History of propulsion for single-stage-to-orbit and multiple-stage vehicles

1995 ◽  
Vol 11 (1) ◽  
pp. 98-104
Author(s):  
James A. Martin
Keyword(s):  
1951 ◽  
Vol 20 (2) ◽  
pp. 72-81 ◽  
Author(s):  
H. A. Wolfson

At the time of Clement of Alexandria there existed two theories with regard to the generation of the Logos. They may be described as the twofold stage theory and the single stage theory. According to the twofold stage theory, which reflects a similar conception in Philo,1 the Logos at first existed from eternity in God and then, prior to the creation of the world, it was generated from the essence of God as a distinct personal being. Representatives of this view are, among the Greek Fathers, Justin Martyr, Tatian, Athenagoras, Theophilus, and Hippolytus, and among the Latin Fathers, Tertullian, Novatian, Lactantius, and as late as the fourth century, Zeno of Verona. According to the single stage theory, the generation of the Logos from God was from eternity. The first to introduce this view were Irenaeus and Origen and it is this view which ultimately prevailed. Now with regard to Clement of Alexandria, who was a contemporary of both Irenaeus and Origen, it is the general opinion of students of the history of doctrine that he is to be included among those who introduced the single stage theory, though Zahn finds that Clement “always makes a sharp distinction between the only Unbegotten God the Father and the Son or Logos who was begotten or created before the rest of creation.”2 It is this general opinion which I wish to question in this paper.


2021 ◽  
Vol 14 (10) ◽  
pp. e245754
Author(s):  
Aabid Husain Ansari ◽  
Amit Kumar Gupta ◽  
Abhishek Vaish ◽  
Raju Vaishya

A 23-year-old female-treated patient of osteomalacia and secondary hyperparathyroidism with hypophosphatemia presented with a 5-year history of bilateral groin pain and stiffness of both hips and difficulty in walking. Plain radiographs of the pelvis showed bilateral coxa vara deformity. She was managed surgically by a single-stage bilateral subtrochanteric corrective osteotomy with the internal fixation. After the osteotomy healing at 3 months, the patient was pain free and walked comfortably with an increased range of hip motion.


2017 ◽  
Vol 28 (1) ◽  
pp. 63-67 ◽  
Author(s):  
Madhavan C. Papanna ◽  
Ryad Chebbout ◽  
Simon Buckley ◽  
Ian Stockley ◽  
Andrew Hamer

Introduction: Total hip arthroplasty (THA) is performed as a 2-stage or single stage procedure in patients with a history of septic arthritis of the native hip joint. The decision is based on whether the infection is active or quiescent in the joint. The aim of this study was to compare the outcomes of total hip arthroplasty for septic arthritis of the native hip to a control series of patients treated for primary osteoarthritis of the hip with standard THA. Methods: Between March 2000 and March 2013, 18 cases of septic arthritis of the hip treated with THA were retrospectively identified. During the same time period, 18 control cases of THA for degenerative osteoarthritis were identified. Cases and controls were comparable in age, gender, body mass index, type of anaesthesia and American Society of Anesthesiologists score. Results: 11 and 7 cases received 2-stage and single stage total hip arthroplasty respectively for septic arthritis. There was a mean interval of 4 months between 1st and 2nd-stage operations. Cases and controls were followed up for a mean of 70 and 72 months respectively. There was no reinfection or implant failure in the cases, and comparable functional outcomes between cases and controls. Conclusions: Two-stage and single-stage THA for active and quiescent native hip infection respectively, achieved similar outcomes to THA for primary osteoarthritis in controls.


2016 ◽  
Vol 2016 ◽  
pp. 1-3 ◽  
Author(s):  
Colleen F. Perez ◽  
Curtis W. Gaball

We present a method to create a tragus using the patient’s conchal cartilage. It is a simplified, single-stage technique with well-hidden incisions, yet it maintains the rigidity of a natural tragus. This patient did not have a history of radiation to the area, which may compromise healing with this technique. The cosmetic importance of the tragus has been described, but its functionality in accommodating modern technology has not been previously discussed. The main treatment goal for this patient was to gain the ability to wear earphones (clinical question/level of evidence: therapeutic, V).


Sign in / Sign up

Export Citation Format

Share Document