much better performance and speed during their study Thus, learning to read efficiently and proficiently takes time It takes memorizing rules and practicing methods and techniques; ... long-term and continuous practice with reading for larger knowledge, vocabulary, grammatical structures, and ideas However, this effort will prove valuable in students‟ school performance and during ... reading and the reasons for those difficulties The interviews aimed at finding students‟ favorite materials for extensive reading so that the researcher can collect more precise and valuable data for...
Ngày tải lên: 31/10/2022, 21:38
Luận văn thạc sĩ obstacles and favourable materials for extensive reading on 9th graders at hoai hai lower secondary school = những khó khăn và tài liệu yêu thích cho việc đọc mở rộng của học sinh lớp 9 trường THCS hoài hải
... easier and with Trang 11much better performance and speed during their study Thus, learning to read efficiently and proficiently takes time It takes memorizing rules and practicing methods and techniques; ... long-term and continuous practice with reading for larger knowledge, vocabulary, grammatical structures, and ideas However, this effort will prove valuable in students‟ school performance and during ... reading and the reasons for those difficulties The interviews aimed at finding students‟ favorite materials for extensive reading so that the researcher can collect more precise and valuable data for...
Ngày tải lên: 08/05/2023, 16:01
Materials for Rigid and Flexible Printed Wiring Boards ppt
... Principles and Applications, Second Edition, Revised and Expanded, David Weston 113 Permanent Magnet Motor Technology: Design and Applications, Second Edition, Revised and Expanded, Jacek F Gieras and ... Ceramic Materials for Electronics: Processing, Properties, and Applications, Second Edition, Revised and Expanded, edited by Relva C Buchanan73 Electromagnetic Compatibility: Principles and Applications, ... Theory and Practice, Second Edition, Revised and Expanded, Mazen Abdel-Salam, Hussein Anis, Ahdab El-Morshedy, and Roshdy Radwan 111 EMI Filter Design: Second Edition, Revised and Expanded, Richard...
Ngày tải lên: 23/03/2014, 08:21
Algorithms for programmers ideas and source code ppt
... happens to be identical for forward and backward transform (with both decimation frequency/time) the sign of the transformappears here Or, more compactly: where j = 0, 1, 2, 3 and n is a multiple ... Hartley transform 72 Trang 45.1 Basis functions of the Walsh transforms 775.2 Dyadic convolution 78 5.3 The slant transform 80 6 The Haar transform 82 6.1 Inplace Haar transform ... trick that gives the inverse transform for free, if your implementation uses seperate arrays for Trang 25real and imaginary part of the complex sequences to be transformed If your procedure is something...
Ngày tải lên: 27/06/2014, 08:20
Báo cáo vật lý: "Synthesis and Characterization of Bismuth Tantalate Binary Materials for Potential Application in Multilayer Ceramic Capacitors (MLCC)" doc
... 99.99%) as starting materials Prior to weighting, both Bi2O3 and Ta2O5 were dried for 3 h at 300oC and 600oC, respectively Stoichiometric quantities of the oxides were weighted and mixed with sufficient ... similar to that of SbTaO4 type and then transformed into triclinic phase at temperature above 870oC.10 The present study focused on the phase formation, thermal and electrical properties of BiTaO4 ... 53–62, 2008 53 Synthesis and Characterization of Bismuth Tantalate Binary Materials for Potential Application in Multilayer Ceramic Capacitors (MLCC) K.B Tan*, F.G Anna and Z Zainal Chemistry...
Ngày tải lên: 07/08/2014, 14:20
Chapter 9: Working with Selections and Selection Layers
... box until all dirt and rough lines that may have scanned in disappear and the line art looks how you’d like it to be Click the Move and Transform tab and resize, reposition, and rotate your image ... pencils and may look better in the final print form (unless, of course, you’re going for the rough look) Unless you’ve got tight pencil line art without any need for cleanup, consider inking for ... Chapter 13 explains how you can take your completed work and prepare it for display on the Internet, print it for family and friends, or prepare it for professional printing 16_129869 ch10.qxp 11/29/07...
Ngày tải lên: 27/08/2012, 14:31
Tài liệu CLUTCHES AND BRAKES Design and Selection
... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Crawford, and Mark E Coticchia 34 Steam Plant Calculations Manual, V Ganapathy 35 Design Assurance for Engineers and Managers, John A Burgess 36 Heat Transfer Fluids and Systems for Process and ... Preston, George W Crawford, and Mark E Coticchia 44 Machinery Adhesives for Locking, Retaining, and Sealing, Girard S Haviland 45 Couplings and Joints: Design, Selection, and Application, Jon...
Ngày tải lên: 20/10/2012, 09:58
Improvement of recruitment and selection process in HKT Consultant Jsc
... enterprise productivity and development of a uniform organizational culture; recruiting the required workforce and making provisions for payroll and benefits and implementing resource strategies to ... This can lead to losses for the company and dissatisfaction for candidates Secondly, HKT conducts interviews for selecting the most suitable candidate for both the job and organization Interviewing ... duties to be performed and qualifications required Based on these requisotions, HR department will prepare the job description and person specification, and then locate and develop the sources of...
Ngày tải lên: 24/07/2013, 15:36
Tài liệu Clutches and brakes design and selection P6 ppt
... obtain design formulas for the torque capability and the required activation force is quite similar to that used for simple cone brakes and clutches Since the brakes illustrated in Figures and use ... equations (1-6) and (1-9) reduce to the correct expressions for the torque and activation force for an annular contact disk brake with a single friction surface Unlike plate clutch and brakes, it ... Upon integration the expression for the torque becomes T¼ Á Akpmax À ri r0 À r2 i sin a ð1-6Þ Since this expression vanishes for ri = and for ri = ro but not for intermediate values, we may set...
Ngày tải lên: 17/12/2013, 11:15
Tài liệu Clutches and brakes design and selection P7 pdf
... configuration of the OM and the coil housing, as shown in Figures and Both the shear and tensile stresses in these links resist relative motion between the IM and the OM and so transmit torque for the brake/clutch ... [1] and in Lammeraner and Starl [2] Units for the quantities involved will be given according to the MKS system (acronym for meters, kilograms, seconds) Maxwell’s equations (1-1) in vector form ... vector P and magnetization vector M are defined by P ¼ D À eo E and B ¼ Ao ðH þ M þ Mo Þ ð1-4Þ because both P and M vanish in free space The last two of equations (1-2) are replaced by D ¼ eE and H¼...
Ngày tải lên: 17/12/2013, 11:15