Mathematical model evaluation and parameter identification of pipe holder element

Pipe holders are the integral part of every pipeline and plays important role in vibration propagation and absorption in the pipes. Evaluation of mathematical model and parameter identification of clamping element are shown in this paper. Derived mathematical model provides good vibrational behavior approximation of real clamp thus allowing using it in various engineering calculations

Application of free vibration technique for evaluation of vibro-isolation properties of pipe fixing elements

One approach for reducing noises in pipeline transport systems is selection of appropriate fasteners. Therefore, it is important to know vibro-acoustic characteristics of the fastening elements. This paper proposes a measurement system for determination of dynamic properties of pipe fastening elements and describes performed experiments that demonstrate characteristics dependence on clamping force, construction of the holder and its vibration mode

Dynamic compensation of rotating blades imbalance

The purpose of this paper is to research an effect of factors that are creating an imbalance of fan rotating blades and to estimate the possibility of compensation for this parasitic effect. For this purpose the measurement system including hardware and software was developed. Measurements of vibrations and dynamic pressure of rotating two-blades fan, blades profile and lift force parameters at various rotation speed were performed. This paper presents compensation possibilities when mechanical and aerodynamic imbalance occurs

Analysis of fastening element impact on pipe modal vibrations

One of the approaches for noise reduction in pipeline transport systems lies in the selection of appropriate fasteners. Therefore, it is important to know how different pipe holders change vibrational behavior of the pipe. This paper investigates the influence of clamping elements on modal vibrations of the pipe. A measurement method is proposed for determination of the damping factor that appears due to the insertion of a pipe holder

Po Dievo vardo apreiškimo: du kalbėjimo būdai

[full article and abstract in Lithuanian; abstract in English] This article deals with the problem of speaking about God (Otherness). The author maintains that Revelation alone makes it possible to speak about God, but again, this speech manifests itself as a silence. The problem of talking about God is examined through the approach of philosophical theology, which also emphasizes the motive of Revelation. When God revealed His name, there was not one way to speak about God. With reference to the Revelation, philosophy gains the Christian motives that open new perspectives for speaking on God’s theme. On the basis of Thomism, speaking about God is not problematic – it is enough to highlight certain ontological differences, and it becomes clear what we should call God. However, such a speech does not avoid the aspect of speaking “about.” It is quite easy to adopt the onto-theological attitude, forgetting that the most meaningful way of talking about God rests on being silent. However, silence takes on a double meaning. On the one hand, silence is necessary for those who have not been given knowledge through Revelation and, on the other hand, silence is necessary when the secrets of the Kingdom of God are given by the very way of God’s Revelation.[straipsnis ir santrauka lietuvių kalba; santrauka anglų kalba] Straipsnyje nagrinėjama kalbėjimo apie Dievą (Kitybę) problema. Jame ginama tezė, kad tik apreiškimas sudaro sąlygas kalbėti apie Dievą, tačiau vėlgi šis kalbėjimas pasireiškia kaip tyla. Kalbėjimo apie Dievą problematika nagrinėjama filosofinės teologijos požiūriu, taip pat akcentuojamas apreiškimo motyvas. Dievui apreiškus savo vardą, atsirado ne vienas būdas kalbėti apie Dievą. Remiantis apreiškimu, filosofija įgauna krikščioniškų motyvų, kurie atskleidžia naujas perspektyvas kalbėti Dievo tema. Tačiau toks kalbėjimas neišvengia kalbėjimo „apie“ aspekto. Ganėtinai lengvai pereinama prie ontoteologinių nuostatų pamirštant, kad Kitybės patirtis priverčia žmogų nutilti. Tačiau tylėjimas įgauna dvejopą prasmę. Viena vertus, tylėjimas reikalingas tiems, kuriems apreiškimu nebuvo duotas žinojimas, o kita vertus – tylima tada, kai dangaus karalystės paslaptys yra atskleidžiamos paties Dievo apreiškimo būdu

Measurement system for analysis of autogyro rotor imbalance

This paper presents the measurement system that is designed for measurement and analysis of mechanical and aerodynamic unbalance. These types of unbalance occurs in mechanical systems composed of high radius blades, including rotorcrafts – autogyro. This work presents structure of the measurement system, processing and visualization process of measurement data

Analysis of fastening element impact on pipe modal vibrations

One of the approaches for noise reduction in pipeline transport systems lies in the selection of appropriate fasteners. Therefore, it is important to know how different pipe holders change vibrational behavior of the pipe. This paper investigates the influence of clamping elements on modal vibrations of the pipe. A measurement method is proposed for determination of the damping factor that appears due to the insertion of a pipe holder

Mortality from gastrointestinal congenital anomalies at 264 hospitals in 74 low-income, middle-income, and high-income countries: a multicentre, international, prospective cohort study

Background: Congenital anomalies are the fifth leading cause of mortality in children younger than 5 years globally. Many gastrointestinal congenital anomalies are fatal without timely access to neonatal surgical care, but few studies have been done on these conditions in low-income and middle-income countries (LMICs). We compared outcomes of the seven most common gastrointestinal congenital anomalies in low-income, middle-income, and high-income countries globally, and identified factors associated with mortality. // Methods: We did a multicentre, international prospective cohort study of patients younger than 16 years, presenting to hospital for the first time with oesophageal atresia, congenital diaphragmatic hernia, intestinal atresia, gastroschisis, exomphalos, anorectal malformation, and Hirschsprung's disease. Recruitment was of consecutive patients for a minimum of 1 month between October, 2018, and April, 2019. We collected data on patient demographics, clinical status, interventions, and outcomes using the REDCap platform. Patients were followed up for 30 days after primary intervention, or 30 days after admission if they did not receive an intervention. The primary outcome was all-cause, in-hospital mortality for all conditions combined and each condition individually, stratified by country income status. We did a complete case analysis. // Findings: We included 3849 patients with 3975 study conditions (560 with oesophageal atresia, 448 with congenital diaphragmatic hernia, 681 with intestinal atresia, 453 with gastroschisis, 325 with exomphalos, 991 with anorectal malformation, and 517 with Hirschsprung's disease) from 264 hospitals (89 in high-income countries, 166 in middle-income countries, and nine in low-income countries) in 74 countries. Of the 3849 patients, 2231 (58·0%) were male. Median gestational age at birth was 38 weeks (IQR 36–39) and median bodyweight at presentation was 2·8 kg (2·3–3·3). Mortality among all patients was 37 (39·8%) of 93 in low-income countries, 583 (20·4%) of 2860 in middle-income countries, and 50 (5·6%) of 896 in high-income countries (p<0·0001 between all country income groups). Gastroschisis had the greatest difference in mortality between country income strata (nine [90·0%] of ten in low-income countries, 97 [31·9%] of 304 in middle-income countries, and two [1·4%] of 139 in high-income countries; p≤0·0001 between all country income groups). Factors significantly associated with higher mortality for all patients combined included country income status (low-income vs high-income countries, risk ratio 2·78 [95% CI 1·88–4·11], p<0·0001; middle-income vs high-income countries, 2·11 [1·59–2·79], p<0·0001), sepsis at presentation (1·20 [1·04–1·40], p=0·016), higher American Society of Anesthesiologists (ASA) score at primary intervention (ASA 4–5 vs ASA 1–2, 1·82 [1·40–2·35], p<0·0001; ASA 3 vs ASA 1–2, 1·58, [1·30–1·92], p<0·0001]), surgical safety checklist not used (1·39 [1·02–1·90], p=0·035), and ventilation or parenteral nutrition unavailable when needed (ventilation 1·96, [1·41–2·71], p=0·0001; parenteral nutrition 1·35, [1·05–1·74], p=0·018). Administration of parenteral nutrition (0·61, [0·47–0·79], p=0·0002) and use of a peripherally inserted central catheter (0·65 [0·50–0·86], p=0·0024) or percutaneous central line (0·69 [0·48–1·00], p=0·049) were associated with lower mortality. // Interpretation: Unacceptable differences in mortality exist for gastrointestinal congenital anomalies between low-income, middle-income, and high-income countries. Improving access to quality neonatal surgical care in LMICs will be vital to achieve Sustainable Development Goal 3.2 of ending preventable deaths in neonates and children younger than 5 years by 2030

Mortality from gastrointestinal congenital anomalies at 264 hospitals in 74 low-income, middle-income, and high-income countries: a multicentre, international, prospective cohort study

Summary Background Congenital anomalies are the fifth leading cause of mortality in children younger than 5 years globally. Many gastrointestinal congenital anomalies are fatal without timely access to neonatal surgical care, but few studies have been done on these conditions in low-income and middle-income countries (LMICs). We compared outcomes of the seven most common gastrointestinal congenital anomalies in low-income, middle-income, and high-income countries globally, and identified factors associated with mortality. Methods We did a multicentre, international prospective cohort study of patients younger than 16 years, presenting to hospital for the first time with oesophageal atresia, congenital diaphragmatic hernia, intestinal atresia, gastroschisis, exomphalos, anorectal malformation, and Hirschsprung’s disease. Recruitment was of consecutive patients for a minimum of 1 month between October, 2018, and April, 2019. We collected data on patient demographics, clinical status, interventions, and outcomes using the REDCap platform. Patients were followed up for 30 days after primary intervention, or 30 days after admission if they did not receive an intervention. The primary outcome was all-cause, in-hospital mortality for all conditions combined and each condition individually, stratified by country income status. We did a complete case analysis. Findings We included 3849 patients with 3975 study conditions (560 with oesophageal atresia, 448 with congenital diaphragmatic hernia, 681 with intestinal atresia, 453 with gastroschisis, 325 with exomphalos, 991 with anorectal malformation, and 517 with Hirschsprung’s disease) from 264 hospitals (89 in high-income countries, 166 in middleincome countries, and nine in low-income countries) in 74 countries. Of the 3849 patients, 2231 (58·0%) were male. Median gestational age at birth was 38 weeks (IQR 36–39) and median bodyweight at presentation was 2·8 kg (2·3–3·3). Mortality among all patients was 37 (39·8%) of 93 in low-income countries, 583 (20·4%) of 2860 in middle-income countries, and 50 (5·6%) of 896 in high-income countries (p<0·0001 between all country income groups). Gastroschisis had the greatest difference in mortality between country income strata (nine [90·0%] of ten in lowincome countries, 97 [31·9%] of 304 in middle-income countries, and two [1·4%] of 139 in high-income countries; p≤0·0001 between all country income groups). Factors significantly associated with higher mortality for all patients combined included country income status (low-income vs high-income countries, risk ratio 2·78 [95% CI 1·88–4·11], p<0·0001; middle-income vs high-income countries, 2·11 [1·59–2·79], p<0·0001), sepsis at presentation (1·20 [1·04–1·40], p=0·016), higher American Society of Anesthesiologists (ASA) score at primary intervention (ASA 4–5 vs ASA 1–2, 1·82 [1·40–2·35], p<0·0001; ASA 3 vs ASA 1–2, 1·58, [1·30–1·92], p<0·0001]), surgical safety checklist not used (1·39 [1·02–1·90], p=0·035), and ventilation or parenteral nutrition unavailable when needed (ventilation 1·96, [1·41–2·71], p=0·0001; parenteral nutrition 1·35, [1·05–1·74], p=0·018). Administration of parenteral nutrition (0·61, [0·47–0·79], p=0·0002) and use of a peripherally inserted central catheter (0·65 [0·50–0·86], p=0·0024) or percutaneous central line (0·69 [0·48–1·00], p=0·049) were associated with lower mortality. Interpretation Unacceptable differences in mortality exist for gastrointestinal congenital anomalies between lowincome, middle-income, and high-income countries. Improving access to quality neonatal surgical care in LMICs will be vital to achieve Sustainable Development Goal 3.2 of ending preventable deaths in neonates and children younger than 5 years by 2030