How to Manage and Maintain Paulownia tomentosa

An Introduction to Royal Paulownia: Royal Paulownia is a native of China where it is revered as a tree and loved for both its legends and its usability. The trees form is a bit ragged but can provide an enjoyable and dramatic, coarse-textured appearance with huge heart-shaped leaves and large clusters of lavender flowers in the spring. Paulownia flowers are usually set before leaf emergence so they really stand out against a neutral or evergreen background. With its very rapid growth rate, the princess-tree can reach 50 feet in height with an equal spread in an open landscape. Royal Paulownia Specifics: Scientific name: Paulownia tomentosaPronunciation: pah-LOE-nee-uh toe-men-TOE-suhCommon name(s): Princess-Tree, Empress-Tree, PaulowniaFamily: ScrophulariaceaeUSDA hardiness zones: 5B through 9Origin: not native to North AmericaUses: reclamation plant; tree has been successfully grown in urban areas where air pollution, poor drainage, compacted soil, and/or drought are commonAvailability: grown in small quantities by a small number of nurseries Invasive Exotic Status: Royal paulownia is a prolific seeder but not welcomed by many forest owners. Woody seed capsules form in autumn containing up to two-thousand seeds and can cover a large area using wind power. The seeds persist through the winter and have a high germination percentage. Seeds germinate readily in the landscape and because of this ability to take over a site, paulownia has been given invasive exotic tree status and planters are cautioned about its reproductive potential. Royal Paulownia Description: Height: 40 to 50 feetSpread: 40 to 50 feetCrown uniformity: irregular outline or silhouetteCrown shape: round; vase shapeCrown density: moderateGrowth rate: fastTexture: coarse Trunk and Branch Structure: Royal paulownias bark is thin and easily damaged from mechanical impact so be careful using equipment around the tree. Paulownia has a characteristic droop as the tree grows and will require pruning for vehicular or pedestrian clearance beneath its canopy. The tree is not particularly showy and to improve its appearance, should be grown with a single leader. There is a major pruning requirement: the tree needs regular pruning to develop a strong structure. Paulownia Foliage: Leaf arrangement: opposite/suboppositeLeaf type: simpleLeaf margin: entireLeaf shape: cordate; ovateLeaf venation: pinnate; palmateLeaf type and persistence: deciduousLeaf blade length: 8 to 12 inches; 4 to 8 inchesLeaf color: greenFall color: no fall color changeFall characteristic: not showy Pruning a Royal Paulownia: The Princess-Tree expresses rapid growth and can reach 8 feet in two years from seed. This causes frequent winter kill to tender growth. You will not find this to be a problem if you prune down to where an axillary bud can take over as the single leader. It is important to build a single leader as long as possible and there should be a clear stem to the first main branch at 6 feet or higher. This pruning process is especially important if you are wanting to utilize the tree for its wood. Royal Paulownia In Depth: Paulownia thrives best in deep, moist but well-drained soil that is sheltered from the wind. The tree has become naturalized in many parts of the southern United States so you can see them most anywhere in lower North American latitudes. Fuzzy, brown flower buds form in early autumn, persist over the winter and bloom in early spring. These buds may freeze in very cold weather and drop off. Woody seed capsules form in autumn containing up to two-thousand seeds. They can easily hibernate through the winter and germinate readily in the landscape or wherever they are carried. Leaves rapidly drop within one week following the first frost in autumn. Storm damage can be a problem as the tree is susceptible to breakage either at the crotch due to poor collar formation or the wood itself is weak and tends to break. It has no known insect enemies. There have been occasional reports of problems with mildew, leaf- spot and twig canker.

Essay on Retailing and Large Online Retailers - 751 Words

Problem set 3 Crystal Yu 1. Do problem 4.8 and 4.9 page 149 (2 points) You need to show your work to get credit. 4.8 Does it take more time to be removed from an email list than it used to take? A study of 100 large online retailers revealed the following: Need Three Or More Clicks to Be Removed Year Yes No Total 2009 39 61 100 2008 7 93 100 46 154 200 a. Give an example of a simple event Need less than 3 more clicks to be removed. b. Give an example of a joint event Need three or more clicks to be removed in 2008 (2 events : needs 3 or more clicks and happened in 2008) c. What is the complement of Needs three or more clicks to†¦show more content†¦There were 46 retailers surveyed in two years that need three or more clicks to be removed, 39 of them happened in 2009 -- So P = 39/46 = 84.78% b. Given that the year 2009 is involved, what is the probability that three or more clicks are needed to be removed from an email list? Of 100 retailers surveyed in 2009, 39 need there or more clicks to be removed --- So P = 39/100 = 39% c. Explain the difference in the results in (a) and (b). Results in (a) and (b) are different because the conditions are different. Condition of (a) means for those retailers that â€Å"needed three or more clicks to be removed† how many were surveyed in 2009. While condition of (b) means the opposite way, for those surveyed in 2009, how many retailers need 3 or more clicks. d. Are needing three or more clicks to be removed from an email list and the year independent? They are not independent. Refer to Equation 4.5 in textbook, p.154 shows that two events A and B are independent if and only if P(A│B) = P(A) Calculate the probabilities of the events : P(need three or more clicks to be removed) = 46/200 = 23% P(need three or more clicks to be removed given condition that occurred in 2009) = 39% Chapter 6 Individual work Using a Normal Distribution to find probabilities: You may use the tables in your text or PhStat – Probability Distributions – Normal. Regardless of which method you use, either draw a sketch andShow MoreRelatedTesco.Com as an Online Distribution Channel1451 Words   |  6 PagesPLC is an international grocery and general merchandise retailer based in Cheshunt, United Kingdom. Tesco is the worlds third biggest retailer after Wal-Mart and Carrefour (1), and the largest in the U.K. with a market share of over 30%, about twice the market share of its two closest competitors combined. 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Calculating Ankle Joint Angular Kinematics Health And Social Care Essay Free Essays

Kinematic information was obtained at 350Hz via an eight camera gesture analysis system as participants ran at 4.0ms-1+5 % , angles were created utilizing the coiling method and about XYZ, ZXY, XZY, YXZ, YZX and YXZ rotary motion cardan sequences. The consequences indicate that important scope of gesture chief effects were observed for the coronal and cross plane. We will write a custom essay sample on Calculating Ankle Joint Angular Kinematics Health And Social Care Essay or any similar topic only for you Order Now Furthermore, it was besides observed that extremum angle chief effects were found for the coronal and cross planes. Post-hoc analyses revealed that ROM and extremum values utilizing the YXZ sequence and extremum values utilizing the ZXY sequence were significantly greater than the others. A popular method of quantifying the angular place of a stiff dynamic frame with regard to a mention frame is via the use of independent angles known normally as cardan or Euler angles ( Schace et al. , 2001 ) . Cardan/Euler rotary motions are obtained by agencies of an order sequence of rotary motions ( Schace et al. , 2001 ) . Rotations are considered to happen about the axis of the section co-ordniate system. For illustration during an XYZ cardan sequence of rotary motions, the section is rotated about the X axes by an angle A, so rotates about a revolved Y ‘ by an angle B and so eventually rotated about a twice rotated Z † axes by an angle C ( Scahce et al. , 2001 ) . For a given gesture, different cardan sequences can act upon the angular computations ( Cole et al. , 1993 ) . The International Society of Biomechanics ( ISB ) recommends that joint angles be calculated utilizing an XYZ sequence of rotary motions ( Wu and Cavanagh 1995 ) . However, the big sum of sagittal plane gesture during pace can encroach on the representation of motions outside the sagittal plane ( transverse talk ) , ensuing in greater than expected coronal/transverse plane articulation profiles ( Thewlis et al. , 2008 ) . As such it has been proposed that the XYZ sequence when applied to rotary motions outside the sagittal plane may non be the most appropriate method. A choice figure of probes have examined the influence that changing the sequence of rotary motions has on the representation of segmental kinematics ( Schace et al. , 2001, Kavaduna et al. , 2000, Tupling and Pierrynowski 1987 and Thewlis et al. , 2008 ) . However none of these probes have focused on the consequence that changing the sequence may hold on ankle joint kinematics. In add-on to the normally used method of Cardan angles, coiling angles ( Woltring et al. , 1985 ) can besides be used to depict joint gesture when projected on to a plane. The coiling method from a mention place is described in footings of rotary motion about and interlingual rendition along a individual line or axis in infinite ( Robertson et al. , 2004 ) . The ankle articulation plays a cardinal function in the stance stage pace rhythm. In combination with the hip and articulatio genus articulations the mortise joint facilitates motive power and transmits forces and minutes during the stance stage when the pes is regarded as the interface of the human locomotor system with the environment. Therefore, motion of the mortise joint is an of import constituent of pace mechanics and as such the right reading of its motion is indispensable in kinematic analyses. This survey investigated the influence of the coiling method every bit good as the 6 available cardan sequences on ankle joint kinematics in the sagittal, coronal and cross planes. Method Participants Eleven male participants volunteered to take portion in this probe ( age 19 + 1 old ages ; Height 176.5 + 5.2 centimeter ; Mass 78.4 + 9.0 kilogram ) . All were injury free at the clip of informations aggregation and completed an informed consent signifier. Ethical blessing for this undertaking was obtained from the School of Psychology moralss commission, University of Central Lancashire and each participant provided verbal consent. A statistical power analysis of pilot informations was conducted in order to cut down the likeliness of a type II mistake and find the minimal figure participants needed for this probe. It was found that the sample size was sufficient to supply more than 70 % statistical power in the experimental step. Procedure An eight camera gesture analysis system ( Qualisys Medical AB, Goteburg, Sweden ) captured kinematic informations at 350Hz from each participant running at 4.0ms-1. Velocity was controlled utilizing infrared photoelectric cells Newtest 300 ( Newtest, Oy Koulukatu 31 B 11 90100 Oulu Finland ) , a maximal divergence of + 5 % from the in agreement speed was allowed. Participants ran over a force platform ( Kistler, Kistler Instruments Ltd. , Alton, Hampshire, UK ; Model 9281CA ) , stance clip was determined as the clip over which 20N or greater of perpendicular force was applied to the force platform. The marker set used for the survey was based on the CAST technique ( Cappozo et al. , ( 1995 ) . Retro-reflective markers were attached to the 1st and 5th metatarsal caputs, median and sidelong maleoli, median and sidelong epicondyle of the thighbone, with a tracking bunch positioned on the right shank. A inactive test was captured to specify the pes and tibial sections. Kinematic parametric quantities were quantified utilizing Ocular 3-D ( C-Motion Inc, Gaithersburg, USA ) and filtered utilizing at 6 Hz utilizing a zero-lag low base on balls Butterworth 4th order filter following insertion with a maximal spread fill of 10 frames. Five tests of ankle joint rotary motion during stance were averaged for each participant. Angles were created about an XYZ, ZXY, XZY, YXZ, YZX and YXZ rotary motion cardan sequence referenced to organize systems about the proximal terminal of the section, where Ten is flexion-extension ; Y is ab-adduction and is Z is internal-external rotary motion. Statistical Analysis Descriptive statistics including agencies and standard divergences were calculated for each status. Differences in stance stage kinematic variables were examined utilizing perennial steps ANOVA ‘s with significance accepted at the P A ; lt ; 0.05 degree. The Mauchly ‘s sphericalness premise was violated in all instances and as such the grades of freedom of the F statistic were adjusted via the Greenhouse Geisser rectification. The Shapiro-wilk statistic for each status confirmed that the informations were usually distributed. Appropriate post-hoc analyses were conducted utilizing a Bonferroni rectification to command for type I error. Effect sizes were calculated utilizing an Eta2. Cohen ‘s suggestion sing effects sizes was observed ( little R A ; lt ; 0.3 ; medium R A ; gt ; 0.3 and A ; lt ; 0.5 ; big A ; gt ; 0.5. All statistical processs were conducted utilizing SPSS 17.0. Consequence Tables 1 and 2 present scopes of gesture and peak angles observed in all three planes of rotary motion as a map of cardan sequence. Table1: Mean ( and standard divergence ) scope of gesture ( deg ) for each rotary motion as a map of cardan sequence ( * = important chief consequence ) n=11. Ten Yttrium Omega XYZ 27.94 + 10.34 5.62 + 3.86 4.67 + 3,21 XZY 26.75 + 11.35 5.29 + 5.13 5.88 + 4.52 YXZ 25.67 + 11.45 17.04 + 11.95 15.22 + 10.45 YZX 26.51 + 11.37 6.86 + 5.83 4.08 + 2.04 ZXY 26.38 + 10.12 15.96 + 27.51 28.78 + 11.73 ZYX 24.52 + 12.17 6.16 + 6.47 4.09 + 2.17 Coiling 25.45+8.64 5.26 + 6233 5.08 + 2.72 Main Effect * * Table 2: Mean ( and standard divergence extremum values ) ( deg ) for each rotary motion as a map of cardan sequence ( * = important chief consequence ) n=11. Ten Yttrium Omega XYZ -87.65 + 3.83 -11.04 + 5.48 -2.14 + 4.53 XZY -87.70 + 3.57 -11.15 + 5.46 0.21 + 4.78 YXZ -84.07 + 5.05 -68.25 + 24.29 -71.01 + 20.91 YZX -87.64 + 3.68 1.00 + 4.97 -11.71 + 4.80 ZXY -87.7 + 3.66 1.07 + 20.47 -1.42 + 13.41 ZYX -84.6 + 3.75 -3.18 + 4.88 -11.78 + 4.81 Coiling -87.75 + 2.40 -7.40 + 7.68 -11.91 + 3.27 Main Effect * * The consequences indicate that important scope of gesture chief effects were observed for the coronal F ( 1.85, 16.66 ) = 10.04, P A ; lt ; 0.05, eta2= 0.53 and cross plane F ( 2.04, 18.39 ) =21.91, P A ; lt ; 0.05, eta2=0.71. Post-hoc analyses revealed that both coronal and cross plane ROM utilizing the YXZ and ZXY sequences was significantly greater than the others. Furthermore, it was besides observed that extremum angle chief effects were found for the coronal F ( 2.28, 20.48 ) = 82.99, P A ; lt ; 0.05, eta2=0.90 and transverse planes F ( 2.08, 18.72 ) = 80.49, P A ; lt ; 0.05, eta2= 0.90. Post-hoc analyses revealed that peak coronal and cross plane angles utilizing the YXZ sequence were significantly greater than the others. Figure 1: Ankle joint kinematics in the sagittal, coronal and cross planes as a map of cardan sequence ( XYZ= black, XZY= red, YXZ=yellow, YZX=blue, ZXY= cyan, ZYX=green and Helical =purple. Discussion Euler/Cardan angles are used extensively within the Fieldss of clinical and sport biomechanics. However, the consequence of changing the sequence of rotary motions has yet to be investigated with regard to the ankle articulation composite. The consequences indicate that changing the sequence of rotary motions when detecting kinematics in the sagittal plane has no important affect on joint scope of gesture parametric quantities. This is unsurprising given the laterality of sagittal plane gesture at the mortise joint during pace. Leading to the decision that choosing the appropriate sequence of rotary motions is non an issue when look intoing kinematics in the sagittal plane. However, for the coronal and cross planes a important consequence was found in footings of both the scope of gesture and peak angle observed during the stance stage. The consequences of this survey with regard to the mortise joint articulation found that the ZXY and YXZ sequences significantly affected ankle joint kinematics bring forthing highly big values for both scope of gesture and peak angles. The mistake associated with these sequences is such that the kinematic estimations are anatomically unrealistic. It is interesting to observe that the two combinations which were observed to be significantly different from the others ( YXZ and ZXY ) each had X 2nd in the order of rotary motions. This was the instance even when the principal axis under probe is placed foremost ( i.e. ZXY when detecting transverse plane rotary motion and YXZ when detecting coronal plane rotary motion ) , where one would presume that the comparative orientation could non be affected by the grade of sagittal plane gesture holding been placed after it in the sequence. It appears based on these consequences that the ISB recommendations are appropriate for the representation of ankle joint kinematics and as such its usage is encouraged, as it will let comparing of future research trying to quantify ankle joint gesture performed by different research workers. In add-on the consequences suggest that the YXZ and ZXY sequences produce the greatest mistake and therefore the use of these sequences to quantify ankle gesture outside the sagittal plane is strongly discouraged. This survey emphasizes the demand for methods leting joint kinematics to be measured accurately. Therefore, guaranting joint map is represented right. How to cite Calculating Ankle Joint Angular Kinematics Health And Social Care Essay, Essay examples