What's the difference between jackknife and penknife?
Jackknife
Definition:
(n.) A large, strong clasp knife for the pocket; a pocket knife.
Example Sentences:
(1) The efficacy of subarachnoid injection of 8 ml lidocaine 0.5% was assessed in ten outpatients having perirectal surgery in the jackknife position.
(2) We examined the hemodynamic changes occurring with prone jackknife positioning during colorectal surgery.
(3) This score has been tested by the Jackknife method on the same sample (94% of well-classified patients), then validated on the other patients.
(4) Seventy-nine percent of patients in the study group were classified correctly when using the jackknife method.
(5) The jackknife is based on the observation of the estimator for subsamples, generally of size n-1, obtained from the original sample.
(6) All patients underwent colectomy, mucosal proctectomy, and ileoanal anastomosis in the jackknife position with complete removal of the rectoanal columnar mucosa above the dentate line (IAA) through the anus.
(7) Overall with these features 65.6% correct jackknifed classification of the 32 cases could be achieved.
(8) When the jackknife classification test was applied to this model, we could discriminate with 81% accuracy between the 4 groups of tissue studied.
(9) Adding the demographic variable "education level" to the model raises the jackknifed classification accuracy to 91.2%, yielding only seven misclassifications in the total sample of 80 volunteers.
(10) As a result of these experiments and theoretical considerations the jackknife version of the maximum likelihood estimation procedure is proposed as the statistical procedure of choice.
(11) We introduce modifications of previously published estimators appropriate for measurement of reliability in the case of stratified sampling frames and we interpret these measures in view of standard errors computed using the jackknife.
(12) A classification rule was established including these two measurements and its diagnostic performance evaluated by a jackknifed method amounted .83%.
(13) The results obtained by the various models were tested for robustness by jackknife validation ("leave n out" method).
(14) After discussing the history and theory of both the bootstrap and the jackknife, we illustrate the use of the bootstrap in the statistical analysis of correlation coefficients and the general linear model.
(15) The initial mucosectomy through the anus in the prone jackknife position is useful for this purpose.
(16) Confidence intervals for these indices were constructed using a jackknife procedure, and significance tests were performed by pairing selected indices.
(17) The percent correct classifications of flight segments using the jackknife procedure were 69% and 68%, respectively.
(18) Bias is reduced by means of a jackknifing procedure.
(19) It is similar to the well-known jackknife of Quenouille and Tukey.
(20) Motorways are also in trouble, with the Forth road bridge and Dartford crossing both closed, part of the M3 shut and the A1 northbound at Catterick in North Yorkshire blocked by two jackknifed lorries.
Penknife
Definition:
(n.) A small pocketknife; formerly, a knife used for making and mending quill pens.
Example Sentences:
(1) During one alleged sexual assault, he is said to have claimed, Proctor was persuaded not to cut off Nick’s genitals with a penknife only by the intervention of Heath, who was said by the witness to have been present during the sex attack at a large townhouse in London.
(2) It is not giving much away to say that the film builds to a graphic self-amputation, one that employs not only the rusty penknife blade but also a fair few of the knife's other attachments (the dinky little scissors, for example, with which the desperate Ralston, played with great intensity and lightness by James Franco, goes to work on a stubborn piano-wire of a tendon.)
(3) A directed history and examination revealed that the patient was stabbed in the back with a penknife while leaving a bus and stepped down onto a paralyzed leg, which collapsed beneath him.
(4) On another occasion, Proctor is also accused in the same venue of producing a penknife and threatened to cut Nick’s genitals.
(5) Whenever I go to the houses of parliament these days, I make sure that I leave my penknife behind, because it is bound to be seized by the security people.
(6) "This is a minimum of six months in prison for simply having a knife, potentially even a penknife, in your pocket.
(7) All he had with him was a rope, a video camera, a bottle of water and, crucially, a blunt penknife.
(8) Perhaps most crucially, after the first alleged rape, Sherwood said she began carrying a penknife and that she almost certainly cut the attacker during the second attack.
(9) Take up an extreme sport and, at best, you'll have to cut off your own hand with a penknife.
(10) During one alleged sexual assault, he is said to have claimed, Proctor was persuaded not to attack Nick’s genitals with a penknife only by the intervention of Heath, who was said by the witness to have been present during the sex attack at a large townhouse in London .
(11) The strange thing is, he says, Linda was even angrier with Steve (as a little girl she had tried to stab him with her penknife) but she dealt with the situation better.
(12) Does Boyle believe that everyone would react as Ralston did, with the blunt penknife, in that situation?
(13) This is a minimum of six months in prison for simply having a knife, potentially even a penknife, in your pocket – not, as I've read in some press reports , for a number of offences involving a knife.
(14) "Hogan-Howe is saying that if you go out of your house with a penknife and you have a previous knife-related offence, under this arrangement put forward by the Conservatives that person would go to prison.